2023-06-04 08:51:26 +00:00
370 changed files with 19259 additions and 44657 deletions
--- a/.gitignore
+++ b/.gitignore
@@ -363,7 +363,11 @@ MigrationBackup/
 FodyWeavers.xsd
 /venv/

-db.sqlite3
-
+Reskreen/server_config.py
+./db.sqlite3
+media/
 /mycaldav/export.pdf
 /vehicles/migrations/
+/vehicles/migrations_save/
+/carnet_rouge/migrations/
+/collabs/migrations/
--- a/.idea/Reskreen.iml
+++ b/.idea/Reskreen.iml
@@ -4,7 +4,7 @@
    <content url="file://$MODULE_DIR$">
      <excludeFolder url="file://$MODULE_DIR$/venv" />
    </content>
-    <orderEntry type="inheritedJdk" />
+    <orderEntry type="jdk" jdkName="Python 3.10" jdkType="Python SDK" />
    <orderEntry type="sourceFolder" forTests="false" />
  </component>
  <component name="PyDocumentationSettings">
--- a/.idea/misc.xml
+++ b/.idea/misc.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
-  <component name="ProjectRootManager" version="2" project-jdk-name="Python 3.10 (Reskreen)" project-jdk-type="Python SDK" />
+  <component name="ProjectRootManager" version="2" project-jdk-name="Python 3.10" project-jdk-type="Python SDK" />
  <component name="PyCharmProfessionalAdvertiser">
    <option name="shown" value="true" />
  </component>
--- a/Reskreen/settings.py
+++ b/Reskreen/settings.py
@@ -11,6 +11,8 @@ https://docs.djangoproject.com/en/4.0/ref/settings/
 """

 from pathlib import Path
+import os
+from Reskreen.server_config import *

 # Build paths inside the project like this: BASE_DIR / 'subdir'.
 BASE_DIR = Path(__file__).resolve().parent.parent
@@ -25,7 +27,6 @@ SECRET_KEY = 'django-insecure-j4jd&+4j^t_=@zr(#q@n!8e*58vkql6&_6w-t14ju8pw%ei%^s
 # SECURITY WARNING: don't run with debug turned on in production!
 DEBUG = True

-cfg_dev_mode = False

 ALLOWED_HOSTS = ["rh.ambulance-clerc.ch"]
 if cfg_dev_mode:
@@ -36,6 +37,7 @@ CSRF_TRUSTED_ORIGINS = ['https://rh.ambulance-clerc.ch']
 # Application definition

 INSTALLED_APPS = [
+    'jazzmin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
@@ -48,10 +50,56 @@ INSTALLED_APPS = [
    'custom_admin.apps.CustomAdminConfig',
    'rangefilter',
    'django.contrib.admin',
-
+    'carnet_rouge.apps.CarnetRougeConfig',
+    #'nextcloud.apps.NextcloudConfig',
+    'django_quill',
+    'django_summernote',

 ]

+
+MEDIA_URL = '/media/'
+MEDIA_ROOT = os.path.join(BASE_DIR, 'media/')
+X_FRAME_OPTIONS = 'SAMEORIGIN'
+
+MAX_IMAGE_PIXELS = int(1024 * 1024 * 1024 // 4 // 3)
+SUMMERNOTE_THEME = 'bs4'
+SUMMERNOTE_CONFIG = {
+    # Using SummernoteWidget - iframe mode, default
+    'iframe': True,
+    'attachment_filesize_limit': 2621440 ,
+
+
+    'summernote': {
+            # As an example, using Summernote Air-mode
+            'airMode': False,
+
+
+            # Change editor size
+            'width': '100%',
+            'height': '480',
+
+            # Use proper language setting automatically (default)
+            'lang': "fr-FR",
+
+            # Toolbar customization
+            # https://summernote.org/deep-dive/#custom-toolbar-popover
+            'toolbar': [
+                ['view', ['undo','redo','fullscreen', 'codeview', 'help']],
+                ['fontfamily',['fontsize']],
+                ['font', ['bold', 'italic', 'underline', 'superscript', 'subscript', 'clear']],
+                ['color', ['forecolor','backcolor']],
+                ['para', ['ul', 'ol', 'paragraph']],
+                ['table', ['table']],
+                ['insert', ['link', 'picture', 'video', 'hr']],
+                ['style', ['style']],
+            ],
+    }
+}
+
+DATA_UPLOAD_MAX_NUMBER_FIELDS = 2500
+
+
 MIDDLEWARE = [
    'django.middleware.security.SecurityMiddleware',
    'django.contrib.sessions.middleware.SessionMiddleware',
@@ -161,16 +209,16 @@ DEFAULT_AUTO_FIELD = 'django.db.models.BigAutoField'

 JAZZMIN_SETTINGS = {
    # title of the window (Will default to current_admin_site.site_title if absent or None)
-    "site_title": "Reskreen-Admin",
+    "site_title": "ClercNet-Admin",

    # Title on the login screen (19 chars max) (defaults to current_admin_site.site_header if absent or None)
-    "site_header": "Reskreen",
+    "site_header": "ClercNet",

    # Title on the brand (19 chars max) (defaults to current_admin_site.site_header if absent or None)
-    "site_brand": "Reskreen",
+    "site_brand": "ClercNet",

    # Logo to use for your site, must be present in static files, used for brand on top left
-    "site_logo": "books/img/logo.png",
+    "site_logo": "img/logo.png",

    # CSS classes that are applied to the logo above
    "site_logo_classes": "img-circle",
@@ -179,10 +227,10 @@ JAZZMIN_SETTINGS = {
    "site_icon": None,

    # Welcome text on the login screen
-    "welcome_sign": "Welcome to the Reskreen admin",
+    "welcome_sign": "Welcome to the ClercNet admin",

    # Copyright on the footer
-    "copyright": "Resk-U",
+    "copyright": "Ambulance Clerc & Resk-U",

    # The model admin to search from the search bar, search bar omitted if excluded
    "search_model": "auth.User",
@@ -207,7 +255,7 @@ JAZZMIN_SETTINGS = {
        {"model": "auth.User"},

        # App with dropdown menu to all its models pages (Permissions checked against models)
-        {"app": "polls"},
+        {"app": "carnet_rouge"},
    ],

    #############
@@ -290,3 +338,11 @@ JAZZMIN_SETTINGS = {
    # Add a language dropdown into the admin
    "language_chooser": False,
 }
+
+if cfg_dev_mode:
+    NEXTCLOUD_HOST = "cloud.ambulance-clerc.ch"
+else:
+    NEXTCLOUD_HOST = "cloud.ambulance-clerc.ch"
+NEXTCLOUD_USER_DEFAULT_PASSWORD = "Mc144*1870"
+
+
--- a/Reskreen/static/img/logo.png
+++ b/Reskreen/static/img/logo.png
--- a/Reskreen/urls.py
+++ b/Reskreen/urls.py
@@ -16,11 +16,22 @@ Including another URLconf
 from django.contrib import admin
 from django.urls import path, include

+from django.conf import settings
+from django.conf.urls.static import static
+from django.views.generic import RedirectView
+
 urlpatterns = [
+    path('', RedirectView.as_view(url='admin/login/', permanent=False), name='/'),
    path('admin/', admin.site.urls),
    path('accounts/', admin.site.urls),
    path('collabs/', include('collabs.urls')),
    path('vehicules/', include('vehicles.urls')),
    path('caldav/', include('mycaldav.urls')),
    #path('collabs_hour/', include('collabs.urls')),
+    path('carnet_rouge/', include('carnet_rouge.urls')),
+    path('summernote/', include('django_summernote.urls')),
+    path('editor/', include('django_summernote.urls')),
 ]
+
+if settings.DEBUG:
+    urlpatterns += static(settings.MEDIA_URL, document_root=settings.MEDIA_ROOT)
--- a/venv/Lib/site-packages/pip/_vendor/html5lib/filters/init.py
+++ b/venv/Lib/site-packages/pip/_vendor/html5lib/filters/init.py
--- a/carnet_rouge/admin.py
+++ b/carnet_rouge/admin.py
@@ -0,0 +1,104 @@
+from django.contrib import admin
+
+
+from carnet_rouge.models import cr_Category, cr_Message
+from django.contrib.auth.models import User
+from django.contrib.admin import SimpleListFilter
+from django.utils.encoding import force_str
+from django.utils.translation import gettext_lazy as _
+
+from django_summernote.admin import SummernoteModelAdmin
+
+class DefaultListFilter(SimpleListFilter):
+    all_value = '_all'
+
+    def default_value(self):
+        raise NotImplementedError()
+
+    def queryset(self, request, queryset):
+        if self.parameter_name in request.GET and request.GET[self.parameter_name] == self.all_value:
+            return queryset
+
+        if self.parameter_name in request.GET:
+            return queryset.filter(**{self.parameter_name:request.GET[self.parameter_name]})
+
+        return queryset.filter(**{self.parameter_name:self.default_value()})
+
+    def choices(self, cl):
+        yield {
+            'selected': self.value() == self.all_value,
+            'query_string': cl.get_query_string({self.parameter_name: self.all_value}, []),
+            'display': _('All'),
+        }
+        for lookup, title in self.lookup_choices:
+            yield {
+                'selected': self.value() == force_str(lookup) or (self.value() == None and force_str(self.default_value()) == force_str(lookup)),
+                'query_string': cl.get_query_string({
+                    self.parameter_name: lookup,
+                }, []),
+                'display': title,
+            }
+
+class StatusFilter(DefaultListFilter):
+    title = _('Actif ')
+    parameter_name = 'bEnabled__exact'
+
+    def lookups(self, request, model_admin):
+        return ((0,'Désactivé'), (1,'Activé'))
+
+    def default_value(self):
+        return 1
+
+@admin.register(cr_Message)
+class cr_Message_Admin(SummernoteModelAdmin):
+    summernote_fields = ('sText',)
+    class Meta:
+        verbose_name = 'Message carnet rouge'
+        verbose_name_plural = 'Messages carnet rouge'
+    def save_model(self, request,obj , form, change):
+        obj.Author = request.user
+        obj.sAuthor = request.user.first_name + " " + request.user.last_name
+
+        #Get all user of selected group
+        obj.sDestUsers = "" # reset
+        users_all = User.objects.filter(groups__name=obj.DestGroup.name)
+        _con = ""
+        for usr in users_all:
+            obj.sDestUsers += f"{_con}[{usr.id}]"
+            _con = ";"
+
+        obj.sNotReadUsers = obj.sDestUsers
+        obj.save()
+
+    def has_change_permission(self, request, obj=None):
+        if obj is not None and obj.Author != request.user :
+            return False
+        return True
+
+    def has_delete_permission(self, request, obj=None):
+        if obj is not None and obj.Author != request.user and not request.user.is_superuser:
+            return False
+        return True
+
+
+
+
+    always_show_username = True
+    list_display = ('MessageId','sTitle', 'DestGroup', 'get_dtCreated',  'sAuthor','bEnabled', 'calc_read_quotas')
+    list_filter = ["sAuthor", StatusFilter]
+    fields = ["Caterogy", "DestGroup", 'sTitle', "sText", "dtValidityFrom", "dtValidityTo", "bEnabled"]
+    search_fields = ['sTitle', 'sText']
+
+
+    """
+    list_filter = [('dtDate', DateRangeFilter), ('user', admin.RelatedOnlyFieldListFilter),'sBases','type', 'bNoticed']
+
+    search_fields = ['userName']
+    readonly_fields = ["userName"]
+
+    
+    """
+
+
+# Register your models here.
+admin.site.register(cr_Category)
--- a/carnet_rouge/apps.py
+++ b/carnet_rouge/apps.py
@@ -0,0 +1,6 @@
+from django.apps import AppConfig
+
+
+class CarnetRougeConfig(AppConfig):
+    default_auto_field = 'django.db.models.BigAutoField'
+    name = 'carnet_rouge'
--- a/carnet_rouge/forms.py
+++ b/carnet_rouge/forms.py
@@ -0,0 +1,7 @@
+from django import forms
+from carnet_rouge.models import cr_Message
+
+class CrForm(forms.ModelForm):
+    class Meta:
+        model = cr_Message
+        fields = ('sText',)
--- a/carnet_rouge/models.py
+++ b/carnet_rouge/models.py
@@ -0,0 +1,74 @@
+import datetime
+from django.db import models
+from django.conf import settings
+from django.contrib.auth.models import Group
+from django.utils import timezone
+import uuid
+from django_quill.fields import QuillField
+
+from django.dispatch import receiver
+from django.db.models.signals import pre_save
+
+
+# Create your models here.
+class cr_Category(models.Model):
+    sName = models.CharField("Désignation", max_length=250)
+    dtUpdated = models.DateTimeField('date updated', auto_now=True)
+    dtCreated = models.DateTimeField('date published', auto_now_add=True)
+
+    def __str__(self):
+        return self.sName
+
+    class Meta:
+        verbose_name = "catégorie"
+        verbose_name_plural = "catégories"
+
+def increment_MessageId():
+    last_id = cr_Message.objects.all().order_by('MessageId').last()
+    if not last_id:
+        return 1
+    last_id = last_id.MessageId
+    return last_id + 1
+
+class cr_Message(models.Model):
+    uuid = models.UUIDField(default=uuid.uuid4(), editable=False, primary_key=True)
+    MessageId = models.IntegerField("ID Message",editable=False, unique=True, default=increment_MessageId)
+    Caterogy = models.ForeignKey(cr_Category, on_delete=models.DO_NOTHING, verbose_name="Catégorie")
+    sDestUsers = models.TextField("Liste des utilisateurs cibles")
+    sNotReadUsers = models.TextField()
+    sReadedUsers = models.TextField("Liste des utilisateurs ayant lu", blank=True)
+    DestGroup = models.ForeignKey(Group, on_delete=models.DO_NOTHING, verbose_name="Groupe de destination")
+    sTitle = models.CharField("Titre", max_length=120)
+    sText = models.TextField ("Corps de texte")
+    dtValidityFrom = models.DateField("Validité depuis",default=timezone.now)
+    dtValidityTo = models.DateField("Validité jusqu'à", blank=True, null=True)
+    bEnabled = models.BooleanField("Actif", default=True)
+
+    Author = models.ForeignKey(settings.AUTH_USER_MODEL, verbose_name="Auteur", on_delete=models.SET_NULL, null=True)
+    sAuthor = models.CharField("Auteur", max_length=120)
+
+
+    dtUpdated = models.DateTimeField('date updated', auto_now=True)
+    dtCreated = models.DateTimeField('date published', auto_now_add=True)
+
+
+
+    def get_dtCreated(self):
+        return self.dtCreated.strftime("%d.%b.%Y %H:%M:%S")
+
+    def calc_read_quotas(self):
+        obj = self
+        n_dest = obj.sDestUsers.count('[')
+        n_readed = obj.sReadedUsers.count('[')
+
+        if n_dest == 0:
+            return "No dest"
+
+        return f"{(n_readed/n_dest)*100}%"
+    def __str__(self):
+        return self.sTitle
+
+    class Meta:
+        verbose_name = "message"
+        verbose_name_plural = "messages"
+
--- a/carnet_rouge/static/bootstrap.min.css
+++ b/carnet_rouge/static/bootstrap.min.css
--- a/carnet_rouge/static/style.css
+++ b/carnet_rouge/static/style.css
@@ -0,0 +1,8 @@
+img {
+    max-width: 100%;
+}
+footer {
+    font-size: 12px;
+    padding: 10px;
+    background-color: #eee;
+}
--- a/carnet_rouge/templates/base.html
+++ b/carnet_rouge/templates/base.html
@@ -0,0 +1,51 @@
+{% load static %}
+<!doctype html>
+<html lang="ko">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport"
+          content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
+
+
+
+
+
+    <!-- Custom CSS -->
+    <link rel="stylesheet" href="{% static 'bootstrap.min.css' %}">
+    <link rel="stylesheet" href="{% static 'style.css' %}">
+    <title>django-quill-editor</title>
+</head>
+<body>
+<div id="wrap">
+    <nav class="navbar navbar-expand navbar-dark bg-primary mb-3 ps-3 pe-3">
+        <a href="" class="navbar-brand">Intranet Ambulance Clerc</a>
+        <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarColor01"
+                aria-controls="navbarColor01"
+                aria-expanded="false" aria-label="Toggle navigation">
+            <span class="navbar-toggler-icon"></span>
+        </button>
+
+        <div class="w-100">
+            <ul class="navbar-nav">
+                <li class="nav-item">
+
+                </li>
+                <li class="nav-item mr-auto">
+                    <a href="{% url 'admin:index' %}" class="nav-link" target="_blank">Administration intranet</a>
+                </li>
+                <li class="nav-item">
+                    <a class="nav-link" href="{% url 'carnet_rouge:cr_not_read_list' %}" target="_blank">Repository</a>
+                </li>
+            </ul>
+        </div>
+    </nav>
+    {% block content %}
+    {% endblock %}
+    <footer class="mt-2 text-center">© 2023 <a href="https://ambulance-clerc.ch"
+                                                      target="_blank">Ambulance Clerc</a></footer>
+
+    {% block script %}
+    {% endblock %}
+</div>
+</body>
+</html>
--- a/carnet_rouge/templates/carnet_rouge/base_cr.html
+++ b/carnet_rouge/templates/carnet_rouge/base_cr.html
@@ -0,0 +1,19 @@
+{% extends 'base.html' %}
+
+{% block content %}
+    <div class="container">
+        <div class="row d-flex align-items-center mb-3">
+            <div class="col-125 col-md-12  mb-sm-2 mb-xs-2">
+                <h2 class="mb-0">{% block title %}title{% endblock %}</h2>
+            </div>
+            <div class="col-12 col-md-12 col-lg-9">
+                <div class="d-flex justify-content-end">
+
+
+                </div>
+            </div>
+        </div>
+        {% block cr_content %}
+        {% endblock %}
+    </div>
+{% endblock %}
--- a/carnet_rouge/templates/carnet_rouge/cr_message.html
+++ b/carnet_rouge/templates/carnet_rouge/cr_message.html
@@ -0,0 +1,7 @@
+<div class="card">
+    <div class="card-body">
+        <div>
+            {{ obj.sText|safe }}
+        </div>
+    </div>
+</div>
--- a/carnet_rouge/templates/carnet_rouge/cr_message_detail.html
+++ b/carnet_rouge/templates/carnet_rouge/cr_message_detail.html
@@ -0,0 +1,6 @@
+{% extends 'carnet_rouge/base_cr.html' %}
+
+{% block title %}<h2>Détail du message: {{ object.sTitle }}</h2>{% endblock %}
+{% block cr_content %}
+    {% include 'carnet_rouge/cr_message.html' with obj=object %}
+{% endblock %}
--- a/carnet_rouge/templates/carnet_rouge/cr_message_list.html
+++ b/carnet_rouge/templates/carnet_rouge/cr_message_list.html
@@ -0,0 +1,19 @@
+{% extends 'carnet_rouge/base_cr.html' %}
+
+{% block title %}Messages non lus{% endblock %}
+{% block cr_content %}
+    <div class="row">
+        <div class="col">
+            {% if object_list %}
+                {% for obj in object_list %}
+                    <h2>{{ obj.sTitle }}</h2>
+                    {% include 'carnet_rouge/cr_message.html' with obj=obj %}
+                    {% if not forloop.last %}
+                        <hr>{% endif %}
+                {% endfor %}
+            {% else %}
+                <p>There is no post.</p>
+            {% endif %}
+        </div>
+    </div>
+{% endblock %}
--- a/carnet_rouge/templates/form_view.html
+++ b/carnet_rouge/templates/form_view.html
@@ -0,0 +1,15 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <title>Title</title>
+    {{ form.media }}
+</head>
+<body>
+test
+<form action="" method="POST">{% csrf_token %}
+    {{ form.sText }}
+</form>
+{{ obj.sText }}
+</body>
+</html>
--- a/carnet_rouge/tests.py
+++ b/carnet_rouge/tests.py
@@ -0,0 +1,3 @@
+from django.test import TestCase
+
+# Create your tests here.
--- a/carnet_rouge/urls.py
+++ b/carnet_rouge/urls.py
@@ -0,0 +1,15 @@
+from django.urls import path, include
+
+from django.conf import settings
+from django.conf.urls.static import static
+
+
+from carnet_rouge import views
+
+app_name = "carnet_rouge"
+urlpatterns = [
+    path('cr', views.model_form_view, name='model_form_view'),
+    path('view/<uuid:pk>', views.CrDetailView.as_view(), name='cr_view'),
+    path('notread', views.CrNotReadView.as_view(), name='cr_not_read_list'),
+
+]
--- a/carnet_rouge/views.py
+++ b/carnet_rouge/views.py
@@ -0,0 +1,30 @@
+from django.shortcuts import render
+from carnet_rouge.forms import CrForm
+from django.views.generic import ListView, UpdateView, DetailView, FormView, CreateView
+
+from carnet_rouge.models import *
+
+def model_form_view(request):
+    return render(request, "form_view.html", {'form': CrForm()})
+
+class CrDetailView(DetailView):
+    model = cr_Message
+
+    def get_context_data(self, **kwargs):
+        context = super().get_context_data(**kwargs)
+        context["test"] = timezone.now()
+        return context
+
+
+class CrNotReadView(ListView):
+    model = cr_Message
+
+    def get_context_data(self, **kwargs):
+        context = super().get_context_data(**kwargs)
+        context["test"] = timezone.now()
+        return context
+def cr_view(request, id):
+    print(id)
+    cr = cr_Message.objects.get(pk=id)
+    return render(request, "form_view.html", {'form': CrForm(), 'obj': cr})
+# Create your views here.
--- a/db.sqlite3
+++ b/db.sqlite3
--- a/db.sqlite3_old
+++ b/db.sqlite3_old
--- a/requirements.txt
+++ b/requirements.txt
@@ -13,7 +13,6 @@ cssselect2==0.4.1
 Django==4.0
 django-admin-rangefilter==0.8.3
 django-baton==2.2.3
-django-jazzmin==2.4.8
 fonttools==4.29.1
 fpdf==1.7.2
 future==0.18.2
@@ -56,3 +55,5 @@ x-wr-timezone==0.0.5
 xhtml2pdf==0.2.7
 zopfli==0.1.9
 django-autologin
+django-summernote
+django-jazzmin
--- a/templates/admin/index_save.html
+++ b/templates/admin/index_save.html
--- a/vehicles/static/vehicles/images/Thumbs.db
+++ b/vehicles/static/vehicles/images/Thumbs.db
--- a/venv/Lib/site-packages/pip-21.2.4.dist-info/INSTALLER
+++ b/venv/Lib/site-packages/pip-21.2.4.dist-info/INSTALLER
@@ -1 +0,0 @@
-pip
--- a/venv/Lib/site-packages/pip-21.2.4.dist-info/LICENSE.txt
+++ b/venv/Lib/site-packages/pip-21.2.4.dist-info/LICENSE.txt
@@ -1,20 +0,0 @@
-Copyright (c) 2008-2021 The pip developers (see AUTHORS.txt file)
-
-Permission is hereby granted, free of charge, to any person obtaining
-a copy of this software and associated documentation files (the
-"Software"), to deal in the Software without restriction, including
-without limitation the rights to use, copy, modify, merge, publish,
-distribute, sublicense, and/or sell copies of the Software, and to
-permit persons to whom the Software is furnished to do so, subject to
-the following conditions:
-
-The above copyright notice and this permission notice shall be
-included in all copies or substantial portions of the Software.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
-EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
-MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
-NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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-Name: pip
-Version: 21.2.4
-Summary: The PyPA recommended tool for installing Python packages.
-Home-page: https://pip.pypa.io/
-Author: The pip developers
-Author-email: distutils-sig@python.org
-License: MIT
-Project-URL: Documentation, https://pip.pypa.io
-Project-URL: Source, https://github.com/pypa/pip
-Project-URL: Changelog, https://pip.pypa.io/en/stable/news/
-Platform: UNKNOWN
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-Classifier: Intended Audience :: Developers
-Classifier: License :: OSI Approved :: MIT License
-Classifier: Topic :: Software Development :: Build Tools
-Classifier: Programming Language :: Python
-Classifier: Programming Language :: Python :: 3
-Classifier: Programming Language :: Python :: 3 :: Only
-Classifier: Programming Language :: Python :: 3.6
-Classifier: Programming Language :: Python :: 3.7
-Classifier: Programming Language :: Python :: 3.8
-Classifier: Programming Language :: Python :: 3.9
-Classifier: Programming Language :: Python :: Implementation :: CPython
-Classifier: Programming Language :: Python :: Implementation :: PyPy
-Requires-Python: >=3.6
-License-File: LICENSE.txt
-
-pip - The Python Package Installer
-==================================
-
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-   :target: https://pypi.org/project/pip/
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-   :target: https://pip.pypa.io/en/latest
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-pip is the `package installer`_ for Python. You can use pip to install packages from the `Python Package Index`_ and other indexes.
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-* `Usage`_
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-* `Release notes`_
-* `Release process`_
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-
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-
-* `Issue tracking`_
-* `Discourse channel`_
-* `User IRC`_
-
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-
-* `GitHub page`_
-* `Development documentation`_
-* `Development mailing list`_
-* `Development IRC`_
-
-Code of Conduct
---------------
-
-Everyone interacting in the pip project's codebases, issue trackers, chat
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-
-.. _package installer: https://packaging.python.org/guides/tool-recommendations/
-.. _Python Package Index: https://pypi.org
-.. _Installation: https://pip.pypa.io/en/stable/installation/
-.. _Usage: https://pip.pypa.io/en/stable/
-.. _Release notes: https://pip.pypa.io/en/stable/news.html
-.. _Release process: https://pip.pypa.io/en/latest/development/release-process/
-.. _GitHub page: https://github.com/pypa/pip
-.. _Development documentation: https://pip.pypa.io/en/latest/development
-.. _made a big improvement to the heart of pip: https://pyfound.blogspot.com/2020/11/pip-20-3-new-resolver.html
-.. _learn more: https://pip.pypa.io/en/latest/user_guide/#changes-to-the-pip-dependency-resolver-in-20-3-2020
-.. _sign up for our user experience research studies: https://pyfound.blogspot.com/2020/03/new-pip-resolver-to-roll-out-this-year.html
-.. _Python 2 support policy: https://pip.pypa.io/en/latest/development/release-process/#python-2-support
-.. _Issue tracking: https://github.com/pypa/pip/issues
-.. _Discourse channel: https://discuss.python.org/c/packaging
-.. _Development mailing list: https://mail.python.org/mailman3/lists/distutils-sig.python.org/
-.. _User IRC: https://kiwiirc.com/nextclient/#ircs://irc.libera.chat:+6697/pypa
-.. _Development IRC: https://kiwiirc.com/nextclient/#ircs://irc.libera.chat:+6697/pypa-dev
-.. _PSF Code of Conduct: https://github.com/pypa/.github/blob/main/CODE_OF_CONDUCT.md
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--- a/venv/Lib/site-packages/pip-21.2.4.dist-info/REQUESTED
+++ b/venv/Lib/site-packages/pip-21.2.4.dist-info/REQUESTED
--- a/venv/Lib/site-packages/pip-21.2.4.dist-info/WHEEL
+++ b/venv/Lib/site-packages/pip-21.2.4.dist-info/WHEEL
@@ -1,5 +0,0 @@
-Wheel-Version: 1.0
-Generator: bdist_wheel (0.36.2)
-Root-Is-Purelib: true
-Tag: py3-none-any
-
--- a/venv/Lib/site-packages/pip-21.2.4.dist-info/entry_points.txt
+++ b/venv/Lib/site-packages/pip-21.2.4.dist-info/entry_points.txt
@@ -1,5 +0,0 @@
-[console_scripts]
-pip = pip._internal.cli.main:main
-pip3 = pip._internal.cli.main:main
-pip3.9 = pip._internal.cli.main:main
-
--- a/venv/Lib/site-packages/pip-21.2.4.dist-info/top_level.txt
+++ b/venv/Lib/site-packages/pip-21.2.4.dist-info/top_level.txt
@@ -1 +0,0 @@
-pip
--- a/venv/Lib/site-packages/pip/init.py
+++ b/venv/Lib/site-packages/pip/init.py
@@ -1,6 +1,6 @@
 from typing import List, Optional

-__version__ = "21.2.4"
+__version__ = "23.1.2"


 def main(args: Optional[List[str]] = None) -> int:
--- a/venv/Lib/site-packages/pip/_internal/build_env.py
+++ b/venv/Lib/site-packages/pip/_internal/build_env.py
@@ -1,17 +1,15 @@
 """Build Environment used for isolation during sdist building
 """

-import contextlib
 import logging
 import os
 import pathlib
+import site
 import sys
 import textwrap
-import zipfile
 from collections import OrderedDict
-from sysconfig import get_paths
 from types import TracebackType
-from typing import TYPE_CHECKING, Iterable, Iterator, List, Optional, Set, Tuple, Type
+from typing import TYPE_CHECKING, Iterable, List, Optional, Set, Tuple, Type, Union

 from pip._vendor.certifi import where
 from pip._vendor.packaging.requirements import Requirement
@@ -19,8 +17,8 @@ from pip._vendor.packaging.version import Version

 from pip import __file__ as pip_location
 from pip._internal.cli.spinners import open_spinner
-from pip._internal.locations import get_platlib, get_prefixed_libs, get_purelib
-from pip._internal.metadata import get_environment
+from pip._internal.locations import get_platlib, get_purelib, get_scheme
+from pip._internal.metadata import get_default_environment, get_environment
 from pip._internal.utils.subprocess import call_subprocess
 from pip._internal.utils.temp_dir import TempDirectory, tempdir_kinds

@@ -30,62 +28,68 @@ if TYPE_CHECKING:
 logger = logging.getLogger(__name__)


-class _Prefix:
+def _dedup(a: str, b: str) -> Union[Tuple[str], Tuple[str, str]]:
+    return (a, b) if a != b else (a,)

-    def __init__(self, path):
-        # type: (str) -> None
+
+class _Prefix:
+    def __init__(self, path: str) -> None:
        self.path = path
        self.setup = False
-        self.bin_dir = get_paths(
-            'nt' if os.name == 'nt' else 'posix_prefix',
-            vars={'base': path, 'platbase': path}
-        )['scripts']
-        self.lib_dirs = get_prefixed_libs(path)
+        scheme = get_scheme("", prefix=path)
+        self.bin_dir = scheme.scripts
+        self.lib_dirs = _dedup(scheme.purelib, scheme.platlib)


-@contextlib.contextmanager
-def _create_standalone_pip() -> Iterator[str]:
-    """Create a "standalone pip" zip file.
+def get_runnable_pip() -> str:
+    """Get a file to pass to a Python executable, to run the currently-running pip.

-    The zip file's content is identical to the currently-running pip.
-    It will be used to install requirements into the build environment.
+    This is used to run a pip subprocess, for installing requirements into the build
+    environment.
    """
    source = pathlib.Path(pip_location).resolve().parent

-    # Return the current instance if `source` is not a directory. We can't build
-    # a zip from this, and it likely means the instance is already standalone.
    if not source.is_dir():
-        yield str(source)
-        return
+        # This would happen if someone is using pip from inside a zip file. In that
+        # case, we can use that directly.
+        return str(source)

-    with TempDirectory(kind="standalone-pip") as tmp_dir:
-        pip_zip = os.path.join(tmp_dir.path, "__env_pip__.zip")
-        kwargs = {}
-        if sys.version_info >= (3, 8):
-            kwargs["strict_timestamps"] = False
-        with zipfile.ZipFile(pip_zip, "w", **kwargs) as zf:
-            for child in source.rglob("*"):
-                zf.write(child, child.relative_to(source.parent).as_posix())
-        yield os.path.join(pip_zip, "pip")
+    return os.fsdecode(source / "__pip-runner__.py")
+
+
+def _get_system_sitepackages() -> Set[str]:
+    """Get system site packages
+
+    Usually from site.getsitepackages,
+    but fallback on `get_purelib()/get_platlib()` if unavailable
+    (e.g. in a virtualenv created by virtualenv<20)
+
+    Returns normalized set of strings.
+    """
+    if hasattr(site, "getsitepackages"):
+        system_sites = site.getsitepackages()
+    else:
+        # virtualenv < 20 overwrites site.py without getsitepackages
+        # fallback on get_purelib/get_platlib.
+        # this is known to miss things, but shouldn't in the cases
+        # where getsitepackages() has been removed (inside a virtualenv)
+        system_sites = [get_purelib(), get_platlib()]
+    return {os.path.normcase(path) for path in system_sites}


 class BuildEnvironment:
-    """Creates and manages an isolated environment to install build deps
-    """
+    """Creates and manages an isolated environment to install build deps"""

-    def __init__(self):
-        # type: () -> None
-        temp_dir = TempDirectory(
-            kind=tempdir_kinds.BUILD_ENV, globally_managed=True
-        )
+    def __init__(self) -> None:
+        temp_dir = TempDirectory(kind=tempdir_kinds.BUILD_ENV, globally_managed=True)

        self._prefixes = OrderedDict(
            (name, _Prefix(os.path.join(temp_dir.path, name)))
-            for name in ('normal', 'overlay')
+            for name in ("normal", "overlay")
        )

-        self._bin_dirs = []  # type: List[str]
-        self._lib_dirs = []  # type: List[str]
+        self._bin_dirs: List[str] = []
+        self._lib_dirs: List[str] = []
        for prefix in reversed(list(self._prefixes.values())):
            self._bin_dirs.append(prefix.bin_dir)
            self._lib_dirs.extend(prefix.lib_dirs)
@@ -93,15 +97,17 @@ class BuildEnvironment:
        # Customize site to:
        # - ensure .pth files are honored
        # - prevent access to system site packages
-        system_sites = {
-            os.path.normcase(site) for site in (get_purelib(), get_platlib())
-        }
-        self._site_dir = os.path.join(temp_dir.path, 'site')
+        system_sites = _get_system_sitepackages()
+
+        self._site_dir = os.path.join(temp_dir.path, "site")
        if not os.path.exists(self._site_dir):
            os.mkdir(self._site_dir)
-        with open(os.path.join(self._site_dir, 'sitecustomize.py'), 'w') as fp:
-            fp.write(textwrap.dedent(
-                '''
+        with open(
+            os.path.join(self._site_dir, "sitecustomize.py"), "w", encoding="utf-8"
+        ) as fp:
+            fp.write(
+                textwrap.dedent(
+                    """
                import os, site, sys

                # First, drop system-sites related paths.
@@ -124,44 +130,46 @@ class BuildEnvironment:
                for path in {lib_dirs!r}:
                    assert not path in sys.path
                    site.addsitedir(path)
-                '''
-            ).format(system_sites=system_sites, lib_dirs=self._lib_dirs))
+                """
+                ).format(system_sites=system_sites, lib_dirs=self._lib_dirs)
+            )

-    def __enter__(self):
-        # type: () -> None
+    def __enter__(self) -> None:
        self._save_env = {
            name: os.environ.get(name, None)
-            for name in ('PATH', 'PYTHONNOUSERSITE', 'PYTHONPATH')
+            for name in ("PATH", "PYTHONNOUSERSITE", "PYTHONPATH")
        }

        path = self._bin_dirs[:]
-        old_path = self._save_env['PATH']
+        old_path = self._save_env["PATH"]
        if old_path:
            path.extend(old_path.split(os.pathsep))

        pythonpath = [self._site_dir]

-        os.environ.update({
-            'PATH': os.pathsep.join(path),
-            'PYTHONNOUSERSITE': '1',
-            'PYTHONPATH': os.pathsep.join(pythonpath),
-        })
+        os.environ.update(
+            {
+                "PATH": os.pathsep.join(path),
+                "PYTHONNOUSERSITE": "1",
+                "PYTHONPATH": os.pathsep.join(pythonpath),
+            }
+        )

    def __exit__(
        self,
-        exc_type,  # type: Optional[Type[BaseException]]
-        exc_val,  # type: Optional[BaseException]
-        exc_tb  # type: Optional[TracebackType]
-    ):
-        # type: (...) -> None
+        exc_type: Optional[Type[BaseException]],
+        exc_val: Optional[BaseException],
+        exc_tb: Optional[TracebackType],
+    ) -> None:
        for varname, old_value in self._save_env.items():
            if old_value is None:
                os.environ.pop(varname, None)
            else:
                os.environ[varname] = old_value

-    def check_requirements(self, reqs):
-        # type: (Iterable[str]) -> Tuple[Set[Tuple[str, str]], Set[str]]
+    def check_requirements(
+        self, reqs: Iterable[str]
+    ) -> Tuple[Set[Tuple[str, str]], Set[str]]:
        """Return 2 sets:
        - conflicting requirements: set of (installed, wanted) reqs tuples
        - missing requirements: set of reqs
@@ -169,9 +177,17 @@ class BuildEnvironment:
        missing = set()
        conflicting = set()
        if reqs:
-            env = get_environment(self._lib_dirs)
+            env = (
+                get_environment(self._lib_dirs)
+                if hasattr(self, "_lib_dirs")
+                else get_default_environment()
+            )
            for req_str in reqs:
                req = Requirement(req_str)
+                # We're explicitly evaluating with an empty extra value, since build
+                # environments are not provided any mechanism to select specific extras.
+                if req.marker is not None and not req.marker.evaluate({"extra": ""}):
+                    continue
                dist = env.get_distribution(req.name)
                if not dist:
                    missing.add(req_str)
@@ -180,39 +196,30 @@ class BuildEnvironment:
                    installed_req_str = f"{req.name}=={dist.version}"
                else:
                    installed_req_str = f"{req.name}==={dist.version}"
-                if dist.version not in req.specifier:
+                if not req.specifier.contains(dist.version, prereleases=True):
                    conflicting.add((installed_req_str, req_str))
                # FIXME: Consider direct URL?
        return conflicting, missing

    def install_requirements(
        self,
-        finder,  # type: PackageFinder
-        requirements,  # type: Iterable[str]
-        prefix_as_string,  # type: str
-        message  # type: str
-    ):
-        # type: (...) -> None
+        finder: "PackageFinder",
+        requirements: Iterable[str],
+        prefix_as_string: str,
+        *,
+        kind: str,
+    ) -> None:
        prefix = self._prefixes[prefix_as_string]
        assert not prefix.setup
        prefix.setup = True
        if not requirements:
            return
-        with contextlib.ExitStack() as ctx:
-            # TODO: Remove this block when dropping 3.6 support. Python 3.6
-            # lacks importlib.resources and pep517 has issues loading files in
-            # a zip, so we fallback to the "old" method by adding the current
-            # pip directory to the child process's sys.path.
-            if sys.version_info < (3, 7):
-                pip_runnable = os.path.dirname(pip_location)
-            else:
-                pip_runnable = ctx.enter_context(_create_standalone_pip())
        self._install_requirements(
-                pip_runnable,
+            get_runnable_pip(),
            finder,
            requirements,
            prefix,
-                message,
+            kind=kind,
        )

    @staticmethod
@@ -221,74 +228,84 @@ class BuildEnvironment:
        finder: "PackageFinder",
        requirements: Iterable[str],
        prefix: _Prefix,
-        message: str,
+        *,
+        kind: str,
    ) -> None:
-        args = [
-            sys.executable, pip_runnable, 'install',
-            '--ignore-installed', '--no-user', '--prefix', prefix.path,
-            '--no-warn-script-location',
-        ]  # type: List[str]
+        args: List[str] = [
+            sys.executable,
+            pip_runnable,
+            "install",
+            "--ignore-installed",
+            "--no-user",
+            "--prefix",
+            prefix.path,
+            "--no-warn-script-location",
+        ]
        if logger.getEffectiveLevel() <= logging.DEBUG:
-            args.append('-v')
-        for format_control in ('no_binary', 'only_binary'):
+            args.append("-v")
+        for format_control in ("no_binary", "only_binary"):
            formats = getattr(finder.format_control, format_control)
-            args.extend(('--' + format_control.replace('_', '-'),
-                         ','.join(sorted(formats or {':none:'}))))
+            args.extend(
+                (
+                    "--" + format_control.replace("_", "-"),
+                    ",".join(sorted(formats or {":none:"})),
+                )
+            )

        index_urls = finder.index_urls
        if index_urls:
-            args.extend(['-i', index_urls[0]])
+            args.extend(["-i", index_urls[0]])
            for extra_index in index_urls[1:]:
-                args.extend(['--extra-index-url', extra_index])
+                args.extend(["--extra-index-url", extra_index])
        else:
-            args.append('--no-index')
+            args.append("--no-index")
        for link in finder.find_links:
-            args.extend(['--find-links', link])
+            args.extend(["--find-links", link])

        for host in finder.trusted_hosts:
-            args.extend(['--trusted-host', host])
+            args.extend(["--trusted-host", host])
        if finder.allow_all_prereleases:
-            args.append('--pre')
+            args.append("--pre")
        if finder.prefer_binary:
-            args.append('--prefer-binary')
-        args.append('--')
+            args.append("--prefer-binary")
+        args.append("--")
        args.extend(requirements)
        extra_environ = {"_PIP_STANDALONE_CERT": where()}
-        with open_spinner(message) as spinner:
-            call_subprocess(args, spinner=spinner, extra_environ=extra_environ)
+        with open_spinner(f"Installing {kind}") as spinner:
+            call_subprocess(
+                args,
+                command_desc=f"pip subprocess to install {kind}",
+                spinner=spinner,
+                extra_environ=extra_environ,
+            )


 class NoOpBuildEnvironment(BuildEnvironment):
-    """A no-op drop-in replacement for BuildEnvironment
-    """
+    """A no-op drop-in replacement for BuildEnvironment"""

-    def __init__(self):
-        # type: () -> None
+    def __init__(self) -> None:
        pass

-    def __enter__(self):
-        # type: () -> None
+    def __enter__(self) -> None:
        pass

    def __exit__(
        self,
-        exc_type,  # type: Optional[Type[BaseException]]
-        exc_val,  # type: Optional[BaseException]
-        exc_tb  # type: Optional[TracebackType]
-    ):
-        # type: (...) -> None
+        exc_type: Optional[Type[BaseException]],
+        exc_val: Optional[BaseException],
+        exc_tb: Optional[TracebackType],
+    ) -> None:
        pass

-    def cleanup(self):
-        # type: () -> None
+    def cleanup(self) -> None:
        pass

    def install_requirements(
        self,
-        finder,  # type: PackageFinder
-        requirements,  # type: Iterable[str]
-        prefix_as_string,  # type: str
-        message  # type: str
-    ):
-        # type: (...) -> None
+        finder: "PackageFinder",
+        requirements: Iterable[str],
+        prefix_as_string: str,
+        *,
+        kind: str,
+    ) -> None:
        raise NotImplementedError()
--- a/venv/Lib/site-packages/pip/_internal/cache.py
+++ b/venv/Lib/site-packages/pip/_internal/cache.py
@@ -5,13 +5,14 @@ import hashlib
 import json
 import logging
 import os
-from typing import Any, Dict, List, Optional, Set
+from pathlib import Path
+from typing import Any, Dict, List, Optional

 from pip._vendor.packaging.tags import Tag, interpreter_name, interpreter_version
 from pip._vendor.packaging.utils import canonicalize_name

 from pip._internal.exceptions import InvalidWheelFilename
-from pip._internal.models.format_control import FormatControl
+from pip._internal.models.direct_url import DirectUrl
 from pip._internal.models.link import Link
 from pip._internal.models.wheel import Wheel
 from pip._internal.utils.temp_dir import TempDirectory, tempdir_kinds
@@ -19,9 +20,10 @@ from pip._internal.utils.urls import path_to_url

 logger = logging.getLogger(__name__)

+ORIGIN_JSON_NAME = "origin.json"

-def _hash_dict(d):
-    # type: (Dict[str, str]) -> str
+
+def _hash_dict(d: Dict[str, str]) -> str:
    """Return a stable sha224 of a dictionary."""
    s = json.dumps(d, sort_keys=True, separators=(",", ":"), ensure_ascii=True)
    return hashlib.sha224(s.encode("ascii")).hexdigest()
@@ -30,29 +32,16 @@ def _hash_dict(d):
 class Cache:
    """An abstract class - provides cache directories for data from links

-
    :param cache_dir: The root of the cache.
-        :param format_control: An object of FormatControl class to limit
-            binaries being read from the cache.
-        :param allowed_formats: which formats of files the cache should store.
-            ('binary' and 'source' are the only allowed values)
    """

-    def __init__(self, cache_dir, format_control, allowed_formats):
-        # type: (str, FormatControl, Set[str]) -> None
+    def __init__(self, cache_dir: str) -> None:
        super().__init__()
        assert not cache_dir or os.path.isabs(cache_dir)
        self.cache_dir = cache_dir or None
-        self.format_control = format_control
-        self.allowed_formats = allowed_formats

-        _valid_formats = {"source", "binary"}
-        assert self.allowed_formats.union(_valid_formats) == _valid_formats
-
-    def _get_cache_path_parts(self, link):
-        # type: (Link) -> List[str]
-        """Get parts of part that must be os.path.joined with cache_dir
-        """
+    def _get_cache_path_parts(self, link: Link) -> List[str]:
+        """Get parts of part that must be os.path.joined with cache_dir"""

        # We want to generate an url to use as our cache key, we don't want to
        # just re-use the URL because it might have other items in the fragment
@@ -84,22 +73,11 @@ class Cache:

        return parts

-    def _get_candidates(self, link, canonical_package_name):
-        # type: (Link, str) -> List[Any]
-        can_not_cache = (
-            not self.cache_dir or
-            not canonical_package_name or
-            not link
-        )
+    def _get_candidates(self, link: Link, canonical_package_name: str) -> List[Any]:
+        can_not_cache = not self.cache_dir or not canonical_package_name or not link
        if can_not_cache:
            return []

-        formats = self.format_control.get_allowed_formats(
-            canonical_package_name
-        )
-        if not self.allowed_formats.intersection(formats):
-            return []
-
        candidates = []
        path = self.get_path_for_link(link)
        if os.path.isdir(path):
@@ -107,19 +85,16 @@ class Cache:
                candidates.append((candidate, path))
        return candidates

-    def get_path_for_link(self, link):
-        # type: (Link) -> str
-        """Return a directory to store cached items in for link.
-        """
+    def get_path_for_link(self, link: Link) -> str:
+        """Return a directory to store cached items in for link."""
        raise NotImplementedError()

    def get(
        self,
-        link,            # type: Link
-        package_name,    # type: Optional[str]
-        supported_tags,  # type: List[Tag]
-    ):
-        # type: (...) -> Link
+        link: Link,
+        package_name: Optional[str],
+        supported_tags: List[Tag],
+    ) -> Link:
        """Returns a link to a cached item if it exists, otherwise returns the
        passed link.
        """
@@ -127,15 +102,12 @@ class Cache:


 class SimpleWheelCache(Cache):
-    """A cache of wheels for future installs.
-    """
+    """A cache of wheels for future installs."""

-    def __init__(self, cache_dir, format_control):
-        # type: (str, FormatControl) -> None
-        super().__init__(cache_dir, format_control, {"binary"})
+    def __init__(self, cache_dir: str) -> None:
+        super().__init__(cache_dir)

-    def get_path_for_link(self, link):
-        # type: (Link) -> str
+    def get_path_for_link(self, link: Link) -> str:
        """Return a directory to store cached wheels for link

        Because there are M wheels for any one sdist, we provide a directory
@@ -157,20 +129,17 @@ class SimpleWheelCache(Cache):

    def get(
        self,
-        link,            # type: Link
-        package_name,    # type: Optional[str]
-        supported_tags,  # type: List[Tag]
-    ):
-        # type: (...) -> Link
+        link: Link,
+        package_name: Optional[str],
+        supported_tags: List[Tag],
+    ) -> Link:
        candidates = []

        if not package_name:
            return link

        canonical_package_name = canonicalize_name(package_name)
-        for wheel_name, wheel_dir in self._get_candidates(
-            link, canonical_package_name
-        ):
+        for wheel_name, wheel_dir in self._get_candidates(link, canonical_package_name):
            try:
                wheel = Wheel(wheel_name)
            except InvalidWheelFilename:
@@ -179,7 +148,9 @@ class SimpleWheelCache(Cache):
                logger.debug(
                    "Ignoring cached wheel %s for %s as it "
                    "does not match the expected distribution name %s.",
-                    wheel_name, link, package_name,
+                    wheel_name,
+                    link,
+                    package_name,
                )
                continue
            if not wheel.supported(supported_tags):
@@ -201,27 +172,29 @@ class SimpleWheelCache(Cache):


 class EphemWheelCache(SimpleWheelCache):
-    """A SimpleWheelCache that creates it's own temporary cache directory
-    """
+    """A SimpleWheelCache that creates it's own temporary cache directory"""

-    def __init__(self, format_control):
-        # type: (FormatControl) -> None
+    def __init__(self) -> None:
        self._temp_dir = TempDirectory(
            kind=tempdir_kinds.EPHEM_WHEEL_CACHE,
            globally_managed=True,
        )

-        super().__init__(self._temp_dir.path, format_control)
+        super().__init__(self._temp_dir.path)


 class CacheEntry:
    def __init__(
        self,
-        link,  # type: Link
-        persistent,  # type: bool
+        link: Link,
+        persistent: bool,
    ):
        self.link = link
        self.persistent = persistent
+        self.origin: Optional[DirectUrl] = None
+        origin_direct_url_path = Path(self.link.file_path).parent / ORIGIN_JSON_NAME
+        if origin_direct_url_path.exists():
+            self.origin = DirectUrl.from_json(origin_direct_url_path.read_text())


 class WheelCache(Cache):
@@ -231,27 +204,23 @@ class WheelCache(Cache):
    when a certain link is not found in the simple wheel cache first.
    """

-    def __init__(self, cache_dir, format_control):
-        # type: (str, FormatControl) -> None
-        super().__init__(cache_dir, format_control, {'binary'})
-        self._wheel_cache = SimpleWheelCache(cache_dir, format_control)
-        self._ephem_cache = EphemWheelCache(format_control)
+    def __init__(self, cache_dir: str) -> None:
+        super().__init__(cache_dir)
+        self._wheel_cache = SimpleWheelCache(cache_dir)
+        self._ephem_cache = EphemWheelCache()

-    def get_path_for_link(self, link):
-        # type: (Link) -> str
+    def get_path_for_link(self, link: Link) -> str:
        return self._wheel_cache.get_path_for_link(link)

-    def get_ephem_path_for_link(self, link):
-        # type: (Link) -> str
+    def get_ephem_path_for_link(self, link: Link) -> str:
        return self._ephem_cache.get_path_for_link(link)

    def get(
        self,
-        link,            # type: Link
-        package_name,    # type: Optional[str]
-        supported_tags,  # type: List[Tag]
-    ):
-        # type: (...) -> Link
+        link: Link,
+        package_name: Optional[str],
+        supported_tags: List[Tag],
+    ) -> Link:
        cache_entry = self.get_cache_entry(link, package_name, supported_tags)
        if cache_entry is None:
            return link
@@ -259,11 +228,10 @@ class WheelCache(Cache):

    def get_cache_entry(
        self,
-        link,            # type: Link
-        package_name,    # type: Optional[str]
-        supported_tags,  # type: List[Tag]
-    ):
-        # type: (...) -> Optional[CacheEntry]
+        link: Link,
+        package_name: Optional[str],
+        supported_tags: List[Tag],
+    ) -> Optional[CacheEntry]:
        """Returns a CacheEntry with a link to a cached item if it exists or
        None. The cache entry indicates if the item was found in the persistent
        or ephemeral cache.
@@ -285,3 +253,20 @@ class WheelCache(Cache):
            return CacheEntry(retval, persistent=False)

        return None
+
+    @staticmethod
+    def record_download_origin(cache_dir: str, download_info: DirectUrl) -> None:
+        origin_path = Path(cache_dir) / ORIGIN_JSON_NAME
+        if origin_path.is_file():
+            origin = DirectUrl.from_json(origin_path.read_text())
+            # TODO: use DirectUrl.equivalent when https://github.com/pypa/pip/pull/10564
+            # is merged.
+            if origin.url != download_info.url:
+                logger.warning(
+                    "Origin URL %s in cache entry %s does not match download URL %s. "
+                    "This is likely a pip bug or a cache corruption issue.",
+                    origin.url,
+                    cache_dir,
+                    download_info.url,
+                )
+        origin_path.write_text(download_info.to_json(), encoding="utf-8")
--- a/venv/Lib/site-packages/pip/_internal/cli/autocompletion.py
+++ b/venv/Lib/site-packages/pip/_internal/cli/autocompletion.py
@@ -59,6 +59,14 @@ def autocomplete() -> None:
                    print(dist)
                sys.exit(1)

+        should_list_installables = (
+            not current.startswith("-") and subcommand_name == "install"
+        )
+        if should_list_installables:
+            for path in auto_complete_paths(current, "path"):
+                print(path)
+            sys.exit(1)
+
        subcommand = create_command(subcommand_name)

        for opt in subcommand.parser.option_list_all:
@@ -138,7 +146,7 @@ def auto_complete_paths(current: str, completion_type: str) -> Iterable[str]:
    starting with ``current``.

    :param current: The word to be completed
-    :param completion_type: path completion type(`file`, `path` or `dir`)i
+    :param completion_type: path completion type(``file``, ``path`` or ``dir``)
    :return: A generator of regular files and/or directories
    """
    directory, filename = os.path.split(current)
--- a/venv/Lib/site-packages/pip/_internal/cli/base_command.py
+++ b/venv/Lib/site-packages/pip/_internal/cli/base_command.py
@@ -1,5 +1,6 @@
 """Base Command class, and related routines"""

+import functools
 import logging
 import logging.config
 import optparse
@@ -7,7 +8,9 @@ import os
 import sys
 import traceback
 from optparse import Values
-from typing import Any, List, Optional, Tuple
+from typing import Any, Callable, List, Optional, Tuple
+
+from pip._vendor.rich import traceback as rich_traceback

 from pip._internal.cli import cmdoptions
 from pip._internal.cli.command_context import CommandContextMixIn
@@ -21,12 +24,12 @@ from pip._internal.cli.status_codes import (
 from pip._internal.exceptions import (
    BadCommand,
    CommandError,
+    DiagnosticPipError,
    InstallationError,
    NetworkConnectionError,
    PreviousBuildDirError,
    UninstallationError,
 )
-from pip._internal.utils.deprecation import deprecated
 from pip._internal.utils.filesystem import check_path_owner
 from pip._internal.utils.logging import BrokenStdoutLoggingError, setup_logging
 from pip._internal.utils.misc import get_prog, normalize_path
@@ -85,10 +88,10 @@ class Command(CommandContextMixIn):
        # are present.
        assert not hasattr(options, "no_index")

-    def run(self, options: Values, args: List[Any]) -> int:
+    def run(self, options: Values, args: List[str]) -> int:
        raise NotImplementedError

-    def parse_args(self, args: List[str]) -> Tuple[Any, Any]:
+    def parse_args(self, args: List[str]) -> Tuple[Values, List[str]]:
        # factored out for testability
        return self.parser.parse_args(args)

@@ -119,6 +122,15 @@ class Command(CommandContextMixIn):
            user_log_file=options.log,
        )

+        always_enabled_features = set(options.features_enabled) & set(
+            cmdoptions.ALWAYS_ENABLED_FEATURES
+        )
+        if always_enabled_features:
+            logger.warning(
+                "The following features are always enabled: %s. ",
+                ", ".join(sorted(always_enabled_features)),
+            )
+
        # TODO: Try to get these passing down from the command?
        #       without resorting to os.environ to hold these.
        #       This also affects isolated builds and it should.
@@ -148,31 +160,20 @@ class Command(CommandContextMixIn):
                )
                options.cache_dir = None

-        if getattr(options, "build_dir", None):
-            deprecated(
-                reason=(
-                    "The -b/--build/--build-dir/--build-directory "
-                    "option is deprecated and has no effect anymore."
-                ),
-                replacement=(
-                    "use the TMPDIR/TEMP/TMP environment variable, "
-                    "possibly combined with --no-clean"
-                ),
-                gone_in="21.3",
-                issue=8333,
-            )
-
-        if "2020-resolver" in options.features_enabled:
-            logger.warning(
-                "--use-feature=2020-resolver no longer has any effect, "
-                "since it is now the default dependency resolver in pip. "
-                "This will become an error in pip 21.0."
-            )
-
+        def intercepts_unhandled_exc(
+            run_func: Callable[..., int]
+        ) -> Callable[..., int]:
+            @functools.wraps(run_func)
+            def exc_logging_wrapper(*args: Any) -> int:
                try:
-            status = self.run(options, args)
+                    status = run_func(*args)
                    assert isinstance(status, int)
                    return status
+                except DiagnosticPipError as exc:
+                    logger.error("[present-rich] %s", exc)
+                    logger.debug("Exception information:", exc_info=True)
+
+                    return ERROR
                except PreviousBuildDirError as exc:
                    logger.critical(str(exc))
                    logger.debug("Exception information:", exc_info=True)
@@ -194,8 +195,8 @@ class Command(CommandContextMixIn):

                    return ERROR
                except BrokenStdoutLoggingError:
-            # Bypass our logger and write any remaining messages to stderr
-            # because stdout no longer works.
+                    # Bypass our logger and write any remaining messages to
+                    # stderr because stdout no longer works.
                    print("ERROR: Pipe to stdout was broken", file=sys.stderr)
                    if level_number <= logging.DEBUG:
                        traceback.print_exc(file=sys.stderr)
@@ -210,5 +211,15 @@ class Command(CommandContextMixIn):
                    logger.critical("Exception:", exc_info=True)

                    return UNKNOWN_ERROR
+
+            return exc_logging_wrapper
+
+        try:
+            if not options.debug_mode:
+                run = intercepts_unhandled_exc(self.run)
+            else:
+                run = self.run
+                rich_traceback.install(show_locals=True)
+            return run(options, args)
        finally:
            self.handle_pip_version_check(options)
--- a/venv/Lib/site-packages/pip/_internal/cli/cmdoptions.py
+++ b/venv/Lib/site-packages/pip/_internal/cli/cmdoptions.py
@@ -10,9 +10,10 @@ pass on state. To be consistent, all options will follow this design.
 # The following comment should be removed at some point in the future.
 # mypy: strict-optional=False

+import importlib.util
+import logging
 import os
 import textwrap
-import warnings
 from functools import partial
 from optparse import SUPPRESS_HELP, Option, OptionGroup, OptionParser, Values
 from textwrap import dedent
@@ -21,7 +22,6 @@ from typing import Any, Callable, Dict, Optional, Tuple
 from pip._vendor.packaging.utils import canonicalize_name

 from pip._internal.cli.parser import ConfigOptionParser
-from pip._internal.cli.progress_bars import BAR_TYPES
 from pip._internal.exceptions import CommandError
 from pip._internal.locations import USER_CACHE_DIR, get_src_prefix
 from pip._internal.models.format_control import FormatControl
@@ -30,6 +30,8 @@ from pip._internal.models.target_python import TargetPython
 from pip._internal.utils.hashes import STRONG_HASHES
 from pip._internal.utils.misc import strtobool

+logger = logging.getLogger(__name__)
+

 def raise_option_error(parser: OptionParser, option: Option, msg: str) -> None:
    """
@@ -57,32 +59,6 @@ def make_option_group(group: Dict[str, Any], parser: ConfigOptionParser) -> Opti
    return option_group


-def check_install_build_global(
-    options: Values, check_options: Optional[Values] = None
-) -> None:
-    """Disable wheels if per-setup.py call options are set.
-
-    :param options: The OptionParser options to update.
-    :param check_options: The options to check, if not supplied defaults to
-        options.
-    """
-    if check_options is None:
-        check_options = options
-
-    def getname(n: str) -> Optional[Any]:
-        return getattr(check_options, n, None)
-
-    names = ["build_options", "global_options", "install_options"]
-    if any(map(getname, names)):
-        control = options.format_control
-        control.disallow_binaries()
-        warnings.warn(
-            "Disabling all use of wheels due to the use of --build-option "
-            "/ --global-option / --install-option.",
-            stacklevel=2,
-        )
-
-
 def check_dist_restriction(options: Values, check_target: bool = False) -> None:
    """Function for determining if custom platform options are allowed.

@@ -151,6 +127,18 @@ help_: Callable[..., Option] = partial(
    help="Show help.",
 )

+debug_mode: Callable[..., Option] = partial(
+    Option,
+    "--debug",
+    dest="debug_mode",
+    action="store_true",
+    default=False,
+    help=(
+        "Let unhandled exceptions propagate outside the main subroutine, "
+        "instead of logging them to stderr."
+    ),
+)
+
 isolated_mode: Callable[..., Option] = partial(
    Option,
    "--isolated",
@@ -165,13 +153,30 @@ isolated_mode: Callable[..., Option] = partial(

 require_virtualenv: Callable[..., Option] = partial(
    Option,
-    # Run only if inside a virtualenv, bail if not.
    "--require-virtualenv",
    "--require-venv",
    dest="require_venv",
    action="store_true",
    default=False,
-    help=SUPPRESS_HELP,
+    help=(
+        "Allow pip to only run in a virtual environment; "
+        "exit with an error otherwise."
+    ),
+)
+
+override_externally_managed: Callable[..., Option] = partial(
+    Option,
+    "--break-system-packages",
+    dest="override_externally_managed",
+    action="store_true",
+    help="Allow pip to modify an EXTERNALLY-MANAGED Python installation",
+)
+
+python: Callable[..., Option] = partial(
+    Option,
+    "--python",
+    dest="python",
+    help="Run pip with the specified Python interpreter.",
 )

 verbose: Callable[..., Option] = partial(
@@ -221,13 +226,9 @@ progress_bar: Callable[..., Option] = partial(
    "--progress-bar",
    dest="progress_bar",
    type="choice",
-    choices=list(BAR_TYPES.keys()),
+    choices=["on", "off"],
    default="on",
-    help=(
-        "Specify type of progress to be displayed ["
-        + "|".join(BAR_TYPES.keys())
-        + "] (default: %default)"
-    ),
+    help="Specify whether the progress bar should be used [on, off] (default: on)",
 )

 log: Callable[..., Option] = partial(
@@ -251,13 +252,26 @@ no_input: Callable[..., Option] = partial(
    help="Disable prompting for input.",
 )

+keyring_provider: Callable[..., Option] = partial(
+    Option,
+    "--keyring-provider",
+    dest="keyring_provider",
+    choices=["auto", "disabled", "import", "subprocess"],
+    default="auto",
+    help=(
+        "Enable the credential lookup via the keyring library if user input is allowed."
+        " Specify which mechanism to use [disabled, import, subprocess]."
+        " (default: disabled)"
+    ),
+)
+
 proxy: Callable[..., Option] = partial(
    Option,
    "--proxy",
    dest="proxy",
    type="str",
    default="",
-    help="Specify a proxy in the form [user:passwd@]proxy.server:port.",
+    help="Specify a proxy in the form scheme://[user:passwd@]proxy.server:port.",
 )

 retries: Callable[..., Option] = partial(
@@ -719,18 +733,6 @@ no_deps: Callable[..., Option] = partial(
    help="Don't install package dependencies.",
 )

-build_dir: Callable[..., Option] = partial(
-    PipOption,
-    "-b",
-    "--build",
-    "--build-dir",
-    "--build-directory",
-    dest="build_dir",
-    type="path",
-    metavar="dir",
-    help=SUPPRESS_HELP,
-)
-
 ignore_requires_python: Callable[..., Option] = partial(
    Option,
    "--ignore-requires-python",
@@ -750,6 +752,15 @@ no_build_isolation: Callable[..., Option] = partial(
    "if this option is used.",
 )

+check_build_deps: Callable[..., Option] = partial(
+    Option,
+    "--check-build-dependencies",
+    dest="check_build_deps",
+    action="store_true",
+    default=False,
+    help="Check the build dependencies when PEP517 is used.",
+)
+

 def _handle_no_use_pep517(
    option: Option, opt: str, value: str, parser: OptionParser
@@ -772,6 +783,16 @@ def _handle_no_use_pep517(
        """
        raise_option_error(parser, option=option, msg=msg)

+    # If user doesn't wish to use pep517, we check if setuptools and wheel are installed
+    # and raise error if it is not.
+    packages = ("setuptools", "wheel")
+    if not all(importlib.util.find_spec(package) for package in packages):
+        msg = (
+            f"It is not possible to use --no-use-pep517 "
+            f"without {' and '.join(packages)} installed."
+        )
+        raise_option_error(parser, option=option, msg=msg)
+
    # Otherwise, --no-use-pep517 was passed via the command-line.
    parser.values.use_pep517 = False

@@ -796,17 +817,38 @@ no_use_pep517: Any = partial(
    help=SUPPRESS_HELP,
 )

-install_options: Callable[..., Option] = partial(
+
+def _handle_config_settings(
+    option: Option, opt_str: str, value: str, parser: OptionParser
+) -> None:
+    key, sep, val = value.partition("=")
+    if sep != "=":
+        parser.error(f"Arguments to {opt_str} must be of the form KEY=VAL")  # noqa
+    dest = getattr(parser.values, option.dest)
+    if dest is None:
+        dest = {}
+        setattr(parser.values, option.dest, dest)
+    if key in dest:
+        if isinstance(dest[key], list):
+            dest[key].append(val)
+        else:
+            dest[key] = [dest[key], val]
+    else:
+        dest[key] = val
+
+
+config_settings: Callable[..., Option] = partial(
    Option,
-    "--install-option",
-    dest="install_options",
-    action="append",
-    metavar="options",
-    help="Extra arguments to be supplied to the setup.py install "
-    'command (use like --install-option="--install-scripts=/usr/local/'
-    'bin"). Use multiple --install-option options to pass multiple '
-    "options to setup.py install. If you are using an option with a "
-    "directory path, be sure to use absolute path.",
+    "-C",
+    "--config-settings",
+    dest="config_settings",
+    type=str,
+    action="callback",
+    callback=_handle_config_settings,
+    metavar="settings",
+    help="Configuration settings to be passed to the PEP 517 build backend. "
+    "Settings take the form KEY=VALUE. Use multiple --config-settings options "
+    "to pass multiple keys to the backend.",
 )

 build_options: Callable[..., Option] = partial(
@@ -855,6 +897,15 @@ disable_pip_version_check: Callable[..., Option] = partial(
    "of pip is available for download. Implied with --no-index.",
 )

+root_user_action: Callable[..., Option] = partial(
+    Option,
+    "--root-user-action",
+    dest="root_user_action",
+    default="warn",
+    choices=["warn", "ignore"],
+    help="Action if pip is run as a root user. By default, a warning message is shown.",
+)
+

 def _handle_merge_hash(
    option: Option, opt_str: str, value: str, parser: OptionParser
@@ -943,6 +994,11 @@ no_python_version_warning: Callable[..., Option] = partial(
 )


+# Features that are now always on. A warning is printed if they are used.
+ALWAYS_ENABLED_FEATURES = [
+    "no-binary-enable-wheel-cache",  # always on since 23.1
+]
+
 use_new_feature: Callable[..., Option] = partial(
    Option,
    "--use-feature",
@@ -950,7 +1006,11 @@ use_new_feature: Callable[..., Option] = partial(
    metavar="feature",
    action="append",
    default=[],
-    choices=["2020-resolver", "fast-deps", "in-tree-build"],
+    choices=[
+        "fast-deps",
+        "truststore",
+    ]
+    + ALWAYS_ENABLED_FEATURES,
    help="Enable new functionality, that may be backward incompatible.",
 )

@@ -961,7 +1021,9 @@ use_deprecated_feature: Callable[..., Option] = partial(
    metavar="feature",
    action="append",
    default=[],
-    choices=["legacy-resolver"],
+    choices=[
+        "legacy-resolver",
+    ],
    help=("Enable deprecated functionality, that will be removed in the future."),
 )

@@ -974,13 +1036,16 @@ general_group: Dict[str, Any] = {
    "name": "General Options",
    "options": [
        help_,
+        debug_mode,
        isolated_mode,
        require_virtualenv,
+        python,
        verbose,
        version,
        quiet,
        log,
        no_input,
+        keyring_provider,
        proxy,
        retries,
        timeout,
--- a/venv/Lib/site-packages/pip/_internal/cli/command_context.py
+++ b/venv/Lib/site-packages/pip/_internal/cli/command_context.py
@@ -1,5 +1,5 @@
 from contextlib import ExitStack, contextmanager
-from typing import ContextManager, Iterator, TypeVar
+from typing import ContextManager, Generator, TypeVar

 _T = TypeVar("_T", covariant=True)

@@ -11,7 +11,7 @@ class CommandContextMixIn:
        self._main_context = ExitStack()

    @contextmanager
-    def main_context(self) -> Iterator[None]:
+    def main_context(self) -> Generator[None, None, None]:
        assert not self._in_main_context

        self._in_main_context = True
--- a/venv/Lib/site-packages/pip/_internal/cli/main.py
+++ b/venv/Lib/site-packages/pip/_internal/cli/main.py
@@ -4,6 +4,7 @@ import locale
 import logging
 import os
 import sys
+import warnings
 from typing import List, Optional

 from pip._internal.cli.autocompletion import autocomplete
@@ -46,6 +47,14 @@ def main(args: Optional[List[str]] = None) -> int:
    if args is None:
        args = sys.argv[1:]

+    # Suppress the pkg_resources deprecation warning
+    # Note - we use a module of .*pkg_resources to cover
+    # the normal case (pip._vendor.pkg_resources) and the
+    # devendored case (a bare pkg_resources)
+    warnings.filterwarnings(
+        action="ignore", category=DeprecationWarning, module=".*pkg_resources"
+    )
+
    # Configure our deprecation warnings to be sent through loggers
    deprecation.install_warning_logger()

--- a/venv/Lib/site-packages/pip/_internal/cli/main_parser.py
+++ b/venv/Lib/site-packages/pip/_internal/cli/main_parser.py
@@ -2,9 +2,11 @@
 """

 import os
+import subprocess
 import sys
-from typing import List, Tuple
+from typing import List, Optional, Tuple

+from pip._internal.build_env import get_runnable_pip
 from pip._internal.cli import cmdoptions
 from pip._internal.cli.parser import ConfigOptionParser, UpdatingDefaultsHelpFormatter
 from pip._internal.commands import commands_dict, get_similar_commands
@@ -45,6 +47,25 @@ def create_main_parser() -> ConfigOptionParser:
    return parser


+def identify_python_interpreter(python: str) -> Optional[str]:
+    # If the named file exists, use it.
+    # If it's a directory, assume it's a virtual environment and
+    # look for the environment's Python executable.
+    if os.path.exists(python):
+        if os.path.isdir(python):
+            # bin/python for Unix, Scripts/python.exe for Windows
+            # Try both in case of odd cases like cygwin.
+            for exe in ("bin/python", "Scripts/python.exe"):
+                py = os.path.join(python, exe)
+                if os.path.exists(py):
+                    return py
+        else:
+            return python
+
+    # Could not find the interpreter specified
+    return None
+
+
 def parse_command(args: List[str]) -> Tuple[str, List[str]]:
    parser = create_main_parser()

@@ -57,6 +78,32 @@ def parse_command(args: List[str]) -> Tuple[str, List[str]]:
    #  args_else: ['install', '--user', 'INITools']
    general_options, args_else = parser.parse_args(args)

+    # --python
+    if general_options.python and "_PIP_RUNNING_IN_SUBPROCESS" not in os.environ:
+        # Re-invoke pip using the specified Python interpreter
+        interpreter = identify_python_interpreter(general_options.python)
+        if interpreter is None:
+            raise CommandError(
+                f"Could not locate Python interpreter {general_options.python}"
+            )
+
+        pip_cmd = [
+            interpreter,
+            get_runnable_pip(),
+        ]
+        pip_cmd.extend(args)
+
+        # Set a flag so the child doesn't re-invoke itself, causing
+        # an infinite loop.
+        os.environ["_PIP_RUNNING_IN_SUBPROCESS"] = "1"
+        returncode = 0
+        try:
+            proc = subprocess.run(pip_cmd)
+            returncode = proc.returncode
+        except (subprocess.SubprocessError, OSError) as exc:
+            raise CommandError(f"Failed to run pip under {interpreter}: {exc}")
+        sys.exit(returncode)
+
    # --version
    if general_options.version:
        sys.stdout.write(parser.version)
--- a/venv/Lib/site-packages/pip/_internal/cli/parser.py
+++ b/venv/Lib/site-packages/pip/_internal/cli/parser.py
@@ -6,7 +6,7 @@ import shutil
 import sys
 import textwrap
 from contextlib import suppress
-from typing import Any, Dict, Iterator, List, Tuple
+from typing import Any, Dict, Generator, List, Tuple

 from pip._internal.cli.status_codes import UNKNOWN_ERROR
 from pip._internal.configuration import Configuration, ConfigurationError
@@ -175,7 +175,9 @@ class ConfigOptionParser(CustomOptionParser):
            print(f"An error occurred during configuration: {exc}")
            sys.exit(3)

-    def _get_ordered_configuration_items(self) -> Iterator[Tuple[str, Any]]:
+    def _get_ordered_configuration_items(
+        self,
+    ) -> Generator[Tuple[str, Any], None, None]:
        # Configuration gives keys in an unordered manner. Order them.
        override_order = ["global", self.name, ":env:"]

--- a/venv/Lib/site-packages/pip/_internal/cli/progress_bars.py
+++ b/venv/Lib/site-packages/pip/_internal/cli/progress_bars.py
@@ -1,250 +1,68 @@
-import itertools
-import sys
-from signal import SIGINT, default_int_handler, signal
-from typing import Any
+import functools
+from typing import Callable, Generator, Iterable, Iterator, Optional, Tuple

-from pip._vendor.progress.bar import Bar, FillingCirclesBar, IncrementalBar
-from pip._vendor.progress.spinner import Spinner
-
-from pip._internal.utils.compat import WINDOWS
-from pip._internal.utils.logging import get_indentation
-from pip._internal.utils.misc import format_size
-
-try:
-    from pip._vendor import colorama
-# Lots of different errors can come from this, including SystemError and
-# ImportError.
-except Exception:
-    colorama = None
-
-
-def _select_progress_class(preferred: Bar, fallback: Bar) -> Bar:
-    encoding = getattr(preferred.file, "encoding", None)
-
-    # If we don't know what encoding this file is in, then we'll just assume
-    # that it doesn't support unicode and use the ASCII bar.
-    if not encoding:
-        return fallback
-
-    # Collect all of the possible characters we want to use with the preferred
-    # bar.
-    characters = [
-        getattr(preferred, "empty_fill", ""),
-        getattr(preferred, "fill", ""),
-    ]
-    characters += list(getattr(preferred, "phases", []))
-
-    # Try to decode the characters we're using for the bar using the encoding
-    # of the given file, if this works then we'll assume that we can use the
-    # fancier bar and if not we'll fall back to the plaintext bar.
-    try:
-        "".join(characters).encode(encoding)
-    except UnicodeEncodeError:
-        return fallback
-    else:
-        return preferred
-
-
-_BaseBar: Any = _select_progress_class(IncrementalBar, Bar)
-
-
-class InterruptibleMixin:
-    """
-    Helper to ensure that self.finish() gets called on keyboard interrupt.
-
-    This allows downloads to be interrupted without leaving temporary state
-    (like hidden cursors) behind.
-
-    This class is similar to the progress library's existing SigIntMixin
-    helper, but as of version 1.2, that helper has the following problems:
-
-    1. It calls sys.exit().
-    2. It discards the existing SIGINT handler completely.
-    3. It leaves its own handler in place even after an uninterrupted finish,
-       which will have unexpected delayed effects if the user triggers an
-       unrelated keyboard interrupt some time after a progress-displaying
-       download has already completed, for example.
-    """
-
-    def __init__(self, *args: Any, **kwargs: Any) -> None:
-        """
-        Save the original SIGINT handler for later.
-        """
-        # https://github.com/python/mypy/issues/5887
-        super().__init__(*args, **kwargs)  # type: ignore
-
-        self.original_handler = signal(SIGINT, self.handle_sigint)
-
-        # If signal() returns None, the previous handler was not installed from
-        # Python, and we cannot restore it. This probably should not happen,
-        # but if it does, we must restore something sensible instead, at least.
-        # The least bad option should be Python's default SIGINT handler, which
-        # just raises KeyboardInterrupt.
-        if self.original_handler is None:
-            self.original_handler = default_int_handler
-
-    def finish(self) -> None:
-        """
-        Restore the original SIGINT handler after finishing.
-
-        This should happen regardless of whether the progress display finishes
-        normally, or gets interrupted.
-        """
-        super().finish()  # type: ignore
-        signal(SIGINT, self.original_handler)
-
-    def handle_sigint(self, signum, frame):  # type: ignore
-        """
-        Call self.finish() before delegating to the original SIGINT handler.
-
-        This handler should only be in place while the progress display is
-        active.
-        """
-        self.finish()
-        self.original_handler(signum, frame)
-
-
-class SilentBar(Bar):
-    def update(self) -> None:
-        pass
-
-
-class BlueEmojiBar(IncrementalBar):
-
-    suffix = "%(percent)d%%"
-    bar_prefix = " "
-    bar_suffix = " "
-    phases = ("\U0001F539", "\U0001F537", "\U0001F535")
-
-
-class DownloadProgressMixin:
-    def __init__(self, *args: Any, **kwargs: Any) -> None:
-        # https://github.com/python/mypy/issues/5887
-        super().__init__(*args, **kwargs)  # type: ignore
-        self.message: str = (" " * (get_indentation() + 2)) + self.message
-
-    @property
-    def downloaded(self) -> str:
-        return format_size(self.index)  # type: ignore
-
-    @property
-    def download_speed(self) -> str:
-        # Avoid zero division errors...
-        if self.avg == 0.0:  # type: ignore
-            return "..."
-        return format_size(1 / self.avg) + "/s"  # type: ignore
-
-    @property
-    def pretty_eta(self) -> str:
-        if self.eta:  # type: ignore
-            return f"eta {self.eta_td}"  # type: ignore
-        return ""
-
-    def iter(self, it):  # type: ignore
-        for x in it:
-            yield x
-            # B305 is incorrectly raised here
-            # https://github.com/PyCQA/flake8-bugbear/issues/59
-            self.next(len(x))  # noqa: B305
-        self.finish()
-
-
-class WindowsMixin:
-    def __init__(self, *args: Any, **kwargs: Any) -> None:
-        # The Windows terminal does not support the hide/show cursor ANSI codes
-        # even with colorama. So we'll ensure that hide_cursor is False on
-        # Windows.
-        # This call needs to go before the super() call, so that hide_cursor
-        # is set in time. The base progress bar class writes the "hide cursor"
-        # code to the terminal in its init, so if we don't set this soon
-        # enough, we get a "hide" with no corresponding "show"...
-        if WINDOWS and self.hide_cursor:  # type: ignore
-            self.hide_cursor = False
-
-        # https://github.com/python/mypy/issues/5887
-        super().__init__(*args, **kwargs)  # type: ignore
-
-        # Check if we are running on Windows and we have the colorama module,
-        # if we do then wrap our file with it.
-        if WINDOWS and colorama:
-            self.file = colorama.AnsiToWin32(self.file)  # type: ignore
-            # The progress code expects to be able to call self.file.isatty()
-            # but the colorama.AnsiToWin32() object doesn't have that, so we'll
-            # add it.
-            self.file.isatty = lambda: self.file.wrapped.isatty()
-            # The progress code expects to be able to call self.file.flush()
-            # but the colorama.AnsiToWin32() object doesn't have that, so we'll
-            # add it.
-            self.file.flush = lambda: self.file.wrapped.flush()
-
-
-class BaseDownloadProgressBar(WindowsMixin, InterruptibleMixin, DownloadProgressMixin):
-
-    file = sys.stdout
-    message = "%(percent)d%%"
-    suffix = "%(downloaded)s %(download_speed)s %(pretty_eta)s"
-
-
-class DefaultDownloadProgressBar(BaseDownloadProgressBar, _BaseBar):
-    pass
-
-
-class DownloadSilentBar(BaseDownloadProgressBar, SilentBar):
-    pass
-
-
-class DownloadBar(BaseDownloadProgressBar, Bar):
-    pass
-
-
-class DownloadFillingCirclesBar(BaseDownloadProgressBar, FillingCirclesBar):
-    pass
-
-
-class DownloadBlueEmojiProgressBar(BaseDownloadProgressBar, BlueEmojiBar):
-    pass
-
-
-class DownloadProgressSpinner(
-    WindowsMixin, InterruptibleMixin, DownloadProgressMixin, Spinner
-):
-
-    file = sys.stdout
-    suffix = "%(downloaded)s %(download_speed)s"
-
-    def next_phase(self) -> str:
-        if not hasattr(self, "_phaser"):
-            self._phaser = itertools.cycle(self.phases)
-        return next(self._phaser)
-
-    def update(self) -> None:
-        message = self.message % self
-        phase = self.next_phase()
-        suffix = self.suffix % self
-        line = "".join(
-            [
-                message,
-                " " if message else "",
-                phase,
-                " " if suffix else "",
-                suffix,
-            ]
+from pip._vendor.rich.progress import (
+    BarColumn,
+    DownloadColumn,
+    FileSizeColumn,
+    Progress,
+    ProgressColumn,
+    SpinnerColumn,
+    TextColumn,
+    TimeElapsedColumn,
+    TimeRemainingColumn,
+    TransferSpeedColumn,
 )

-        self.writeln(line)
+from pip._internal.utils.logging import get_indentation
+
+DownloadProgressRenderer = Callable[[Iterable[bytes]], Iterator[bytes]]


-BAR_TYPES = {
-    "off": (DownloadSilentBar, DownloadSilentBar),
-    "on": (DefaultDownloadProgressBar, DownloadProgressSpinner),
-    "ascii": (DownloadBar, DownloadProgressSpinner),
-    "pretty": (DownloadFillingCirclesBar, DownloadProgressSpinner),
-    "emoji": (DownloadBlueEmojiProgressBar, DownloadProgressSpinner),
-}
+def _rich_progress_bar(
+    iterable: Iterable[bytes],
+    *,
+    bar_type: str,
+    size: int,
+) -> Generator[bytes, None, None]:
+    assert bar_type == "on", "This should only be used in the default mode."

-
-def DownloadProgressProvider(progress_bar, max=None):  # type: ignore
-    if max is None or max == 0:
-        return BAR_TYPES[progress_bar][1]().iter
+    if not size:
+        total = float("inf")
+        columns: Tuple[ProgressColumn, ...] = (
+            TextColumn("[progress.description]{task.description}"),
+            SpinnerColumn("line", speed=1.5),
+            FileSizeColumn(),
+            TransferSpeedColumn(),
+            TimeElapsedColumn(),
+        )
    else:
-        return BAR_TYPES[progress_bar][0](max=max).iter
+        total = size
+        columns = (
+            TextColumn("[progress.description]{task.description}"),
+            BarColumn(),
+            DownloadColumn(),
+            TransferSpeedColumn(),
+            TextColumn("eta"),
+            TimeRemainingColumn(),
+        )
+
+    progress = Progress(*columns, refresh_per_second=30)
+    task_id = progress.add_task(" " * (get_indentation() + 2), total=total)
+    with progress:
+        for chunk in iterable:
+            yield chunk
+            progress.update(task_id, advance=len(chunk))
+
+
+def get_download_progress_renderer(
+    *, bar_type: str, size: Optional[int] = None
+) -> DownloadProgressRenderer:
+    """Get an object that can be used to render the download progress.
+
+    Returns a callable, that takes an iterable to "wrap".
+    """
+    if bar_type == "on":
+        return functools.partial(_rich_progress_bar, bar_type=bar_type, size=size)
+    else:
+        return iter  # no-op, when passed an iterator
--- a/venv/Lib/site-packages/pip/_internal/cli/req_command.py
+++ b/venv/Lib/site-packages/pip/_internal/cli/req_command.py
@@ -10,7 +10,7 @@ import os
 import sys
 from functools import partial
 from optparse import Values
-from typing import Any, List, Optional, Tuple
+from typing import TYPE_CHECKING, Any, List, Optional, Tuple

 from pip._internal.cache import WheelCache
 from pip._internal.cli import cmdoptions
@@ -22,6 +22,7 @@ from pip._internal.index.package_finder import PackageFinder
 from pip._internal.models.selection_prefs import SelectionPreferences
 from pip._internal.models.target_python import TargetPython
 from pip._internal.network.session import PipSession
+from pip._internal.operations.build.build_tracker import BuildTracker
 from pip._internal.operations.prepare import RequirementPreparer
 from pip._internal.req.constructors import (
    install_req_from_editable,
@@ -31,7 +32,6 @@ from pip._internal.req.constructors import (
 )
 from pip._internal.req.req_file import parse_requirements
 from pip._internal.req.req_install import InstallRequirement
-from pip._internal.req.req_tracker import RequirementTracker
 from pip._internal.resolution.base import BaseResolver
 from pip._internal.self_outdated_check import pip_self_version_check
 from pip._internal.utils.temp_dir import (
@@ -41,9 +41,33 @@ from pip._internal.utils.temp_dir import (
 )
 from pip._internal.utils.virtualenv import running_under_virtualenv

+if TYPE_CHECKING:
+    from ssl import SSLContext
+
 logger = logging.getLogger(__name__)


+def _create_truststore_ssl_context() -> Optional["SSLContext"]:
+    if sys.version_info < (3, 10):
+        raise CommandError("The truststore feature is only available for Python 3.10+")
+
+    try:
+        import ssl
+    except ImportError:
+        logger.warning("Disabling truststore since ssl support is missing")
+        return None
+
+    try:
+        import truststore
+    except ImportError:
+        raise CommandError(
+            "To use the truststore feature, 'truststore' must be installed into "
+            "pip's current environment."
+        )
+
+    return truststore.SSLContext(ssl.PROTOCOL_TLS_CLIENT)
+
+
 class SessionCommandMixin(CommandContextMixIn):

    """
@@ -83,15 +107,27 @@ class SessionCommandMixin(CommandContextMixIn):
        options: Values,
        retries: Optional[int] = None,
        timeout: Optional[int] = None,
+        fallback_to_certifi: bool = False,
    ) -> PipSession:
-        assert not options.cache_dir or os.path.isabs(options.cache_dir)
+        cache_dir = options.cache_dir
+        assert not cache_dir or os.path.isabs(cache_dir)
+
+        if "truststore" in options.features_enabled:
+            try:
+                ssl_context = _create_truststore_ssl_context()
+            except Exception:
+                if not fallback_to_certifi:
+                    raise
+                ssl_context = None
+        else:
+            ssl_context = None
+
        session = PipSession(
-            cache=(
-                os.path.join(options.cache_dir, "http") if options.cache_dir else None
-            ),
+            cache=os.path.join(cache_dir, "http") if cache_dir else None,
            retries=retries if retries is not None else options.retries,
            trusted_hosts=options.trusted_hosts,
            index_urls=self._get_index_urls(options),
+            ssl_context=ssl_context,
        )

        # Handle custom ca-bundles from the user
@@ -115,6 +151,7 @@ class SessionCommandMixin(CommandContextMixIn):

        # Determine if we can prompt the user for authentication or not
        session.auth.prompting = not options.no_input
+        session.auth.keyring_provider = options.keyring_provider

        return session

@@ -141,7 +178,14 @@ class IndexGroupCommand(Command, SessionCommandMixin):

        # Otherwise, check if we're using the latest version of pip available.
        session = self._build_session(
-            options, retries=0, timeout=min(5, options.timeout)
+            options,
+            retries=0,
+            timeout=min(5, options.timeout),
+            # This is set to ensure the function does not fail when truststore is
+            # specified in use-feature but cannot be loaded. This usually raises a
+            # CommandError and shows a nice user-facing error, but this function is not
+            # called in that try-except block.
+            fallback_to_certifi=True,
        )
        with session:
            pip_self_version_check(session, options)
@@ -172,9 +216,10 @@ def warn_if_run_as_root() -> None:
    # checks: https://mypy.readthedocs.io/en/stable/common_issues.html
    if sys.platform == "win32" or sys.platform == "cygwin":
        return
-    if sys.platform == "darwin" or sys.platform == "linux":
+
    if os.getuid() != 0:
        return
+
    logger.warning(
        "Running pip as the 'root' user can result in broken permissions and "
        "conflicting behaviour with the system package manager. "
@@ -230,11 +275,12 @@ class RequirementCommand(IndexGroupCommand):
        cls,
        temp_build_dir: TempDirectory,
        options: Values,
-        req_tracker: RequirementTracker,
+        build_tracker: BuildTracker,
        session: PipSession,
        finder: PackageFinder,
        use_user_site: bool,
        download_dir: Optional[str] = None,
+        verbosity: int = 0,
    ) -> RequirementPreparer:
        """
        Create a RequirementPreparer instance for the given parameters.
@@ -265,14 +311,15 @@ class RequirementCommand(IndexGroupCommand):
            src_dir=options.src_dir,
            download_dir=download_dir,
            build_isolation=options.build_isolation,
-            req_tracker=req_tracker,
+            check_build_deps=options.check_build_deps,
+            build_tracker=build_tracker,
            session=session,
            progress_bar=options.progress_bar,
            finder=finder,
            require_hashes=options.require_hashes,
            use_user_site=use_user_site,
            lazy_wheel=lazy_wheel,
-            in_tree_build="in-tree-build" in options.features_enabled,
+            verbosity=verbosity,
        )

    @classmethod
@@ -363,10 +410,11 @@ class RequirementCommand(IndexGroupCommand):
        for req in args:
            req_to_add = install_req_from_line(
                req,
-                None,
+                comes_from=None,
                isolated=options.isolated_mode,
                use_pep517=options.use_pep517,
                user_supplied=True,
+                config_settings=getattr(options, "config_settings", None),
            )
            requirements.append(req_to_add)

@@ -376,6 +424,7 @@ class RequirementCommand(IndexGroupCommand):
                user_supplied=True,
                isolated=options.isolated_mode,
                use_pep517=options.use_pep517,
+                config_settings=getattr(options, "config_settings", None),
            )
            requirements.append(req_to_add)

@@ -389,6 +438,9 @@ class RequirementCommand(IndexGroupCommand):
                    isolated=options.isolated_mode,
                    use_pep517=options.use_pep517,
                    user_supplied=True,
+                    config_settings=parsed_req.options.get("config_settings")
+                    if parsed_req.options
+                    else None,
                )
                requirements.append(req_to_add)

--- a/venv/Lib/site-packages/pip/_internal/cli/spinners.py
+++ b/venv/Lib/site-packages/pip/_internal/cli/spinners.py
@@ -3,9 +3,7 @@ import itertools
 import logging
 import sys
 import time
-from typing import IO, Iterator
-
-from pip._vendor.progress import HIDE_CURSOR, SHOW_CURSOR
+from typing import IO, Generator, Optional

 from pip._internal.utils.compat import WINDOWS
 from pip._internal.utils.logging import get_indentation
@@ -25,7 +23,7 @@ class InteractiveSpinner(SpinnerInterface):
    def __init__(
        self,
        message: str,
-        file: IO[str] = None,
+        file: Optional[IO[str]] = None,
        spin_chars: str = "-\\|/",
        # Empirically, 8 updates/second looks nice
        min_update_interval_seconds: float = 0.125,
@@ -115,7 +113,7 @@ class RateLimiter:


@contextlib.contextmanager
-def open_spinner(message: str) -> Iterator[SpinnerInterface]:
+def open_spinner(message: str) -> Generator[SpinnerInterface, None, None]:
    # Interactive spinner goes directly to sys.stdout rather than being routed
    # through the logging system, but it acts like it has level INFO,
    # i.e. it's only displayed if we're at level INFO or better.
@@ -138,8 +136,12 @@ def open_spinner(message: str) -> Iterator[SpinnerInterface]:
        spinner.finish("done")


+HIDE_CURSOR = "\x1b[?25l"
+SHOW_CURSOR = "\x1b[?25h"
+
+
@contextlib.contextmanager
-def hidden_cursor(file: IO[str]) -> Iterator[None]:
+def hidden_cursor(file: IO[str]) -> Generator[None, None, None]:
    # The Windows terminal does not support the hide/show cursor ANSI codes,
    # even via colorama. So don't even try.
    if WINDOWS:
--- a/venv/Lib/site-packages/pip/_internal/commands/init.py
+++ b/venv/Lib/site-packages/pip/_internal/commands/init.py
@@ -3,87 +3,107 @@ Package containing all pip commands
 """

 import importlib
-from collections import OrderedDict, namedtuple
+from collections import namedtuple
 from typing import Any, Dict, Optional

 from pip._internal.cli.base_command import Command

-CommandInfo = namedtuple('CommandInfo', 'module_path, class_name, summary')
+CommandInfo = namedtuple("CommandInfo", "module_path, class_name, summary")

-# The ordering matters for help display.
-#    Also, even though the module path starts with the same
-# "pip._internal.commands" prefix in each case, we include the full path
-# because it makes testing easier (specifically when modifying commands_dict
-# in test setup / teardown by adding info for a FakeCommand class defined
-# in a test-related module).
-#    Finally, we need to pass an iterable of pairs here rather than a dict
-# so that the ordering won't be lost when using Python 2.7.
-commands_dict: Dict[str, CommandInfo] = OrderedDict([
-    ('install', CommandInfo(
-        'pip._internal.commands.install', 'InstallCommand',
-        'Install packages.',
-    )),
-    ('download', CommandInfo(
-        'pip._internal.commands.download', 'DownloadCommand',
-        'Download packages.',
-    )),
-    ('uninstall', CommandInfo(
-        'pip._internal.commands.uninstall', 'UninstallCommand',
-        'Uninstall packages.',
-    )),
-    ('freeze', CommandInfo(
-        'pip._internal.commands.freeze', 'FreezeCommand',
-        'Output installed packages in requirements format.',
-    )),
-    ('list', CommandInfo(
-        'pip._internal.commands.list', 'ListCommand',
-        'List installed packages.',
-    )),
-    ('show', CommandInfo(
-        'pip._internal.commands.show', 'ShowCommand',
-        'Show information about installed packages.',
-    )),
-    ('check', CommandInfo(
-        'pip._internal.commands.check', 'CheckCommand',
-        'Verify installed packages have compatible dependencies.',
-    )),
-    ('config', CommandInfo(
-        'pip._internal.commands.configuration', 'ConfigurationCommand',
-        'Manage local and global configuration.',
-    )),
-    ('search', CommandInfo(
-        'pip._internal.commands.search', 'SearchCommand',
-        'Search PyPI for packages.',
-    )),
-    ('cache', CommandInfo(
-        'pip._internal.commands.cache', 'CacheCommand',
+# This dictionary does a bunch of heavy lifting for help output:
+# - Enables avoiding additional (costly) imports for presenting `--help`.
+# - The ordering matters for help display.
+#
+# Even though the module path starts with the same "pip._internal.commands"
+# prefix, the full path makes testing easier (specifically when modifying
+# `commands_dict` in test setup / teardown).
+commands_dict: Dict[str, CommandInfo] = {
+    "install": CommandInfo(
+        "pip._internal.commands.install",
+        "InstallCommand",
+        "Install packages.",
+    ),
+    "download": CommandInfo(
+        "pip._internal.commands.download",
+        "DownloadCommand",
+        "Download packages.",
+    ),
+    "uninstall": CommandInfo(
+        "pip._internal.commands.uninstall",
+        "UninstallCommand",
+        "Uninstall packages.",
+    ),
+    "freeze": CommandInfo(
+        "pip._internal.commands.freeze",
+        "FreezeCommand",
+        "Output installed packages in requirements format.",
+    ),
+    "inspect": CommandInfo(
+        "pip._internal.commands.inspect",
+        "InspectCommand",
+        "Inspect the python environment.",
+    ),
+    "list": CommandInfo(
+        "pip._internal.commands.list",
+        "ListCommand",
+        "List installed packages.",
+    ),
+    "show": CommandInfo(
+        "pip._internal.commands.show",
+        "ShowCommand",
+        "Show information about installed packages.",
+    ),
+    "check": CommandInfo(
+        "pip._internal.commands.check",
+        "CheckCommand",
+        "Verify installed packages have compatible dependencies.",
+    ),
+    "config": CommandInfo(
+        "pip._internal.commands.configuration",
+        "ConfigurationCommand",
+        "Manage local and global configuration.",
+    ),
+    "search": CommandInfo(
+        "pip._internal.commands.search",
+        "SearchCommand",
+        "Search PyPI for packages.",
+    ),
+    "cache": CommandInfo(
+        "pip._internal.commands.cache",
+        "CacheCommand",
        "Inspect and manage pip's wheel cache.",
-    )),
-    ('index', CommandInfo(
-        'pip._internal.commands.index', 'IndexCommand',
+    ),
+    "index": CommandInfo(
+        "pip._internal.commands.index",
+        "IndexCommand",
        "Inspect information available from package indexes.",
-    )),
-    ('wheel', CommandInfo(
-        'pip._internal.commands.wheel', 'WheelCommand',
-        'Build wheels from your requirements.',
-    )),
-    ('hash', CommandInfo(
-        'pip._internal.commands.hash', 'HashCommand',
-        'Compute hashes of package archives.',
-    )),
-    ('completion', CommandInfo(
-        'pip._internal.commands.completion', 'CompletionCommand',
-        'A helper command used for command completion.',
-    )),
-    ('debug', CommandInfo(
-        'pip._internal.commands.debug', 'DebugCommand',
-        'Show information useful for debugging.',
-    )),
-    ('help', CommandInfo(
-        'pip._internal.commands.help', 'HelpCommand',
-        'Show help for commands.',
-    )),
-])
+    ),
+    "wheel": CommandInfo(
+        "pip._internal.commands.wheel",
+        "WheelCommand",
+        "Build wheels from your requirements.",
+    ),
+    "hash": CommandInfo(
+        "pip._internal.commands.hash",
+        "HashCommand",
+        "Compute hashes of package archives.",
+    ),
+    "completion": CommandInfo(
+        "pip._internal.commands.completion",
+        "CompletionCommand",
+        "A helper command used for command completion.",
+    ),
+    "debug": CommandInfo(
+        "pip._internal.commands.debug",
+        "DebugCommand",
+        "Show information useful for debugging.",
+    ),
+    "help": CommandInfo(
+        "pip._internal.commands.help",
+        "HelpCommand",
+        "Show help for commands.",
+    ),
+}


 def create_command(name: str, **kwargs: Any) -> Command:
--- a/venv/Lib/site-packages/pip/_internal/commands/cache.py
+++ b/venv/Lib/site-packages/pip/_internal/commands/cache.py
@@ -37,19 +37,18 @@ class CacheCommand(Command):
    """

    def add_options(self) -> None:
-
        self.cmd_opts.add_option(
-            '--format',
-            action='store',
-            dest='list_format',
+            "--format",
+            action="store",
+            dest="list_format",
            default="human",
-            choices=('human', 'abspath'),
-            help="Select the output format among: human (default) or abspath"
+            choices=("human", "abspath"),
+            help="Select the output format among: human (default) or abspath",
        )

        self.parser.insert_option_group(0, self.cmd_opts)

-    def run(self, options: Values, args: List[Any]) -> int:
+    def run(self, options: Values, args: List[str]) -> int:
        handlers = {
            "dir": self.get_cache_dir,
            "info": self.get_cache_info,
@@ -59,8 +58,7 @@ class CacheCommand(Command):
        }

        if not options.cache_dir:
-            logger.error("pip cache commands can not "
-                         "function since cache is disabled.")
+            logger.error("pip cache commands can not function since cache is disabled.")
            return ERROR

        # Determine action
@@ -84,69 +82,73 @@ class CacheCommand(Command):

    def get_cache_dir(self, options: Values, args: List[Any]) -> None:
        if args:
-            raise CommandError('Too many arguments')
+            raise CommandError("Too many arguments")

        logger.info(options.cache_dir)

    def get_cache_info(self, options: Values, args: List[Any]) -> None:
        if args:
-            raise CommandError('Too many arguments')
+            raise CommandError("Too many arguments")

        num_http_files = len(self._find_http_files(options))
-        num_packages = len(self._find_wheels(options, '*'))
+        num_packages = len(self._find_wheels(options, "*"))

-        http_cache_location = self._cache_dir(options, 'http')
-        wheels_cache_location = self._cache_dir(options, 'wheels')
+        http_cache_location = self._cache_dir(options, "http")
+        wheels_cache_location = self._cache_dir(options, "wheels")
        http_cache_size = filesystem.format_directory_size(http_cache_location)
-        wheels_cache_size = filesystem.format_directory_size(
-            wheels_cache_location
-        )
+        wheels_cache_size = filesystem.format_directory_size(wheels_cache_location)

-        message = textwrap.dedent("""
+        message = (
+            textwrap.dedent(
+                """
                    Package index page cache location: {http_cache_location}
                    Package index page cache size: {http_cache_size}
                    Number of HTTP files: {num_http_files}
-            Wheels location: {wheels_cache_location}
-            Wheels size: {wheels_cache_size}
-            Number of wheels: {package_count}
-        """).format(
+                    Locally built wheels location: {wheels_cache_location}
+                    Locally built wheels size: {wheels_cache_size}
+                    Number of locally built wheels: {package_count}
+                """
+            )
+            .format(
                http_cache_location=http_cache_location,
                http_cache_size=http_cache_size,
                num_http_files=num_http_files,
                wheels_cache_location=wheels_cache_location,
                package_count=num_packages,
                wheels_cache_size=wheels_cache_size,
-        ).strip()
+            )
+            .strip()
+        )

        logger.info(message)

    def list_cache_items(self, options: Values, args: List[Any]) -> None:
        if len(args) > 1:
-            raise CommandError('Too many arguments')
+            raise CommandError("Too many arguments")

        if args:
            pattern = args[0]
        else:
-            pattern = '*'
+            pattern = "*"

        files = self._find_wheels(options, pattern)
-        if options.list_format == 'human':
+        if options.list_format == "human":
            self.format_for_human(files)
        else:
            self.format_for_abspath(files)

    def format_for_human(self, files: List[str]) -> None:
        if not files:
-            logger.info('Nothing cached.')
+            logger.info("No locally built wheels cached.")
            return

        results = []
        for filename in files:
            wheel = os.path.basename(filename)
            size = filesystem.format_file_size(filename)
-            results.append(f' - {wheel} ({size})')
-        logger.info('Cache contents:\n')
-        logger.info('\n'.join(sorted(results)))
+            results.append(f" - {wheel} ({size})")
+        logger.info("Cache contents:\n")
+        logger.info("\n".join(sorted(results)))

    def format_for_abspath(self, files: List[str]) -> None:
        if not files:
@@ -156,23 +158,27 @@ class CacheCommand(Command):
        for filename in files:
            results.append(filename)

-        logger.info('\n'.join(sorted(results)))
+        logger.info("\n".join(sorted(results)))

    def remove_cache_items(self, options: Values, args: List[Any]) -> None:
        if len(args) > 1:
-            raise CommandError('Too many arguments')
+            raise CommandError("Too many arguments")

        if not args:
-            raise CommandError('Please provide a pattern')
+            raise CommandError("Please provide a pattern")

        files = self._find_wheels(options, args[0])

+        no_matching_msg = "No matching packages"
+        if args[0] == "*":
            # Only fetch http files if no specific pattern given
-        if args[0] == '*':
            files += self._find_http_files(options)
+        else:
+            # Add the pattern to the log message
+            no_matching_msg += ' for pattern "{}"'.format(args[0])

        if not files:
-            raise CommandError('No matching packages')
+            logger.warning(no_matching_msg)

        for filename in files:
            os.unlink(filename)
@@ -181,19 +187,19 @@ class CacheCommand(Command):

    def purge_cache(self, options: Values, args: List[Any]) -> None:
        if args:
-            raise CommandError('Too many arguments')
+            raise CommandError("Too many arguments")

-        return self.remove_cache_items(options, ['*'])
+        return self.remove_cache_items(options, ["*"])

    def _cache_dir(self, options: Values, subdir: str) -> str:
        return os.path.join(options.cache_dir, subdir)

    def _find_http_files(self, options: Values) -> List[str]:
-        http_dir = self._cache_dir(options, 'http')
-        return filesystem.find_files(http_dir, '*')
+        http_dir = self._cache_dir(options, "http")
+        return filesystem.find_files(http_dir, "*")

    def _find_wheels(self, options: Values, pattern: str) -> List[str]:
-        wheel_dir = self._cache_dir(options, 'wheels')
+        wheel_dir = self._cache_dir(options, "wheels")

        # The wheel filename format, as specified in PEP 427, is:
        #     {distribution}-{version}(-{build})?-{python}-{abi}-{platform}.whl
--- a/venv/Lib/site-packages/pip/_internal/commands/check.py
+++ b/venv/Lib/site-packages/pip/_internal/commands/check.py
@@ -1,6 +1,6 @@
 import logging
 from optparse import Values
-from typing import Any, List
+from typing import List

 from pip._internal.cli.base_command import Command
 from pip._internal.cli.status_codes import ERROR, SUCCESS
@@ -19,8 +19,7 @@ class CheckCommand(Command):
    usage = """
      %prog [options]"""

-    def run(self, options: Values, args: List[Any]) -> int:
-
+    def run(self, options: Values, args: List[str]) -> int:
        package_set, parsing_probs = create_package_set_from_installed()
        missing, conflicting = check_package_set(package_set)

@@ -29,7 +28,9 @@ class CheckCommand(Command):
            for dependency in missing[project_name]:
                write_output(
                    "%s %s requires %s, which is not installed.",
-                    project_name, version, dependency[0],
+                    project_name,
+                    version,
+                    dependency[0],
                )

        for project_name in conflicting:
@@ -37,7 +38,11 @@ class CheckCommand(Command):
            for dep_name, dep_version, req in conflicting[project_name]:
                write_output(
                    "%s %s has requirement %s, but you have %s %s.",
-                    project_name, version, req, dep_name, dep_version,
+                    project_name,
+                    version,
+                    req,
+                    dep_name,
+                    dep_version,
                )

        if missing or conflicting or parsing_probs:
--- a/venv/Lib/site-packages/pip/_internal/commands/completion.py
+++ b/venv/Lib/site-packages/pip/_internal/commands/completion.py
@@ -12,7 +12,7 @@ BASE_COMPLETION = """
 """

 COMPLETION_SCRIPTS = {
-    'bash': """
+    "bash": """
        _pip_completion()
        {{
            COMPREPLY=( $( COMP_WORDS="${{COMP_WORDS[*]}}" \\
@@ -21,7 +21,7 @@ COMPLETION_SCRIPTS = {
        }}
        complete -o default -F _pip_completion {prog}
    """,
-    'zsh': """
+    "zsh": """
        function _pip_completion {{
          local words cword
          read -Ac words
@@ -32,7 +32,7 @@ COMPLETION_SCRIPTS = {
        }}
        compctl -K _pip_completion {prog}
    """,
-    'fish': """
+    "fish": """
        function __fish_complete_pip
            set -lx COMP_WORDS (commandline -o) ""
            set -lx COMP_CWORD ( \\
@@ -43,6 +43,28 @@ COMPLETION_SCRIPTS = {
        end
        complete -fa "(__fish_complete_pip)" -c {prog}
    """,
+    "powershell": """
+        if ((Test-Path Function:\\TabExpansion) -and -not `
+            (Test-Path Function:\\_pip_completeBackup)) {{
+            Rename-Item Function:\\TabExpansion _pip_completeBackup
+        }}
+        function TabExpansion($line, $lastWord) {{
+            $lastBlock = [regex]::Split($line, '[|;]')[-1].TrimStart()
+            if ($lastBlock.StartsWith("{prog} ")) {{
+                $Env:COMP_WORDS=$lastBlock
+                $Env:COMP_CWORD=$lastBlock.Split().Length - 1
+                $Env:PIP_AUTO_COMPLETE=1
+                (& {prog}).Split()
+                Remove-Item Env:COMP_WORDS
+                Remove-Item Env:COMP_CWORD
+                Remove-Item Env:PIP_AUTO_COMPLETE
+            }}
+            elseif (Test-Path Function:\\_pip_completeBackup) {{
+                # Fall back on existing tab expansion
+                _pip_completeBackup $line $lastWord
+            }}
+        }}
+    """,
 }


@@ -53,39 +75,52 @@ class CompletionCommand(Command):

    def add_options(self) -> None:
        self.cmd_opts.add_option(
-            '--bash', '-b',
-            action='store_const',
-            const='bash',
-            dest='shell',
-            help='Emit completion code for bash')
+            "--bash",
+            "-b",
+            action="store_const",
+            const="bash",
+            dest="shell",
+            help="Emit completion code for bash",
+        )
        self.cmd_opts.add_option(
-            '--zsh', '-z',
-            action='store_const',
-            const='zsh',
-            dest='shell',
-            help='Emit completion code for zsh')
+            "--zsh",
+            "-z",
+            action="store_const",
+            const="zsh",
+            dest="shell",
+            help="Emit completion code for zsh",
+        )
        self.cmd_opts.add_option(
-            '--fish', '-f',
-            action='store_const',
-            const='fish',
-            dest='shell',
-            help='Emit completion code for fish')
+            "--fish",
+            "-f",
+            action="store_const",
+            const="fish",
+            dest="shell",
+            help="Emit completion code for fish",
+        )
+        self.cmd_opts.add_option(
+            "--powershell",
+            "-p",
+            action="store_const",
+            const="powershell",
+            dest="shell",
+            help="Emit completion code for powershell",
+        )

        self.parser.insert_option_group(0, self.cmd_opts)

    def run(self, options: Values, args: List[str]) -> int:
        """Prints the completion code of the given shell"""
        shells = COMPLETION_SCRIPTS.keys()
-        shell_options = ['--' + shell for shell in sorted(shells)]
+        shell_options = ["--" + shell for shell in sorted(shells)]
        if options.shell in shells:
            script = textwrap.dedent(
-                COMPLETION_SCRIPTS.get(options.shell, '').format(
-                    prog=get_prog())
+                COMPLETION_SCRIPTS.get(options.shell, "").format(prog=get_prog())
            )
            print(BASE_COMPLETION.format(script=script, shell=options.shell))
            return SUCCESS
        else:
            sys.stderr.write(
-                'ERROR: You must pass {}\n' .format(' or '.join(shell_options))
+                "ERROR: You must pass {}\n".format(" or ".join(shell_options))
            )
            return SUCCESS
--- a/venv/Lib/site-packages/pip/_internal/commands/configuration.py
+++ b/venv/Lib/site-packages/pip/_internal/commands/configuration.py
@@ -27,14 +27,20 @@ class ConfigurationCommand(Command):

    - list: List the active configuration (or from the file specified)
    - edit: Edit the configuration file in an editor
-    - get: Get the value associated with name
-    - set: Set the name=value
-    - unset: Unset the value associated with name
+    - get: Get the value associated with command.option
+    - set: Set the command.option=value
+    - unset: Unset the value associated with command.option
    - debug: List the configuration files and values defined under them

+    Configuration keys should be dot separated command and option name,
+    with the special prefix "global" affecting any command. For example,
+    "pip config set global.index-url https://example.org/" would configure
+    the index url for all commands, but "pip config set download.timeout 10"
+    would configure a 10 second timeout only for "pip download" commands.
+
    If none of --user, --global and --site are passed, a virtual
    environment configuration file is used if one is active and the file
-    exists. Otherwise, all modifications happen on the to the user file by
+    exists. Otherwise, all modifications happen to the user file by
    default.
    """

@@ -43,46 +49,46 @@ class ConfigurationCommand(Command):
        %prog [<file-option>] list
        %prog [<file-option>] [--editor <editor-path>] edit

-        %prog [<file-option>] get name
-        %prog [<file-option>] set name value
-        %prog [<file-option>] unset name
+        %prog [<file-option>] get command.option
+        %prog [<file-option>] set command.option value
+        %prog [<file-option>] unset command.option
        %prog [<file-option>] debug
    """

    def add_options(self) -> None:
        self.cmd_opts.add_option(
-            '--editor',
-            dest='editor',
-            action='store',
+            "--editor",
+            dest="editor",
+            action="store",
            default=None,
            help=(
-                'Editor to use to edit the file. Uses VISUAL or EDITOR '
-                'environment variables if not provided.'
-            )
+                "Editor to use to edit the file. Uses VISUAL or EDITOR "
+                "environment variables if not provided."
+            ),
        )

        self.cmd_opts.add_option(
-            '--global',
-            dest='global_file',
-            action='store_true',
+            "--global",
+            dest="global_file",
+            action="store_true",
            default=False,
-            help='Use the system-wide configuration file only'
+            help="Use the system-wide configuration file only",
        )

        self.cmd_opts.add_option(
-            '--user',
-            dest='user_file',
-            action='store_true',
+            "--user",
+            dest="user_file",
+            action="store_true",
            default=False,
-            help='Use the user configuration file only'
+            help="Use the user configuration file only",
        )

        self.cmd_opts.add_option(
-            '--site',
-            dest='site_file',
-            action='store_true',
+            "--site",
+            dest="site_file",
+            action="store_true",
            default=False,
-            help='Use the current environment configuration file only'
+            help="Use the current environment configuration file only",
        )

        self.parser.insert_option_group(0, self.cmd_opts)
@@ -133,11 +139,15 @@ class ConfigurationCommand(Command):
        return SUCCESS

    def _determine_file(self, options: Values, need_value: bool) -> Optional[Kind]:
-        file_options = [key for key, value in (
+        file_options = [
+            key
+            for key, value in (
                (kinds.USER, options.user_file),
                (kinds.GLOBAL, options.global_file),
                (kinds.SITE, options.site_file),
-        ) if value]
+            )
+            if value
+        ]

        if not file_options:
            if not need_value:
@@ -194,24 +204,22 @@ class ConfigurationCommand(Command):
            for fname in files:
                with indent_log():
                    file_exists = os.path.exists(fname)
-                    write_output("%s, exists: %r",
-                                 fname, file_exists)
+                    write_output("%s, exists: %r", fname, file_exists)
                    if file_exists:
                        self.print_config_file_values(variant)

    def print_config_file_values(self, variant: Kind) -> None:
        """Get key-value pairs from the file of a variant"""
-        for name, value in self.configuration.\
-                get_values_in_config(variant).items():
+        for name, value in self.configuration.get_values_in_config(variant).items():
            with indent_log():
                write_output("%s: %s", name, value)

    def print_env_var_values(self) -> None:
        """Get key-values pairs present as environment variables"""
-        write_output("%s:", 'env_var')
+        write_output("%s:", "env_var")
        with indent_log():
            for key, value in sorted(self.configuration.get_environ_vars()):
-                env_var = f'PIP_{key.upper()}'
+                env_var = f"PIP_{key.upper()}"
                write_output("%s=%r", env_var, value)

    def open_in_editor(self, options: Values, args: List[str]) -> None:
@@ -220,21 +228,29 @@ class ConfigurationCommand(Command):
        fname = self.configuration.get_file_to_edit()
        if fname is None:
            raise PipError("Could not determine appropriate file.")
+        elif '"' in fname:
+            # This shouldn't happen, unless we see a username like that.
+            # If that happens, we'd appreciate a pull request fixing this.
+            raise PipError(
+                f'Can not open an editor for a file name containing "\n{fname}'
+            )

        try:
-            subprocess.check_call([editor, fname])
+            subprocess.check_call(f'{editor} "{fname}"', shell=True)
+        except FileNotFoundError as e:
+            if not e.filename:
+                e.filename = editor
+            raise
        except subprocess.CalledProcessError as e:
            raise PipError(
-                "Editor Subprocess exited with exit code {}"
-                .format(e.returncode)
+                "Editor Subprocess exited with exit code {}".format(e.returncode)
            )

    def _get_n_args(self, args: List[str], example: str, n: int) -> Any:
-        """Helper to make sure the command got the right number of arguments
-        """
+        """Helper to make sure the command got the right number of arguments"""
        if len(args) != n:
            msg = (
-                'Got unexpected number of arguments, expected {}. '
+                "Got unexpected number of arguments, expected {}. "
                '(example: "{} config {}")'
            ).format(n, get_prog(), example)
            raise PipError(msg)
--- a/venv/Lib/site-packages/pip/_internal/commands/debug.py
+++ b/venv/Lib/site-packages/pip/_internal/commands/debug.py
@@ -1,3 +1,4 @@
+import importlib.resources
 import locale
 import logging
 import os
@@ -10,7 +11,6 @@ import pip._vendor
 from pip._vendor.certifi import where
 from pip._vendor.packaging.version import parse as parse_version

-from pip import __file__ as pip_location
 from pip._internal.cli import cmdoptions
 from pip._internal.cli.base_command import Command
 from pip._internal.cli.cmdoptions import make_target_python
@@ -24,55 +24,46 @@ logger = logging.getLogger(__name__)


 def show_value(name: str, value: Any) -> None:
-    logger.info('%s: %s', name, value)
+    logger.info("%s: %s", name, value)


 def show_sys_implementation() -> None:
-    logger.info('sys.implementation:')
+    logger.info("sys.implementation:")
    implementation_name = sys.implementation.name
    with indent_log():
-        show_value('name', implementation_name)
+        show_value("name", implementation_name)


 def create_vendor_txt_map() -> Dict[str, str]:
-    vendor_txt_path = os.path.join(
-        os.path.dirname(pip_location),
-        '_vendor',
-        'vendor.txt'
-    )
-
-    with open(vendor_txt_path) as f:
+    with importlib.resources.open_text("pip._vendor", "vendor.txt") as f:
        # Purge non version specifying lines.
        # Also, remove any space prefix or suffixes (including comments).
-        lines = [line.strip().split(' ', 1)[0]
-                 for line in f.readlines() if '==' in line]
+        lines = [
+            line.strip().split(" ", 1)[0] for line in f.readlines() if "==" in line
+        ]

    # Transform into "module" -> version dict.
-    return dict(line.split('==', 1) for line in lines)  # type: ignore
+    return dict(line.split("==", 1) for line in lines)


 def get_module_from_module_name(module_name: str) -> ModuleType:
    # Module name can be uppercase in vendor.txt for some reason...
-    module_name = module_name.lower()
+    module_name = module_name.lower().replace("-", "_")
    # PATCH: setuptools is actually only pkg_resources.
-    if module_name == 'setuptools':
-        module_name = 'pkg_resources'
+    if module_name == "setuptools":
+        module_name = "pkg_resources"

-    __import__(
-        f'pip._vendor.{module_name}',
-        globals(),
-        locals(),
-        level=0
-    )
+    __import__(f"pip._vendor.{module_name}", globals(), locals(), level=0)
    return getattr(pip._vendor, module_name)


 def get_vendor_version_from_module(module_name: str) -> Optional[str]:
    module = get_module_from_module_name(module_name)
-    version = getattr(module, '__version__', None)
+    version = getattr(module, "__version__", None)

    if not version:
        # Try to find version in debundled module info.
+        assert module.__file__ is not None
        env = get_environment([os.path.dirname(module.__file__)])
        dist = env.get_distribution(module_name)
        if dist:
@@ -86,20 +77,24 @@ def show_actual_vendor_versions(vendor_txt_versions: Dict[str, str]) -> None:
    a conflict or if the actual version could not be imported.
    """
    for module_name, expected_version in vendor_txt_versions.items():
-        extra_message = ''
+        extra_message = ""
        actual_version = get_vendor_version_from_module(module_name)
        if not actual_version:
-            extra_message = ' (Unable to locate actual module version, using'\
-                            ' vendor.txt specified version)'
+            extra_message = (
+                " (Unable to locate actual module version, using"
+                " vendor.txt specified version)"
+            )
            actual_version = expected_version
        elif parse_version(actual_version) != parse_version(expected_version):
-            extra_message = ' (CONFLICT: vendor.txt suggests version should'\
-                            ' be {})'.format(expected_version)
-        logger.info('%s==%s%s', module_name, actual_version, extra_message)
+            extra_message = (
+                " (CONFLICT: vendor.txt suggests version should"
+                " be {})".format(expected_version)
+            )
+        logger.info("%s==%s%s", module_name, actual_version, extra_message)


 def show_vendor_versions() -> None:
-    logger.info('vendored library versions:')
+    logger.info("vendored library versions:")

    vendor_txt_versions = create_vendor_txt_map()
    with indent_log():
@@ -114,11 +109,11 @@ def show_tags(options: Values) -> None:

    # Display the target options that were explicitly provided.
    formatted_target = target_python.format_given()
-    suffix = ''
+    suffix = ""
    if formatted_target:
-        suffix = f' (target: {formatted_target})'
+        suffix = f" (target: {formatted_target})"

-    msg = 'Compatible tags: {}{}'.format(len(tags), suffix)
+    msg = "Compatible tags: {}{}".format(len(tags), suffix)
    logger.info(msg)

    if options.verbose < 1 and len(tags) > tag_limit:
@@ -133,8 +128,7 @@ def show_tags(options: Values) -> None:

        if tags_limited:
            msg = (
-                '...\n'
-                '[First {tag_limit} tags shown. Pass --verbose to show all.]'
+                "...\n[First {tag_limit} tags shown. Pass --verbose to show all.]"
            ).format(tag_limit=tag_limit)
            logger.info(msg)

@@ -142,20 +136,20 @@ def show_tags(options: Values) -> None:
 def ca_bundle_info(config: Configuration) -> str:
    levels = set()
    for key, _ in config.items():
-        levels.add(key.split('.')[0])
+        levels.add(key.split(".")[0])

    if not levels:
        return "Not specified"

-    levels_that_override_global = ['install', 'wheel', 'download']
+    levels_that_override_global = ["install", "wheel", "download"]
    global_overriding_level = [
        level for level in levels if level in levels_that_override_global
    ]
    if not global_overriding_level:
-        return 'global'
+        return "global"

-    if 'global' in levels:
-        levels.remove('global')
+    if "global" in levels:
+        levels.remove("global")
    return ", ".join(levels)


@@ -180,20 +174,21 @@ class DebugCommand(Command):
            "details, since the output and options of this command may "
            "change without notice."
        )
-        show_value('pip version', get_pip_version())
-        show_value('sys.version', sys.version)
-        show_value('sys.executable', sys.executable)
-        show_value('sys.getdefaultencoding', sys.getdefaultencoding())
-        show_value('sys.getfilesystemencoding', sys.getfilesystemencoding())
+        show_value("pip version", get_pip_version())
+        show_value("sys.version", sys.version)
+        show_value("sys.executable", sys.executable)
+        show_value("sys.getdefaultencoding", sys.getdefaultencoding())
+        show_value("sys.getfilesystemencoding", sys.getfilesystemencoding())
        show_value(
-            'locale.getpreferredencoding', locale.getpreferredencoding(),
+            "locale.getpreferredencoding",
+            locale.getpreferredencoding(),
        )
-        show_value('sys.platform', sys.platform)
+        show_value("sys.platform", sys.platform)
        show_sys_implementation()

        show_value("'cert' config value", ca_bundle_info(self.parser.config))
-        show_value("REQUESTS_CA_BUNDLE", os.environ.get('REQUESTS_CA_BUNDLE'))
-        show_value("CURL_CA_BUNDLE", os.environ.get('CURL_CA_BUNDLE'))
+        show_value("REQUESTS_CA_BUNDLE", os.environ.get("REQUESTS_CA_BUNDLE"))
+        show_value("CURL_CA_BUNDLE", os.environ.get("CURL_CA_BUNDLE"))
        show_value("pip._vendor.certifi.where()", where())
        show_value("pip._vendor.DEBUNDLED", pip._vendor.DEBUNDLED)

--- a/venv/Lib/site-packages/pip/_internal/commands/download.py
+++ b/venv/Lib/site-packages/pip/_internal/commands/download.py
@@ -7,7 +7,8 @@ from pip._internal.cli import cmdoptions
 from pip._internal.cli.cmdoptions import make_target_python
 from pip._internal.cli.req_command import RequirementCommand, with_cleanup
 from pip._internal.cli.status_codes import SUCCESS
-from pip._internal.req.req_tracker import get_requirement_tracker
+from pip._internal.operations.build.build_tracker import get_build_tracker
+from pip._internal.req.req_install import check_legacy_setup_py_options
 from pip._internal.utils.misc import ensure_dir, normalize_path, write_output
 from pip._internal.utils.temp_dir import TempDirectory

@@ -37,7 +38,6 @@ class DownloadCommand(RequirementCommand):
    def add_options(self) -> None:
        self.cmd_opts.add_option(cmdoptions.constraints())
        self.cmd_opts.add_option(cmdoptions.requirements())
-        self.cmd_opts.add_option(cmdoptions.build_dir())
        self.cmd_opts.add_option(cmdoptions.no_deps())
        self.cmd_opts.add_option(cmdoptions.global_options())
        self.cmd_opts.add_option(cmdoptions.no_binary())
@@ -50,14 +50,18 @@ class DownloadCommand(RequirementCommand):
        self.cmd_opts.add_option(cmdoptions.no_build_isolation())
        self.cmd_opts.add_option(cmdoptions.use_pep517())
        self.cmd_opts.add_option(cmdoptions.no_use_pep517())
+        self.cmd_opts.add_option(cmdoptions.check_build_deps())
        self.cmd_opts.add_option(cmdoptions.ignore_requires_python())

        self.cmd_opts.add_option(
-            '-d', '--dest', '--destination-dir', '--destination-directory',
-            dest='download_dir',
-            metavar='dir',
+            "-d",
+            "--dest",
+            "--destination-dir",
+            "--destination-directory",
+            dest="download_dir",
+            metavar="dir",
            default=os.curdir,
-            help=("Download packages into <dir>."),
+            help="Download packages into <dir>.",
        )

        cmdoptions.add_target_python_options(self.cmd_opts)
@@ -72,7 +76,6 @@ class DownloadCommand(RequirementCommand):

    @with_cleanup
    def run(self, options: Values, args: List[str]) -> int:
-
        options.ignore_installed = True
        # editable doesn't really make sense for `pip download`, but the bowels
        # of the RequirementSet code require that property.
@@ -93,7 +96,7 @@ class DownloadCommand(RequirementCommand):
            ignore_requires_python=options.ignore_requires_python,
        )

-        req_tracker = self.enter_context(get_requirement_tracker())
+        build_tracker = self.enter_context(get_build_tracker())

        directory = TempDirectory(
            delete=not options.no_clean,
@@ -102,15 +105,17 @@ class DownloadCommand(RequirementCommand):
        )

        reqs = self.get_requirements(args, options, finder, session)
+        check_legacy_setup_py_options(options, reqs)

        preparer = self.make_requirement_preparer(
            temp_build_dir=directory,
            options=options,
-            req_tracker=req_tracker,
+            build_tracker=build_tracker,
            session=session,
            finder=finder,
            download_dir=options.download_dir,
            use_user_site=False,
+            verbosity=self.verbosity,
        )

        resolver = self.make_resolver(
@@ -118,14 +123,13 @@ class DownloadCommand(RequirementCommand):
            finder=finder,
            options=options,
            ignore_requires_python=options.ignore_requires_python,
+            use_pep517=options.use_pep517,
            py_version_info=options.python_version,
        )

        self.trace_basic_info(finder)

-        requirement_set = resolver.resolve(
-            reqs, check_supported_wheels=True
-        )
+        requirement_set = resolver.resolve(reqs, check_supported_wheels=True)

        downloaded: List[str] = []
        for req in requirement_set.requirements.values():
@@ -134,6 +138,6 @@ class DownloadCommand(RequirementCommand):
                preparer.save_linked_requirement(req)
                downloaded.append(req.name)
        if downloaded:
-            write_output('Successfully downloaded %s', ' '.join(downloaded))
+            write_output("Successfully downloaded %s", " ".join(downloaded))

        return SUCCESS
--- a/venv/Lib/site-packages/pip/_internal/commands/freeze.py
+++ b/venv/Lib/site-packages/pip/_internal/commands/freeze.py
@@ -8,7 +8,7 @@ from pip._internal.cli.status_codes import SUCCESS
 from pip._internal.operations.freeze import freeze
 from pip._internal.utils.compat import stdlib_pkgs

-DEV_PKGS = {'pip', 'setuptools', 'distribute', 'wheel'}
+DEV_PKGS = {"pip", "setuptools", "distribute", "wheel"}


 class FreezeCommand(Command):
@@ -24,39 +24,52 @@ class FreezeCommand(Command):

    def add_options(self) -> None:
        self.cmd_opts.add_option(
-            '-r', '--requirement',
-            dest='requirements',
-            action='append',
+            "-r",
+            "--requirement",
+            dest="requirements",
+            action="append",
            default=[],
-            metavar='file',
-            help="Use the order in the given requirements file and its "
+            metavar="file",
+            help=(
+                "Use the order in the given requirements file and its "
                "comments when generating output. This option can be "
-                 "used multiple times.")
+                "used multiple times."
+            ),
+        )
        self.cmd_opts.add_option(
-            '-l', '--local',
-            dest='local',
-            action='store_true',
+            "-l",
+            "--local",
+            dest="local",
+            action="store_true",
            default=False,
-            help='If in a virtualenv that has global access, do not output '
-                 'globally-installed packages.')
+            help=(
+                "If in a virtualenv that has global access, do not output "
+                "globally-installed packages."
+            ),
+        )
        self.cmd_opts.add_option(
-            '--user',
-            dest='user',
-            action='store_true',
+            "--user",
+            dest="user",
+            action="store_true",
            default=False,
-            help='Only output packages installed in user-site.')
+            help="Only output packages installed in user-site.",
+        )
        self.cmd_opts.add_option(cmdoptions.list_path())
        self.cmd_opts.add_option(
-            '--all',
-            dest='freeze_all',
-            action='store_true',
-            help='Do not skip these packages in the output:'
-                 ' {}'.format(', '.join(DEV_PKGS)))
+            "--all",
+            dest="freeze_all",
+            action="store_true",
+            help=(
+                "Do not skip these packages in the output:"
+                " {}".format(", ".join(DEV_PKGS))
+            ),
+        )
        self.cmd_opts.add_option(
-            '--exclude-editable',
-            dest='exclude_editable',
-            action='store_true',
-            help='Exclude editable package from output.')
+            "--exclude-editable",
+            dest="exclude_editable",
+            action="store_true",
+            help="Exclude editable package from output.",
+        )
        self.cmd_opts.add_option(cmdoptions.list_exclude())

        self.parser.insert_option_group(0, self.cmd_opts)
@@ -80,5 +93,5 @@ class FreezeCommand(Command):
            skip=skip,
            exclude_editable=options.exclude_editable,
        ):
-            sys.stdout.write(line + '\n')
+            sys.stdout.write(line + "\n")
        return SUCCESS
--- a/venv/Lib/site-packages/pip/_internal/commands/hash.py
+++ b/venv/Lib/site-packages/pip/_internal/commands/hash.py
@@ -20,18 +20,21 @@ class HashCommand(Command):
    installs.
    """

-    usage = '%prog [options] <file> ...'
+    usage = "%prog [options] <file> ..."
    ignore_require_venv = True

    def add_options(self) -> None:
        self.cmd_opts.add_option(
-            '-a', '--algorithm',
-            dest='algorithm',
+            "-a",
+            "--algorithm",
+            dest="algorithm",
            choices=STRONG_HASHES,
-            action='store',
+            action="store",
            default=FAVORITE_HASH,
-            help='The hash algorithm to use: one of {}'.format(
-                 ', '.join(STRONG_HASHES)))
+            help="The hash algorithm to use: one of {}".format(
+                ", ".join(STRONG_HASHES)
+            ),
+        )
        self.parser.insert_option_group(0, self.cmd_opts)

    def run(self, options: Values, args: List[str]) -> int:
@@ -41,14 +44,15 @@ class HashCommand(Command):

        algorithm = options.algorithm
        for path in args:
-            write_output('%s:\n--hash=%s:%s',
-                         path, algorithm, _hash_of_file(path, algorithm))
+            write_output(
+                "%s:\n--hash=%s:%s", path, algorithm, _hash_of_file(path, algorithm)
+            )
        return SUCCESS


 def _hash_of_file(path: str, algorithm: str) -> str:
    """Return the hash digest of a file."""
-    with open(path, 'rb') as archive:
+    with open(path, "rb") as archive:
        hash = hashlib.new(algorithm)
        for chunk in read_chunks(archive):
            hash.update(chunk)
--- a/venv/Lib/site-packages/pip/_internal/commands/help.py
+++ b/venv/Lib/site-packages/pip/_internal/commands/help.py
@@ -33,7 +33,7 @@ class HelpCommand(Command):
            if guess:
                msg.append(f'maybe you meant "{guess}"')

-            raise CommandError(' - '.join(msg))
+            raise CommandError(" - ".join(msg))

        command = create_command(cmd_name)
        command.parser.print_help()
--- a/venv/Lib/site-packages/pip/_internal/commands/index.py
+++ b/venv/Lib/site-packages/pip/_internal/commands/index.py
@@ -24,6 +24,7 @@ class IndexCommand(IndexGroupCommand):
    Inspect information available from package indexes.
    """

+    ignore_require_venv = True
    usage = """
        %prog versions <package>
    """
@@ -44,7 +45,7 @@ class IndexCommand(IndexGroupCommand):
        self.parser.insert_option_group(0, index_opts)
        self.parser.insert_option_group(0, self.cmd_opts)

-    def run(self, options: Values, args: List[Any]) -> int:
+    def run(self, options: Values, args: List[str]) -> int:
        handlers = {
            "versions": self.get_available_package_versions,
        }
@@ -101,7 +102,7 @@ class IndexCommand(IndexGroupCommand):

    def get_available_package_versions(self, options: Values, args: List[Any]) -> None:
        if len(args) != 1:
-            raise CommandError('You need to specify exactly one argument')
+            raise CommandError("You need to specify exactly one argument")

        target_python = cmdoptions.make_target_python(options)
        query = args[0]
@@ -115,25 +116,24 @@ class IndexCommand(IndexGroupCommand):
            )

            versions: Iterable[Union[LegacyVersion, Version]] = (
-                candidate.version
-                for candidate in finder.find_all_candidates(query)
+                candidate.version for candidate in finder.find_all_candidates(query)
            )

            if not options.pre:
                # Remove prereleases
-                versions = (version for version in versions
-                            if not version.is_prerelease)
+                versions = (
+                    version for version in versions if not version.is_prerelease
+                )
            versions = set(versions)

            if not versions:
                raise DistributionNotFound(
-                    'No matching distribution found for {}'.format(query))
+                    "No matching distribution found for {}".format(query)
+                )

-            formatted_versions = [str(ver) for ver in sorted(
-                versions, reverse=True)]
+            formatted_versions = [str(ver) for ver in sorted(versions, reverse=True)]
            latest = formatted_versions[0]

-        write_output('{} ({})'.format(query, latest))
-        write_output('Available versions: {}'.format(
-            ', '.join(formatted_versions)))
+        write_output("{} ({})".format(query, latest))
+        write_output("Available versions: {}".format(", ".join(formatted_versions)))
        print_dist_installation_info(query, latest)
--- a/venv/Lib/site-packages/pip/_internal/commands/install.py
+++ b/venv/Lib/site-packages/pip/_internal/commands/install.py
@@ -1,12 +1,13 @@
 import errno
+import json
 import operator
 import os
 import shutil
 import site
 from optparse import SUPPRESS_HELP, Values
-from typing import Iterable, List, Optional
+from typing import List, Optional

-from pip._vendor.packaging.utils import canonicalize_name
+from pip._vendor.rich import print_json

 from pip._internal.cache import WheelCache
 from pip._internal.cli import cmdoptions
@@ -20,16 +21,19 @@ from pip._internal.cli.status_codes import ERROR, SUCCESS
 from pip._internal.exceptions import CommandError, InstallationError
 from pip._internal.locations import get_scheme
 from pip._internal.metadata import get_environment
-from pip._internal.models.format_control import FormatControl
+from pip._internal.models.installation_report import InstallationReport
+from pip._internal.operations.build.build_tracker import get_build_tracker
 from pip._internal.operations.check import ConflictDetails, check_install_conflicts
 from pip._internal.req import install_given_reqs
-from pip._internal.req.req_install import InstallRequirement
-from pip._internal.req.req_tracker import get_requirement_tracker
+from pip._internal.req.req_install import (
+    InstallRequirement,
+    check_legacy_setup_py_options,
+)
 from pip._internal.utils.compat import WINDOWS
-from pip._internal.utils.distutils_args import parse_distutils_args
 from pip._internal.utils.filesystem import test_writable_dir
 from pip._internal.utils.logging import getLogger
 from pip._internal.utils.misc import (
+    check_externally_managed,
    ensure_dir,
    get_pip_version,
    protect_pip_from_modification_on_windows,
@@ -40,24 +44,11 @@ from pip._internal.utils.virtualenv import (
    running_under_virtualenv,
    virtualenv_no_global,
 )
-from pip._internal.wheel_builder import (
-    BinaryAllowedPredicate,
-    build,
-    should_build_for_install_command,
-)
+from pip._internal.wheel_builder import build, should_build_for_install_command

 logger = getLogger(__name__)


-def get_check_binary_allowed(format_control: FormatControl) -> BinaryAllowedPredicate:
-    def check_binary_allowed(req: InstallRequirement) -> bool:
-        canonical_name = canonicalize_name(req.name or "")
-        allowed_formats = format_control.get_allowed_formats(canonical_name)
-        return "binary" in allowed_formats
-
-    return check_binary_allowed
-
-
 class InstallCommand(RequirementCommand):
    """
    Install packages from:
@@ -86,95 +77,129 @@ class InstallCommand(RequirementCommand):

        self.cmd_opts.add_option(cmdoptions.editable())
        self.cmd_opts.add_option(
-            '-t', '--target',
-            dest='target_dir',
-            metavar='dir',
+            "--dry-run",
+            action="store_true",
+            dest="dry_run",
+            default=False,
+            help=(
+                "Don't actually install anything, just print what would be. "
+                "Can be used in combination with --ignore-installed "
+                "to 'resolve' the requirements."
+            ),
+        )
+        self.cmd_opts.add_option(
+            "-t",
+            "--target",
+            dest="target_dir",
+            metavar="dir",
            default=None,
-            help='Install packages into <dir>. '
-                 'By default this will not replace existing files/folders in '
-                 '<dir>. Use --upgrade to replace existing packages in <dir> '
-                 'with new versions.'
+            help=(
+                "Install packages into <dir>. "
+                "By default this will not replace existing files/folders in "
+                "<dir>. Use --upgrade to replace existing packages in <dir> "
+                "with new versions."
+            ),
        )
        cmdoptions.add_target_python_options(self.cmd_opts)

        self.cmd_opts.add_option(
-            '--user',
-            dest='use_user_site',
-            action='store_true',
-            help="Install to the Python user install directory for your "
+            "--user",
+            dest="use_user_site",
+            action="store_true",
+            help=(
+                "Install to the Python user install directory for your "
                "platform. Typically ~/.local/, or %APPDATA%\\Python on "
                "Windows. (See the Python documentation for site.USER_BASE "
-                 "for full details.)")
+                "for full details.)"
+            ),
+        )
        self.cmd_opts.add_option(
-            '--no-user',
-            dest='use_user_site',
-            action='store_false',
-            help=SUPPRESS_HELP)
+            "--no-user",
+            dest="use_user_site",
+            action="store_false",
+            help=SUPPRESS_HELP,
+        )
        self.cmd_opts.add_option(
-            '--root',
-            dest='root_path',
-            metavar='dir',
+            "--root",
+            dest="root_path",
+            metavar="dir",
            default=None,
-            help="Install everything relative to this alternate root "
-                 "directory.")
+            help="Install everything relative to this alternate root directory.",
+        )
        self.cmd_opts.add_option(
-            '--prefix',
-            dest='prefix_path',
-            metavar='dir',
+            "--prefix",
+            dest="prefix_path",
+            metavar="dir",
            default=None,
-            help="Installation prefix where lib, bin and other top-level "
-                 "folders are placed")
-
-        self.cmd_opts.add_option(cmdoptions.build_dir())
+            help=(
+                "Installation prefix where lib, bin and other top-level "
+                "folders are placed. Note that the resulting installation may "
+                "contain scripts and other resources which reference the "
+                "Python interpreter of pip, and not that of ``--prefix``. "
+                "See also the ``--python`` option if the intention is to "
+                "install packages into another (possibly pip-free) "
+                "environment."
+            ),
+        )

        self.cmd_opts.add_option(cmdoptions.src())

        self.cmd_opts.add_option(
-            '-U', '--upgrade',
-            dest='upgrade',
-            action='store_true',
-            help='Upgrade all specified packages to the newest available '
-                 'version. The handling of dependencies depends on the '
-                 'upgrade-strategy used.'
+            "-U",
+            "--upgrade",
+            dest="upgrade",
+            action="store_true",
+            help=(
+                "Upgrade all specified packages to the newest available "
+                "version. The handling of dependencies depends on the "
+                "upgrade-strategy used."
+            ),
        )

        self.cmd_opts.add_option(
-            '--upgrade-strategy',
-            dest='upgrade_strategy',
-            default='only-if-needed',
-            choices=['only-if-needed', 'eager'],
-            help='Determines how dependency upgrading should be handled '
-                 '[default: %default]. '
+            "--upgrade-strategy",
+            dest="upgrade_strategy",
+            default="only-if-needed",
+            choices=["only-if-needed", "eager"],
+            help=(
+                "Determines how dependency upgrading should be handled "
+                "[default: %default]. "
                '"eager" - dependencies are upgraded regardless of '
-                 'whether the currently installed version satisfies the '
-                 'requirements of the upgraded package(s). '
+                "whether the currently installed version satisfies the "
+                "requirements of the upgraded package(s). "
                '"only-if-needed" -  are upgraded only when they do not '
-                 'satisfy the requirements of the upgraded package(s).'
+                "satisfy the requirements of the upgraded package(s)."
+            ),
        )

        self.cmd_opts.add_option(
-            '--force-reinstall',
-            dest='force_reinstall',
-            action='store_true',
-            help='Reinstall all packages even if they are already '
-                 'up-to-date.')
+            "--force-reinstall",
+            dest="force_reinstall",
+            action="store_true",
+            help="Reinstall all packages even if they are already up-to-date.",
+        )

        self.cmd_opts.add_option(
-            '-I', '--ignore-installed',
-            dest='ignore_installed',
-            action='store_true',
-            help='Ignore the installed packages, overwriting them. '
-                 'This can break your system if the existing package '
-                 'is of a different version or was installed '
-                 'with a different package manager!'
+            "-I",
+            "--ignore-installed",
+            dest="ignore_installed",
+            action="store_true",
+            help=(
+                "Ignore the installed packages, overwriting them. "
+                "This can break your system if the existing package "
+                "is of a different version or was installed "
+                "with a different package manager!"
+            ),
        )

        self.cmd_opts.add_option(cmdoptions.ignore_requires_python())
        self.cmd_opts.add_option(cmdoptions.no_build_isolation())
        self.cmd_opts.add_option(cmdoptions.use_pep517())
        self.cmd_opts.add_option(cmdoptions.no_use_pep517())
+        self.cmd_opts.add_option(cmdoptions.check_build_deps())
+        self.cmd_opts.add_option(cmdoptions.override_externally_managed())

-        self.cmd_opts.add_option(cmdoptions.install_options())
+        self.cmd_opts.add_option(cmdoptions.config_settings())
        self.cmd_opts.add_option(cmdoptions.global_options())

        self.cmd_opts.add_option(
@@ -206,12 +231,12 @@ class InstallCommand(RequirementCommand):
            default=True,
            help="Do not warn about broken dependencies",
        )
-
        self.cmd_opts.add_option(cmdoptions.no_binary())
        self.cmd_opts.add_option(cmdoptions.only_binary())
        self.cmd_opts.add_option(cmdoptions.prefer_binary())
        self.cmd_opts.add_option(cmdoptions.require_hashes())
        self.cmd_opts.add_option(cmdoptions.progress_bar())
+        self.cmd_opts.add_option(cmdoptions.root_user_action())

        index_opts = cmdoptions.make_option_group(
            cmdoptions.index_group,
@@ -221,20 +246,50 @@ class InstallCommand(RequirementCommand):
        self.parser.insert_option_group(0, index_opts)
        self.parser.insert_option_group(0, self.cmd_opts)

+        self.cmd_opts.add_option(
+            "--report",
+            dest="json_report_file",
+            metavar="file",
+            default=None,
+            help=(
+                "Generate a JSON file describing what pip did to install "
+                "the provided requirements. "
+                "Can be used in combination with --dry-run and --ignore-installed "
+                "to 'resolve' the requirements. "
+                "When - is used as file name it writes to stdout. "
+                "When writing to stdout, please combine with the --quiet option "
+                "to avoid mixing pip logging output with JSON output."
+            ),
+        )
+
    @with_cleanup
    def run(self, options: Values, args: List[str]) -> int:
        if options.use_user_site and options.target_dir is not None:
            raise CommandError("Can not combine '--user' and '--target'")

-        cmdoptions.check_install_build_global(options)
+        # Check whether the environment we're installing into is externally
+        # managed, as specified in PEP 668. Specifying --root, --target, or
+        # --prefix disables the check, since there's no reliable way to locate
+        # the EXTERNALLY-MANAGED file for those cases. An exception is also
+        # made specifically for "--dry-run --report" for convenience.
+        installing_into_current_environment = (
+            not (options.dry_run and options.json_report_file)
+            and options.root_path is None
+            and options.target_dir is None
+            and options.prefix_path is None
+        )
+        if (
+            installing_into_current_environment
+            and not options.override_externally_managed
+        ):
+            check_externally_managed()
+
        upgrade_strategy = "to-satisfy-only"
        if options.upgrade:
            upgrade_strategy = options.upgrade_strategy

        cmdoptions.check_dist_restriction(options, check_target=True)

-        install_options = options.install_options or []
-
        logger.verbose("Using %s", get_pip_version())
        options.use_user_site = decide_user_install(
            options.use_user_site,
@@ -249,11 +304,14 @@ class InstallCommand(RequirementCommand):
        if options.target_dir:
            options.ignore_installed = True
            options.target_dir = os.path.abspath(options.target_dir)
-            if (os.path.exists(options.target_dir) and not
-                    os.path.isdir(options.target_dir)):
+            if (
+                # fmt: off
+                os.path.exists(options.target_dir) and
+                not os.path.isdir(options.target_dir)
+                # fmt: on
+            ):
                raise CommandError(
-                    "Target path exists but is not a directory, will not "
-                    "continue."
+                    "Target path exists but is not a directory, will not continue."
                )

            # Create a target directory for using with the target option
@@ -272,9 +330,7 @@ class InstallCommand(RequirementCommand):
            target_python=target_python,
            ignore_requires_python=options.ignore_requires_python,
        )
-        wheel_cache = WheelCache(options.cache_dir, options.format_control)
-
-        req_tracker = self.enter_context(get_requirement_tracker())
+        build_tracker = self.enter_context(get_build_tracker())

        directory = TempDirectory(
            delete=not options.no_clean,
@@ -284,18 +340,24 @@ class InstallCommand(RequirementCommand):

        try:
            reqs = self.get_requirements(args, options, finder, session)
+            check_legacy_setup_py_options(options, reqs)

-            reject_location_related_install_options(
-                reqs, options.install_options
-            )
+            wheel_cache = WheelCache(options.cache_dir)
+
+            # Only when installing is it permitted to use PEP 660.
+            # In other circumstances (pip wheel, pip download) we generate
+            # regular (i.e. non editable) metadata and wheels.
+            for req in reqs:
+                req.permit_editable_wheels = True

            preparer = self.make_requirement_preparer(
                temp_build_dir=directory,
                options=options,
-                req_tracker=req_tracker,
+                build_tracker=build_tracker,
                session=session,
                finder=finder,
                use_user_site=options.use_user_site,
+                verbosity=self.verbosity,
            )
            resolver = self.make_resolver(
                preparer=preparer,
@@ -316,6 +378,26 @@ class InstallCommand(RequirementCommand):
                reqs, check_supported_wheels=not options.target_dir
            )

+            if options.json_report_file:
+                report = InstallationReport(requirement_set.requirements_to_install)
+                if options.json_report_file == "-":
+                    print_json(data=report.to_dict())
+                else:
+                    with open(options.json_report_file, "w", encoding="utf-8") as f:
+                        json.dump(report.to_dict(), f, indent=2, ensure_ascii=False)
+
+            if options.dry_run:
+                would_install_items = sorted(
+                    (r.metadata["name"], r.metadata["version"])
+                    for r in requirement_set.requirements_to_install
+                )
+                if would_install_items:
+                    write_output(
+                        "Would install %s",
+                        " ".join("-".join(item) for item in would_install_items),
+                    )
+                return SUCCESS
+
            try:
                pip_req = requirement_set.get_requirement("pip")
            except KeyError:
@@ -324,19 +406,12 @@ class InstallCommand(RequirementCommand):
                # If we're not replacing an already installed pip,
                # we're not modifying it.
                modifying_pip = pip_req.satisfied_by is None
-            protect_pip_from_modification_on_windows(
-                modifying_pip=modifying_pip
-            )
-
-            check_binary_allowed = get_check_binary_allowed(
-                finder.format_control
-            )
+            protect_pip_from_modification_on_windows(modifying_pip=modifying_pip)

            reqs_to_build = [
-                r for r in requirement_set.requirements.values()
-                if should_build_for_install_command(
-                    r, check_binary_allowed
-                )
+                r
+                for r in requirement_set.requirements.values()
+                if should_build_for_install_command(r)
            ]

            _, build_failures = build(
@@ -344,39 +419,23 @@ class InstallCommand(RequirementCommand):
                wheel_cache=wheel_cache,
                verify=True,
                build_options=[],
-                global_options=[],
+                global_options=global_options,
            )

-            # If we're using PEP 517, we cannot do a direct install
-            # so we fail here.
-            pep517_build_failure_names: List[str] = [
-                r.name   # type: ignore
-                for r in build_failures if r.use_pep517
-            ]
-            if pep517_build_failure_names:
+            if build_failures:
                raise InstallationError(
-                    "Could not build wheels for {} which use"
-                    " PEP 517 and cannot be installed directly".format(
-                        ", ".join(pep517_build_failure_names)
+                    "Could not build wheels for {}, which is required to "
+                    "install pyproject.toml-based projects".format(
+                        ", ".join(r.name for r in build_failures)  # type: ignore
                    )
                )

-            # For now, we just warn about failures building legacy
-            # requirements, as we'll fall through to a direct
-            # install for those.
-            for r in build_failures:
-                if not r.use_pep517:
-                    r.legacy_install_reason = 8368
-
-            to_install = resolver.get_installation_order(
-                requirement_set
-            )
+            to_install = resolver.get_installation_order(requirement_set)

            # Check for conflicts in the package set we're installing.
            conflicts: Optional[ConflictDetails] = None
            should_warn_about_conflicts = (
-                not options.ignore_dependencies and
-                options.warn_about_conflicts
+                not options.ignore_dependencies and options.warn_about_conflicts
            )
            if should_warn_about_conflicts:
                conflicts = self._determine_conflicts(to_install)
@@ -389,7 +448,6 @@ class InstallCommand(RequirementCommand):

            installed = install_given_reqs(
                to_install,
-                install_options,
                global_options,
                root=options.root_path,
                home=target_temp_dir_path,
@@ -408,7 +466,7 @@ class InstallCommand(RequirementCommand):
            )
            env = get_environment(lib_locations)

-            installed.sort(key=operator.attrgetter('name'))
+            installed.sort(key=operator.attrgetter("name"))
            items = []
            for result in installed:
                item = result.name
@@ -426,16 +484,19 @@ class InstallCommand(RequirementCommand):
                    resolver_variant=self.determine_resolver_variant(options),
                )

-            installed_desc = ' '.join(items)
+            installed_desc = " ".join(items)
            if installed_desc:
                write_output(
-                    'Successfully installed %s', installed_desc,
+                    "Successfully installed %s",
+                    installed_desc,
                )
        except OSError as error:
-            show_traceback = (self.verbosity >= 1)
+            show_traceback = self.verbosity >= 1

            message = create_os_error_message(
-                error, show_traceback, options.use_user_site,
+                error,
+                show_traceback,
+                options.use_user_site,
            )
            logger.error(message, exc_info=show_traceback)  # noqa

@@ -446,7 +507,7 @@ class InstallCommand(RequirementCommand):
            self._handle_target_dir(
                options.target_dir, target_temp_dir, options.upgrade
            )
-
+        if options.root_user_action == "warn":
            warn_if_run_as_root()
        return SUCCESS

@@ -461,7 +522,7 @@ class InstallCommand(RequirementCommand):

        # Checking both purelib and platlib directories for installed
        # packages to be moved to target directory
-        scheme = get_scheme('', home=target_temp_dir.path)
+        scheme = get_scheme("", home=target_temp_dir.path)
        purelib_dir = scheme.purelib
        platlib_dir = scheme.platlib
        data_dir = scheme.data
@@ -483,18 +544,18 @@ class InstallCommand(RequirementCommand):
                if os.path.exists(target_item_dir):
                    if not upgrade:
                        logger.warning(
-                            'Target directory %s already exists. Specify '
-                            '--upgrade to force replacement.',
-                            target_item_dir
+                            "Target directory %s already exists. Specify "
+                            "--upgrade to force replacement.",
+                            target_item_dir,
                        )
                        continue
                    if os.path.islink(target_item_dir):
                        logger.warning(
-                            'Target directory %s already exists and is '
-                            'a link. pip will not automatically replace '
-                            'links, please remove if replacement is '
-                            'desired.',
-                            target_item_dir
+                            "Target directory %s already exists and is "
+                            "a link. pip will not automatically replace "
+                            "links, please remove if replacement is "
+                            "desired.",
+                            target_item_dir,
                        )
                        continue
                    if os.path.isdir(target_item_dir):
@@ -502,10 +563,7 @@ class InstallCommand(RequirementCommand):
                    else:
                        os.remove(target_item_dir)

-                shutil.move(
-                    os.path.join(lib_dir, item),
-                    target_item_dir
-                )
+                shutil.move(os.path.join(lib_dir, item), target_item_dir)

    def _determine_conflicts(
        self, to_install: List[InstallRequirement]
@@ -567,7 +625,7 @@ class InstallCommand(RequirementCommand):
                    requirement=req,
                    dep_name=dep_name,
                    dep_version=dep_version,
-                    you=("you" if resolver_variant == "2020-resolver" else "you'll")
+                    you=("you" if resolver_variant == "2020-resolver" else "you'll"),
                )
                parts.append(message)

@@ -579,10 +637,10 @@ def get_lib_location_guesses(
    home: Optional[str] = None,
    root: Optional[str] = None,
    isolated: bool = False,
-        prefix: Optional[str] = None
+    prefix: Optional[str] = None,
 ) -> List[str]:
    scheme = get_scheme(
-        '',
+        "",
        user=user,
        home=home,
        root=root,
@@ -594,8 +652,8 @@ def get_lib_location_guesses(

 def site_packages_writable(root: Optional[str], isolated: bool) -> bool:
    return all(
-        test_writable_dir(d) for d in set(
-            get_lib_location_guesses(root=root, isolated=isolated))
+        test_writable_dir(d)
+        for d in set(get_lib_location_guesses(root=root, isolated=isolated))
    )


@@ -653,53 +711,13 @@ def decide_user_install(
        logger.debug("Non-user install because site-packages writeable")
        return False

-    logger.info("Defaulting to user installation because normal site-packages "
-                "is not writeable")
+    logger.info(
+        "Defaulting to user installation because normal site-packages "
+        "is not writeable"
+    )
    return True


-def reject_location_related_install_options(
-    requirements: List[InstallRequirement], options: Optional[List[str]]
-) -> None:
-    """If any location-changing --install-option arguments were passed for
-    requirements or on the command-line, then show a deprecation warning.
-    """
-    def format_options(option_names: Iterable[str]) -> List[str]:
-        return ["--{}".format(name.replace("_", "-")) for name in option_names]
-
-    offenders = []
-
-    for requirement in requirements:
-        install_options = requirement.install_options
-        location_options = parse_distutils_args(install_options)
-        if location_options:
-            offenders.append(
-                "{!r} from {}".format(
-                    format_options(location_options.keys()), requirement
-                )
-            )
-
-    if options:
-        location_options = parse_distutils_args(options)
-        if location_options:
-            offenders.append(
-                "{!r} from command line".format(
-                    format_options(location_options.keys())
-                )
-            )
-
-    if not offenders:
-        return
-
-    raise CommandError(
-        "Location-changing options found in --install-option: {}."
-        " This is unsupported, use pip-level options like --user,"
-        " --prefix, --root, and --target instead.".format(
-            "; ".join(offenders)
-        )
-    )
-
-
 def create_os_error_message(
    error: OSError, show_traceback: bool, using_user_site: bool
 ) -> str:
@@ -727,18 +745,25 @@ def create_os_error_message(
        permissions_part = "Check the permissions"

        if not running_under_virtualenv() and not using_user_site:
-            parts.extend([
-                user_option_part, " or ",
+            parts.extend(
+                [
+                    user_option_part,
+                    " or ",
                    permissions_part.lower(),
-            ])
+                ]
+            )
        else:
            parts.append(permissions_part)
        parts.append(".\n")

    # Suggest the user to enable Long Paths if path length is
    # more than 260
-    if (WINDOWS and error.errno == errno.ENOENT and error.filename and
-            len(error.filename) > 260):
+    if (
+        WINDOWS
+        and error.errno == errno.ENOENT
+        and error.filename
+        and len(error.filename) > 260
+    ):
        parts.append(
            "HINT: This error might have occurred since "
            "this system does not have Windows Long Path "
--- a/venv/Lib/site-packages/pip/_internal/commands/list.py
+++ b/venv/Lib/site-packages/pip/_internal/commands/list.py
@@ -1,7 +1,7 @@
 import json
 import logging
 from optparse import Values
-from typing import TYPE_CHECKING, Iterator, List, Optional, Sequence, Tuple, cast
+from typing import TYPE_CHECKING, Generator, List, Optional, Sequence, Tuple, cast

 from pip._vendor.packaging.utils import canonicalize_name

@@ -14,8 +14,8 @@ from pip._internal.index.package_finder import PackageFinder
 from pip._internal.metadata import BaseDistribution, get_environment
 from pip._internal.models.selection_prefs import SelectionPreferences
 from pip._internal.network.session import PipSession
-from pip._internal.utils.misc import stdlib_pkgs, tabulate, write_output
-from pip._internal.utils.parallel import map_multithread
+from pip._internal.utils.compat import stdlib_pkgs
+from pip._internal.utils.misc import tabulate, write_output

 if TYPE_CHECKING:
    from pip._internal.metadata.base import DistributionVersion
@@ -26,6 +26,7 @@ if TYPE_CHECKING:
        These will be populated during ``get_outdated()``. This is dirty but
        makes the rest of the code much cleaner.
        """
+
        latest_version: DistributionVersion
        latest_filetype: str

@@ -48,77 +49,85 @@ class ListCommand(IndexGroupCommand):

    def add_options(self) -> None:
        self.cmd_opts.add_option(
-            '-o', '--outdated',
-            action='store_true',
+            "-o",
+            "--outdated",
+            action="store_true",
            default=False,
-            help='List outdated packages')
-        self.cmd_opts.add_option(
-            '-u', '--uptodate',
-            action='store_true',
-            default=False,
-            help='List uptodate packages')
-        self.cmd_opts.add_option(
-            '-e', '--editable',
-            action='store_true',
-            default=False,
-            help='List editable projects.')
-        self.cmd_opts.add_option(
-            '-l', '--local',
-            action='store_true',
-            default=False,
-            help=('If in a virtualenv that has global access, do not list '
-                  'globally-installed packages.'),
+            help="List outdated packages",
        )
        self.cmd_opts.add_option(
-            '--user',
-            dest='user',
-            action='store_true',
+            "-u",
+            "--uptodate",
+            action="store_true",
            default=False,
-            help='Only output packages installed in user-site.')
+            help="List uptodate packages",
+        )
+        self.cmd_opts.add_option(
+            "-e",
+            "--editable",
+            action="store_true",
+            default=False,
+            help="List editable projects.",
+        )
+        self.cmd_opts.add_option(
+            "-l",
+            "--local",
+            action="store_true",
+            default=False,
+            help=(
+                "If in a virtualenv that has global access, do not list "
+                "globally-installed packages."
+            ),
+        )
+        self.cmd_opts.add_option(
+            "--user",
+            dest="user",
+            action="store_true",
+            default=False,
+            help="Only output packages installed in user-site.",
+        )
        self.cmd_opts.add_option(cmdoptions.list_path())
        self.cmd_opts.add_option(
-            '--pre',
-            action='store_true',
+            "--pre",
+            action="store_true",
            default=False,
-            help=("Include pre-release and development versions. By default, "
-                  "pip only finds stable versions."),
+            help=(
+                "Include pre-release and development versions. By default, "
+                "pip only finds stable versions."
+            ),
        )

        self.cmd_opts.add_option(
-            '--format',
-            action='store',
-            dest='list_format',
+            "--format",
+            action="store",
+            dest="list_format",
            default="columns",
-            choices=('columns', 'freeze', 'json'),
-            help="Select the output format among: columns (default), freeze, "
-                 "or json",
+            choices=("columns", "freeze", "json"),
+            help="Select the output format among: columns (default), freeze, or json",
        )

        self.cmd_opts.add_option(
-            '--not-required',
-            action='store_true',
-            dest='not_required',
-            help="List packages that are not dependencies of "
-                 "installed packages.",
+            "--not-required",
+            action="store_true",
+            dest="not_required",
+            help="List packages that are not dependencies of installed packages.",
        )

        self.cmd_opts.add_option(
-            '--exclude-editable',
-            action='store_false',
-            dest='include_editable',
-            help='Exclude editable package from output.',
+            "--exclude-editable",
+            action="store_false",
+            dest="include_editable",
+            help="Exclude editable package from output.",
        )
        self.cmd_opts.add_option(
-            '--include-editable',
-            action='store_true',
-            dest='include_editable',
-            help='Include editable package from output.',
+            "--include-editable",
+            action="store_true",
+            dest="include_editable",
+            help="Include editable package from output.",
            default=True,
        )
        self.cmd_opts.add_option(cmdoptions.list_exclude())
-        index_opts = cmdoptions.make_option_group(
-            cmdoptions.index_group, self.parser
-        )
+        index_opts = cmdoptions.make_option_group(cmdoptions.index_group, self.parser)

        self.parser.insert_option_group(0, index_opts)
        self.parser.insert_option_group(0, self.cmd_opts)
@@ -144,8 +153,12 @@ class ListCommand(IndexGroupCommand):

    def run(self, options: Values, args: List[str]) -> int:
        if options.outdated and options.uptodate:
+            raise CommandError("Options --outdated and --uptodate cannot be combined.")
+
+        if options.outdated and options.list_format == "freeze":
            raise CommandError(
-                "Options --outdated and --uptodate cannot be combined.")
+                "List format 'freeze' can not be used with the --outdated option."
+            )

        cmdoptions.check_list_path_option(options)

@@ -183,7 +196,8 @@ class ListCommand(IndexGroupCommand):
        self, packages: "_ProcessedDists", options: Values
    ) -> "_ProcessedDists":
        return [
-            dist for dist in self.iter_packages_latest_infos(packages, options)
+            dist
+            for dist in self.iter_packages_latest_infos(packages, options)
            if dist.latest_version > dist.version
        ]

@@ -191,7 +205,8 @@ class ListCommand(IndexGroupCommand):
        self, packages: "_ProcessedDists", options: Values
    ) -> "_ProcessedDists":
        return [
-            dist for dist in self.iter_packages_latest_infos(packages, options)
+            dist
+            for dist in self.iter_packages_latest_infos(packages, options)
            if dist.latest_version == dist.version
        ]

@@ -211,18 +226,21 @@ class ListCommand(IndexGroupCommand):

    def iter_packages_latest_infos(
        self, packages: "_ProcessedDists", options: Values
-    ) -> Iterator["_DistWithLatestInfo"]:
+    ) -> Generator["_DistWithLatestInfo", None, None]:
        with self._build_session(options) as session:
            finder = self._build_package_finder(options, session)

            def latest_info(
-                dist: "_DistWithLatestInfo"
+                dist: "_DistWithLatestInfo",
            ) -> Optional["_DistWithLatestInfo"]:
                all_candidates = finder.find_all_candidates(dist.canonical_name)
                if not options.pre:
                    # Remove prereleases
-                    all_candidates = [candidate for candidate in all_candidates
-                                      if not candidate.version.is_prerelease]
+                    all_candidates = [
+                        candidate
+                        for candidate in all_candidates
+                        if not candidate.version.is_prerelease
+                    ]

                evaluator = finder.make_candidate_evaluator(
                    project_name=dist.canonical_name,
@@ -233,14 +251,14 @@ class ListCommand(IndexGroupCommand):

                remote_version = best_candidate.version
                if best_candidate.link.is_wheel:
-                    typ = 'wheel'
+                    typ = "wheel"
                else:
-                    typ = 'sdist'
+                    typ = "sdist"
                dist.latest_version = remote_version
                dist.latest_filetype = typ
                return dist

-            for dist in map_multithread(latest_info, packages):
+            for dist in map(latest_info, packages):
                if dist is not None:
                    yield dist

@@ -251,17 +269,18 @@ class ListCommand(IndexGroupCommand):
            packages,
            key=lambda dist: dist.canonical_name,
        )
-        if options.list_format == 'columns' and packages:
+        if options.list_format == "columns" and packages:
            data, header = format_for_columns(packages, options)
            self.output_package_listing_columns(data, header)
-        elif options.list_format == 'freeze':
+        elif options.list_format == "freeze":
            for dist in packages:
                if options.verbose >= 1:
-                    write_output("%s==%s (%s)", dist.raw_name,
-                                 dist.version, dist.location)
+                    write_output(
+                        "%s==%s (%s)", dist.raw_name, dist.version, dist.location
+                    )
                else:
                    write_output("%s==%s", dist.raw_name, dist.version)
-        elif options.list_format == 'json':
+        elif options.list_format == "json":
            write_output(format_for_json(packages, options))

    def output_package_listing_columns(
@@ -275,7 +294,7 @@ class ListCommand(IndexGroupCommand):

        # Create and add a separator.
        if len(data) > 0:
-            pkg_strings.insert(1, " ".join(map(lambda x: '-' * x, sizes)))
+            pkg_strings.insert(1, " ".join(map(lambda x: "-" * x, sizes)))

        for val in pkg_strings:
            write_output(val)
@@ -288,19 +307,22 @@ def format_for_columns(
    Convert the package data into something usable
    by output_package_listing_columns.
    """
-    running_outdated = options.outdated
-    # Adjust the header for the `pip list --outdated` case.
-    if running_outdated:
-        header = ["Package", "Version", "Latest", "Type"]
-    else:
    header = ["Package", "Version"]

-    data = []
-    if options.verbose >= 1 or any(x.editable for x in pkgs):
+    running_outdated = options.outdated
+    if running_outdated:
+        header.extend(["Latest", "Type"])
+
+    has_editables = any(x.editable for x in pkgs)
+    if has_editables:
+        header.append("Editable project location")
+
+    if options.verbose >= 1:
        header.append("Location")
    if options.verbose >= 1:
        header.append("Installer")

+    data = []
    for proj in pkgs:
        # if we're working on the 'outdated' list, separate out the
        # latest_version and type
@@ -310,7 +332,10 @@ def format_for_columns(
            row.append(str(proj.latest_version))
            row.append(proj.latest_filetype)

-        if options.verbose >= 1 or proj.editable:
+        if has_editables:
+            row.append(proj.editable_project_location or "")
+
+        if options.verbose >= 1:
            row.append(proj.location or "")
        if options.verbose >= 1:
            row.append(proj.installer)
@@ -324,14 +349,17 @@ def format_for_json(packages: "_ProcessedDists", options: Values) -> str:
    data = []
    for dist in packages:
        info = {
-            'name': dist.raw_name,
-            'version': str(dist.version),
+            "name": dist.raw_name,
+            "version": str(dist.version),
        }
        if options.verbose >= 1:
-            info['location'] = dist.location or ""
-            info['installer'] = dist.installer
+            info["location"] = dist.location or ""
+            info["installer"] = dist.installer
        if options.outdated:
-            info['latest_version'] = str(dist.latest_version)
-            info['latest_filetype'] = dist.latest_filetype
+            info["latest_version"] = str(dist.latest_version)
+            info["latest_filetype"] = dist.latest_filetype
+        editable_project_location = dist.editable_project_location
+        if editable_project_location:
+            info["editable_project_location"] = editable_project_location
        data.append(info)
    return json.dumps(data)
--- a/venv/Lib/site-packages/pip/_internal/commands/search.py
+++ b/venv/Lib/site-packages/pip/_internal/commands/search.py
@@ -27,6 +27,7 @@ if TYPE_CHECKING:
        summary: str
        versions: List[str]

+
 logger = logging.getLogger(__name__)


@@ -39,17 +40,19 @@ class SearchCommand(Command, SessionCommandMixin):

    def add_options(self) -> None:
        self.cmd_opts.add_option(
-            '-i', '--index',
-            dest='index',
-            metavar='URL',
+            "-i",
+            "--index",
+            dest="index",
+            metavar="URL",
            default=PyPI.pypi_url,
-            help='Base URL of Python Package Index (default %default)')
+            help="Base URL of Python Package Index (default %default)",
+        )

        self.parser.insert_option_group(0, self.cmd_opts)

    def run(self, options: Values, args: List[str]) -> int:
        if not args:
-            raise CommandError('Missing required argument (search query).')
+            raise CommandError("Missing required argument (search query).")
        query = args
        pypi_hits = self.search(query, options)
        hits = transform_hits(pypi_hits)
@@ -71,7 +74,7 @@ class SearchCommand(Command, SessionCommandMixin):
        transport = PipXmlrpcTransport(index_url, session)
        pypi = xmlrpc.client.ServerProxy(index_url, transport)
        try:
-            hits = pypi.search({'name': query, 'summary': query}, 'or')
+            hits = pypi.search({"name": query, "summary": query}, "or")
        except xmlrpc.client.Fault as fault:
            message = "XMLRPC request failed [code: {code}]\n{string}".format(
                code=fault.faultCode,
@@ -90,22 +93,22 @@ def transform_hits(hits: List[Dict[str, str]]) -> List["TransformedHit"]:
    """
    packages: Dict[str, "TransformedHit"] = OrderedDict()
    for hit in hits:
-        name = hit['name']
-        summary = hit['summary']
-        version = hit['version']
+        name = hit["name"]
+        summary = hit["summary"]
+        version = hit["version"]

        if name not in packages.keys():
            packages[name] = {
-                'name': name,
-                'summary': summary,
-                'versions': [version],
+                "name": name,
+                "summary": summary,
+                "versions": [version],
            }
        else:
-            packages[name]['versions'].append(version)
+            packages[name]["versions"].append(version)

            # if this is the highest version, replace summary and score
-            if version == highest_version(packages[name]['versions']):
-                packages[name]['summary'] = summary
+            if version == highest_version(packages[name]["versions"]):
+                packages[name]["summary"] = summary

    return list(packages.values())

@@ -116,14 +119,17 @@ def print_dist_installation_info(name: str, latest: str) -> None:
    if dist is not None:
        with indent_log():
            if dist.version == latest:
-                write_output('INSTALLED: %s (latest)', dist.version)
+                write_output("INSTALLED: %s (latest)", dist.version)
            else:
-                write_output('INSTALLED: %s', dist.version)
+                write_output("INSTALLED: %s", dist.version)
                if parse_version(latest).pre:
-                    write_output('LATEST:    %s (pre-release; install'
-                                 ' with "pip install --pre")', latest)
+                    write_output(
+                        "LATEST:    %s (pre-release; install"
+                        " with `pip install --pre`)",
+                        latest,
+                    )
                else:
-                    write_output('LATEST:    %s', latest)
+                    write_output("LATEST:    %s", latest)


 def print_results(
@@ -134,25 +140,29 @@ def print_results(
    if not hits:
        return
    if name_column_width is None:
-        name_column_width = max([
-            len(hit['name']) + len(highest_version(hit.get('versions', ['-'])))
+        name_column_width = (
+            max(
+                [
+                    len(hit["name"]) + len(highest_version(hit.get("versions", ["-"])))
                    for hit in hits
-        ]) + 4
+                ]
+            )
+            + 4
+        )

    for hit in hits:
-        name = hit['name']
-        summary = hit['summary'] or ''
-        latest = highest_version(hit.get('versions', ['-']))
+        name = hit["name"]
+        summary = hit["summary"] or ""
+        latest = highest_version(hit.get("versions", ["-"]))
        if terminal_width is not None:
            target_width = terminal_width - name_column_width - 5
            if target_width > 10:
                # wrap and indent summary to fit terminal
                summary_lines = textwrap.wrap(summary, target_width)
-                summary = ('\n' + ' ' * (name_column_width + 3)).join(
-                    summary_lines)
+                summary = ("\n" + " " * (name_column_width + 3)).join(summary_lines)

-        name_latest = f'{name} ({latest})'
-        line = f'{name_latest:{name_column_width}} - {summary}'
+        name_latest = f"{name} ({latest})"
+        line = f"{name_latest:{name_column_width}} - {summary}"
        try:
            write_output(line)
            print_dist_installation_info(name, latest)
--- a/venv/Lib/site-packages/pip/_internal/commands/show.py
+++ b/venv/Lib/site-packages/pip/_internal/commands/show.py
@@ -1,8 +1,6 @@
-import csv
 import logging
-import pathlib
 from optparse import Values
-from typing import Iterator, List, NamedTuple, Optional, Tuple
+from typing import Generator, Iterable, Iterator, List, NamedTuple, Optional

 from pip._vendor.packaging.utils import canonicalize_name

@@ -27,23 +25,26 @@ class ShowCommand(Command):

    def add_options(self) -> None:
        self.cmd_opts.add_option(
-            '-f', '--files',
-            dest='files',
-            action='store_true',
+            "-f",
+            "--files",
+            dest="files",
+            action="store_true",
            default=False,
-            help='Show the full list of installed files for each package.')
+            help="Show the full list of installed files for each package.",
+        )

        self.parser.insert_option_group(0, self.cmd_opts)

    def run(self, options: Values, args: List[str]) -> int:
        if not args:
-            logger.warning('ERROR: Please provide a package name or names.')
+            logger.warning("ERROR: Please provide a package name or names.")
            return ERROR
        query = args

        results = search_packages_info(query)
        if not print_results(
-                results, list_files=options.files, verbose=options.verbose):
+            results, list_files=options.files, verbose=options.verbose
+        ):
            return ERROR
        return SUCCESS

@@ -52,6 +53,7 @@ class _PackageInfo(NamedTuple):
    name: str
    version: str
    location: str
+    editable_project_location: Optional[str]
    requires: List[str]
    required_by: List[str]
    installer: str
@@ -59,6 +61,7 @@ class _PackageInfo(NamedTuple):
    classifiers: List[str]
    summary: str
    homepage: str
+    project_urls: List[str]
    author: str
    author_email: str
    license: str
@@ -66,34 +69,7 @@ class _PackageInfo(NamedTuple):
    files: Optional[List[str]]


-def _covert_legacy_entry(entry: Tuple[str, ...], info: Tuple[str, ...]) -> str:
-    """Convert a legacy installed-files.txt path into modern RECORD path.
-
-    The legacy format stores paths relative to the info directory, while the
-    modern format stores paths relative to the package root, e.g. the
-    site-packages directory.
-
-    :param entry: Path parts of the installed-files.txt entry.
-    :param info: Path parts of the egg-info directory relative to package root.
-    :returns: The converted entry.
-
-    For best compatibility with symlinks, this does not use ``abspath()`` or
-    ``Path.resolve()``, but tries to work with path parts:
-
-    1. While ``entry`` starts with ``..``, remove the equal amounts of parts
-       from ``info``; if ``info`` is empty, start appending ``..`` instead.
-    2. Join the two directly.
-    """
-    while entry and entry[0] == "..":
-        if not info or info[-1] == "..":
-            info += ("..",)
-        else:
-            info = info[:-1]
-        entry = entry[1:]
-    return str(pathlib.Path(*info, *entry))
-
-
-def search_packages_info(query: List[str]) -> Iterator[_PackageInfo]:
+def search_packages_info(query: List[str]) -> Generator[_PackageInfo, None, None]:
    """
    Gather details from installed distributions. Print distribution name,
    version, location, and installed files. Installed files requires a
@@ -102,53 +78,20 @@ def search_packages_info(query: List[str]) -> Iterator[_PackageInfo]:
    """
    env = get_default_environment()

-    installed = {
-        dist.canonical_name: dist
-        for dist in env.iter_distributions()
-    }
+    installed = {dist.canonical_name: dist for dist in env.iter_all_distributions()}
    query_names = [canonicalize_name(name) for name in query]
    missing = sorted(
        [name for name, pkg in zip(query, query_names) if pkg not in installed]
    )
    if missing:
-        logger.warning('Package(s) not found: %s', ', '.join(missing))
+        logger.warning("Package(s) not found: %s", ", ".join(missing))

-    def _get_requiring_packages(current_dist: BaseDistribution) -> List[str]:
-        return [
+    def _get_requiring_packages(current_dist: BaseDistribution) -> Iterator[str]:
+        return (
            dist.metadata["Name"] or "UNKNOWN"
            for dist in installed.values()
-            if current_dist.canonical_name in {
-                canonicalize_name(d.name) for d in dist.iter_dependencies()
-            }
-        ]
-
-    def _files_from_record(dist: BaseDistribution) -> Optional[Iterator[str]]:
-        try:
-            text = dist.read_text('RECORD')
-        except FileNotFoundError:
-            return None
-        # This extra Path-str cast normalizes entries.
-        return (str(pathlib.Path(row[0])) for row in csv.reader(text.splitlines()))
-
-    def _files_from_legacy(dist: BaseDistribution) -> Optional[Iterator[str]]:
-        try:
-            text = dist.read_text('installed-files.txt')
-        except FileNotFoundError:
-            return None
-        paths = (p for p in text.splitlines(keepends=False) if p)
-        root = dist.location
-        info = dist.info_directory
-        if root is None or info is None:
-            return paths
-        try:
-            info_rel = pathlib.Path(info).relative_to(root)
-        except ValueError:  # info is not relative to root.
-            return paths
-        if not info_rel.parts:  # info *is* root.
-            return paths
-        return (
-            _covert_legacy_entry(pathlib.Path(p).parts, info_rel.parts)
-            for p in paths
+            if current_dist.canonical_name
+            in {canonicalize_name(d.name) for d in dist.iter_dependencies()}
        )

    for query_name in query_names:
@@ -157,13 +100,16 @@ def search_packages_info(query: List[str]) -> Iterator[_PackageInfo]:
        except KeyError:
            continue

+        requires = sorted((req.name for req in dist.iter_dependencies()), key=str.lower)
+        required_by = sorted(_get_requiring_packages(dist), key=str.lower)
+
        try:
-            entry_points_text = dist.read_text('entry_points.txt')
+            entry_points_text = dist.read_text("entry_points.txt")
            entry_points = entry_points_text.splitlines(keepends=False)
        except FileNotFoundError:
            entry_points = []

-        files_iter = _files_from_record(dist) or _files_from_legacy(dist)
+        files_iter = dist.iter_declared_entries()
        if files_iter is None:
            files: Optional[List[str]] = None
        else:
@@ -175,13 +121,15 @@ def search_packages_info(query: List[str]) -> Iterator[_PackageInfo]:
            name=dist.raw_name,
            version=str(dist.version),
            location=dist.location or "",
-            requires=[req.name for req in dist.iter_dependencies()],
-            required_by=_get_requiring_packages(dist),
+            editable_project_location=dist.editable_project_location,
+            requires=requires,
+            required_by=required_by,
            installer=dist.installer,
            metadata_version=dist.metadata_version or "",
            classifiers=metadata.get_all("Classifier", []),
            summary=metadata.get("Summary", ""),
            homepage=metadata.get("Home-page", ""),
+            project_urls=metadata.get_all("Project-URL", []),
            author=metadata.get("Author", ""),
            author_email=metadata.get("Author-email", ""),
            license=metadata.get("License", ""),
@@ -191,7 +139,7 @@ def search_packages_info(query: List[str]) -> Iterator[_PackageInfo]:


 def print_results(
-    distributions: Iterator[_PackageInfo],
+    distributions: Iterable[_PackageInfo],
    list_files: bool,
    verbose: bool,
 ) -> bool:
@@ -212,8 +160,12 @@ def print_results(
        write_output("Author-email: %s", dist.author_email)
        write_output("License: %s", dist.license)
        write_output("Location: %s", dist.location)
-        write_output("Requires: %s", ', '.join(dist.requires))
-        write_output("Required-by: %s", ', '.join(dist.required_by))
+        if dist.editable_project_location is not None:
+            write_output(
+                "Editable project location: %s", dist.editable_project_location
+            )
+        write_output("Requires: %s", ", ".join(dist.requires))
+        write_output("Required-by: %s", ", ".join(dist.required_by))

        if verbose:
            write_output("Metadata-Version: %s", dist.metadata_version)
@@ -224,6 +176,9 @@ def print_results(
            write_output("Entry-points:")
            for entry in dist.entry_points:
                write_output("  %s", entry.strip())
+            write_output("Project-URLs:")
+            for project_url in dist.project_urls:
+                write_output("  %s", project_url)
        if list_files:
            write_output("Files:")
            if dist.files is None:
--- a/venv/Lib/site-packages/pip/_internal/commands/uninstall.py
+++ b/venv/Lib/site-packages/pip/_internal/commands/uninstall.py
@@ -4,6 +4,7 @@ from typing import List

 from pip._vendor.packaging.utils import canonicalize_name

+from pip._internal.cli import cmdoptions
 from pip._internal.cli.base_command import Command
 from pip._internal.cli.req_command import SessionCommandMixin, warn_if_run_as_root
 from pip._internal.cli.status_codes import SUCCESS
@@ -13,7 +14,10 @@ from pip._internal.req.constructors import (
    install_req_from_line,
    install_req_from_parsed_requirement,
 )
-from pip._internal.utils.misc import protect_pip_from_modification_on_windows
+from pip._internal.utils.misc import (
+    check_externally_managed,
+    protect_pip_from_modification_on_windows,
+)

 logger = logging.getLogger(__name__)

@@ -35,20 +39,26 @@ class UninstallCommand(Command, SessionCommandMixin):

    def add_options(self) -> None:
        self.cmd_opts.add_option(
-            '-r', '--requirement',
-            dest='requirements',
-            action='append',
+            "-r",
+            "--requirement",
+            dest="requirements",
+            action="append",
            default=[],
-            metavar='file',
-            help='Uninstall all the packages listed in the given requirements '
-                 'file.  This option can be used multiple times.',
+            metavar="file",
+            help=(
+                "Uninstall all the packages listed in the given requirements "
+                "file.  This option can be used multiple times."
+            ),
        )
        self.cmd_opts.add_option(
-            '-y', '--yes',
-            dest='yes',
-            action='store_true',
-            help="Don't ask for confirmation of uninstall deletions.")
-
+            "-y",
+            "--yes",
+            dest="yes",
+            action="store_true",
+            help="Don't ask for confirmation of uninstall deletions.",
+        )
+        self.cmd_opts.add_option(cmdoptions.root_user_action())
+        self.cmd_opts.add_option(cmdoptions.override_externally_managed())
        self.parser.insert_option_group(0, self.cmd_opts)

    def run(self, options: Values, args: List[str]) -> int:
@@ -57,7 +67,8 @@ class UninstallCommand(Command, SessionCommandMixin):
        reqs_to_uninstall = {}
        for name in args:
            req = install_req_from_line(
-                name, isolated=options.isolated_mode,
+                name,
+                isolated=options.isolated_mode,
            )
            if req.name:
                reqs_to_uninstall[canonicalize_name(req.name)] = req
@@ -70,31 +81,33 @@ class UninstallCommand(Command, SessionCommandMixin):
                )
        for filename in options.requirements:
            for parsed_req in parse_requirements(
-                    filename,
-                    options=options,
-                    session=session):
+                filename, options=options, session=session
+            ):
                req = install_req_from_parsed_requirement(
-                    parsed_req,
-                    isolated=options.isolated_mode
+                    parsed_req, isolated=options.isolated_mode
                )
                if req.name:
                    reqs_to_uninstall[canonicalize_name(req.name)] = req
        if not reqs_to_uninstall:
            raise InstallationError(
-                f'You must give at least one requirement to {self.name} (see '
+                f"You must give at least one requirement to {self.name} (see "
                f'"pip help {self.name}")'
            )

+        if not options.override_externally_managed:
+            check_externally_managed()
+
        protect_pip_from_modification_on_windows(
            modifying_pip="pip" in reqs_to_uninstall
        )

        for req in reqs_to_uninstall.values():
            uninstall_pathset = req.uninstall(
-                auto_confirm=options.yes, verbose=self.verbosity > 0,
+                auto_confirm=options.yes,
+                verbose=self.verbosity > 0,
            )
            if uninstall_pathset:
                uninstall_pathset.commit()
-
+        if options.root_user_action == "warn":
            warn_if_run_as_root()
        return SUCCESS
--- a/venv/Lib/site-packages/pip/_internal/commands/wheel.py
+++ b/venv/Lib/site-packages/pip/_internal/commands/wheel.py
@@ -9,8 +9,11 @@ from pip._internal.cli import cmdoptions
 from pip._internal.cli.req_command import RequirementCommand, with_cleanup
 from pip._internal.cli.status_codes import SUCCESS
 from pip._internal.exceptions import CommandError
-from pip._internal.req.req_install import InstallRequirement
-from pip._internal.req.req_tracker import get_requirement_tracker
+from pip._internal.operations.build.build_tracker import get_build_tracker
+from pip._internal.req.req_install import (
+    InstallRequirement,
+    check_legacy_setup_py_options,
+)
 from pip._internal.utils.misc import ensure_dir, normalize_path
 from pip._internal.utils.temp_dir import TempDirectory
 from pip._internal.wheel_builder import build, should_build_for_wheel_command
@@ -26,10 +29,8 @@ class WheelCommand(RequirementCommand):
    recompiling your software during every install. For more details, see the
    wheel docs: https://wheel.readthedocs.io/en/latest/

-    Requirements: setuptools>=0.8, and wheel.
-
-    'pip wheel' uses the bdist_wheel setuptools extension from the wheel
-    package to build individual wheels.
+    'pip wheel' uses the build system interface as described here:
+    https://pip.pypa.io/en/stable/reference/build-system/

    """

@@ -41,14 +42,16 @@ class WheelCommand(RequirementCommand):
      %prog [options] <archive url/path> ..."""

    def add_options(self) -> None:
-
        self.cmd_opts.add_option(
-            '-w', '--wheel-dir',
-            dest='wheel_dir',
-            metavar='dir',
+            "-w",
+            "--wheel-dir",
+            dest="wheel_dir",
+            metavar="dir",
            default=os.curdir,
-            help=("Build wheels into <dir>, where the default is the "
-                  "current working directory."),
+            help=(
+                "Build wheels into <dir>, where the default is the "
+                "current working directory."
+            ),
        )
        self.cmd_opts.add_option(cmdoptions.no_binary())
        self.cmd_opts.add_option(cmdoptions.only_binary())
@@ -56,32 +59,35 @@ class WheelCommand(RequirementCommand):
        self.cmd_opts.add_option(cmdoptions.no_build_isolation())
        self.cmd_opts.add_option(cmdoptions.use_pep517())
        self.cmd_opts.add_option(cmdoptions.no_use_pep517())
+        self.cmd_opts.add_option(cmdoptions.check_build_deps())
        self.cmd_opts.add_option(cmdoptions.constraints())
        self.cmd_opts.add_option(cmdoptions.editable())
        self.cmd_opts.add_option(cmdoptions.requirements())
        self.cmd_opts.add_option(cmdoptions.src())
        self.cmd_opts.add_option(cmdoptions.ignore_requires_python())
        self.cmd_opts.add_option(cmdoptions.no_deps())
-        self.cmd_opts.add_option(cmdoptions.build_dir())
        self.cmd_opts.add_option(cmdoptions.progress_bar())

        self.cmd_opts.add_option(
-            '--no-verify',
-            dest='no_verify',
-            action='store_true',
+            "--no-verify",
+            dest="no_verify",
+            action="store_true",
            default=False,
            help="Don't verify if built wheel is valid.",
        )

+        self.cmd_opts.add_option(cmdoptions.config_settings())
        self.cmd_opts.add_option(cmdoptions.build_options())
        self.cmd_opts.add_option(cmdoptions.global_options())

        self.cmd_opts.add_option(
-            '--pre',
-            action='store_true',
+            "--pre",
+            action="store_true",
            default=False,
-            help=("Include pre-release and development versions. By default, "
-                  "pip only finds stable versions."),
+            help=(
+                "Include pre-release and development versions. By default, "
+                "pip only finds stable versions."
+            ),
        )

        self.cmd_opts.add_option(cmdoptions.require_hashes())
@@ -96,17 +102,14 @@ class WheelCommand(RequirementCommand):

    @with_cleanup
    def run(self, options: Values, args: List[str]) -> int:
-        cmdoptions.check_install_build_global(options)
-
        session = self.get_default_session(options)

        finder = self._build_package_finder(options, session)
-        wheel_cache = WheelCache(options.cache_dir, options.format_control)

        options.wheel_dir = normalize_path(options.wheel_dir)
        ensure_dir(options.wheel_dir)

-        req_tracker = self.enter_context(get_requirement_tracker())
+        build_tracker = self.enter_context(get_build_tracker())

        directory = TempDirectory(
            delete=not options.no_clean,
@@ -115,15 +118,19 @@ class WheelCommand(RequirementCommand):
        )

        reqs = self.get_requirements(args, options, finder, session)
+        check_legacy_setup_py_options(options, reqs)
+
+        wheel_cache = WheelCache(options.cache_dir)

        preparer = self.make_requirement_preparer(
            temp_build_dir=directory,
            options=options,
-            req_tracker=req_tracker,
+            build_tracker=build_tracker,
            session=session,
            finder=finder,
            download_dir=options.wheel_dir,
            use_user_site=False,
+            verbosity=self.verbosity,
        )

        resolver = self.make_resolver(
@@ -137,9 +144,7 @@ class WheelCommand(RequirementCommand):

        self.trace_basic_info(finder)

-        requirement_set = resolver.resolve(
-            reqs, check_supported_wheels=True
-        )
+        requirement_set = resolver.resolve(reqs, check_supported_wheels=True)

        reqs_to_build: List[InstallRequirement] = []
        for req in requirement_set.requirements.values():
@@ -165,12 +170,11 @@ class WheelCommand(RequirementCommand):
            except OSError as e:
                logger.warning(
                    "Building wheel for %s failed: %s",
-                    req.name, e,
+                    req.name,
+                    e,
                )
                build_failures.append(req)
        if len(build_failures) != 0:
-            raise CommandError(
-                "Failed to build one or more wheels"
-            )
+            raise CommandError("Failed to build one or more wheels")

        return SUCCESS
--- a/venv/Lib/site-packages/pip/_internal/configuration.py
+++ b/venv/Lib/site-packages/pip/_internal/configuration.py
@@ -13,7 +13,6 @@ Some terminology:

 import configparser
 import locale
-import logging
 import os
 import sys
 from typing import Any, Dict, Iterable, List, NewType, Optional, Tuple
@@ -24,12 +23,13 @@ from pip._internal.exceptions import (
 )
 from pip._internal.utils import appdirs
 from pip._internal.utils.compat import WINDOWS
+from pip._internal.utils.logging import getLogger
 from pip._internal.utils.misc import ensure_dir, enum

 RawConfigParser = configparser.RawConfigParser  # Shorthand
 Kind = NewType("Kind", str)

-CONFIG_BASENAME = 'pip.ini' if WINDOWS else 'pip.conf'
+CONFIG_BASENAME = "pip.ini" if WINDOWS else "pip.conf"
 ENV_NAMES_IGNORED = "version", "help"

 # The kinds of configurations there are.
@@ -43,22 +43,19 @@ kinds = enum(
 OVERRIDE_ORDER = kinds.GLOBAL, kinds.USER, kinds.SITE, kinds.ENV, kinds.ENV_VAR
 VALID_LOAD_ONLY = kinds.USER, kinds.GLOBAL, kinds.SITE

-logger = logging.getLogger(__name__)
+logger = getLogger(__name__)


 # NOTE: Maybe use the optionx attribute to normalize keynames.
-def _normalize_name(name):
-    # type: (str) -> str
-    """Make a name consistent regardless of source (environment or file)
-    """
-    name = name.lower().replace('_', '-')
-    if name.startswith('--'):
+def _normalize_name(name: str) -> str:
+    """Make a name consistent regardless of source (environment or file)"""
+    name = name.lower().replace("_", "-")
+    if name.startswith("--"):
        name = name[2:]  # only prefer long opts
    return name


-def _disassemble_key(name):
-    # type: (str) -> List[str]
+def _disassemble_key(name: str) -> List[str]:
    if "." not in name:
        error_message = (
            "Key does not contain dot separated section and key. "
@@ -68,22 +65,18 @@ def _disassemble_key(name):
    return name.split(".", 1)


-def get_configuration_files():
-    # type: () -> Dict[Kind, List[str]]
+def get_configuration_files() -> Dict[Kind, List[str]]:
    global_config_files = [
-        os.path.join(path, CONFIG_BASENAME)
-        for path in appdirs.site_config_dirs('pip')
+        os.path.join(path, CONFIG_BASENAME) for path in appdirs.site_config_dirs("pip")
    ]

    site_config_file = os.path.join(sys.prefix, CONFIG_BASENAME)
    legacy_config_file = os.path.join(
-        os.path.expanduser('~'),
-        'pip' if WINDOWS else '.pip',
+        os.path.expanduser("~"),
+        "pip" if WINDOWS else ".pip",
        CONFIG_BASENAME,
    )
-    new_config_file = os.path.join(
-        appdirs.user_config_dir("pip"), CONFIG_BASENAME
-    )
+    new_config_file = os.path.join(appdirs.user_config_dir("pip"), CONFIG_BASENAME)
    return {
        kinds.GLOBAL: global_config_files,
        kinds.SITE: [site_config_file],
@@ -105,8 +98,7 @@ class Configuration:
    and the data stored is also nice.
    """

-    def __init__(self, isolated, load_only=None):
-        # type: (bool, Optional[Kind]) -> None
+    def __init__(self, isolated: bool, load_only: Optional[Kind] = None) -> None:
        super().__init__()

        if load_only is not None and load_only not in VALID_LOAD_ONLY:
@@ -119,54 +111,50 @@ class Configuration:
        self.load_only = load_only

        # Because we keep track of where we got the data from
-        self._parsers = {
+        self._parsers: Dict[Kind, List[Tuple[str, RawConfigParser]]] = {
            variant: [] for variant in OVERRIDE_ORDER
-        }  # type: Dict[Kind, List[Tuple[str, RawConfigParser]]]
-        self._config = {
+        }
+        self._config: Dict[Kind, Dict[str, Any]] = {
            variant: {} for variant in OVERRIDE_ORDER
-        }  # type: Dict[Kind, Dict[str, Any]]
-        self._modified_parsers = []  # type: List[Tuple[str, RawConfigParser]]
+        }
+        self._modified_parsers: List[Tuple[str, RawConfigParser]] = []

-    def load(self):
-        # type: () -> None
-        """Loads configuration from configuration files and environment
-        """
+    def load(self) -> None:
+        """Loads configuration from configuration files and environment"""
        self._load_config_files()
        if not self.isolated:
            self._load_environment_vars()

-    def get_file_to_edit(self):
-        # type: () -> Optional[str]
-        """Returns the file with highest priority in configuration
-        """
-        assert self.load_only is not None, \
-            "Need to be specified a file to be editing"
+    def get_file_to_edit(self) -> Optional[str]:
+        """Returns the file with highest priority in configuration"""
+        assert self.load_only is not None, "Need to be specified a file to be editing"

        try:
            return self._get_parser_to_modify()[0]
        except IndexError:
            return None

-    def items(self):
-        # type: () -> Iterable[Tuple[str, Any]]
+    def items(self) -> Iterable[Tuple[str, Any]]:
        """Returns key-value pairs like dict.items() representing the loaded
        configuration
        """
        return self._dictionary.items()

-    def get_value(self, key):
-        # type: (str) -> Any
-        """Get a value from the configuration.
-        """
+    def get_value(self, key: str) -> Any:
+        """Get a value from the configuration."""
+        orig_key = key
+        key = _normalize_name(key)
        try:
            return self._dictionary[key]
        except KeyError:
-            raise ConfigurationError(f"No such key - {key}")
+            # disassembling triggers a more useful error message than simply
+            # "No such key" in the case that the key isn't in the form command.option
+            _disassemble_key(key)
+            raise ConfigurationError(f"No such key - {orig_key}")

-    def set_value(self, key, value):
-        # type: (str, Any) -> None
-        """Modify a value in the configuration.
-        """
+    def set_value(self, key: str, value: Any) -> None:
+        """Modify a value in the configuration."""
+        key = _normalize_name(key)
        self._ensure_have_load_only()

        assert self.load_only
@@ -183,21 +171,23 @@ class Configuration:
        self._config[self.load_only][key] = value
        self._mark_as_modified(fname, parser)

-    def unset_value(self, key):
-        # type: (str) -> None
+    def unset_value(self, key: str) -> None:
        """Unset a value in the configuration."""
+        orig_key = key
+        key = _normalize_name(key)
        self._ensure_have_load_only()

        assert self.load_only
        if key not in self._config[self.load_only]:
-            raise ConfigurationError(f"No such key - {key}")
+            raise ConfigurationError(f"No such key - {orig_key}")

        fname, parser = self._get_parser_to_modify()

        if parser is not None:
            section, name = _disassemble_key(key)
-            if not (parser.has_section(section)
-                    and parser.remove_option(section, name)):
+            if not (
+                parser.has_section(section) and parser.remove_option(section, name)
+            ):
                # The option was not removed.
                raise ConfigurationError(
                    "Fatal Internal error [id=1]. Please report as a bug."
@@ -210,10 +200,8 @@ class Configuration:

        del self._config[self.load_only][key]

-    def save(self):
-        # type: () -> None
-        """Save the current in-memory state.
-        """
+    def save(self) -> None:
+        """Save the current in-memory state."""
        self._ensure_have_load_only()

        for fname, parser in self._modified_parsers:
@@ -229,17 +217,14 @@ class Configuration:
    # Private routines
    #

-    def _ensure_have_load_only(self):
-        # type: () -> None
+    def _ensure_have_load_only(self) -> None:
        if self.load_only is None:
            raise ConfigurationError("Needed a specific file to be modifying.")
        logger.debug("Will be working with %s variant only", self.load_only)

    @property
-    def _dictionary(self):
-        # type: () -> Dict[str, Any]
-        """A dictionary representing the loaded configuration.
-        """
+    def _dictionary(self) -> Dict[str, Any]:
+        """A dictionary representing the loaded configuration."""
        # NOTE: Dictionaries are not populated if not loaded. So, conditionals
        #       are not needed here.
        retval = {}
@@ -249,10 +234,8 @@ class Configuration:

        return retval

-    def _load_config_files(self):
-        # type: () -> None
-        """Loads configuration from configuration files
-        """
+    def _load_config_files(self) -> None:
+        """Loads configuration from configuration files"""
        config_files = dict(self.iter_config_files())
        if config_files[kinds.ENV][0:1] == [os.devnull]:
            logger.debug(
@@ -266,9 +249,7 @@ class Configuration:
                # If there's specific variant set in `load_only`, load only
                # that variant, not the others.
                if self.load_only is not None and variant != self.load_only:
-                    logger.debug(
-                        "Skipping file '%s' (variant: %s)", fname, variant
-                    )
+                    logger.debug("Skipping file '%s' (variant: %s)", fname, variant)
                    continue

                parser = self._load_file(variant, fname)
@@ -276,9 +257,8 @@ class Configuration:
                # Keeping track of the parsers used
                self._parsers[variant].append((fname, parser))

-    def _load_file(self, variant, fname):
-        # type: (Kind, str) -> RawConfigParser
-        logger.debug("For variant '%s', will try loading '%s'", variant, fname)
+    def _load_file(self, variant: Kind, fname: str) -> RawConfigParser:
+        logger.verbose("For variant '%s', will try loading '%s'", variant, fname)
        parser = self._construct_parser(fname)

        for section in parser.sections():
@@ -287,22 +267,20 @@ class Configuration:

        return parser

-    def _construct_parser(self, fname):
-        # type: (str) -> RawConfigParser
+    def _construct_parser(self, fname: str) -> RawConfigParser:
        parser = configparser.RawConfigParser()
        # If there is no such file, don't bother reading it but create the
        # parser anyway, to hold the data.
        # Doing this is useful when modifying and saving files, where we don't
        # need to construct a parser.
        if os.path.exists(fname):
+            locale_encoding = locale.getpreferredencoding(False)
            try:
-                parser.read(fname)
+                parser.read(fname, encoding=locale_encoding)
            except UnicodeDecodeError:
                # See https://github.com/pypa/pip/issues/4963
                raise ConfigurationFileCouldNotBeLoaded(
-                    reason="contains invalid {} characters".format(
-                        locale.getpreferredencoding(False)
-                    ),
+                    reason=f"contains invalid {locale_encoding} characters",
                    fname=fname,
                )
            except configparser.Error as error:
@@ -310,16 +288,15 @@ class Configuration:
                raise ConfigurationFileCouldNotBeLoaded(error=error)
        return parser

-    def _load_environment_vars(self):
-        # type: () -> None
-        """Loads configuration from environment variables
-        """
+    def _load_environment_vars(self) -> None:
+        """Loads configuration from environment variables"""
        self._config[kinds.ENV_VAR].update(
            self._normalized_keys(":env:", self.get_environ_vars())
        )

-    def _normalized_keys(self, section, items):
-        # type: (str, Iterable[Tuple[str, Any]]) -> Dict[str, Any]
+    def _normalized_keys(
+        self, section: str, items: Iterable[Tuple[str, Any]]
+    ) -> Dict[str, Any]:
        """Normalizes items to construct a dictionary with normalized keys.

        This routine is where the names become keys and are made the same
@@ -331,8 +308,7 @@ class Configuration:
            normalized[key] = val
        return normalized

-    def get_environ_vars(self):
-        # type: () -> Iterable[Tuple[str, str]]
+    def get_environ_vars(self) -> Iterable[Tuple[str, str]]:
        """Returns a generator with all environmental vars with prefix PIP_"""
        for key, val in os.environ.items():
            if key.startswith("PIP_"):
@@ -341,8 +317,7 @@ class Configuration:
                    yield name, val

    # XXX: This is patched in the tests.
-    def iter_config_files(self):
-        # type: () -> Iterable[Tuple[Kind, List[str]]]
+    def iter_config_files(self) -> Iterable[Tuple[Kind, List[str]]]:
        """Yields variant and configuration files associated with it.

        This should be treated like items of a dictionary.
@@ -350,7 +325,7 @@ class Configuration:
        # SMELL: Move the conditions out of this function

        # environment variables have the lowest priority
-        config_file = os.environ.get('PIP_CONFIG_FILE', None)
+        config_file = os.environ.get("PIP_CONFIG_FILE", None)
        if config_file is not None:
            yield kinds.ENV, [config_file]
        else:
@@ -372,13 +347,11 @@ class Configuration:
        # finally virtualenv configuration first trumping others
        yield kinds.SITE, config_files[kinds.SITE]

-    def get_values_in_config(self, variant):
-        # type: (Kind) -> Dict[str, Any]
+    def get_values_in_config(self, variant: Kind) -> Dict[str, Any]:
        """Get values present in a config file"""
        return self._config[variant]

-    def _get_parser_to_modify(self):
-        # type: () -> Tuple[str, RawConfigParser]
+    def _get_parser_to_modify(self) -> Tuple[str, RawConfigParser]:
        # Determine which parser to modify
        assert self.load_only
        parsers = self._parsers[self.load_only]
@@ -392,12 +365,10 @@ class Configuration:
        return parsers[-1]

    # XXX: This is patched in the tests.
-    def _mark_as_modified(self, fname, parser):
-        # type: (str, RawConfigParser) -> None
+    def _mark_as_modified(self, fname: str, parser: RawConfigParser) -> None:
        file_parser_tuple = (fname, parser)
        if file_parser_tuple not in self._modified_parsers:
            self._modified_parsers.append(file_parser_tuple)

-    def __repr__(self):
-        # type: () -> str
+    def __repr__(self) -> str:
        return f"{self.__class__.__name__}({self._dictionary!r})"
--- a/venv/Lib/site-packages/pip/_internal/distributions/base.py
+++ b/venv/Lib/site-packages/pip/_internal/distributions/base.py
@@ -1,9 +1,7 @@
 import abc
-from typing import Optional
-
-from pip._vendor.pkg_resources import Distribution

 from pip._internal.index.package_finder import PackageFinder
+from pip._internal.metadata.base import BaseDistribution
 from pip._internal.req import InstallRequirement


@@ -28,11 +26,14 @@ class AbstractDistribution(metaclass=abc.ABCMeta):
        self.req = req

    @abc.abstractmethod
-    def get_pkg_resources_distribution(self) -> Optional[Distribution]:
+    def get_metadata_distribution(self) -> BaseDistribution:
        raise NotImplementedError()

    @abc.abstractmethod
    def prepare_distribution_metadata(
-        self, finder: PackageFinder, build_isolation: bool
+        self,
+        finder: PackageFinder,
+        build_isolation: bool,
+        check_build_deps: bool,
    ) -> None:
        raise NotImplementedError()
--- a/venv/Lib/site-packages/pip/_internal/distributions/installed.py
+++ b/venv/Lib/site-packages/pip/_internal/distributions/installed.py
@@ -1,9 +1,6 @@
-from typing import Optional
-
-from pip._vendor.pkg_resources import Distribution
-
 from pip._internal.distributions.base import AbstractDistribution
 from pip._internal.index.package_finder import PackageFinder
+from pip._internal.metadata import BaseDistribution


 class InstalledDistribution(AbstractDistribution):
@@ -13,10 +10,14 @@ class InstalledDistribution(AbstractDistribution):
    been computed.
    """

-    def get_pkg_resources_distribution(self) -> Optional[Distribution]:
+    def get_metadata_distribution(self) -> BaseDistribution:
+        assert self.req.satisfied_by is not None, "not actually installed"
        return self.req.satisfied_by

    def prepare_distribution_metadata(
-        self, finder: PackageFinder, build_isolation: bool
+        self,
+        finder: PackageFinder,
+        build_isolation: bool,
+        check_build_deps: bool,
    ) -> None:
        pass
--- a/venv/Lib/site-packages/pip/_internal/distributions/sdist.py
+++ b/venv/Lib/site-packages/pip/_internal/distributions/sdist.py
@@ -1,12 +1,11 @@
 import logging
-from typing import Set, Tuple
-
-from pip._vendor.pkg_resources import Distribution
+from typing import Iterable, Set, Tuple

 from pip._internal.build_env import BuildEnvironment
 from pip._internal.distributions.base import AbstractDistribution
 from pip._internal.exceptions import InstallationError
 from pip._internal.index.package_finder import PackageFinder
+from pip._internal.metadata import BaseDistribution
 from pip._internal.utils.subprocess import runner_with_spinner_message

 logger = logging.getLogger(__name__)
@@ -19,11 +18,14 @@ class SourceDistribution(AbstractDistribution):
    generated, either using PEP 517 or using the legacy `setup.py egg_info`.
    """

-    def get_pkg_resources_distribution(self) -> Distribution:
+    def get_metadata_distribution(self) -> BaseDistribution:
        return self.req.get_dist()

    def prepare_distribution_metadata(
-        self, finder: PackageFinder, build_isolation: bool
+        self,
+        finder: PackageFinder,
+        build_isolation: bool,
+        check_build_deps: bool,
    ) -> None:
        # Load pyproject.toml, to determine whether PEP 517 is to be used
        self.req.load_pyproject_toml()
@@ -31,28 +33,34 @@ class SourceDistribution(AbstractDistribution):
        # Set up the build isolation, if this requirement should be isolated
        should_isolate = self.req.use_pep517 and build_isolation
        if should_isolate:
-            self._setup_isolation(finder)
-
+            # Setup an isolated environment and install the build backend static
+            # requirements in it.
+            self._prepare_build_backend(finder)
+            # Check that if the requirement is editable, it either supports PEP 660 or
+            # has a setup.py or a setup.cfg. This cannot be done earlier because we need
+            # to setup the build backend to verify it supports build_editable, nor can
+            # it be done later, because we want to avoid installing build requirements
+            # needlessly. Doing it here also works around setuptools generating
+            # UNKNOWN.egg-info when running get_requires_for_build_wheel on a directory
+            # without setup.py nor setup.cfg.
+            self.req.isolated_editable_sanity_check()
+            # Install the dynamic build requirements.
+            self._install_build_reqs(finder)
+        # Check if the current environment provides build dependencies
+        should_check_deps = self.req.use_pep517 and check_build_deps
+        if should_check_deps:
+            pyproject_requires = self.req.pyproject_requires
+            assert pyproject_requires is not None
+            conflicting, missing = self.req.build_env.check_requirements(
+                pyproject_requires
+            )
+            if conflicting:
+                self._raise_conflicts("the backend dependencies", conflicting)
+            if missing:
+                self._raise_missing_reqs(missing)
        self.req.prepare_metadata()

-    def _setup_isolation(self, finder: PackageFinder) -> None:
-        def _raise_conflicts(
-            conflicting_with: str, conflicting_reqs: Set[Tuple[str, str]]
-        ) -> None:
-            format_string = (
-                "Some build dependencies for {requirement} "
-                "conflict with {conflicting_with}: {description}."
-            )
-            error_message = format_string.format(
-                requirement=self.req,
-                conflicting_with=conflicting_with,
-                description=", ".join(
-                    f"{installed} is incompatible with {wanted}"
-                    for installed, wanted in sorted(conflicting)
-                ),
-            )
-            raise InstallationError(error_message)
-
+    def _prepare_build_backend(self, finder: PackageFinder) -> None:
        # Isolate in a BuildEnvironment and install the build-time
        # requirements.
        pyproject_requires = self.req.pyproject_requires
@@ -60,13 +68,13 @@ class SourceDistribution(AbstractDistribution):

        self.req.build_env = BuildEnvironment()
        self.req.build_env.install_requirements(
-            finder, pyproject_requires, "overlay", "Installing build dependencies"
+            finder, pyproject_requires, "overlay", kind="build dependencies"
        )
        conflicting, missing = self.req.build_env.check_requirements(
            self.req.requirements_to_check
        )
        if conflicting:
-            _raise_conflicts("PEP 517/518 supported requirements", conflicting)
+            self._raise_conflicts("PEP 517/518 supported requirements", conflicting)
        if missing:
            logger.warning(
                "Missing build requirements in pyproject.toml for %s.",
@@ -77,19 +85,66 @@ class SourceDistribution(AbstractDistribution):
                "pip cannot fall back to setuptools without %s.",
                " and ".join(map(repr, sorted(missing))),
            )
-        # Install any extra build dependencies that the backend requests.
-        # This must be done in a second pass, as the pyproject.toml
-        # dependencies must be installed before we can call the backend.
+
+    def _get_build_requires_wheel(self) -> Iterable[str]:
        with self.req.build_env:
            runner = runner_with_spinner_message("Getting requirements to build wheel")
            backend = self.req.pep517_backend
            assert backend is not None
            with backend.subprocess_runner(runner):
-                reqs = backend.get_requires_for_build_wheel()
+                return backend.get_requires_for_build_wheel()

-        conflicting, missing = self.req.build_env.check_requirements(reqs)
-        if conflicting:
-            _raise_conflicts("the backend dependencies", conflicting)
-        self.req.build_env.install_requirements(
-            finder, missing, "normal", "Installing backend dependencies"
+    def _get_build_requires_editable(self) -> Iterable[str]:
+        with self.req.build_env:
+            runner = runner_with_spinner_message(
+                "Getting requirements to build editable"
            )
+            backend = self.req.pep517_backend
+            assert backend is not None
+            with backend.subprocess_runner(runner):
+                return backend.get_requires_for_build_editable()
+
+    def _install_build_reqs(self, finder: PackageFinder) -> None:
+        # Install any extra build dependencies that the backend requests.
+        # This must be done in a second pass, as the pyproject.toml
+        # dependencies must be installed before we can call the backend.
+        if (
+            self.req.editable
+            and self.req.permit_editable_wheels
+            and self.req.supports_pyproject_editable()
+        ):
+            build_reqs = self._get_build_requires_editable()
+        else:
+            build_reqs = self._get_build_requires_wheel()
+        conflicting, missing = self.req.build_env.check_requirements(build_reqs)
+        if conflicting:
+            self._raise_conflicts("the backend dependencies", conflicting)
+        self.req.build_env.install_requirements(
+            finder, missing, "normal", kind="backend dependencies"
+        )
+
+    def _raise_conflicts(
+        self, conflicting_with: str, conflicting_reqs: Set[Tuple[str, str]]
+    ) -> None:
+        format_string = (
+            "Some build dependencies for {requirement} "
+            "conflict with {conflicting_with}: {description}."
+        )
+        error_message = format_string.format(
+            requirement=self.req,
+            conflicting_with=conflicting_with,
+            description=", ".join(
+                f"{installed} is incompatible with {wanted}"
+                for installed, wanted in sorted(conflicting_reqs)
+            ),
+        )
+        raise InstallationError(error_message)
+
+    def _raise_missing_reqs(self, missing: Set[str]) -> None:
+        format_string = (
+            "Some build dependencies for {requirement} are missing: {missing}."
+        )
+        error_message = format_string.format(
+            requirement=self.req, missing=", ".join(map(repr, sorted(missing)))
+        )
+        raise InstallationError(error_message)
--- a/venv/Lib/site-packages/pip/_internal/distributions/wheel.py
+++ b/venv/Lib/site-packages/pip/_internal/distributions/wheel.py
@@ -1,10 +1,12 @@
-from zipfile import ZipFile
-
-from pip._vendor.pkg_resources import Distribution
+from pip._vendor.packaging.utils import canonicalize_name

 from pip._internal.distributions.base import AbstractDistribution
 from pip._internal.index.package_finder import PackageFinder
-from pip._internal.utils.wheel import pkg_resources_distribution_for_wheel
+from pip._internal.metadata import (
+    BaseDistribution,
+    FilesystemWheel,
+    get_wheel_distribution,
+)


 class WheelDistribution(AbstractDistribution):
@@ -13,22 +15,20 @@ class WheelDistribution(AbstractDistribution):
    This does not need any preparation as wheels can be directly unpacked.
    """

-    def get_pkg_resources_distribution(self) -> Distribution:
+    def get_metadata_distribution(self) -> BaseDistribution:
        """Loads the metadata from the wheel file into memory and returns a
        Distribution that uses it, not relying on the wheel file or
        requirement.
        """
-        # Set as part of preparation during download.
-        assert self.req.local_file_path
-        # Wheels are never unnamed.
-        assert self.req.name
-
-        with ZipFile(self.req.local_file_path, allowZip64=True) as z:
-            return pkg_resources_distribution_for_wheel(
-                z, self.req.name, self.req.local_file_path
-            )
+        assert self.req.local_file_path, "Set as part of preparation during download"
+        assert self.req.name, "Wheels are never unnamed"
+        wheel = FilesystemWheel(self.req.local_file_path)
+        return get_wheel_distribution(wheel, canonicalize_name(self.req.name))

    def prepare_distribution_metadata(
-        self, finder: PackageFinder, build_isolation: bool
+        self,
+        finder: PackageFinder,
+        build_isolation: bool,
+        check_build_deps: bool,
    ) -> None:
        pass
--- a/venv/Lib/site-packages/pip/_internal/exceptions.py
+++ b/venv/Lib/site-packages/pip/_internal/exceptions.py
@@ -1,22 +1,181 @@
-"""Exceptions used throughout package"""
+"""Exceptions used throughout package.
+
+This module MUST NOT try to import from anything within `pip._internal` to
+operate. This is expected to be importable from any/all files within the
+subpackage and, thus, should not depend on them.
+"""

 import configparser
+import contextlib
+import locale
+import logging
+import pathlib
+import re
+import sys
 from itertools import chain, groupby, repeat
-from typing import TYPE_CHECKING, Dict, List, Optional
+from typing import TYPE_CHECKING, Dict, Iterator, List, Optional, Union

-from pip._vendor.pkg_resources import Distribution
 from pip._vendor.requests.models import Request, Response
+from pip._vendor.rich.console import Console, ConsoleOptions, RenderResult
+from pip._vendor.rich.markup import escape
+from pip._vendor.rich.text import Text

 if TYPE_CHECKING:
    from hashlib import _Hash
+    from typing import Literal

+    from pip._internal.metadata import BaseDistribution
    from pip._internal.req.req_install import InstallRequirement

+logger = logging.getLogger(__name__)
+
+
+#
+# Scaffolding
+#
+def _is_kebab_case(s: str) -> bool:
+    return re.match(r"^[a-z]+(-[a-z]+)*$", s) is not None
+
+
+def _prefix_with_indent(
+    s: Union[Text, str],
+    console: Console,
+    *,
+    prefix: str,
+    indent: str,
+) -> Text:
+    if isinstance(s, Text):
+        text = s
+    else:
+        text = console.render_str(s)
+
+    return console.render_str(prefix, overflow="ignore") + console.render_str(
+        f"\n{indent}", overflow="ignore"
+    ).join(text.split(allow_blank=True))
+

 class PipError(Exception):
-    """Base pip exception"""
+    """The base pip error."""


+class DiagnosticPipError(PipError):
+    """An error, that presents diagnostic information to the user.
+
+    This contains a bunch of logic, to enable pretty presentation of our error
+    messages. Each error gets a unique reference. Each error can also include
+    additional context, a hint and/or a note -- which are presented with the
+    main error message in a consistent style.
+
+    This is adapted from the error output styling in `sphinx-theme-builder`.
+    """
+
+    reference: str
+
+    def __init__(
+        self,
+        *,
+        kind: 'Literal["error", "warning"]' = "error",
+        reference: Optional[str] = None,
+        message: Union[str, Text],
+        context: Optional[Union[str, Text]],
+        hint_stmt: Optional[Union[str, Text]],
+        note_stmt: Optional[Union[str, Text]] = None,
+        link: Optional[str] = None,
+    ) -> None:
+        # Ensure a proper reference is provided.
+        if reference is None:
+            assert hasattr(self, "reference"), "error reference not provided!"
+            reference = self.reference
+        assert _is_kebab_case(reference), "error reference must be kebab-case!"
+
+        self.kind = kind
+        self.reference = reference
+
+        self.message = message
+        self.context = context
+
+        self.note_stmt = note_stmt
+        self.hint_stmt = hint_stmt
+
+        self.link = link
+
+        super().__init__(f"<{self.__class__.__name__}: {self.reference}>")
+
+    def __repr__(self) -> str:
+        return (
+            f"<{self.__class__.__name__}("
+            f"reference={self.reference!r}, "
+            f"message={self.message!r}, "
+            f"context={self.context!r}, "
+            f"note_stmt={self.note_stmt!r}, "
+            f"hint_stmt={self.hint_stmt!r}"
+            ")>"
+        )
+
+    def __rich_console__(
+        self,
+        console: Console,
+        options: ConsoleOptions,
+    ) -> RenderResult:
+        colour = "red" if self.kind == "error" else "yellow"
+
+        yield f"[{colour} bold]{self.kind}[/]: [bold]{self.reference}[/]"
+        yield ""
+
+        if not options.ascii_only:
+            # Present the main message, with relevant context indented.
+            if self.context is not None:
+                yield _prefix_with_indent(
+                    self.message,
+                    console,
+                    prefix=f"[{colour}]×[/] ",
+                    indent=f"[{colour}]│[/] ",
+                )
+                yield _prefix_with_indent(
+                    self.context,
+                    console,
+                    prefix=f"[{colour}]╰─>[/] ",
+                    indent=f"[{colour}]   [/] ",
+                )
+            else:
+                yield _prefix_with_indent(
+                    self.message,
+                    console,
+                    prefix="[red]×[/] ",
+                    indent="  ",
+                )
+        else:
+            yield self.message
+            if self.context is not None:
+                yield ""
+                yield self.context
+
+        if self.note_stmt is not None or self.hint_stmt is not None:
+            yield ""
+
+        if self.note_stmt is not None:
+            yield _prefix_with_indent(
+                self.note_stmt,
+                console,
+                prefix="[magenta bold]note[/]: ",
+                indent="      ",
+            )
+        if self.hint_stmt is not None:
+            yield _prefix_with_indent(
+                self.hint_stmt,
+                console,
+                prefix="[cyan bold]hint[/]: ",
+                indent="      ",
+            )
+
+        if self.link is not None:
+            yield ""
+            yield f"Link: {self.link}"
+
+
+#
+# Actual Errors
+#
 class ConfigurationError(PipError):
    """General exception in configuration"""

@@ -29,17 +188,54 @@ class UninstallationError(PipError):
    """General exception during uninstallation"""


+class MissingPyProjectBuildRequires(DiagnosticPipError):
+    """Raised when pyproject.toml has `build-system`, but no `build-system.requires`."""
+
+    reference = "missing-pyproject-build-system-requires"
+
+    def __init__(self, *, package: str) -> None:
+        super().__init__(
+            message=f"Can not process {escape(package)}",
+            context=Text(
+                "This package has an invalid pyproject.toml file.\n"
+                "The [build-system] table is missing the mandatory `requires` key."
+            ),
+            note_stmt="This is an issue with the package mentioned above, not pip.",
+            hint_stmt=Text("See PEP 518 for the detailed specification."),
+        )
+
+
+class InvalidPyProjectBuildRequires(DiagnosticPipError):
+    """Raised when pyproject.toml an invalid `build-system.requires`."""
+
+    reference = "invalid-pyproject-build-system-requires"
+
+    def __init__(self, *, package: str, reason: str) -> None:
+        super().__init__(
+            message=f"Can not process {escape(package)}",
+            context=Text(
+                "This package has an invalid `build-system.requires` key in "
+                f"pyproject.toml.\n{reason}"
+            ),
+            note_stmt="This is an issue with the package mentioned above, not pip.",
+            hint_stmt=Text("See PEP 518 for the detailed specification."),
+        )
+
+
 class NoneMetadataError(PipError):
-    """
-    Raised when accessing "METADATA" or "PKG-INFO" metadata for a
-    pip._vendor.pkg_resources.Distribution object and
-    `dist.has_metadata('METADATA')` returns True but
-    `dist.get_metadata('METADATA')` returns None (and similarly for
-    "PKG-INFO").
+    """Raised when accessing a Distribution's "METADATA" or "PKG-INFO".
+
+    This signifies an inconsistency, when the Distribution claims to have
+    the metadata file (if not, raise ``FileNotFoundError`` instead), but is
+    not actually able to produce its content. This may be due to permission
+    errors.
    """

-    def __init__(self, dist, metadata_name):
-        # type: (Distribution, str) -> None
+    def __init__(
+        self,
+        dist: "BaseDistribution",
+        metadata_name: str,
+    ) -> None:
        """
        :param dist: A Distribution object.
        :param metadata_name: The name of the metadata being accessed
@@ -48,28 +244,24 @@ class NoneMetadataError(PipError):
        self.dist = dist
        self.metadata_name = metadata_name

-    def __str__(self):
-        # type: () -> str
+    def __str__(self) -> str:
        # Use `dist` in the error message because its stringification
        # includes more information, like the version and location.
-        return (
-            'None {} metadata found for distribution: {}'.format(
-                self.metadata_name, self.dist,
-            )
+        return "None {} metadata found for distribution: {}".format(
+            self.metadata_name,
+            self.dist,
        )


 class UserInstallationInvalid(InstallationError):
    """A --user install is requested on an environment without user site."""

-    def __str__(self):
-        # type: () -> str
+    def __str__(self) -> str:
        return "User base directory is not specified"


 class InvalidSchemeCombination(InstallationError):
-    def __str__(self):
-        # type: () -> str
+    def __str__(self) -> str:
        before = ", ".join(str(a) for a in self.args[:-1])
        return f"Cannot set {before} and {self.args[-1]} together"

@@ -102,8 +294,12 @@ class PreviousBuildDirError(PipError):
 class NetworkConnectionError(PipError):
    """HTTP connection error"""

-    def __init__(self, error_msg, response=None, request=None):
-        # type: (str, Response, Request) -> None
+    def __init__(
+        self,
+        error_msg: str,
+        response: Optional[Response] = None,
+        request: Optional[Request] = None,
+    ) -> None:
        """
        Initialize NetworkConnectionError with  `request` and `response`
        objects.
@@ -111,13 +307,15 @@ class NetworkConnectionError(PipError):
        self.response = response
        self.request = request
        self.error_msg = error_msg
-        if (self.response is not None and not self.request and
-                hasattr(response, 'request')):
+        if (
+            self.response is not None
+            and not self.request
+            and hasattr(response, "request")
+        ):
            self.request = self.response.request
        super().__init__(error_msg, response, request)

-    def __str__(self):
-        # type: () -> str
+    def __str__(self) -> str:
        return str(self.error_msg)


@@ -129,74 +327,122 @@ class UnsupportedWheel(InstallationError):
    """Unsupported wheel."""


+class InvalidWheel(InstallationError):
+    """Invalid (e.g. corrupt) wheel."""
+
+    def __init__(self, location: str, name: str):
+        self.location = location
+        self.name = name
+
+    def __str__(self) -> str:
+        return f"Wheel '{self.name}' located at {self.location} is invalid."
+
+
 class MetadataInconsistent(InstallationError):
    """Built metadata contains inconsistent information.

    This is raised when the metadata contains values (e.g. name and version)
-    that do not match the information previously obtained from sdist filename
-    or user-supplied ``#egg=`` value.
+    that do not match the information previously obtained from sdist filename,
+    user-supplied ``#egg=`` value, or an install requirement name.
    """
-    def __init__(self, ireq, field, f_val, m_val):
-        # type: (InstallRequirement, str, str, str) -> None
+
+    def __init__(
+        self, ireq: "InstallRequirement", field: str, f_val: str, m_val: str
+    ) -> None:
        self.ireq = ireq
        self.field = field
        self.f_val = f_val
        self.m_val = m_val

-    def __str__(self):
-        # type: () -> str
-        template = (
-            "Requested {} has inconsistent {}: "
-            "filename has {!r}, but metadata has {!r}"
-        )
-        return template.format(self.ireq, self.field, self.f_val, self.m_val)
-
-
-class InstallationSubprocessError(InstallationError):
-    """A subprocess call failed during installation."""
-    def __init__(self, returncode, description):
-        # type: (int, str) -> None
-        self.returncode = returncode
-        self.description = description
-
-    def __str__(self):
-        # type: () -> str
+    def __str__(self) -> str:
        return (
-            "Command errored out with exit status {}: {} "
-            "Check the logs for full command output."
-        ).format(self.returncode, self.description)
+            f"Requested {self.ireq} has inconsistent {self.field}: "
+            f"expected {self.f_val!r}, but metadata has {self.m_val!r}"
+        )
+
+
+class InstallationSubprocessError(DiagnosticPipError, InstallationError):
+    """A subprocess call failed."""
+
+    reference = "subprocess-exited-with-error"
+
+    def __init__(
+        self,
+        *,
+        command_description: str,
+        exit_code: int,
+        output_lines: Optional[List[str]],
+    ) -> None:
+        if output_lines is None:
+            output_prompt = Text("See above for output.")
+        else:
+            output_prompt = (
+                Text.from_markup(f"[red][{len(output_lines)} lines of output][/]\n")
+                + Text("".join(output_lines))
+                + Text.from_markup(R"[red]\[end of output][/]")
+            )
+
+        super().__init__(
+            message=(
+                f"[green]{escape(command_description)}[/] did not run successfully.\n"
+                f"exit code: {exit_code}"
+            ),
+            context=output_prompt,
+            hint_stmt=None,
+            note_stmt=(
+                "This error originates from a subprocess, and is likely not a "
+                "problem with pip."
+            ),
+        )
+
+        self.command_description = command_description
+        self.exit_code = exit_code
+
+    def __str__(self) -> str:
+        return f"{self.command_description} exited with {self.exit_code}"
+
+
+class MetadataGenerationFailed(InstallationSubprocessError, InstallationError):
+    reference = "metadata-generation-failed"
+
+    def __init__(
+        self,
+        *,
+        package_details: str,
+    ) -> None:
+        super(InstallationSubprocessError, self).__init__(
+            message="Encountered error while generating package metadata.",
+            context=escape(package_details),
+            hint_stmt="See above for details.",
+            note_stmt="This is an issue with the package mentioned above, not pip.",
+        )
+
+    def __str__(self) -> str:
+        return "metadata generation failed"


 class HashErrors(InstallationError):
    """Multiple HashError instances rolled into one for reporting"""

-    def __init__(self):
-        # type: () -> None
-        self.errors = []  # type: List[HashError]
+    def __init__(self) -> None:
+        self.errors: List["HashError"] = []

-    def append(self, error):
-        # type: (HashError) -> None
+    def append(self, error: "HashError") -> None:
        self.errors.append(error)

-    def __str__(self):
-        # type: () -> str
+    def __str__(self) -> str:
        lines = []
        self.errors.sort(key=lambda e: e.order)
        for cls, errors_of_cls in groupby(self.errors, lambda e: e.__class__):
            lines.append(cls.head)
            lines.extend(e.body() for e in errors_of_cls)
        if lines:
-            return '\n'.join(lines)
-        return ''
+            return "\n".join(lines)
+        return ""

-    def __nonzero__(self):
-        # type: () -> bool
+    def __bool__(self) -> bool:
        return bool(self.errors)

-    def __bool__(self):
-        # type: () -> bool
-        return self.__nonzero__()
-

 class HashError(InstallationError):
    """
@@ -214,12 +460,12 @@ class HashError(InstallationError):
        typically available earlier.

    """
-    req = None  # type: Optional[InstallRequirement]
-    head = ''
-    order = -1  # type: int

-    def body(self):
-        # type: () -> str
+    req: Optional["InstallRequirement"] = None
+    head = ""
+    order: int = -1
+
+    def body(self) -> str:
        """Return a summary of me for display under the heading.

        This default implementation simply prints a description of the
@@ -229,21 +475,19 @@ class HashError(InstallationError):
            its link already populated by the resolver's _populate_link().

        """
-        return f'    {self._requirement_name()}'
+        return f"    {self._requirement_name()}"

-    def __str__(self):
-        # type: () -> str
-        return f'{self.head}\n{self.body()}'
+    def __str__(self) -> str:
+        return f"{self.head}\n{self.body()}"

-    def _requirement_name(self):
-        # type: () -> str
+    def _requirement_name(self) -> str:
        """Return a description of the requirement that triggered me.

        This default implementation returns long description of the req, with
        line numbers

        """
-        return str(self.req) if self.req else 'unknown package'
+        return str(self.req) if self.req else "unknown package"


 class VcsHashUnsupported(HashError):
@@ -251,8 +495,10 @@ class VcsHashUnsupported(HashError):
    we don't have a method for hashing those."""

    order = 0
-    head = ("Can't verify hashes for these requirements because we don't "
-            "have a way to hash version control repositories:")
+    head = (
+        "Can't verify hashes for these requirements because we don't "
+        "have a way to hash version control repositories:"
+    )


 class DirectoryUrlHashUnsupported(HashError):
@@ -260,32 +506,34 @@ class DirectoryUrlHashUnsupported(HashError):
    we don't have a method for hashing those."""

    order = 1
-    head = ("Can't verify hashes for these file:// requirements because they "
-            "point to directories:")
+    head = (
+        "Can't verify hashes for these file:// requirements because they "
+        "point to directories:"
+    )


 class HashMissing(HashError):
    """A hash was needed for a requirement but is absent."""

    order = 2
-    head = ('Hashes are required in --require-hashes mode, but they are '
-            'missing from some requirements. Here is a list of those '
-            'requirements along with the hashes their downloaded archives '
-            'actually had. Add lines like these to your requirements files to '
-            'prevent tampering. (If you did not enable --require-hashes '
-            'manually, note that it turns on automatically when any package '
-            'has a hash.)')
+    head = (
+        "Hashes are required in --require-hashes mode, but they are "
+        "missing from some requirements. Here is a list of those "
+        "requirements along with the hashes their downloaded archives "
+        "actually had. Add lines like these to your requirements files to "
+        "prevent tampering. (If you did not enable --require-hashes "
+        "manually, note that it turns on automatically when any package "
+        "has a hash.)"
+    )

-    def __init__(self, gotten_hash):
-        # type: (str) -> None
+    def __init__(self, gotten_hash: str) -> None:
        """
        :param gotten_hash: The hash of the (possibly malicious) archive we
            just downloaded
        """
        self.gotten_hash = gotten_hash

-    def body(self):
-        # type: () -> str
+    def body(self) -> str:
        # Dodge circular import.
        from pip._internal.utils.hashes import FAVORITE_HASH

@@ -294,13 +542,16 @@ class HashMissing(HashError):
            # In the case of URL-based requirements, display the original URL
            # seen in the requirements file rather than the package name,
            # so the output can be directly copied into the requirements file.
-            package = (self.req.original_link if self.req.original_link
+            package = (
+                self.req.original_link
+                if self.req.original_link
                # In case someone feeds something downright stupid
                # to InstallRequirement's constructor.
-                       else getattr(self.req, 'req', None))
-        return '    {} --hash={}:{}'.format(package or 'unknown package',
-                                            FAVORITE_HASH,
-                                            self.gotten_hash)
+                else getattr(self.req, "req", None)
+            )
+        return "    {} --hash={}:{}".format(
+            package or "unknown package", FAVORITE_HASH, self.gotten_hash
+        )


 class HashUnpinned(HashError):
@@ -308,8 +559,10 @@ class HashUnpinned(HashError):
    version."""

    order = 3
-    head = ('In --require-hashes mode, all requirements must have their '
-            'versions pinned with ==. These do not:')
+    head = (
+        "In --require-hashes mode, all requirements must have their "
+        "versions pinned with ==. These do not:"
+    )


 class HashMismatch(HashError):
@@ -321,14 +574,16 @@ class HashMismatch(HashError):
        improve its error message.

    """
-    order = 4
-    head = ('THESE PACKAGES DO NOT MATCH THE HASHES FROM THE REQUIREMENTS '
-            'FILE. If you have updated the package versions, please update '
-            'the hashes. Otherwise, examine the package contents carefully; '
-            'someone may have tampered with them.')

-    def __init__(self, allowed, gots):
-        # type: (Dict[str, List[str]], Dict[str, _Hash]) -> None
+    order = 4
+    head = (
+        "THESE PACKAGES DO NOT MATCH THE HASHES FROM THE REQUIREMENTS "
+        "FILE. If you have updated the package versions, please update "
+        "the hashes. Otherwise, examine the package contents carefully; "
+        "someone may have tampered with them."
+    )
+
+    def __init__(self, allowed: Dict[str, List[str]], gots: Dict[str, "_Hash"]) -> None:
        """
        :param allowed: A dict of algorithm names pointing to lists of allowed
            hex digests
@@ -338,13 +593,10 @@ class HashMismatch(HashError):
        self.allowed = allowed
        self.gots = gots

-    def body(self):
-        # type: () -> str
-        return '    {}:\n{}'.format(self._requirement_name(),
-                                    self._hash_comparison())
+    def body(self) -> str:
+        return "    {}:\n{}".format(self._requirement_name(), self._hash_comparison())

-    def _hash_comparison(self):
-        # type: () -> str
+    def _hash_comparison(self) -> str:
        """
        Return a comparison of actual and expected hash values.

@@ -355,20 +607,22 @@ class HashMismatch(HashError):
                    Got        bcdefbcdefbcdefbcdefbcdefbcdefbcdefbcdefbcdef

        """
-        def hash_then_or(hash_name):
-            # type: (str) -> chain[str]
+
+        def hash_then_or(hash_name: str) -> "chain[str]":
            # For now, all the decent hashes have 6-char names, so we can get
            # away with hard-coding space literals.
-            return chain([hash_name], repeat('    or'))
+            return chain([hash_name], repeat("    or"))

-        lines = []  # type: List[str]
+        lines: List[str] = []
        for hash_name, expecteds in self.allowed.items():
            prefix = hash_then_or(hash_name)
-            lines.extend(('        Expected {} {}'.format(next(prefix), e))
-                         for e in expecteds)
-            lines.append('             Got        {}\n'.format(
-                         self.gots[hash_name].hexdigest()))
-        return '\n'.join(lines)
+            lines.extend(
+                ("        Expected {} {}".format(next(prefix), e)) for e in expecteds
+            )
+            lines.append(
+                "             Got        {}\n".format(self.gots[hash_name].hexdigest())
+            )
+        return "\n".join(lines)


 class UnsupportedPythonVersion(InstallationError):
@@ -377,21 +631,103 @@ class UnsupportedPythonVersion(InstallationError):


 class ConfigurationFileCouldNotBeLoaded(ConfigurationError):
-    """When there are errors while loading a configuration file
-    """
+    """When there are errors while loading a configuration file"""

-    def __init__(self, reason="could not be loaded", fname=None, error=None):
-        # type: (str, Optional[str], Optional[configparser.Error]) -> None
+    def __init__(
+        self,
+        reason: str = "could not be loaded",
+        fname: Optional[str] = None,
+        error: Optional[configparser.Error] = None,
+    ) -> None:
        super().__init__(error)
        self.reason = reason
        self.fname = fname
        self.error = error

-    def __str__(self):
-        # type: () -> str
+    def __str__(self) -> str:
        if self.fname is not None:
            message_part = f" in {self.fname}."
        else:
            assert self.error is not None
            message_part = f".\n{self.error}\n"
        return f"Configuration file {self.reason}{message_part}"
+
+
+_DEFAULT_EXTERNALLY_MANAGED_ERROR = f"""\
+The Python environment under {sys.prefix} is managed externally, and may not be
+manipulated by the user. Please use specific tooling from the distributor of
+the Python installation to interact with this environment instead.
+"""
+
+
+class ExternallyManagedEnvironment(DiagnosticPipError):
+    """The current environment is externally managed.
+
+    This is raised when the current environment is externally managed, as
+    defined by `PEP 668`_. The ``EXTERNALLY-MANAGED`` configuration is checked
+    and displayed when the error is bubbled up to the user.
+
+    :param error: The error message read from ``EXTERNALLY-MANAGED``.
+    """
+
+    reference = "externally-managed-environment"
+
+    def __init__(self, error: Optional[str]) -> None:
+        if error is None:
+            context = Text(_DEFAULT_EXTERNALLY_MANAGED_ERROR)
+        else:
+            context = Text(error)
+        super().__init__(
+            message="This environment is externally managed",
+            context=context,
+            note_stmt=(
+                "If you believe this is a mistake, please contact your "
+                "Python installation or OS distribution provider. "
+                "You can override this, at the risk of breaking your Python "
+                "installation or OS, by passing --break-system-packages."
+            ),
+            hint_stmt=Text("See PEP 668 for the detailed specification."),
+        )
+
+    @staticmethod
+    def _iter_externally_managed_error_keys() -> Iterator[str]:
+        # LC_MESSAGES is in POSIX, but not the C standard. The most common
+        # platform that does not implement this category is Windows, where
+        # using other categories for console message localization is equally
+        # unreliable, so we fall back to the locale-less vendor message. This
+        # can always be re-evaluated when a vendor proposes a new alternative.
+        try:
+            category = locale.LC_MESSAGES
+        except AttributeError:
+            lang: Optional[str] = None
+        else:
+            lang, _ = locale.getlocale(category)
+        if lang is not None:
+            yield f"Error-{lang}"
+            for sep in ("-", "_"):
+                before, found, _ = lang.partition(sep)
+                if not found:
+                    continue
+                yield f"Error-{before}"
+        yield "Error"
+
+    @classmethod
+    def from_config(
+        cls,
+        config: Union[pathlib.Path, str],
+    ) -> "ExternallyManagedEnvironment":
+        parser = configparser.ConfigParser(interpolation=None)
+        try:
+            parser.read(config, encoding="utf-8")
+            section = parser["externally-managed"]
+            for key in cls._iter_externally_managed_error_keys():
+                with contextlib.suppress(KeyError):
+                    return cls(section[key])
+        except KeyError:
+            pass
+        except (OSError, UnicodeDecodeError, configparser.ParsingError):
+            from pip._internal.utils._log import VERBOSE
+
+            exc_info = logger.isEnabledFor(VERBOSE)
+            logger.warning("Failed to read %s", config, exc_info=exc_info)
+        return cls(None)
--- a/venv/Lib/site-packages/pip/_internal/index/collector.py
+++ b/venv/Lib/site-packages/pip/_internal/index/collector.py
@@ -2,30 +2,32 @@
 The main purpose of this module is to expose LinkCollector.collect_sources().
 """

-import cgi
 import collections
+import email.message
 import functools
-import html
 import itertools
+import json
 import logging
 import os
-import re
 import urllib.parse
 import urllib.request
-import xml.etree.ElementTree
+from html.parser import HTMLParser
 from optparse import Values
 from typing import (
+    TYPE_CHECKING,
    Callable,
+    Dict,
    Iterable,
    List,
    MutableMapping,
    NamedTuple,
    Optional,
    Sequence,
+    Tuple,
    Union,
 )

-from pip._vendor import html5lib, requests
+from pip._vendor import requests
 from pip._vendor.requests import Response
 from pip._vendor.requests.exceptions import RetryError, SSLError

@@ -35,14 +37,18 @@ from pip._internal.models.search_scope import SearchScope
 from pip._internal.network.session import PipSession
 from pip._internal.network.utils import raise_for_status
 from pip._internal.utils.filetypes import is_archive_file
-from pip._internal.utils.misc import pairwise, redact_auth_from_url
+from pip._internal.utils.misc import redact_auth_from_url
 from pip._internal.vcs import vcs

 from .sources import CandidatesFromPage, LinkSource, build_source

+if TYPE_CHECKING:
+    from typing import Protocol
+else:
+    Protocol = object
+
 logger = logging.getLogger(__name__)

-HTMLElement = xml.etree.ElementTree.Element
 ResponseHeaders = MutableMapping[str, str]


@@ -52,70 +58,90 @@ def _match_vcs_scheme(url: str) -> Optional[str]:
    Returns the matched VCS scheme, or None if there's no match.
    """
    for scheme in vcs.schemes:
-        if url.lower().startswith(scheme) and url[len(scheme)] in '+:':
+        if url.lower().startswith(scheme) and url[len(scheme)] in "+:":
            return scheme
    return None


-class _NotHTML(Exception):
+class _NotAPIContent(Exception):
    def __init__(self, content_type: str, request_desc: str) -> None:
        super().__init__(content_type, request_desc)
        self.content_type = content_type
        self.request_desc = request_desc


-def _ensure_html_header(response: Response) -> None:
-    """Check the Content-Type header to ensure the response contains HTML.
-
-    Raises `_NotHTML` if the content type is not text/html.
+def _ensure_api_header(response: Response) -> None:
    """
-    content_type = response.headers.get("Content-Type", "")
-    if not content_type.lower().startswith("text/html"):
-        raise _NotHTML(content_type, response.request.method)
+    Check the Content-Type header to ensure the response contains a Simple
+    API Response.
+
+    Raises `_NotAPIContent` if the content type is not a valid content-type.
+    """
+    content_type = response.headers.get("Content-Type", "Unknown")
+
+    content_type_l = content_type.lower()
+    if content_type_l.startswith(
+        (
+            "text/html",
+            "application/vnd.pypi.simple.v1+html",
+            "application/vnd.pypi.simple.v1+json",
+        )
+    ):
+        return
+
+    raise _NotAPIContent(content_type, response.request.method)


 class _NotHTTP(Exception):
    pass


-def _ensure_html_response(url: str, session: PipSession) -> None:
-    """Send a HEAD request to the URL, and ensure the response contains HTML.
+def _ensure_api_response(url: str, session: PipSession) -> None:
+    """
+    Send a HEAD request to the URL, and ensure the response contains a simple
+    API Response.

    Raises `_NotHTTP` if the URL is not available for a HEAD request, or
-    `_NotHTML` if the content type is not text/html.
+    `_NotAPIContent` if the content type is not a valid content type.
    """
    scheme, netloc, path, query, fragment = urllib.parse.urlsplit(url)
-    if scheme not in {'http', 'https'}:
+    if scheme not in {"http", "https"}:
        raise _NotHTTP()

    resp = session.head(url, allow_redirects=True)
    raise_for_status(resp)

-    _ensure_html_header(resp)
+    _ensure_api_header(resp)


-def _get_html_response(url: str, session: PipSession) -> Response:
-    """Access an HTML page with GET, and return the response.
+def _get_simple_response(url: str, session: PipSession) -> Response:
+    """Access an Simple API response with GET, and return the response.

    This consists of three parts:

    1. If the URL looks suspiciously like an archive, send a HEAD first to
-       check the Content-Type is HTML, to avoid downloading a large file.
-       Raise `_NotHTTP` if the content type cannot be determined, or
-       `_NotHTML` if it is not HTML.
+       check the Content-Type is HTML or Simple API, to avoid downloading a
+       large file. Raise `_NotHTTP` if the content type cannot be determined, or
+       `_NotAPIContent` if it is not HTML or a Simple API.
    2. Actually perform the request. Raise HTTP exceptions on network failures.
-    3. Check the Content-Type header to make sure we got HTML, and raise
-       `_NotHTML` otherwise.
+    3. Check the Content-Type header to make sure we got a Simple API response,
+       and raise `_NotAPIContent` otherwise.
    """
    if is_archive_file(Link(url).filename):
-        _ensure_html_response(url, session=session)
+        _ensure_api_response(url, session=session)

-    logger.debug('Getting page %s', redact_auth_from_url(url))
+    logger.debug("Getting page %s", redact_auth_from_url(url))

    resp = session.get(
        url,
        headers={
-            "Accept": "text/html",
+            "Accept": ", ".join(
+                [
+                    "application/vnd.pypi.simple.v1+json",
+                    "application/vnd.pypi.simple.v1+html; q=0.1",
+                    "text/html; q=0.01",
+                ]
+            ),
            # We don't want to blindly returned cached data for
            # /simple/, because authors generally expecting that
            # twine upload && pip install will function, but if
@@ -137,153 +163,52 @@ def _get_html_response(url: str, session: PipSession) -> Response:
    # The check for archives above only works if the url ends with
    # something that looks like an archive. However that is not a
    # requirement of an url. Unless we issue a HEAD request on every
-    # url we cannot know ahead of time for sure if something is HTML
-    # or not. However we can check after we've downloaded it.
-    _ensure_html_header(resp)
+    # url we cannot know ahead of time for sure if something is a
+    # Simple API response or not. However we can check after we've
+    # downloaded it.
+    _ensure_api_header(resp)
+
+    logger.debug(
+        "Fetched page %s as %s",
+        redact_auth_from_url(url),
+        resp.headers.get("Content-Type", "Unknown"),
+    )

    return resp


 def _get_encoding_from_headers(headers: ResponseHeaders) -> Optional[str]:
-    """Determine if we have any encoding information in our headers.
-    """
+    """Determine if we have any encoding information in our headers."""
    if headers and "Content-Type" in headers:
-        content_type, params = cgi.parse_header(headers["Content-Type"])
-        if "charset" in params:
-            return params['charset']
+        m = email.message.Message()
+        m["content-type"] = headers["Content-Type"]
+        charset = m.get_param("charset")
+        if charset:
+            return str(charset)
    return None


-def _determine_base_url(document: HTMLElement, page_url: str) -> str:
-    """Determine the HTML document's base URL.
-
-    This looks for a ``<base>`` tag in the HTML document. If present, its href
-    attribute denotes the base URL of anchor tags in the document. If there is
-    no such tag (or if it does not have a valid href attribute), the HTML
-    file's URL is used as the base URL.
-
-    :param document: An HTML document representation. The current
-        implementation expects the result of ``html5lib.parse()``.
-    :param page_url: The URL of the HTML document.
-    """
-    for base in document.findall(".//base"):
-        href = base.get("href")
-        if href is not None:
-            return href
-    return page_url
-
-
-def _clean_url_path_part(part: str) -> str:
-    """
-    Clean a "part" of a URL path (i.e. after splitting on "@" characters).
-    """
-    # We unquote prior to quoting to make sure nothing is double quoted.
-    return urllib.parse.quote(urllib.parse.unquote(part))
-
-
-def _clean_file_url_path(part: str) -> str:
-    """
-    Clean the first part of a URL path that corresponds to a local
-    filesystem path (i.e. the first part after splitting on "@" characters).
-    """
-    # We unquote prior to quoting to make sure nothing is double quoted.
-    # Also, on Windows the path part might contain a drive letter which
-    # should not be quoted. On Linux where drive letters do not
-    # exist, the colon should be quoted. We rely on urllib.request
-    # to do the right thing here.
-    return urllib.request.pathname2url(urllib.request.url2pathname(part))
-
-
-# percent-encoded:                   /
-_reserved_chars_re = re.compile('(@|%2F)', re.IGNORECASE)
-
-
-def _clean_url_path(path: str, is_local_path: bool) -> str:
-    """
-    Clean the path portion of a URL.
-    """
-    if is_local_path:
-        clean_func = _clean_file_url_path
-    else:
-        clean_func = _clean_url_path_part
-
-    # Split on the reserved characters prior to cleaning so that
-    # revision strings in VCS URLs are properly preserved.
-    parts = _reserved_chars_re.split(path)
-
-    cleaned_parts = []
-    for to_clean, reserved in pairwise(itertools.chain(parts, [''])):
-        cleaned_parts.append(clean_func(to_clean))
-        # Normalize %xx escapes (e.g. %2f -> %2F)
-        cleaned_parts.append(reserved.upper())
-
-    return ''.join(cleaned_parts)
-
-
-def _clean_link(url: str) -> str:
-    """
-    Make sure a link is fully quoted.
-    For example, if ' ' occurs in the URL, it will be replaced with "%20",
-    and without double-quoting other characters.
-    """
-    # Split the URL into parts according to the general structure
-    # `scheme://netloc/path;parameters?query#fragment`.
-    result = urllib.parse.urlparse(url)
-    # If the netloc is empty, then the URL refers to a local filesystem path.
-    is_local_path = not result.netloc
-    path = _clean_url_path(result.path, is_local_path=is_local_path)
-    return urllib.parse.urlunparse(result._replace(path=path))
-
-
-def _create_link_from_element(
-    anchor: HTMLElement,
-    page_url: str,
-    base_url: str,
-) -> Optional[Link]:
-    """
-    Convert an anchor element in a simple repository page to a Link.
-    """
-    href = anchor.get("href")
-    if not href:
-        return None
-
-    url = _clean_link(urllib.parse.urljoin(base_url, href))
-    pyrequire = anchor.get('data-requires-python')
-    pyrequire = html.unescape(pyrequire) if pyrequire else None
-
-    yanked_reason = anchor.get('data-yanked')
-    if yanked_reason:
-        yanked_reason = html.unescape(yanked_reason)
-
-    link = Link(
-        url,
-        comes_from=page_url,
-        requires_python=pyrequire,
-        yanked_reason=yanked_reason,
-    )
-
-    return link
-
-
 class CacheablePageContent:
-    def __init__(self, page: "HTMLPage") -> None:
+    def __init__(self, page: "IndexContent") -> None:
        assert page.cache_link_parsing
        self.page = page

    def __eq__(self, other: object) -> bool:
-        return (isinstance(other, type(self)) and
-                self.page.url == other.page.url)
+        return isinstance(other, type(self)) and self.page.url == other.page.url

    def __hash__(self) -> int:
        return hash(self.page.url)


-def with_cached_html_pages(
-    fn: Callable[["HTMLPage"], Iterable[Link]],
-) -> Callable[["HTMLPage"], List[Link]]:
+class ParseLinks(Protocol):
+    def __call__(self, page: "IndexContent") -> Iterable[Link]:
+        ...
+
+
+def with_cached_index_content(fn: ParseLinks) -> ParseLinks:
    """
-    Given a function that parses an Iterable[Link] from an HTMLPage, cache the
-    function's result (keyed by CacheablePageContent), unless the HTMLPage
+    Given a function that parses an Iterable[Link] from an IndexContent, cache the
+    function's result (keyed by CacheablePageContent), unless the IndexContent
    `page` has `page.cache_link_parsing == False`.
    """

@@ -292,7 +217,7 @@ def with_cached_html_pages(
        return list(fn(cacheable_page.page))

    @functools.wraps(fn)
-    def wrapper_wrapper(page: "HTMLPage") -> List[Link]:
+    def wrapper_wrapper(page: "IndexContent") -> List[Link]:
        if page.cache_link_parsing:
            return wrapper(CacheablePageContent(page))
        return list(fn(page))
@@ -300,36 +225,42 @@ def with_cached_html_pages(
    return wrapper_wrapper


-@with_cached_html_pages
-def parse_links(page: "HTMLPage") -> Iterable[Link]:
+@with_cached_index_content
+def parse_links(page: "IndexContent") -> Iterable[Link]:
    """
-    Parse an HTML document, and yield its anchor elements as Link objects.
+    Parse a Simple API's Index Content, and yield its anchor elements as Link objects.
    """
-    document = html5lib.parse(
-        page.content,
-        transport_encoding=page.encoding,
-        namespaceHTMLElements=False,
-    )
+
+    content_type_l = page.content_type.lower()
+    if content_type_l.startswith("application/vnd.pypi.simple.v1+json"):
+        data = json.loads(page.content)
+        for file in data.get("files", []):
+            link = Link.from_json(file, page.url)
+            if link is None:
+                continue
+            yield link
+        return
+
+    parser = HTMLLinkParser(page.url)
+    encoding = page.encoding or "utf-8"
+    parser.feed(page.content.decode(encoding))

    url = page.url
-    base_url = _determine_base_url(document, url)
-    for anchor in document.findall(".//a"):
-        link = _create_link_from_element(
-            anchor,
-            page_url=url,
-            base_url=base_url,
-        )
+    base_url = parser.base_url or url
+    for anchor in parser.anchors:
+        link = Link.from_element(anchor, page_url=url, base_url=base_url)
        if link is None:
            continue
        yield link


-class HTMLPage:
-    """Represents one page, along with its URL"""
+class IndexContent:
+    """Represents one response (or page), along with its URL"""

    def __init__(
        self,
        content: bytes,
+        content_type: str,
        encoding: Optional[str],
        url: str,
        cache_link_parsing: bool = True,
@@ -342,6 +273,7 @@ class HTMLPage:
                                   have this set to False, for example.
        """
        self.content = content
+        self.content_type = content_type
        self.encoding = encoding
        self.url = url
        self.cache_link_parsing = cache_link_parsing
@@ -350,80 +282,115 @@ class HTMLPage:
        return redact_auth_from_url(self.url)


-def _handle_get_page_fail(
+class HTMLLinkParser(HTMLParser):
+    """
+    HTMLParser that keeps the first base HREF and a list of all anchor
+    elements' attributes.
+    """
+
+    def __init__(self, url: str) -> None:
+        super().__init__(convert_charrefs=True)
+
+        self.url: str = url
+        self.base_url: Optional[str] = None
+        self.anchors: List[Dict[str, Optional[str]]] = []
+
+    def handle_starttag(self, tag: str, attrs: List[Tuple[str, Optional[str]]]) -> None:
+        if tag == "base" and self.base_url is None:
+            href = self.get_href(attrs)
+            if href is not None:
+                self.base_url = href
+        elif tag == "a":
+            self.anchors.append(dict(attrs))
+
+    def get_href(self, attrs: List[Tuple[str, Optional[str]]]) -> Optional[str]:
+        for name, value in attrs:
+            if name == "href":
+                return value
+        return None
+
+
+def _handle_get_simple_fail(
    link: Link,
    reason: Union[str, Exception],
-    meth: Optional[Callable[..., None]] = None
+    meth: Optional[Callable[..., None]] = None,
 ) -> None:
    if meth is None:
        meth = logger.debug
    meth("Could not fetch URL %s: %s - skipping", link, reason)


-def _make_html_page(response: Response, cache_link_parsing: bool = True) -> HTMLPage:
+def _make_index_content(
+    response: Response, cache_link_parsing: bool = True
+) -> IndexContent:
    encoding = _get_encoding_from_headers(response.headers)
-    return HTMLPage(
+    return IndexContent(
        response.content,
+        response.headers["Content-Type"],
        encoding=encoding,
        url=response.url,
-        cache_link_parsing=cache_link_parsing)
-
-
-def _get_html_page(
-    link: Link, session: Optional[PipSession] = None
-) -> Optional["HTMLPage"]:
-    if session is None:
-        raise TypeError(
-            "_get_html_page() missing 1 required keyword argument: 'session'"
+        cache_link_parsing=cache_link_parsing,
    )

-    url = link.url.split('#', 1)[0]
+
+def _get_index_content(link: Link, *, session: PipSession) -> Optional["IndexContent"]:
+    url = link.url.split("#", 1)[0]

    # Check for VCS schemes that do not support lookup as web pages.
    vcs_scheme = _match_vcs_scheme(url)
    if vcs_scheme:
-        logger.warning('Cannot look at %s URL %s because it does not support '
-                       'lookup as web pages.', vcs_scheme, link)
+        logger.warning(
+            "Cannot look at %s URL %s because it does not support lookup as web pages.",
+            vcs_scheme,
+            link,
+        )
        return None

    # Tack index.html onto file:// URLs that point to directories
    scheme, _, path, _, _, _ = urllib.parse.urlparse(url)
-    if (scheme == 'file' and os.path.isdir(urllib.request.url2pathname(path))):
+    if scheme == "file" and os.path.isdir(urllib.request.url2pathname(path)):
        # add trailing slash if not present so urljoin doesn't trim
        # final segment
-        if not url.endswith('/'):
-            url += '/'
-        url = urllib.parse.urljoin(url, 'index.html')
-        logger.debug(' file: URL is directory, getting %s', url)
+        if not url.endswith("/"):
+            url += "/"
+        # TODO: In the future, it would be nice if pip supported PEP 691
+        #       style responses in the file:// URLs, however there's no
+        #       standard file extension for application/vnd.pypi.simple.v1+json
+        #       so we'll need to come up with something on our own.
+        url = urllib.parse.urljoin(url, "index.html")
+        logger.debug(" file: URL is directory, getting %s", url)

    try:
-        resp = _get_html_response(url, session=session)
+        resp = _get_simple_response(url, session=session)
    except _NotHTTP:
        logger.warning(
-            'Skipping page %s because it looks like an archive, and cannot '
-            'be checked by a HTTP HEAD request.', link,
+            "Skipping page %s because it looks like an archive, and cannot "
+            "be checked by a HTTP HEAD request.",
+            link,
        )
-    except _NotHTML as exc:
+    except _NotAPIContent as exc:
        logger.warning(
-            'Skipping page %s because the %s request got Content-Type: %s.'
-            'The only supported Content-Type is text/html',
-            link, exc.request_desc, exc.content_type,
+            "Skipping page %s because the %s request got Content-Type: %s. "
+            "The only supported Content-Types are application/vnd.pypi.simple.v1+json, "
+            "application/vnd.pypi.simple.v1+html, and text/html",
+            link,
+            exc.request_desc,
+            exc.content_type,
        )
    except NetworkConnectionError as exc:
-        _handle_get_page_fail(link, exc)
+        _handle_get_simple_fail(link, exc)
    except RetryError as exc:
-        _handle_get_page_fail(link, exc)
+        _handle_get_simple_fail(link, exc)
    except SSLError as exc:
        reason = "There was a problem confirming the ssl certificate: "
        reason += str(exc)
-        _handle_get_page_fail(link, reason, meth=logger.info)
+        _handle_get_simple_fail(link, reason, meth=logger.info)
    except requests.ConnectionError as exc:
-        _handle_get_page_fail(link, f"connection error: {exc}")
+        _handle_get_simple_fail(link, f"connection error: {exc}")
    except requests.Timeout:
-        _handle_get_page_fail(link, "timed out")
+        _handle_get_simple_fail(link, "timed out")
    else:
-        return _make_html_page(resp,
-                               cache_link_parsing=link.cache_link_parsing)
+        return _make_index_content(resp, cache_link_parsing=link.cache_link_parsing)
    return None


@@ -451,9 +418,10 @@ class LinkCollector:

    @classmethod
    def create(
-        cls, session: PipSession,
+        cls,
+        session: PipSession,
        options: Values,
-        suppress_no_index: bool = False
+        suppress_no_index: bool = False,
    ) -> "LinkCollector":
        """
        :param session: The Session to use to make requests.
@@ -463,8 +431,8 @@ class LinkCollector:
        index_urls = [options.index_url] + options.extra_index_urls
        if options.no_index and not suppress_no_index:
            logger.debug(
-                'Ignoring indexes: %s',
-                ','.join(redact_auth_from_url(url) for url in index_urls),
+                "Ignoring indexes: %s",
+                ",".join(redact_auth_from_url(url) for url in index_urls),
            )
            index_urls = []

@@ -472,10 +440,13 @@ class LinkCollector:
        find_links = options.find_links or []

        search_scope = SearchScope.create(
-            find_links=find_links, index_urls=index_urls,
+            find_links=find_links,
+            index_urls=index_urls,
+            no_index=options.no_index,
        )
        link_collector = LinkCollector(
-            session=session, search_scope=search_scope,
+            session=session,
+            search_scope=search_scope,
        )
        return link_collector

@@ -483,11 +454,11 @@ class LinkCollector:
    def find_links(self) -> List[str]:
        return self.search_scope.find_links

-    def fetch_page(self, location: Link) -> Optional[HTMLPage]:
+    def fetch_response(self, location: Link) -> Optional[IndexContent]:
        """
        Fetch an HTML page containing package links.
        """
-        return _get_html_page(location, session=self.session)
+        return _get_index_content(location, session=self.session)

    def collect_sources(
        self,
--- a/venv/Lib/site-packages/pip/_internal/index/package_finder.py
+++ b/venv/Lib/site-packages/pip/_internal/index/package_finder.py
@@ -1,13 +1,11 @@
 """Routines related to PyPI, indexes"""

-# The following comment should be removed at some point in the future.
-# mypy: strict-optional=False
-
+import enum
 import functools
 import itertools
 import logging
 import re
-from typing import FrozenSet, Iterable, List, Optional, Set, Tuple, Union
+from typing import TYPE_CHECKING, FrozenSet, Iterable, List, Optional, Set, Tuple, Union

 from pip._vendor.packaging import specifiers
 from pip._vendor.packaging.tags import Tag
@@ -37,17 +35,17 @@ from pip._internal.utils.logging import indent_log
 from pip._internal.utils.misc import build_netloc
 from pip._internal.utils.packaging import check_requires_python
 from pip._internal.utils.unpacking import SUPPORTED_EXTENSIONS
-from pip._internal.utils.urls import url_to_path

-__all__ = ['FormatControl', 'BestCandidateResult', 'PackageFinder']
+if TYPE_CHECKING:
+    from pip._vendor.typing_extensions import TypeGuard
+
+__all__ = ["FormatControl", "BestCandidateResult", "PackageFinder"]


 logger = getLogger(__name__)

 BuildTag = Union[Tuple[()], Tuple[int, str]]
-CandidateSortingKey = (
-    Tuple[int, int, int, _BaseVersion, Optional[int], BuildTag]
-)
+CandidateSortingKey = Tuple[int, int, int, _BaseVersion, Optional[int], BuildTag]


 def _check_link_requires_python(
@@ -66,39 +64,54 @@ def _check_link_requires_python(
    """
    try:
        is_compatible = check_requires_python(
-            link.requires_python, version_info=version_info,
+            link.requires_python,
+            version_info=version_info,
        )
    except specifiers.InvalidSpecifier:
        logger.debug(
            "Ignoring invalid Requires-Python (%r) for link: %s",
-            link.requires_python, link,
+            link.requires_python,
+            link,
        )
    else:
        if not is_compatible:
-            version = '.'.join(map(str, version_info))
+            version = ".".join(map(str, version_info))
            if not ignore_requires_python:
                logger.verbose(
-                    'Link requires a different Python (%s not in: %r): %s',
-                    version, link.requires_python, link,
+                    "Link requires a different Python (%s not in: %r): %s",
+                    version,
+                    link.requires_python,
+                    link,
                )
                return False

            logger.debug(
-                'Ignoring failed Requires-Python check (%s not in: %r) '
-                'for link: %s',
-                version, link.requires_python, link,
+                "Ignoring failed Requires-Python check (%s not in: %r) for link: %s",
+                version,
+                link.requires_python,
+                link,
            )

    return True


+class LinkType(enum.Enum):
+    candidate = enum.auto()
+    different_project = enum.auto()
+    yanked = enum.auto()
+    format_unsupported = enum.auto()
+    format_invalid = enum.auto()
+    platform_mismatch = enum.auto()
+    requires_python_mismatch = enum.auto()
+
+
 class LinkEvaluator:

    """
    Responsible for evaluating links for a particular project.
    """

-    _py_version_re = re.compile(r'-py([123]\.?[0-9]?)$')
+    _py_version_re = re.compile(r"-py([123]\.?[0-9]?)$")

    # Don't include an allow_yanked default value to make sure each call
    # site considers whether yanked releases are allowed. This also causes
@@ -141,19 +154,20 @@ class LinkEvaluator:

        self.project_name = project_name

-    def evaluate_link(self, link: Link) -> Tuple[bool, Optional[str]]:
+    def evaluate_link(self, link: Link) -> Tuple[LinkType, str]:
        """
        Determine whether a link is a candidate for installation.

-        :return: A tuple (is_candidate, result), where `result` is (1) a
-            version string if `is_candidate` is True, and (2) if
-            `is_candidate` is False, an optional string to log the reason
-            the link fails to qualify.
+        :return: A tuple (result, detail), where *result* is an enum
+            representing whether the evaluation found a candidate, or the reason
+            why one is not found. If a candidate is found, *detail* will be the
+            candidate's version string; if one is not found, it contains the
+            reason the link fails to qualify.
        """
        version = None
        if link.is_yanked and not self._allow_yanked:
-            reason = link.yanked_reason or '<none given>'
-            return (False, f'yanked for reason: {reason}')
+            reason = link.yanked_reason or "<none given>"
+            return (LinkType.yanked, f"yanked for reason: {reason}")

        if link.egg_fragment:
            egg_info = link.egg_fragment
@@ -161,77 +175,83 @@ class LinkEvaluator:
        else:
            egg_info, ext = link.splitext()
            if not ext:
-                return (False, 'not a file')
+                return (LinkType.format_unsupported, "not a file")
            if ext not in SUPPORTED_EXTENSIONS:
-                return (False, f'unsupported archive format: {ext}')
+                return (
+                    LinkType.format_unsupported,
+                    f"unsupported archive format: {ext}",
+                )
            if "binary" not in self._formats and ext == WHEEL_EXTENSION:
-                reason = 'No binaries permitted for {}'.format(
-                    self.project_name)
-                return (False, reason)
-            if "macosx10" in link.path and ext == '.zip':
-                return (False, 'macosx10 one')
+                reason = f"No binaries permitted for {self.project_name}"
+                return (LinkType.format_unsupported, reason)
+            if "macosx10" in link.path and ext == ".zip":
+                return (LinkType.format_unsupported, "macosx10 one")
            if ext == WHEEL_EXTENSION:
                try:
                    wheel = Wheel(link.filename)
                except InvalidWheelFilename:
-                    return (False, 'invalid wheel filename')
+                    return (
+                        LinkType.format_invalid,
+                        "invalid wheel filename",
+                    )
                if canonicalize_name(wheel.name) != self._canonical_name:
-                    reason = 'wrong project name (not {})'.format(
-                        self.project_name)
-                    return (False, reason)
+                    reason = f"wrong project name (not {self.project_name})"
+                    return (LinkType.different_project, reason)

                supported_tags = self._target_python.get_tags()
                if not wheel.supported(supported_tags):
                    # Include the wheel's tags in the reason string to
                    # simplify troubleshooting compatibility issues.
-                    file_tags = wheel.get_formatted_file_tags()
+                    file_tags = ", ".join(wheel.get_formatted_file_tags())
                    reason = (
-                        "none of the wheel's tags ({}) are compatible "
-                        "(run pip debug --verbose to show compatible tags)".format(
-                            ', '.join(file_tags)
+                        f"none of the wheel's tags ({file_tags}) are compatible "
+                        f"(run pip debug --verbose to show compatible tags)"
                    )
-                    )
-                    return (False, reason)
+                    return (LinkType.platform_mismatch, reason)

                version = wheel.version

        # This should be up by the self.ok_binary check, but see issue 2700.
        if "source" not in self._formats and ext != WHEEL_EXTENSION:
-            reason = f'No sources permitted for {self.project_name}'
-            return (False, reason)
+            reason = f"No sources permitted for {self.project_name}"
+            return (LinkType.format_unsupported, reason)

        if not version:
            version = _extract_version_from_fragment(
-                egg_info, self._canonical_name,
+                egg_info,
+                self._canonical_name,
            )
        if not version:
-            reason = f'Missing project version for {self.project_name}'
-            return (False, reason)
+            reason = f"Missing project version for {self.project_name}"
+            return (LinkType.format_invalid, reason)

        match = self._py_version_re.search(version)
        if match:
            version = version[: match.start()]
            py_version = match.group(1)
            if py_version != self._target_python.py_version:
-                return (False, 'Python version is incorrect')
+                return (
+                    LinkType.platform_mismatch,
+                    "Python version is incorrect",
+                )

        supports_python = _check_link_requires_python(
-            link, version_info=self._target_python.py_version_info,
+            link,
+            version_info=self._target_python.py_version_info,
            ignore_requires_python=self._ignore_requires_python,
        )
        if not supports_python:
-            # Return None for the reason text to suppress calling
-            # _log_skipped_link().
-            return (False, None)
+            reason = f"{version} Requires-Python {link.requires_python}"
+            return (LinkType.requires_python_mismatch, reason)

-        logger.debug('Found link %s, version: %s', link, version)
+        logger.debug("Found link %s, version: %s", link, version)

-        return (True, version)
+        return (LinkType.candidate, version)


 def filter_unallowed_hashes(
    candidates: List[InstallationCandidate],
-    hashes: Hashes,
+    hashes: Optional[Hashes],
    project_name: str,
 ) -> List[InstallationCandidate]:
    """
@@ -251,8 +271,8 @@ def filter_unallowed_hashes(
    """
    if not hashes:
        logger.debug(
-            'Given no hashes to check %s links for project %r: '
-            'discarding no candidates',
+            "Given no hashes to check %s links for project %r: "
+            "discarding no candidates",
            len(candidates),
            project_name,
        )
@@ -282,22 +302,22 @@ def filter_unallowed_hashes(
        filtered = list(candidates)

    if len(filtered) == len(candidates):
-        discard_message = 'discarding no candidates'
+        discard_message = "discarding no candidates"
    else:
-        discard_message = 'discarding {} non-matches:\n  {}'.format(
+        discard_message = "discarding {} non-matches:\n  {}".format(
            len(non_matches),
-            '\n  '.join(str(candidate.link) for candidate in non_matches)
+            "\n  ".join(str(candidate.link) for candidate in non_matches),
        )

    logger.debug(
-        'Checked %s links for project %r against %s hashes '
-        '(%s matches, %s no digest): %s',
+        "Checked %s links for project %r against %s hashes "
+        "(%s matches, %s no digest): %s",
        len(candidates),
        project_name,
        hashes.digest_count,
        match_count,
        len(matches_or_no_digest) - match_count,
-        discard_message
+        discard_message,
    )

    return filtered
@@ -354,13 +374,11 @@ class BestCandidateResult:
        self.best_candidate = best_candidate

    def iter_all(self) -> Iterable[InstallationCandidate]:
-        """Iterate through all candidates.
-        """
+        """Iterate through all candidates."""
        return iter(self._candidates)

    def iter_applicable(self) -> Iterable[InstallationCandidate]:
-        """Iterate through the applicable candidates.
-        """
+        """Iterate through the applicable candidates."""
        return iter(self._applicable_candidates)


@@ -444,7 +462,8 @@ class CandidateEvaluator:
        allow_prereleases = self._allow_all_prereleases or None
        specifier = self._specifier
        versions = {
-            str(v) for v in specifier.filter(
+            str(v)
+            for v in specifier.filter(
                # We turn the version object into a str here because otherwise
                # when we're debundled but setuptools isn't, Python will see
                # packaging.version.Version and
@@ -458,9 +477,7 @@ class CandidateEvaluator:
        }

        # Again, converting version to str to deal with debundling.
-        applicable_candidates = [
-            c for c in candidates if str(c.version) in versions
-        ]
+        applicable_candidates = [c for c in candidates if str(c.version) in versions]

        filtered_applicable_candidates = filter_unallowed_hashes(
            candidates=applicable_candidates,
@@ -509,9 +526,11 @@ class CandidateEvaluator:
            # can raise InvalidWheelFilename
            wheel = Wheel(link.filename)
            try:
-                pri = -(wheel.find_most_preferred_tag(
+                pri = -(
+                    wheel.find_most_preferred_tag(
                        valid_tags, self._wheel_tag_preferences
-                ))
+                    )
+                )
            except ValueError:
                raise UnsupportedWheel(
                    "{} is not a supported wheel for this platform. It "
@@ -520,7 +539,8 @@ class CandidateEvaluator:
            if self._prefer_binary:
                binary_preference = 1
            if wheel.build_tag is not None:
-                match = re.match(r'^(\d+)(.*)$', wheel.build_tag)
+                match = re.match(r"^(\d+)(.*)$", wheel.build_tag)
+                assert match is not None, "guaranteed by filename validation"
                build_tag_groups = match.groups()
                build_tag = (int(build_tag_groups[0]), build_tag_groups[1])
        else:  # sdist
@@ -528,8 +548,12 @@ class CandidateEvaluator:
        has_allowed_hash = int(link.is_hash_allowed(self._hashes))
        yank_value = -1 * int(link.is_yanked)  # -1 for yanked.
        return (
-            has_allowed_hash, yank_value, binary_preference, candidate.version,
-            pri, build_tag,
+            has_allowed_hash,
+            yank_value,
+            binary_preference,
+            candidate.version,
+            pri,
+            build_tag,
        )

    def sort_best_candidate(
@@ -603,7 +627,7 @@ class PackageFinder:
        self.format_control = format_control

        # These are boring links that have already been logged somehow.
-        self._logged_links: Set[Link] = set()
+        self._logged_links: Set[Tuple[Link, LinkType, str]] = set()

    # Don't include an allow_yanked default value to make sure each call
    # site considers whether yanked releases are allowed. This also causes
@@ -680,6 +704,14 @@ class PackageFinder:
    def set_prefer_binary(self) -> None:
        self._candidate_prefs.prefer_binary = True

+    def requires_python_skipped_reasons(self) -> List[str]:
+        reasons = {
+            detail
+            for _, result, detail in self._logged_links
+            if result == LinkType.requires_python_mismatch
+        }
+        return sorted(reasons)
+
    def make_link_evaluator(self, project_name: str) -> LinkEvaluator:
        canonical_name = canonicalize_name(project_name)
        formats = self.format_control.get_allowed_formats(canonical_name)
@@ -709,12 +741,13 @@ class PackageFinder:
                    no_eggs.append(link)
        return no_eggs + eggs

-    def _log_skipped_link(self, link: Link, reason: str) -> None:
-        if link not in self._logged_links:
+    def _log_skipped_link(self, link: Link, result: LinkType, detail: str) -> None:
+        entry = (link, result, detail)
+        if entry not in self._logged_links:
            # Put the link at the end so the reason is more visible and because
            # the link string is usually very long.
-            logger.debug('Skipping link: %s: %s', reason, link)
-            self._logged_links.add(link)
+            logger.debug("Skipping link: %s: %s", detail, link)
+            self._logged_links.add(entry)

    def get_install_candidate(
        self, link_evaluator: LinkEvaluator, link: Link
@@ -723,16 +756,15 @@ class PackageFinder:
        If the link is a candidate for install, convert it to an
        InstallationCandidate and return it. Otherwise, return None.
        """
-        is_candidate, result = link_evaluator.evaluate_link(link)
-        if not is_candidate:
-            if result:
-                self._log_skipped_link(link, reason=result)
+        result, detail = link_evaluator.evaluate_link(link)
+        if result != LinkType.candidate:
+            self._log_skipped_link(link, result, detail)
            return None

        return InstallationCandidate(
            name=link_evaluator.project_name,
            link=link,
-            version=result,
+            version=detail,
        )

    def evaluate_links(
@@ -753,13 +785,14 @@ class PackageFinder:
        self, project_url: Link, link_evaluator: LinkEvaluator
    ) -> List[InstallationCandidate]:
        logger.debug(
-            'Fetching project page and analyzing links: %s', project_url,
+            "Fetching project page and analyzing links: %s",
+            project_url,
        )
-        html_page = self._link_collector.fetch_page(project_url)
-        if html_page is None:
+        index_response = self._link_collector.fetch_response(project_url)
+        if index_response is None:
            return []

-        page_links = list(parse_links(html_page))
+        page_links = list(parse_links(index_response))

        with indent_log():
            package_links = self.evaluate_links(
@@ -809,7 +842,14 @@ class PackageFinder:
        )

        if logger.isEnabledFor(logging.DEBUG) and file_candidates:
-            paths = [url_to_path(c.link.url) for c in file_candidates]
+            paths = []
+            for candidate in file_candidates:
+                assert candidate.link.url  # we need to have a URL
+                try:
+                    paths.append(candidate.link.file_path)
+                except Exception:
+                    paths.append(candidate.link.url)  # it's not a local file
+
            logger.debug("Local files found: %s", ", ".join(paths))

        # This is an intentional priority ordering
@@ -821,8 +861,7 @@ class PackageFinder:
        specifier: Optional[specifiers.BaseSpecifier] = None,
        hashes: Optional[Hashes] = None,
    ) -> CandidateEvaluator:
-        """Create a CandidateEvaluator object to use.
-        """
+        """Create a CandidateEvaluator object to use."""
        candidate_prefs = self._candidate_prefs
        return CandidateEvaluator.create(
            project_name=project_name,
@@ -867,76 +906,84 @@ class PackageFinder:
        """
        hashes = req.hashes(trust_internet=False)
        best_candidate_result = self.find_best_candidate(
-            req.name, specifier=req.specifier, hashes=hashes,
+            req.name,
+            specifier=req.specifier,
+            hashes=hashes,
        )
        best_candidate = best_candidate_result.best_candidate

        installed_version: Optional[_BaseVersion] = None
        if req.satisfied_by is not None:
-            installed_version = parse_version(req.satisfied_by.version)
+            installed_version = req.satisfied_by.version

        def _format_versions(cand_iter: Iterable[InstallationCandidate]) -> str:
            # This repeated parse_version and str() conversion is needed to
            # handle different vendoring sources from pip and pkg_resources.
            # If we stop using the pkg_resources provided specifier and start
            # using our own, we can drop the cast to str().
-            return ", ".join(sorted(
+            return (
+                ", ".join(
+                    sorted(
                        {str(c.version) for c in cand_iter},
                        key=parse_version,
-            )) or "none"
+                    )
+                )
+                or "none"
+            )

        if installed_version is None and best_candidate is None:
            logger.critical(
-                'Could not find a version that satisfies the requirement %s '
-                '(from versions: %s)',
+                "Could not find a version that satisfies the requirement %s "
+                "(from versions: %s)",
                req,
                _format_versions(best_candidate_result.iter_all()),
            )

            raise DistributionNotFound(
-                'No matching distribution found for {}'.format(
-                    req)
+                "No matching distribution found for {}".format(req)
            )

-        best_installed = False
-        if installed_version and (
-                best_candidate is None or
-                best_candidate.version <= installed_version):
-            best_installed = True
+        def _should_install_candidate(
+            candidate: Optional[InstallationCandidate],
+        ) -> "TypeGuard[InstallationCandidate]":
+            if installed_version is None:
+                return True
+            if best_candidate is None:
+                return False
+            return best_candidate.version > installed_version

        if not upgrade and installed_version is not None:
-            if best_installed:
+            if _should_install_candidate(best_candidate):
                logger.debug(
-                    'Existing installed version (%s) is most up-to-date and '
-                    'satisfies requirement',
-                    installed_version,
-                )
-            else:
-                logger.debug(
-                    'Existing installed version (%s) satisfies requirement '
-                    '(most up-to-date version is %s)',
+                    "Existing installed version (%s) satisfies requirement "
+                    "(most up-to-date version is %s)",
                    installed_version,
                    best_candidate.version,
                )
+            else:
+                logger.debug(
+                    "Existing installed version (%s) is most up-to-date and "
+                    "satisfies requirement",
+                    installed_version,
+                )
            return None

-        if best_installed:
-            # We have an existing version, and its the best version
+        if _should_install_candidate(best_candidate):
            logger.debug(
-                'Installed version (%s) is most up-to-date (past versions: '
-                '%s)',
-                installed_version,
-                _format_versions(best_candidate_result.iter_applicable()),
-            )
-            raise BestVersionAlreadyInstalled
-
-        logger.debug(
-            'Using version %s (newest of versions: %s)',
+                "Using version %s (newest of versions: %s)",
                best_candidate.version,
                _format_versions(best_candidate_result.iter_applicable()),
            )
            return best_candidate

+        # We have an existing version, and its the best version
+        logger.debug(
+            "Installed version (%s) is most up-to-date (past versions: %s)",
+            installed_version,
+            _format_versions(best_candidate_result.iter_applicable()),
+        )
+        raise BestVersionAlreadyInstalled
+

 def _find_name_version_sep(fragment: str, canonical_name: str) -> int:
    """Find the separator's index based on the package's canonical name.
--- a/venv/Lib/site-packages/pip/_internal/index/sources.py
+++ b/venv/Lib/site-packages/pip/_internal/index/sources.py
@@ -171,7 +171,6 @@ def build_source(
    expand_dir: bool,
    cache_link_parsing: bool,
 ) -> Tuple[Optional[str], Optional[LinkSource]]:
-
    path: Optional[str] = None
    url: Optional[str] = None
    if os.path.exists(location):  # Is a local path.
--- a/venv/Lib/site-packages/pip/_internal/locations/init.py
+++ b/venv/Lib/site-packages/pip/_internal/locations/init.py
@@ -4,14 +4,14 @@ import os
 import pathlib
 import sys
 import sysconfig
-from typing import Any, Dict, Iterator, List, Optional, Tuple
+from typing import Any, Dict, Generator, Optional, Tuple

 from pip._internal.models.scheme import SCHEME_KEYS, Scheme
 from pip._internal.utils.compat import WINDOWS
 from pip._internal.utils.deprecation import deprecated
 from pip._internal.utils.virtualenv import running_under_virtualenv

-from . import _distutils, _sysconfig
+from . import _sysconfig
 from .base import (
    USER_CACHE_DIR,
    get_major_minor_version,
@@ -27,7 +27,6 @@ __all__ = [
    "get_bin_user",
    "get_major_minor_version",
    "get_platlib",
-    "get_prefixed_libs",
    "get_purelib",
    "get_scheme",
    "get_src_prefix",
@@ -38,20 +37,48 @@ __all__ = [

 logger = logging.getLogger(__name__)

-if os.environ.get("_PIP_LOCATIONS_NO_WARN_ON_MISMATCH"):
-    _MISMATCH_LEVEL = logging.DEBUG
-else:
-    _MISMATCH_LEVEL = logging.WARNING

 _PLATLIBDIR: str = getattr(sys, "platlibdir", "lib")

+_USE_SYSCONFIG_DEFAULT = sys.version_info >= (3, 10)
+
+
+def _should_use_sysconfig() -> bool:
+    """This function determines the value of _USE_SYSCONFIG.
+
+    By default, pip uses sysconfig on Python 3.10+.
+    But Python distributors can override this decision by setting:
+        sysconfig._PIP_USE_SYSCONFIG = True / False
+    Rationale in https://github.com/pypa/pip/issues/10647
+
+    This is a function for testability, but should be constant during any one
+    run.
+    """
+    return bool(getattr(sysconfig, "_PIP_USE_SYSCONFIG", _USE_SYSCONFIG_DEFAULT))
+
+
+_USE_SYSCONFIG = _should_use_sysconfig()
+
+if not _USE_SYSCONFIG:
+    # Import distutils lazily to avoid deprecation warnings,
+    # but import it soon enough that it is in memory and available during
+    # a pip reinstall.
+    from . import _distutils
+
+# Be noisy about incompatibilities if this platforms "should" be using
+# sysconfig, but is explicitly opting out and using distutils instead.
+if _USE_SYSCONFIG_DEFAULT and not _USE_SYSCONFIG:
+    _MISMATCH_LEVEL = logging.WARNING
+else:
+    _MISMATCH_LEVEL = logging.DEBUG
+

 def _looks_like_bpo_44860() -> bool:
    """The resolution to bpo-44860 will change this incorrect platlib.

    See <https://bugs.python.org/issue44860>.
    """
-    from distutils.command.install import INSTALL_SCHEMES  # type: ignore
+    from distutils.command.install import INSTALL_SCHEMES

    try:
        unix_user_platlib = INSTALL_SCHEMES["unix_user"]["platlib"]
@@ -62,6 +89,8 @@ def _looks_like_bpo_44860() -> bool:

 def _looks_like_red_hat_patched_platlib_purelib(scheme: Dict[str, str]) -> bool:
    platlib = scheme["platlib"]
+    if "/$platlibdir/" in platlib:
+        platlib = platlib.replace("/$platlibdir/", f"/{_PLATLIBDIR}/")
    if "/lib64/" not in platlib:
        return False
    unpatched = platlib.replace("/lib64/", "/lib/")
@@ -74,7 +103,7 @@ def _looks_like_red_hat_lib() -> bool:

    This is the only way I can see to tell a Red Hat-patched Python.
    """
-    from distutils.command.install import INSTALL_SCHEMES  # type: ignore
+    from distutils.command.install import INSTALL_SCHEMES

    return all(
        k in INSTALL_SCHEMES
@@ -86,7 +115,7 @@ def _looks_like_red_hat_lib() -> bool:
@functools.lru_cache(maxsize=None)
 def _looks_like_debian_scheme() -> bool:
    """Debian adds two additional schemes."""
-    from distutils.command.install import INSTALL_SCHEMES  # type: ignore
+    from distutils.command.install import INSTALL_SCHEMES

    return "deb_system" in INSTALL_SCHEMES and "unix_local" in INSTALL_SCHEMES

@@ -111,6 +140,22 @@ def _looks_like_red_hat_scheme() -> bool:
    )


+@functools.lru_cache(maxsize=None)
+def _looks_like_slackware_scheme() -> bool:
+    """Slackware patches sysconfig but fails to patch distutils and site.
+
+    Slackware changes sysconfig's user scheme to use ``"lib64"`` for the lib
+    path, but does not do the same to the site module.
+    """
+    if user_site is None:  # User-site not available.
+        return False
+    try:
+        paths = sysconfig.get_paths(scheme="posix_user", expand=False)
+    except KeyError:  # User-site not available.
+        return False
+    return "/lib64/" in paths["purelib"] and "/lib64/" not in user_site
+
+
@functools.lru_cache(maxsize=None)
 def _looks_like_msys2_mingw_scheme() -> bool:
    """MSYS2 patches distutils and sysconfig to use a UNIX-like scheme.
@@ -129,9 +174,9 @@ def _looks_like_msys2_mingw_scheme() -> bool:
    )


-def _fix_abiflags(parts: Tuple[str]) -> Iterator[str]:
+def _fix_abiflags(parts: Tuple[str]) -> Generator[str, None, None]:
    ldversion = sysconfig.get_config_var("LDVERSION")
-    abiflags: str = getattr(sys, "abiflags", None)
+    abiflags = getattr(sys, "abiflags", None)

    # LDVERSION does not end with sys.abiflags. Just return the path unchanged.
    if not ldversion or not abiflags or not ldversion.endswith(abiflags):
@@ -190,7 +235,7 @@ def get_scheme(
    isolated: bool = False,
    prefix: Optional[str] = None,
 ) -> Scheme:
-    old = _distutils.get_scheme(
+    new = _sysconfig.get_scheme(
        dist_name,
        user=user,
        home=home,
@@ -198,7 +243,10 @@ def get_scheme(
        isolated=isolated,
        prefix=prefix,
    )
-    new = _sysconfig.get_scheme(
+    if _USE_SYSCONFIG:
+        return new
+
+    old = _distutils.get_scheme(
        dist_name,
        user=user,
        home=home,
@@ -263,6 +311,17 @@ def get_scheme(
        if skip_bpo_44860:
            continue

+        # Slackware incorrectly patches posix_user to use lib64 instead of lib,
+        # but not usersite to match the location.
+        skip_slackware_user_scheme = (
+            user
+            and k in ("platlib", "purelib")
+            and not WINDOWS
+            and _looks_like_slackware_scheme()
+        )
+        if skip_slackware_user_scheme:
+            continue
+
        # Both Debian and Red Hat patch Python to place the system site under
        # /usr/local instead of /usr. Debian also places lib in dist-packages
        # instead of site-packages, but the /usr/local check should cover it.
@@ -296,6 +355,18 @@ def get_scheme(
        if skip_msys2_mingw_bug:
            continue

+        # CPython's POSIX install script invokes pip (via ensurepip) against the
+        # interpreter located in the source tree, not the install site. This
+        # triggers special logic in sysconfig that's not present in distutils.
+        # https://github.com/python/cpython/blob/8c21941ddaf/Lib/sysconfig.py#L178-L194
+        skip_cpython_build = (
+            sysconfig.is_python_build(check_home=True)
+            and not WINDOWS
+            and k in ("headers", "include", "platinclude")
+        )
+        if skip_cpython_build:
+            continue
+
        warning_contexts.append((old_v, new_v, f"scheme.{k}"))

    if not warning_contexts:
@@ -315,10 +386,12 @@ def get_scheme(
    )
    if any(default_old[k] != getattr(old, k) for k in SCHEME_KEYS):
        deprecated(
+            reason=(
                "Configuring installation scheme with distutils config files "
                "is deprecated and will no longer work in the near future. If you "
                "are using a Homebrew or Linuxbrew Python, please see discussion "
-            "at https://github.com/Homebrew/homebrew-core/issues/76621",
+                "at https://github.com/Homebrew/homebrew-core/issues/76621"
+            ),
            replacement=None,
            gone_in=None,
        )
@@ -333,8 +406,11 @@ def get_scheme(


 def get_bin_prefix() -> str:
-    old = _distutils.get_bin_prefix()
    new = _sysconfig.get_bin_prefix()
+    if _USE_SYSCONFIG:
+        return new
+
+    old = _distutils.get_bin_prefix()
    if _warn_if_mismatch(pathlib.Path(old), pathlib.Path(new), key="bin_prefix"):
        _log_context()
    return old
@@ -363,8 +439,11 @@ def _looks_like_deb_system_dist_packages(value: str) -> bool:

 def get_purelib() -> str:
    """Return the default pure-Python lib location."""
-    old = _distutils.get_purelib()
    new = _sysconfig.get_purelib()
+    if _USE_SYSCONFIG:
+        return new
+
+    old = _distutils.get_purelib()
    if _looks_like_deb_system_dist_packages(old):
        return old
    if _warn_if_mismatch(pathlib.Path(old), pathlib.Path(new), key="purelib"):
@@ -374,35 +453,15 @@ def get_purelib() -> str:

 def get_platlib() -> str:
    """Return the default platform-shared lib location."""
-    old = _distutils.get_platlib()
    new = _sysconfig.get_platlib()
+    if _USE_SYSCONFIG:
+        return new
+
+    from . import _distutils
+
+    old = _distutils.get_platlib()
    if _looks_like_deb_system_dist_packages(old):
        return old
    if _warn_if_mismatch(pathlib.Path(old), pathlib.Path(new), key="platlib"):
        _log_context()
    return old
-
-
-def get_prefixed_libs(prefix: str) -> List[str]:
-    """Return the lib locations under ``prefix``."""
-    old_pure, old_plat = _distutils.get_prefixed_libs(prefix)
-    new_pure, new_plat = _sysconfig.get_prefixed_libs(prefix)
-
-    warned = [
-        _warn_if_mismatch(
-            pathlib.Path(old_pure),
-            pathlib.Path(new_pure),
-            key="prefixed-purelib",
-        ),
-        _warn_if_mismatch(
-            pathlib.Path(old_plat),
-            pathlib.Path(new_plat),
-            key="prefixed-platlib",
-        ),
-    ]
-    if any(warned):
-        _log_context(prefix=prefix)
-
-    if old_pure == old_plat:
-        return [old_pure]
-    return [old_pure, old_plat]
--- a/venv/Lib/site-packages/pip/_internal/locations/_distutils.py
+++ b/venv/Lib/site-packages/pip/_internal/locations/_distutils.py
@@ -3,6 +3,17 @@
 # The following comment should be removed at some point in the future.
 # mypy: strict-optional=False

+# If pip's going to use distutils, it should not be using the copy that setuptools
+# might have injected into the environment. This is done by removing the injected
+# shim, if it's injected.
+#
+# See https://github.com/pypa/pip/issues/8761 for the original discussion and
+# rationale for why this is done within pip.
+try:
+    __import__("_distutils_hack").remove_shim()
+except (ImportError, AttributeError):
+    pass
+
 import logging
 import os
 import sys
@@ -10,7 +21,7 @@ from distutils.cmd import Command as DistutilsCommand
 from distutils.command.install import SCHEME_KEYS
 from distutils.command.install import install as distutils_install_command
 from distutils.sysconfig import get_python_lib
-from typing import Dict, List, Optional, Tuple, Union, cast
+from typing import Dict, List, Optional, Union, cast

 from pip._internal.models.scheme import Scheme
 from pip._internal.utils.compat import WINDOWS
@@ -24,10 +35,10 @@ logger = logging.getLogger(__name__)
 def distutils_scheme(
    dist_name: str,
    user: bool = False,
-    home: str = None,
-    root: str = None,
+    home: Optional[str] = None,
+    root: Optional[str] = None,
    isolated: bool = False,
-    prefix: str = None,
+    prefix: Optional[str] = None,
    *,
    ignore_config_files: bool = False,
 ) -> Dict[str, str]:
@@ -84,7 +95,7 @@ def distutils_scheme(
        if home:
            prefix = home
        elif user:
-            prefix = i.install_userbase  # type: ignore
+            prefix = i.install_userbase
        else:
            prefix = i.prefix
        scheme["headers"] = os.path.join(
@@ -160,10 +171,3 @@ def get_purelib() -> str:

 def get_platlib() -> str:
    return get_python_lib(plat_specific=True)
-
-
-def get_prefixed_libs(prefix: str) -> Tuple[str, str]:
-    return (
-        get_python_lib(plat_specific=False, prefix=prefix),
-        get_python_lib(plat_specific=True, prefix=prefix),
-    )
--- a/venv/Lib/site-packages/pip/_internal/locations/_sysconfig.py
+++ b/venv/Lib/site-packages/pip/_internal/locations/_sysconfig.py
@@ -1,4 +1,3 @@
-import distutils.util  # FIXME: For change_root.
 import logging
 import os
 import sys
@@ -9,7 +8,7 @@ from pip._internal.exceptions import InvalidSchemeCombination, UserInstallationI
 from pip._internal.models.scheme import SCHEME_KEYS, Scheme
 from pip._internal.utils.virtualenv import running_under_virtualenv

-from .base import get_major_minor_version, is_osx_framework
+from .base import change_root, get_major_minor_version, is_osx_framework

 logger = logging.getLogger(__name__)

@@ -194,7 +193,7 @@ def get_scheme(
    )
    if root is not None:
        for key in SCHEME_KEYS:
-            value = distutils.util.change_root(root, getattr(scheme, key))
+            value = change_root(root, getattr(scheme, key))
            setattr(scheme, key, value)
    return scheme

@@ -212,8 +211,3 @@ def get_purelib() -> str:

 def get_platlib() -> str:
    return sysconfig.get_paths()["platlib"]
-
-
-def get_prefixed_libs(prefix: str) -> typing.Tuple[str, str]:
-    paths = sysconfig.get_paths(vars={"base": prefix, "platbase": prefix})
-    return (paths["purelib"], paths["platlib"])
--- a/venv/Lib/site-packages/pip/_internal/locations/base.py
+++ b/venv/Lib/site-packages/pip/_internal/locations/base.py
@@ -5,6 +5,7 @@ import sys
 import sysconfig
 import typing

+from pip._internal.exceptions import InstallationError
 from pip._internal.utils import appdirs
 from pip._internal.utils.virtualenv import running_under_virtualenv

@@ -12,7 +13,7 @@ from pip._internal.utils.virtualenv import running_under_virtualenv
 USER_CACHE_DIR = appdirs.user_cache_dir("pip")

 # FIXME doesn't account for venv linked to global site-packages
-site_packages: typing.Optional[str] = sysconfig.get_path("purelib")
+site_packages: str = sysconfig.get_path("purelib")


 def get_major_minor_version() -> str:
@@ -23,6 +24,34 @@ def get_major_minor_version() -> str:
    return "{}.{}".format(*sys.version_info)


+def change_root(new_root: str, pathname: str) -> str:
+    """Return 'pathname' with 'new_root' prepended.
+
+    If 'pathname' is relative, this is equivalent to os.path.join(new_root, pathname).
+    Otherwise, it requires making 'pathname' relative and then joining the
+    two, which is tricky on DOS/Windows and Mac OS.
+
+    This is borrowed from Python's standard library's distutils module.
+    """
+    if os.name == "posix":
+        if not os.path.isabs(pathname):
+            return os.path.join(new_root, pathname)
+        else:
+            return os.path.join(new_root, pathname[1:])
+
+    elif os.name == "nt":
+        (drive, path) = os.path.splitdrive(pathname)
+        if path[0] == "\\":
+            path = path[1:]
+        return os.path.join(new_root, path)
+
+    else:
+        raise InstallationError(
+            f"Unknown platform: {os.name}\n"
+            "Can not change root path prefix on unknown platform."
+        )
+
+
 def get_src_prefix() -> str:
    if running_under_virtualenv():
        src_prefix = os.path.join(sys.prefix, "src")
--- a/venv/Lib/site-packages/pip/_internal/main.py
+++ b/venv/Lib/site-packages/pip/_internal/main.py
@@ -1,8 +1,7 @@
 from typing import List, Optional


-def main(args=None):
-    # type: (Optional[List[str]]) -> int
+def main(args: Optional[List[str]] = None) -> int:
    """This is preserved for old console scripts that may still be referencing
    it.

--- a/venv/Lib/site-packages/pip/_internal/metadata/init.py
+++ b/venv/Lib/site-packages/pip/_internal/metadata/init.py
@@ -1,16 +1,70 @@
-from typing import List, Optional
+import contextlib
+import functools
+import os
+import sys
+from typing import TYPE_CHECKING, List, Optional, Type, cast

-from .base import BaseDistribution, BaseEnvironment
+from pip._internal.utils.misc import strtobool
+
+from .base import BaseDistribution, BaseEnvironment, FilesystemWheel, MemoryWheel, Wheel
+
+if TYPE_CHECKING:
+    from typing import Protocol
+else:
+    Protocol = object

 __all__ = [
    "BaseDistribution",
    "BaseEnvironment",
+    "FilesystemWheel",
+    "MemoryWheel",
+    "Wheel",
    "get_default_environment",
    "get_environment",
    "get_wheel_distribution",
+    "select_backend",
 ]


+def _should_use_importlib_metadata() -> bool:
+    """Whether to use the ``importlib.metadata`` or ``pkg_resources`` backend.
+
+    By default, pip uses ``importlib.metadata`` on Python 3.11+, and
+    ``pkg_resourcess`` otherwise. This can be overridden by a couple of ways:
+
+    * If environment variable ``_PIP_USE_IMPORTLIB_METADATA`` is set, it
+      dictates whether ``importlib.metadata`` is used, regardless of Python
+      version.
+    * On Python 3.11+, Python distributors can patch ``importlib.metadata``
+      to add a global constant ``_PIP_USE_IMPORTLIB_METADATA = False``. This
+      makes pip use ``pkg_resources`` (unless the user set the aforementioned
+      environment variable to *True*).
+    """
+    with contextlib.suppress(KeyError, ValueError):
+        return bool(strtobool(os.environ["_PIP_USE_IMPORTLIB_METADATA"]))
+    if sys.version_info < (3, 11):
+        return False
+    import importlib.metadata
+
+    return bool(getattr(importlib.metadata, "_PIP_USE_IMPORTLIB_METADATA", True))
+
+
+class Backend(Protocol):
+    Distribution: Type[BaseDistribution]
+    Environment: Type[BaseEnvironment]
+
+
+@functools.lru_cache(maxsize=None)
+def select_backend() -> Backend:
+    if _should_use_importlib_metadata():
+        from . import importlib
+
+        return cast(Backend, importlib)
+    from . import pkg_resources
+
+    return cast(Backend, pkg_resources)
+
+
 def get_default_environment() -> BaseEnvironment:
    """Get the default representation for the current environment.

@@ -18,9 +72,7 @@ def get_default_environment() -> BaseEnvironment:
    Environment instance should be built from ``sys.path`` and may use caching
    to share instance state accorss calls.
    """
-    from .pkg_resources import Environment
-
-    return Environment.default()
+    return select_backend().Environment.default()


 def get_environment(paths: Optional[List[str]]) -> BaseEnvironment:
@@ -30,12 +82,19 @@ def get_environment(paths: Optional[List[str]]) -> BaseEnvironment:
    given import paths. The backend must build a fresh instance representing
    the state of installed distributions when this function is called.
    """
-    from .pkg_resources import Environment
-
-    return Environment.from_paths(paths)
+    return select_backend().Environment.from_paths(paths)


-def get_wheel_distribution(wheel_path: str, canonical_name: str) -> BaseDistribution:
+def get_directory_distribution(directory: str) -> BaseDistribution:
+    """Get the distribution metadata representation in the specified directory.
+
+    This returns a Distribution instance from the chosen backend based on
+    the given on-disk ``.dist-info`` directory.
+    """
+    return select_backend().Distribution.from_directory(directory)
+
+
+def get_wheel_distribution(wheel: Wheel, canonical_name: str) -> BaseDistribution:
    """Get the representation of the specified wheel's distribution metadata.

    This returns a Distribution instance from the chosen backend based on
@@ -43,6 +102,26 @@ def get_wheel_distribution(wheel_path: str, canonical_name: str) -> BaseDistribu

    :param canonical_name: Normalized project name of the given wheel.
    """
-    from .pkg_resources import Distribution
+    return select_backend().Distribution.from_wheel(wheel, canonical_name)

-    return Distribution.from_wheel(wheel_path, canonical_name)
+
+def get_metadata_distribution(
+    metadata_contents: bytes,
+    filename: str,
+    canonical_name: str,
+) -> BaseDistribution:
+    """Get the dist representation of the specified METADATA file contents.
+
+    This returns a Distribution instance from the chosen backend sourced from the data
+    in `metadata_contents`.
+
+    :param metadata_contents: Contents of a METADATA file within a dist, or one served
+                              via PEP 658.
+    :param filename: Filename for the dist this metadata represents.
+    :param canonical_name: Normalized project name of the given dist.
+    """
+    return select_backend().Distribution.from_metadata_file_contents(
+        metadata_contents,
+        filename,
+        canonical_name,
+    )
--- a/venv/Lib/site-packages/pip/_internal/metadata/base.py
+++ b/venv/Lib/site-packages/pip/_internal/metadata/base.py
@@ -1,37 +1,56 @@
+import csv
 import email.message
+import functools
 import json
 import logging
+import pathlib
 import re
+import zipfile
 from typing import (
+    IO,
    TYPE_CHECKING,
+    Any,
    Collection,
    Container,
+    Dict,
    Iterable,
    Iterator,
    List,
+    NamedTuple,
    Optional,
+    Tuple,
    Union,
 )

 from pip._vendor.packaging.requirements import Requirement
+from pip._vendor.packaging.specifiers import InvalidSpecifier, SpecifierSet
+from pip._vendor.packaging.utils import NormalizedName
 from pip._vendor.packaging.version import LegacyVersion, Version

+from pip._internal.exceptions import NoneMetadataError
+from pip._internal.locations import site_packages, user_site
 from pip._internal.models.direct_url import (
    DIRECT_URL_METADATA_NAME,
    DirectUrl,
    DirectUrlValidationError,
 )
-from pip._internal.utils.misc import stdlib_pkgs  # TODO: Move definition here.
+from pip._internal.utils.compat import stdlib_pkgs  # TODO: Move definition here.
+from pip._internal.utils.egg_link import egg_link_path_from_sys_path
+from pip._internal.utils.misc import is_local, normalize_path
+from pip._internal.utils.packaging import safe_extra
+from pip._internal.utils.urls import url_to_path
+
+from ._json import msg_to_json

 if TYPE_CHECKING:
    from typing import Protocol
-
-    from pip._vendor.packaging.utils import NormalizedName
 else:
    Protocol = object

 DistributionVersion = Union[LegacyVersion, Version]

+InfoPath = Union[str, pathlib.PurePath]
+
 logger = logging.getLogger(__name__)


@@ -49,7 +68,89 @@ class BaseEntryPoint(Protocol):
        raise NotImplementedError()


+def _convert_installed_files_path(
+    entry: Tuple[str, ...],
+    info: Tuple[str, ...],
+) -> str:
+    """Convert a legacy installed-files.txt path into modern RECORD path.
+
+    The legacy format stores paths relative to the info directory, while the
+    modern format stores paths relative to the package root, e.g. the
+    site-packages directory.
+
+    :param entry: Path parts of the installed-files.txt entry.
+    :param info: Path parts of the egg-info directory relative to package root.
+    :returns: The converted entry.
+
+    For best compatibility with symlinks, this does not use ``abspath()`` or
+    ``Path.resolve()``, but tries to work with path parts:
+
+    1. While ``entry`` starts with ``..``, remove the equal amounts of parts
+       from ``info``; if ``info`` is empty, start appending ``..`` instead.
+    2. Join the two directly.
+    """
+    while entry and entry[0] == "..":
+        if not info or info[-1] == "..":
+            info += ("..",)
+        else:
+            info = info[:-1]
+        entry = entry[1:]
+    return str(pathlib.Path(*info, *entry))
+
+
+class RequiresEntry(NamedTuple):
+    requirement: str
+    extra: str
+    marker: str
+
+
 class BaseDistribution(Protocol):
+    @classmethod
+    def from_directory(cls, directory: str) -> "BaseDistribution":
+        """Load the distribution from a metadata directory.
+
+        :param directory: Path to a metadata directory, e.g. ``.dist-info``.
+        """
+        raise NotImplementedError()
+
+    @classmethod
+    def from_metadata_file_contents(
+        cls,
+        metadata_contents: bytes,
+        filename: str,
+        project_name: str,
+    ) -> "BaseDistribution":
+        """Load the distribution from the contents of a METADATA file.
+
+        This is used to implement PEP 658 by generating a "shallow" dist object that can
+        be used for resolution without downloading or building the actual dist yet.
+
+        :param metadata_contents: The contents of a METADATA file.
+        :param filename: File name for the dist with this metadata.
+        :param project_name: Name of the project this dist represents.
+        """
+        raise NotImplementedError()
+
+    @classmethod
+    def from_wheel(cls, wheel: "Wheel", name: str) -> "BaseDistribution":
+        """Load the distribution from a given wheel.
+
+        :param wheel: A concrete wheel definition.
+        :param name: File name of the wheel.
+
+        :raises InvalidWheel: Whenever loading of the wheel causes a
+            :py:exc:`zipfile.BadZipFile` exception to be thrown.
+        :raises UnsupportedWheel: If the wheel is a valid zip, but malformed
+            internally.
+        """
+        raise NotImplementedError()
+
+    def __repr__(self) -> str:
+        return f"{self.raw_name} {self.version} ({self.location})"
+
+    def __str__(self) -> str:
+        return f"{self.raw_name} {self.version}"
+
    @property
    def location(self) -> Optional[str]:
        """Where the distribution is loaded from.
@@ -65,8 +166,43 @@ class BaseDistribution(Protocol):
        raise NotImplementedError()

    @property
-    def info_directory(self) -> Optional[str]:
-        """Location of the .[egg|dist]-info directory.
+    def editable_project_location(self) -> Optional[str]:
+        """The project location for editable distributions.
+
+        This is the directory where pyproject.toml or setup.py is located.
+        None if the distribution is not installed in editable mode.
+        """
+        # TODO: this property is relatively costly to compute, memoize it ?
+        direct_url = self.direct_url
+        if direct_url:
+            if direct_url.is_local_editable():
+                return url_to_path(direct_url.url)
+        else:
+            # Search for an .egg-link file by walking sys.path, as it was
+            # done before by dist_is_editable().
+            egg_link_path = egg_link_path_from_sys_path(self.raw_name)
+            if egg_link_path:
+                # TODO: get project location from second line of egg_link file
+                #       (https://github.com/pypa/pip/issues/10243)
+                return self.location
+        return None
+
+    @property
+    def installed_location(self) -> Optional[str]:
+        """The distribution's "installed" location.
+
+        This should generally be a ``site-packages`` directory. This is
+        usually ``dist.location``, except for legacy develop-installed packages,
+        where ``dist.location`` is the source code location, and this is where
+        the ``.egg-link`` file is.
+
+        The returned location is normalized (in particular, with symlinks removed).
+        """
+        raise NotImplementedError()
+
+    @property
+    def info_location(self) -> Optional[str]:
+        """Location of the .[egg|dist]-info directory or file.

        Similarly to ``location``, a string value is not necessarily a
        filesystem path. ``None`` means the distribution is created in-memory.
@@ -81,13 +217,80 @@ class BaseDistribution(Protocol):
        raise NotImplementedError()

    @property
-    def canonical_name(self) -> "NormalizedName":
+    def installed_by_distutils(self) -> bool:
+        """Whether this distribution is installed with legacy distutils format.
+
+        A distribution installed with "raw" distutils not patched by setuptools
+        uses one single file at ``info_location`` to store metadata. We need to
+        treat this specially on uninstallation.
+        """
+        info_location = self.info_location
+        if not info_location:
+            return False
+        return pathlib.Path(info_location).is_file()
+
+    @property
+    def installed_as_egg(self) -> bool:
+        """Whether this distribution is installed as an egg.
+
+        This usually indicates the distribution was installed by (older versions
+        of) easy_install.
+        """
+        location = self.location
+        if not location:
+            return False
+        return location.endswith(".egg")
+
+    @property
+    def installed_with_setuptools_egg_info(self) -> bool:
+        """Whether this distribution is installed with the ``.egg-info`` format.
+
+        This usually indicates the distribution was installed with setuptools
+        with an old pip version or with ``single-version-externally-managed``.
+
+        Note that this ensure the metadata store is a directory. distutils can
+        also installs an ``.egg-info``, but as a file, not a directory. This
+        property is *False* for that case. Also see ``installed_by_distutils``.
+        """
+        info_location = self.info_location
+        if not info_location:
+            return False
+        if not info_location.endswith(".egg-info"):
+            return False
+        return pathlib.Path(info_location).is_dir()
+
+    @property
+    def installed_with_dist_info(self) -> bool:
+        """Whether this distribution is installed with the "modern format".
+
+        This indicates a "modern" installation, e.g. storing metadata in the
+        ``.dist-info`` directory. This applies to installations made by
+        setuptools (but through pip, not directly), or anything using the
+        standardized build backend interface (PEP 517).
+        """
+        info_location = self.info_location
+        if not info_location:
+            return False
+        if not info_location.endswith(".dist-info"):
+            return False
+        return pathlib.Path(info_location).is_dir()
+
+    @property
+    def canonical_name(self) -> NormalizedName:
        raise NotImplementedError()

    @property
    def version(self) -> DistributionVersion:
        raise NotImplementedError()

+    @property
+    def setuptools_filename(self) -> str:
+        """Convert a project name to its setuptools-compatible filename.
+
+        This is a copy of ``pkg_resources.to_filename()`` for compatibility.
+        """
+        return self.raw_name.replace("-", "_")
+
    @property
    def direct_url(self) -> Optional[DirectUrl]:
        """Obtain a DirectUrl from this distribution.
@@ -116,39 +319,102 @@ class BaseDistribution(Protocol):

    @property
    def installer(self) -> str:
-        raise NotImplementedError()
+        try:
+            installer_text = self.read_text("INSTALLER")
+        except (OSError, ValueError, NoneMetadataError):
+            return ""  # Fail silently if the installer file cannot be read.
+        for line in installer_text.splitlines():
+            cleaned_line = line.strip()
+            if cleaned_line:
+                return cleaned_line
+        return ""
+
+    @property
+    def requested(self) -> bool:
+        return self.is_file("REQUESTED")

    @property
    def editable(self) -> bool:
-        raise NotImplementedError()
+        return bool(self.editable_project_location)

    @property
    def local(self) -> bool:
-        raise NotImplementedError()
+        """If distribution is installed in the current virtual environment.
+
+        Always True if we're not in a virtualenv.
+        """
+        if self.installed_location is None:
+            return False
+        return is_local(self.installed_location)

    @property
    def in_usersite(self) -> bool:
-        raise NotImplementedError()
+        if self.installed_location is None or user_site is None:
+            return False
+        return self.installed_location.startswith(normalize_path(user_site))

    @property
    def in_site_packages(self) -> bool:
+        if self.installed_location is None or site_packages is None:
+            return False
+        return self.installed_location.startswith(normalize_path(site_packages))
+
+    def is_file(self, path: InfoPath) -> bool:
+        """Check whether an entry in the info directory is a file."""
        raise NotImplementedError()

-    def read_text(self, name: str) -> str:
-        """Read a file in the .dist-info (or .egg-info) directory.
+    def iter_distutils_script_names(self) -> Iterator[str]:
+        """Find distutils 'scripts' entries metadata.

-        Should raise ``FileNotFoundError`` if ``name`` does not exist in the
-        metadata directory.
+        If 'scripts' is supplied in ``setup.py``, distutils records those in the
+        installed distribution's ``scripts`` directory, a file for each script.
+        """
+        raise NotImplementedError()
+
+    def read_text(self, path: InfoPath) -> str:
+        """Read a file in the info directory.
+
+        :raise FileNotFoundError: If ``path`` does not exist in the directory.
+        :raise NoneMetadataError: If ``path`` exists in the info directory, but
+            cannot be read.
        """
        raise NotImplementedError()

    def iter_entry_points(self) -> Iterable[BaseEntryPoint]:
        raise NotImplementedError()

+    def _metadata_impl(self) -> email.message.Message:
+        raise NotImplementedError()
+
+    @functools.lru_cache(maxsize=1)
+    def _metadata_cached(self) -> email.message.Message:
+        # When we drop python 3.7 support, move this to the metadata property and use
+        # functools.cached_property instead of lru_cache.
+        metadata = self._metadata_impl()
+        self._add_egg_info_requires(metadata)
+        return metadata
+
    @property
    def metadata(self) -> email.message.Message:
-        """Metadata of distribution parsed from e.g. METADATA or PKG-INFO."""
-        raise NotImplementedError()
+        """Metadata of distribution parsed from e.g. METADATA or PKG-INFO.
+
+        This should return an empty message if the metadata file is unavailable.
+
+        :raises NoneMetadataError: If the metadata file is available, but does
+            not contain valid metadata.
+        """
+        return self._metadata_cached()
+
+    @property
+    def metadata_dict(self) -> Dict[str, Any]:
+        """PEP 566 compliant JSON-serializable representation of METADATA or PKG-INFO.
+
+        This should return an empty dict if the metadata file is unavailable.
+
+        :raises NoneMetadataError: If the metadata file is available, but does
+            not contain valid metadata.
+        """
+        return msg_to_json(self.metadata)

    @property
    def metadata_version(self) -> Optional[str]:
@@ -159,12 +425,159 @@ class BaseDistribution(Protocol):
    def raw_name(self) -> str:
        """Value of "Name:" in distribution metadata."""
        # The metadata should NEVER be missing the Name: key, but if it somehow
-        # does not, fall back to the known canonical name.
+        # does, fall back to the known canonical name.
        return self.metadata.get("Name", self.canonical_name)

+    @property
+    def requires_python(self) -> SpecifierSet:
+        """Value of "Requires-Python:" in distribution metadata.
+
+        If the key does not exist or contains an invalid value, an empty
+        SpecifierSet should be returned.
+        """
+        value = self.metadata.get("Requires-Python")
+        if value is None:
+            return SpecifierSet()
+        try:
+            # Convert to str to satisfy the type checker; this can be a Header object.
+            spec = SpecifierSet(str(value))
+        except InvalidSpecifier as e:
+            message = "Package %r has an invalid Requires-Python: %s"
+            logger.warning(message, self.raw_name, e)
+            return SpecifierSet()
+        return spec
+
    def iter_dependencies(self, extras: Collection[str] = ()) -> Iterable[Requirement]:
+        """Dependencies of this distribution.
+
+        For modern .dist-info distributions, this is the collection of
+        "Requires-Dist:" entries in distribution metadata.
+        """
        raise NotImplementedError()

+    def iter_provided_extras(self) -> Iterable[str]:
+        """Extras provided by this distribution.
+
+        For modern .dist-info distributions, this is the collection of
+        "Provides-Extra:" entries in distribution metadata.
+        """
+        raise NotImplementedError()
+
+    def _iter_declared_entries_from_record(self) -> Optional[Iterator[str]]:
+        try:
+            text = self.read_text("RECORD")
+        except FileNotFoundError:
+            return None
+        # This extra Path-str cast normalizes entries.
+        return (str(pathlib.Path(row[0])) for row in csv.reader(text.splitlines()))
+
+    def _iter_declared_entries_from_legacy(self) -> Optional[Iterator[str]]:
+        try:
+            text = self.read_text("installed-files.txt")
+        except FileNotFoundError:
+            return None
+        paths = (p for p in text.splitlines(keepends=False) if p)
+        root = self.location
+        info = self.info_location
+        if root is None or info is None:
+            return paths
+        try:
+            info_rel = pathlib.Path(info).relative_to(root)
+        except ValueError:  # info is not relative to root.
+            return paths
+        if not info_rel.parts:  # info *is* root.
+            return paths
+        return (
+            _convert_installed_files_path(pathlib.Path(p).parts, info_rel.parts)
+            for p in paths
+        )
+
+    def iter_declared_entries(self) -> Optional[Iterator[str]]:
+        """Iterate through file entries declared in this distribution.
+
+        For modern .dist-info distributions, this is the files listed in the
+        ``RECORD`` metadata file. For legacy setuptools distributions, this
+        comes from ``installed-files.txt``, with entries normalized to be
+        compatible with the format used by ``RECORD``.
+
+        :return: An iterator for listed entries, or None if the distribution
+            contains neither ``RECORD`` nor ``installed-files.txt``.
+        """
+        return (
+            self._iter_declared_entries_from_record()
+            or self._iter_declared_entries_from_legacy()
+        )
+
+    def _iter_requires_txt_entries(self) -> Iterator[RequiresEntry]:
+        """Parse a ``requires.txt`` in an egg-info directory.
+
+        This is an INI-ish format where an egg-info stores dependencies. A
+        section name describes extra other environment markers, while each entry
+        is an arbitrary string (not a key-value pair) representing a dependency
+        as a requirement string (no markers).
+
+        There is a construct in ``importlib.metadata`` called ``Sectioned`` that
+        does mostly the same, but the format is currently considered private.
+        """
+        try:
+            content = self.read_text("requires.txt")
+        except FileNotFoundError:
+            return
+        extra = marker = ""  # Section-less entries don't have markers.
+        for line in content.splitlines():
+            line = line.strip()
+            if not line or line.startswith("#"):  # Comment; ignored.
+                continue
+            if line.startswith("[") and line.endswith("]"):  # A section header.
+                extra, _, marker = line.strip("[]").partition(":")
+                continue
+            yield RequiresEntry(requirement=line, extra=extra, marker=marker)
+
+    def _iter_egg_info_extras(self) -> Iterable[str]:
+        """Get extras from the egg-info directory."""
+        known_extras = {""}
+        for entry in self._iter_requires_txt_entries():
+            if entry.extra in known_extras:
+                continue
+            known_extras.add(entry.extra)
+            yield entry.extra
+
+    def _iter_egg_info_dependencies(self) -> Iterable[str]:
+        """Get distribution dependencies from the egg-info directory.
+
+        To ease parsing, this converts a legacy dependency entry into a PEP 508
+        requirement string. Like ``_iter_requires_txt_entries()``, there is code
+        in ``importlib.metadata`` that does mostly the same, but not do exactly
+        what we need.
+
+        Namely, ``importlib.metadata`` does not normalize the extra name before
+        putting it into the requirement string, which causes marker comparison
+        to fail because the dist-info format do normalize. This is consistent in
+        all currently available PEP 517 backends, although not standardized.
+        """
+        for entry in self._iter_requires_txt_entries():
+            if entry.extra and entry.marker:
+                marker = f'({entry.marker}) and extra == "{safe_extra(entry.extra)}"'
+            elif entry.extra:
+                marker = f'extra == "{safe_extra(entry.extra)}"'
+            elif entry.marker:
+                marker = entry.marker
+            else:
+                marker = ""
+            if marker:
+                yield f"{entry.requirement} ; {marker}"
+            else:
+                yield entry.requirement
+
+    def _add_egg_info_requires(self, metadata: email.message.Message) -> None:
+        """Add egg-info requires.txt information to the metadata."""
+        if not metadata.get_all("Requires-Dist"):
+            for dep in self._iter_egg_info_dependencies():
+                metadata["Requires-Dist"] = dep
+        if not metadata.get_all("Provides-Extra"):
+            for extra in self._iter_egg_info_extras():
+                metadata["Provides-Extra"] = extra
+

 class BaseEnvironment:
    """An environment containing distributions to introspect."""
@@ -178,7 +591,11 @@ class BaseEnvironment:
        raise NotImplementedError()

    def get_distribution(self, name: str) -> Optional["BaseDistribution"]:
-        """Given a requirement name, return the installed distributions."""
+        """Given a requirement name, return the installed distributions.
+
+        The name may not be normalized. The implementation must canonicalize
+        it for lookup.
+        """
        raise NotImplementedError()

    def _iter_distributions(self) -> Iterator["BaseDistribution"]:
@@ -190,8 +607,8 @@ class BaseEnvironment:
        """
        raise NotImplementedError()

-    def iter_distributions(self) -> Iterator["BaseDistribution"]:
-        """Iterate through installed distributions."""
+    def iter_all_distributions(self) -> Iterator[BaseDistribution]:
+        """Iterate through all installed distributions without any filtering."""
        for dist in self._iter_distributions():
            # Make sure the distribution actually comes from a valid Python
            # packaging distribution. Pip's AdjacentTempDirectory leaves folders
@@ -221,6 +638,11 @@ class BaseEnvironment:
    ) -> Iterator[BaseDistribution]:
        """Return a list of installed distributions.

+        This is based on ``iter_all_distributions()`` with additional filtering
+        options. Note that ``iter_installed_distributions()`` without arguments
+        is *not* equal to ``iter_all_distributions()``, since some of the
+        configurations exclude packages by default.
+
        :param local_only: If True (default), only return installations
        local to the current virtualenv, if in a virtualenv.
        :param skip: An iterable of canonicalized project names to ignore;
@@ -230,7 +652,7 @@ class BaseEnvironment:
        :param user_only: If True, only report installations in the user
        site directory.
        """
-        it = self.iter_distributions()
+        it = self.iter_all_distributions()
        if local_only:
            it = (d for d in it if d.local)
        if not include_editables:
@@ -240,3 +662,27 @@ class BaseEnvironment:
        if user_only:
            it = (d for d in it if d.in_usersite)
        return (d for d in it if d.canonical_name not in skip)
+
+
+class Wheel(Protocol):
+    location: str
+
+    def as_zipfile(self) -> zipfile.ZipFile:
+        raise NotImplementedError()
+
+
+class FilesystemWheel(Wheel):
+    def __init__(self, location: str) -> None:
+        self.location = location
+
+    def as_zipfile(self) -> zipfile.ZipFile:
+        return zipfile.ZipFile(self.location, allowZip64=True)
+
+
+class MemoryWheel(Wheel):
+    def __init__(self, location: str, stream: IO[bytes]) -> None:
+        self.location = location
+        self.stream = stream
+
+    def as_zipfile(self) -> zipfile.ZipFile:
+        return zipfile.ZipFile(self.stream, allowZip64=True)
--- a/venv/Lib/site-packages/pip/_internal/metadata/pkg_resources.py
+++ b/venv/Lib/site-packages/pip/_internal/metadata/pkg_resources.py
@@ -1,29 +1,28 @@
 import email.message
+import email.parser
 import logging
+import os
 import zipfile
-from typing import (
-    TYPE_CHECKING,
-    Collection,
-    Iterable,
-    Iterator,
-    List,
-    NamedTuple,
-    Optional,
-)
+from typing import Collection, Iterable, Iterator, List, Mapping, NamedTuple, Optional

 from pip._vendor import pkg_resources
 from pip._vendor.packaging.requirements import Requirement
-from pip._vendor.packaging.utils import canonicalize_name
+from pip._vendor.packaging.utils import NormalizedName, canonicalize_name
 from pip._vendor.packaging.version import parse as parse_version

-from pip._internal.utils import misc  # TODO: Move definition here.
-from pip._internal.utils.packaging import get_installer, get_metadata
-from pip._internal.utils.wheel import pkg_resources_distribution_for_wheel
+from pip._internal.exceptions import InvalidWheel, NoneMetadataError, UnsupportedWheel
+from pip._internal.utils.egg_link import egg_link_path_from_location
+from pip._internal.utils.misc import display_path, normalize_path
+from pip._internal.utils.wheel import parse_wheel, read_wheel_metadata_file

-from .base import BaseDistribution, BaseEntryPoint, BaseEnvironment, DistributionVersion
-
-if TYPE_CHECKING:
-    from pip._vendor.packaging.utils import NormalizedName
+from .base import (
+    BaseDistribution,
+    BaseEntryPoint,
+    BaseEnvironment,
+    DistributionVersion,
+    InfoPath,
+    Wheel,
+)

 logger = logging.getLogger(__name__)

@@ -34,14 +33,101 @@ class EntryPoint(NamedTuple):
    group: str


+class InMemoryMetadata:
+    """IMetadataProvider that reads metadata files from a dictionary.
+
+    This also maps metadata decoding exceptions to our internal exception type.
+    """
+
+    def __init__(self, metadata: Mapping[str, bytes], wheel_name: str) -> None:
+        self._metadata = metadata
+        self._wheel_name = wheel_name
+
+    def has_metadata(self, name: str) -> bool:
+        return name in self._metadata
+
+    def get_metadata(self, name: str) -> str:
+        try:
+            return self._metadata[name].decode()
+        except UnicodeDecodeError as e:
+            # Augment the default error with the origin of the file.
+            raise UnsupportedWheel(
+                f"Error decoding metadata for {self._wheel_name}: {e} in {name} file"
+            )
+
+    def get_metadata_lines(self, name: str) -> Iterable[str]:
+        return pkg_resources.yield_lines(self.get_metadata(name))
+
+    def metadata_isdir(self, name: str) -> bool:
+        return False
+
+    def metadata_listdir(self, name: str) -> List[str]:
+        return []
+
+    def run_script(self, script_name: str, namespace: str) -> None:
+        pass
+
+
 class Distribution(BaseDistribution):
    def __init__(self, dist: pkg_resources.Distribution) -> None:
        self._dist = dist

    @classmethod
-    def from_wheel(cls, path: str, name: str) -> "Distribution":
-        with zipfile.ZipFile(path, allowZip64=True) as zf:
-            dist = pkg_resources_distribution_for_wheel(zf, name, path)
+    def from_directory(cls, directory: str) -> BaseDistribution:
+        dist_dir = directory.rstrip(os.sep)
+
+        # Build a PathMetadata object, from path to metadata. :wink:
+        base_dir, dist_dir_name = os.path.split(dist_dir)
+        metadata = pkg_resources.PathMetadata(base_dir, dist_dir)
+
+        # Determine the correct Distribution object type.
+        if dist_dir.endswith(".egg-info"):
+            dist_cls = pkg_resources.Distribution
+            dist_name = os.path.splitext(dist_dir_name)[0]
+        else:
+            assert dist_dir.endswith(".dist-info")
+            dist_cls = pkg_resources.DistInfoDistribution
+            dist_name = os.path.splitext(dist_dir_name)[0].split("-")[0]
+
+        dist = dist_cls(base_dir, project_name=dist_name, metadata=metadata)
+        return cls(dist)
+
+    @classmethod
+    def from_metadata_file_contents(
+        cls,
+        metadata_contents: bytes,
+        filename: str,
+        project_name: str,
+    ) -> BaseDistribution:
+        metadata_dict = {
+            "METADATA": metadata_contents,
+        }
+        dist = pkg_resources.DistInfoDistribution(
+            location=filename,
+            metadata=InMemoryMetadata(metadata_dict, filename),
+            project_name=project_name,
+        )
+        return cls(dist)
+
+    @classmethod
+    def from_wheel(cls, wheel: Wheel, name: str) -> BaseDistribution:
+        try:
+            with wheel.as_zipfile() as zf:
+                info_dir, _ = parse_wheel(zf, name)
+                metadata_dict = {
+                    path.split("/", 1)[-1]: read_wheel_metadata_file(zf, path)
+                    for path in zf.namelist()
+                    if path.startswith(f"{info_dir}/")
+                }
+        except zipfile.BadZipFile as e:
+            raise InvalidWheel(wheel.location, name) from e
+        except UnsupportedWheel as e:
+            raise UnsupportedWheel(f"{name} has an invalid wheel, {e}")
+        dist = pkg_resources.DistInfoDistribution(
+            location=wheel.location,
+            metadata=InMemoryMetadata(metadata_dict, wheel.location),
+            project_name=name,
+        )
        return cls(dist)

    @property
@@ -49,41 +135,52 @@ class Distribution(BaseDistribution):
        return self._dist.location

    @property
-    def info_directory(self) -> Optional[str]:
+    def installed_location(self) -> Optional[str]:
+        egg_link = egg_link_path_from_location(self.raw_name)
+        if egg_link:
+            location = egg_link
+        elif self.location:
+            location = self.location
+        else:
+            return None
+        return normalize_path(location)
+
+    @property
+    def info_location(self) -> Optional[str]:
        return self._dist.egg_info

    @property
-    def canonical_name(self) -> "NormalizedName":
+    def installed_by_distutils(self) -> bool:
+        # A distutils-installed distribution is provided by FileMetadata. This
+        # provider has a "path" attribute not present anywhere else. Not the
+        # best introspection logic, but pip has been doing this for a long time.
+        try:
+            return bool(self._dist._provider.path)
+        except AttributeError:
+            return False
+
+    @property
+    def canonical_name(self) -> NormalizedName:
        return canonicalize_name(self._dist.project_name)

    @property
    def version(self) -> DistributionVersion:
        return parse_version(self._dist.version)

-    @property
-    def installer(self) -> str:
-        return get_installer(self._dist)
+    def is_file(self, path: InfoPath) -> bool:
+        return self._dist.has_metadata(str(path))

-    @property
-    def editable(self) -> bool:
-        return misc.dist_is_editable(self._dist)
+    def iter_distutils_script_names(self) -> Iterator[str]:
+        yield from self._dist.metadata_listdir("scripts")

-    @property
-    def local(self) -> bool:
-        return misc.dist_is_local(self._dist)
-
-    @property
-    def in_usersite(self) -> bool:
-        return misc.dist_in_usersite(self._dist)
-
-    @property
-    def in_site_packages(self) -> bool:
-        return misc.dist_in_site_packages(self._dist)
-
-    def read_text(self, name: str) -> str:
+    def read_text(self, path: InfoPath) -> str:
+        name = str(path)
        if not self._dist.has_metadata(name):
            raise FileNotFoundError(name)
-        return self._dist.get_metadata(name)
+        content = self._dist.get_metadata(name)
+        if content is None:
+            raise NoneMetadataError(self, name)
+        return content

    def iter_entry_points(self) -> Iterable[BaseEntryPoint]:
        for group, entries in self._dist.get_entry_map().items():
@@ -91,15 +188,36 @@ class Distribution(BaseDistribution):
                name, _, value = str(entry_point).partition("=")
                yield EntryPoint(name=name.strip(), value=value.strip(), group=group)

-    @property
-    def metadata(self) -> email.message.Message:
-        return get_metadata(self._dist)
+    def _metadata_impl(self) -> email.message.Message:
+        """
+        :raises NoneMetadataError: if the distribution reports `has_metadata()`
+            True but `get_metadata()` returns None.
+        """
+        if isinstance(self._dist, pkg_resources.DistInfoDistribution):
+            metadata_name = "METADATA"
+        else:
+            metadata_name = "PKG-INFO"
+        try:
+            metadata = self.read_text(metadata_name)
+        except FileNotFoundError:
+            if self.location:
+                displaying_path = display_path(self.location)
+            else:
+                displaying_path = repr(self.location)
+            logger.warning("No metadata found in %s", displaying_path)
+            metadata = ""
+        feed_parser = email.parser.FeedParser()
+        feed_parser.feed(metadata)
+        return feed_parser.close()

    def iter_dependencies(self, extras: Collection[str] = ()) -> Iterable[Requirement]:
        if extras:  # pkg_resources raises on invalid extras, so we sanitize.
            extras = frozenset(extras).intersection(self._dist.extras)
        return self._dist.requires(extras)

+    def iter_provided_extras(self) -> Iterable[str]:
+        return self._dist.extras
+

 class Environment(BaseEnvironment):
    def __init__(self, ws: pkg_resources.WorkingSet) -> None:
@@ -113,6 +231,10 @@ class Environment(BaseEnvironment):
    def from_paths(cls, paths: Optional[List[str]]) -> BaseEnvironment:
        return cls(pkg_resources.WorkingSet(paths))

+    def _iter_distributions(self) -> Iterator[BaseDistribution]:
+        for dist in self._ws:
+            yield Distribution(dist)
+
    def _search_distribution(self, name: str) -> Optional[BaseDistribution]:
        """Find a distribution matching the ``name`` in the environment.

@@ -120,13 +242,12 @@ class Environment(BaseEnvironment):
        match the behavior of ``pkg_resources.get_distribution()``.
        """
        canonical_name = canonicalize_name(name)
-        for dist in self.iter_distributions():
+        for dist in self.iter_all_distributions():
            if dist.canonical_name == canonical_name:
                return dist
        return None

    def get_distribution(self, name: str) -> Optional[BaseDistribution]:
-
        # Search the distribution by looking through the working set.
        dist = self._search_distribution(name)
        if dist:
@@ -147,7 +268,3 @@ class Environment(BaseEnvironment):
        except pkg_resources.DistributionNotFound:
            return None
        return self._search_distribution(name)
-
-    def _iter_distributions(self) -> Iterator[BaseDistribution]:
-        for dist in self._ws:
-            yield Distribution(dist)
--- a/venv/Lib/site-packages/pip/_internal/models/candidate.py
+++ b/venv/Lib/site-packages/pip/_internal/models/candidate.py
@@ -5,8 +5,7 @@ from pip._internal.utils.models import KeyBasedCompareMixin


 class InstallationCandidate(KeyBasedCompareMixin):
-    """Represents a potential "candidate" for installation.
-    """
+    """Represents a potential "candidate" for installation."""

    __slots__ = ["name", "version", "link"]

@@ -17,15 +16,19 @@ class InstallationCandidate(KeyBasedCompareMixin):

        super().__init__(
            key=(self.name, self.version, self.link),
-            defining_class=InstallationCandidate
+            defining_class=InstallationCandidate,
        )

    def __repr__(self) -> str:
        return "<InstallationCandidate({!r}, {!r}, {!r})>".format(
-            self.name, self.version, self.link,
+            self.name,
+            self.version,
+            self.link,
        )

    def __str__(self) -> str:
-        return '{!r} candidate (version {} at {})'.format(
-            self.name, self.version, self.link,
+        return "{!r} candidate (version {} at {})".format(
+            self.name,
+            self.version,
+            self.link,
        )
--- a/venv/Lib/site-packages/pip/_internal/models/direct_url.py
+++ b/venv/Lib/site-packages/pip/_internal/models/direct_url.py
@@ -74,14 +74,10 @@ class VcsInfo:
        vcs: str,
        commit_id: str,
        requested_revision: Optional[str] = None,
-        resolved_revision: Optional[str] = None,
-        resolved_revision_type: Optional[str] = None,
    ) -> None:
        self.vcs = vcs
        self.requested_revision = requested_revision
        self.commit_id = commit_id
-        self.resolved_revision = resolved_revision
-        self.resolved_revision_type = resolved_revision_type

    @classmethod
    def _from_dict(cls, d: Optional[Dict[str, Any]]) -> Optional["VcsInfo"]:
@@ -91,8 +87,6 @@ class VcsInfo:
            vcs=_get_required(d, str, "vcs"),
            commit_id=_get_required(d, str, "commit_id"),
            requested_revision=_get(d, str, "requested_revision"),
-            resolved_revision=_get(d, str, "resolved_revision"),
-            resolved_revision_type=_get(d, str, "resolved_revision_type"),
        )

    def _to_dict(self) -> Dict[str, Any]:
@@ -100,8 +94,6 @@ class VcsInfo:
            vcs=self.vcs,
            requested_revision=self.requested_revision,
            commit_id=self.commit_id,
-            resolved_revision=self.resolved_revision,
-            resolved_revision_type=self.resolved_revision_type,
        )


@@ -111,17 +103,42 @@ class ArchiveInfo:
    def __init__(
        self,
        hash: Optional[str] = None,
+        hashes: Optional[Dict[str, str]] = None,
    ) -> None:
+        # set hashes before hash, since the hash setter will further populate hashes
+        self.hashes = hashes
        self.hash = hash

+    @property
+    def hash(self) -> Optional[str]:
+        return self._hash
+
+    @hash.setter
+    def hash(self, value: Optional[str]) -> None:
+        if value is not None:
+            # Auto-populate the hashes key to upgrade to the new format automatically.
+            # We don't back-populate the legacy hash key from hashes.
+            try:
+                hash_name, hash_value = value.split("=", 1)
+            except ValueError:
+                raise DirectUrlValidationError(
+                    f"invalid archive_info.hash format: {value!r}"
+                )
+            if self.hashes is None:
+                self.hashes = {hash_name: hash_value}
+            elif hash_name not in self.hashes:
+                self.hashes = self.hashes.copy()
+                self.hashes[hash_name] = hash_value
+        self._hash = value
+
    @classmethod
    def _from_dict(cls, d: Optional[Dict[str, Any]]) -> Optional["ArchiveInfo"]:
        if d is None:
            return None
-        return cls(hash=_get(d, str, "hash"))
+        return cls(hash=_get(d, str, "hash"), hashes=_get(d, dict, "hashes"))

    def _to_dict(self) -> Dict[str, Any]:
-        return _filter_none(hash=self.hash)
+        return _filter_none(hash=self.hash, hashes=self.hashes)


 class DirInfo:
@@ -137,9 +154,7 @@ class DirInfo:
    def _from_dict(cls, d: Optional[Dict[str, Any]]) -> Optional["DirInfo"]:
        if d is None:
            return None
-        return cls(
-            editable=_get_required(d, bool, "editable", default=False)
-        )
+        return cls(editable=_get_required(d, bool, "editable", default=False))

    def _to_dict(self) -> Dict[str, Any]:
        return _filter_none(editable=self.editable or None)
@@ -149,7 +164,6 @@ InfoType = Union[ArchiveInfo, DirInfo, VcsInfo]


 class DirectUrl:
-
    def __init__(
        self,
        url: str,
@@ -165,9 +179,9 @@ class DirectUrl:
            return netloc
        user_pass, netloc_no_user_pass = netloc.split("@", 1)
        if (
-            isinstance(self.info, VcsInfo) and
-            self.info.vcs == "git" and
-            user_pass == "git"
+            isinstance(self.info, VcsInfo)
+            and self.info.vcs == "git"
+            and user_pass == "git"
        ):
            return netloc
        if ENV_VAR_RE.match(user_pass):
@@ -218,3 +232,6 @@ class DirectUrl:

    def to_json(self) -> str:
        return json.dumps(self.to_dict(), sort_keys=True)
+
+    def is_local_editable(self) -> bool:
+        return isinstance(self.info, DirInfo) and self.info.editable
--- a/venv/Lib/site-packages/pip/_internal/models/format_control.py
+++ b/venv/Lib/site-packages/pip/_internal/models/format_control.py
@@ -6,15 +6,14 @@ from pip._internal.exceptions import CommandError


 class FormatControl:
-    """Helper for managing formats from which a package can be installed.
-    """
+    """Helper for managing formats from which a package can be installed."""

    __slots__ = ["no_binary", "only_binary"]

    def __init__(
        self,
        no_binary: Optional[Set[str]] = None,
-        only_binary: Optional[Set[str]] = None
+        only_binary: Optional[Set[str]] = None,
    ) -> None:
        if no_binary is None:
            no_binary = set()
@@ -31,35 +30,30 @@ class FormatControl:
        if self.__slots__ != other.__slots__:
            return False

-        return all(
-            getattr(self, k) == getattr(other, k)
-            for k in self.__slots__
-        )
+        return all(getattr(self, k) == getattr(other, k) for k in self.__slots__)

    def __repr__(self) -> str:
        return "{}({}, {})".format(
-            self.__class__.__name__,
-            self.no_binary,
-            self.only_binary
+            self.__class__.__name__, self.no_binary, self.only_binary
        )

    @staticmethod
    def handle_mutual_excludes(value: str, target: Set[str], other: Set[str]) -> None:
-        if value.startswith('-'):
+        if value.startswith("-"):
            raise CommandError(
                "--no-binary / --only-binary option requires 1 argument."
            )
-        new = value.split(',')
-        while ':all:' in new:
+        new = value.split(",")
+        while ":all:" in new:
            other.clear()
            target.clear()
-            target.add(':all:')
-            del new[:new.index(':all:') + 1]
+            target.add(":all:")
+            del new[: new.index(":all:") + 1]
            # Without a none, we want to discard everything as :all: covers it
-            if ':none:' not in new:
+            if ":none:" not in new:
                return
        for name in new:
-            if name == ':none:':
+            if name == ":none:":
                target.clear()
                continue
            name = canonicalize_name(name)
@@ -69,16 +63,18 @@ class FormatControl:
    def get_allowed_formats(self, canonical_name: str) -> FrozenSet[str]:
        result = {"binary", "source"}
        if canonical_name in self.only_binary:
-            result.discard('source')
+            result.discard("source")
        elif canonical_name in self.no_binary:
-            result.discard('binary')
-        elif ':all:' in self.only_binary:
-            result.discard('source')
-        elif ':all:' in self.no_binary:
-            result.discard('binary')
+            result.discard("binary")
+        elif ":all:" in self.only_binary:
+            result.discard("source")
+        elif ":all:" in self.no_binary:
+            result.discard("binary")
        return frozenset(result)

    def disallow_binaries(self) -> None:
        self.handle_mutual_excludes(
-            ':all:', self.no_binary, self.only_binary,
+            ":all:",
+            self.no_binary,
+            self.only_binary,
        )
--- a/venv/Lib/site-packages/pip/_internal/models/index.py
+++ b/venv/Lib/site-packages/pip/_internal/models/index.py
@@ -2,18 +2,16 @@ import urllib.parse


 class PackageIndex:
-    """Represents a Package Index and provides easier access to endpoints
-    """
+    """Represents a Package Index and provides easier access to endpoints"""

-    __slots__ = ['url', 'netloc', 'simple_url', 'pypi_url',
-                 'file_storage_domain']
+    __slots__ = ["url", "netloc", "simple_url", "pypi_url", "file_storage_domain"]

    def __init__(self, url: str, file_storage_domain: str) -> None:
        super().__init__()
        self.url = url
        self.netloc = urllib.parse.urlsplit(url).netloc
-        self.simple_url = self._url_for_path('simple')
-        self.pypi_url = self._url_for_path('pypi')
+        self.simple_url = self._url_for_path("simple")
+        self.pypi_url = self._url_for_path("pypi")

        # This is part of a temporary hack used to block installs of PyPI
        # packages which depend on external urls only necessary until PyPI can
@@ -24,9 +22,7 @@ class PackageIndex:
        return urllib.parse.urljoin(self.url, path)


-PyPI = PackageIndex(
-    'https://pypi.org/', file_storage_domain='files.pythonhosted.org'
-)
+PyPI = PackageIndex("https://pypi.org/", file_storage_domain="files.pythonhosted.org")
 TestPyPI = PackageIndex(
-    'https://test.pypi.org/', file_storage_domain='test-files.pythonhosted.org'
+    "https://test.pypi.org/", file_storage_domain="test-files.pythonhosted.org"
 )
--- a/venv/Lib/site-packages/pip/_internal/models/link.py
+++ b/venv/Lib/site-packages/pip/_internal/models/link.py
@@ -1,14 +1,28 @@
 import functools
+import itertools
 import logging
 import os
 import posixpath
 import re
 import urllib.parse
-from typing import TYPE_CHECKING, Dict, List, NamedTuple, Optional, Tuple, Union
+from dataclasses import dataclass
+from typing import (
+    TYPE_CHECKING,
+    Any,
+    Dict,
+    List,
+    Mapping,
+    NamedTuple,
+    Optional,
+    Tuple,
+    Union,
+)

+from pip._internal.utils.deprecation import deprecated
 from pip._internal.utils.filetypes import WHEEL_EXTENSION
 from pip._internal.utils.hashes import Hashes
 from pip._internal.utils.misc import (
+    pairwise,
    redact_auth_from_url,
    split_auth_from_netloc,
    splitext,
@@ -17,38 +31,172 @@ from pip._internal.utils.models import KeyBasedCompareMixin
 from pip._internal.utils.urls import path_to_url, url_to_path

 if TYPE_CHECKING:
-    from pip._internal.index.collector import HTMLPage
+    from pip._internal.index.collector import IndexContent

 logger = logging.getLogger(__name__)


-_SUPPORTED_HASHES = ("sha1", "sha224", "sha384", "sha256", "sha512", "md5")
+# Order matters, earlier hashes have a precedence over later hashes for what
+# we will pick to use.
+_SUPPORTED_HASHES = ("sha512", "sha384", "sha256", "sha224", "sha1", "md5")
+
+
+@dataclass(frozen=True)
+class LinkHash:
+    """Links to content may have embedded hash values. This class parses those.
+
+    `name` must be any member of `_SUPPORTED_HASHES`.
+
+    This class can be converted to and from `ArchiveInfo`. While ArchiveInfo intends to
+    be JSON-serializable to conform to PEP 610, this class contains the logic for
+    parsing a hash name and value for correctness, and then checking whether that hash
+    conforms to a schema with `.is_hash_allowed()`."""
+
+    name: str
+    value: str
+
+    _hash_url_fragment_re = re.compile(
+        # NB: we do not validate that the second group (.*) is a valid hex
+        # digest. Instead, we simply keep that string in this class, and then check it
+        # against Hashes when hash-checking is needed. This is easier to debug than
+        # proactively discarding an invalid hex digest, as we handle incorrect hashes
+        # and malformed hashes in the same place.
+        r"[#&]({choices})=([^&]*)".format(
+            choices="|".join(re.escape(hash_name) for hash_name in _SUPPORTED_HASHES)
+        ),
+    )
+
+    def __post_init__(self) -> None:
+        assert self.name in _SUPPORTED_HASHES
+
+    @classmethod
+    def parse_pep658_hash(cls, dist_info_metadata: str) -> Optional["LinkHash"]:
+        """Parse a PEP 658 data-dist-info-metadata hash."""
+        if dist_info_metadata == "true":
+            return None
+        name, sep, value = dist_info_metadata.partition("=")
+        if not sep:
+            return None
+        if name not in _SUPPORTED_HASHES:
+            return None
+        return cls(name=name, value=value)
+
+    @classmethod
+    @functools.lru_cache(maxsize=None)
+    def find_hash_url_fragment(cls, url: str) -> Optional["LinkHash"]:
+        """Search a string for a checksum algorithm name and encoded output value."""
+        match = cls._hash_url_fragment_re.search(url)
+        if match is None:
+            return None
+        name, value = match.groups()
+        return cls(name=name, value=value)
+
+    def as_dict(self) -> Dict[str, str]:
+        return {self.name: self.value}
+
+    def as_hashes(self) -> Hashes:
+        """Return a Hashes instance which checks only for the current hash."""
+        return Hashes({self.name: [self.value]})
+
+    def is_hash_allowed(self, hashes: Optional[Hashes]) -> bool:
+        """
+        Return True if the current hash is allowed by `hashes`.
+        """
+        if hashes is None:
+            return False
+        return hashes.is_hash_allowed(self.name, hex_digest=self.value)
+
+
+def _clean_url_path_part(part: str) -> str:
+    """
+    Clean a "part" of a URL path (i.e. after splitting on "@" characters).
+    """
+    # We unquote prior to quoting to make sure nothing is double quoted.
+    return urllib.parse.quote(urllib.parse.unquote(part))
+
+
+def _clean_file_url_path(part: str) -> str:
+    """
+    Clean the first part of a URL path that corresponds to a local
+    filesystem path (i.e. the first part after splitting on "@" characters).
+    """
+    # We unquote prior to quoting to make sure nothing is double quoted.
+    # Also, on Windows the path part might contain a drive letter which
+    # should not be quoted. On Linux where drive letters do not
+    # exist, the colon should be quoted. We rely on urllib.request
+    # to do the right thing here.
+    return urllib.request.pathname2url(urllib.request.url2pathname(part))
+
+
+# percent-encoded:                   /
+_reserved_chars_re = re.compile("(@|%2F)", re.IGNORECASE)
+
+
+def _clean_url_path(path: str, is_local_path: bool) -> str:
+    """
+    Clean the path portion of a URL.
+    """
+    if is_local_path:
+        clean_func = _clean_file_url_path
+    else:
+        clean_func = _clean_url_path_part
+
+    # Split on the reserved characters prior to cleaning so that
+    # revision strings in VCS URLs are properly preserved.
+    parts = _reserved_chars_re.split(path)
+
+    cleaned_parts = []
+    for to_clean, reserved in pairwise(itertools.chain(parts, [""])):
+        cleaned_parts.append(clean_func(to_clean))
+        # Normalize %xx escapes (e.g. %2f -> %2F)
+        cleaned_parts.append(reserved.upper())
+
+    return "".join(cleaned_parts)
+
+
+def _ensure_quoted_url(url: str) -> str:
+    """
+    Make sure a link is fully quoted.
+    For example, if ' ' occurs in the URL, it will be replaced with "%20",
+    and without double-quoting other characters.
+    """
+    # Split the URL into parts according to the general structure
+    # `scheme://netloc/path;parameters?query#fragment`.
+    result = urllib.parse.urlparse(url)
+    # If the netloc is empty, then the URL refers to a local filesystem path.
+    is_local_path = not result.netloc
+    path = _clean_url_path(result.path, is_local_path=is_local_path)
+    return urllib.parse.urlunparse(result._replace(path=path))


 class Link(KeyBasedCompareMixin):
-    """Represents a parsed link from a Package Index's simple URL
-    """
+    """Represents a parsed link from a Package Index's simple URL"""

    __slots__ = [
        "_parsed_url",
        "_url",
+        "_hashes",
        "comes_from",
        "requires_python",
        "yanked_reason",
+        "dist_info_metadata",
        "cache_link_parsing",
+        "egg_fragment",
    ]

    def __init__(
        self,
        url: str,
-        comes_from: Optional[Union[str, "HTMLPage"]] = None,
+        comes_from: Optional[Union[str, "IndexContent"]] = None,
        requires_python: Optional[str] = None,
        yanked_reason: Optional[str] = None,
+        dist_info_metadata: Optional[str] = None,
        cache_link_parsing: bool = True,
+        hashes: Optional[Mapping[str, str]] = None,
    ) -> None:
        """
        :param url: url of the resource pointed to (href of the link)
-        :param comes_from: instance of HTMLPage where the link was found,
+        :param comes_from: instance of IndexContent where the link was found,
            or string.
        :param requires_python: String containing the `Requires-Python`
            metadata field, specified in PEP 345. This may be specified by
@@ -60,15 +208,20 @@ class Link(KeyBasedCompareMixin):
            a simple repository HTML link. If the file has been yanked but
            no reason was provided, this should be the empty string. See
            PEP 592 for more information and the specification.
+        :param dist_info_metadata: the metadata attached to the file, or None if no such
+            metadata is provided. This is the value of the "data-dist-info-metadata"
+            attribute, if present, in a simple repository HTML link. This may be parsed
+            into its own `Link` by `self.metadata_link()`. See PEP 658 for more
+            information and the specification.
        :param cache_link_parsing: A flag that is used elsewhere to determine
-                                   whether resources retrieved from this link
-                                   should be cached. PyPI index urls should
-                                   generally have this set to False, for
-                                   example.
+            whether resources retrieved from this link should be cached. PyPI
+            URLs should generally have this set to False, for example.
+        :param hashes: A mapping of hash names to digests to allow us to
+            determine the validity of a download.
        """

        # url can be a UNC windows share
-        if url.startswith('\\\\'):
+        if url.startswith("\\\\"):
            url = path_to_url(url)

        self._parsed_url = urllib.parse.urlsplit(url)
@@ -76,27 +229,99 @@ class Link(KeyBasedCompareMixin):
        # trying to set a new value.
        self._url = url

+        link_hash = LinkHash.find_hash_url_fragment(url)
+        hashes_from_link = {} if link_hash is None else link_hash.as_dict()
+        if hashes is None:
+            self._hashes = hashes_from_link
+        else:
+            self._hashes = {**hashes, **hashes_from_link}
+
        self.comes_from = comes_from
        self.requires_python = requires_python if requires_python else None
        self.yanked_reason = yanked_reason
+        self.dist_info_metadata = dist_info_metadata

        super().__init__(key=url, defining_class=Link)

        self.cache_link_parsing = cache_link_parsing
+        self.egg_fragment = self._egg_fragment()
+
+    @classmethod
+    def from_json(
+        cls,
+        file_data: Dict[str, Any],
+        page_url: str,
+    ) -> Optional["Link"]:
+        """
+        Convert an pypi json document from a simple repository page into a Link.
+        """
+        file_url = file_data.get("url")
+        if file_url is None:
+            return None
+
+        url = _ensure_quoted_url(urllib.parse.urljoin(page_url, file_url))
+        pyrequire = file_data.get("requires-python")
+        yanked_reason = file_data.get("yanked")
+        dist_info_metadata = file_data.get("dist-info-metadata")
+        hashes = file_data.get("hashes", {})
+
+        # The Link.yanked_reason expects an empty string instead of a boolean.
+        if yanked_reason and not isinstance(yanked_reason, str):
+            yanked_reason = ""
+        # The Link.yanked_reason expects None instead of False.
+        elif not yanked_reason:
+            yanked_reason = None
+
+        return cls(
+            url,
+            comes_from=page_url,
+            requires_python=pyrequire,
+            yanked_reason=yanked_reason,
+            hashes=hashes,
+            dist_info_metadata=dist_info_metadata,
+        )
+
+    @classmethod
+    def from_element(
+        cls,
+        anchor_attribs: Dict[str, Optional[str]],
+        page_url: str,
+        base_url: str,
+    ) -> Optional["Link"]:
+        """
+        Convert an anchor element's attributes in a simple repository page to a Link.
+        """
+        href = anchor_attribs.get("href")
+        if not href:
+            return None
+
+        url = _ensure_quoted_url(urllib.parse.urljoin(base_url, href))
+        pyrequire = anchor_attribs.get("data-requires-python")
+        yanked_reason = anchor_attribs.get("data-yanked")
+        dist_info_metadata = anchor_attribs.get("data-dist-info-metadata")
+
+        return cls(
+            url,
+            comes_from=page_url,
+            requires_python=pyrequire,
+            yanked_reason=yanked_reason,
+            dist_info_metadata=dist_info_metadata,
+        )

    def __str__(self) -> str:
        if self.requires_python:
-            rp = f' (requires-python:{self.requires_python})'
+            rp = f" (requires-python:{self.requires_python})"
        else:
-            rp = ''
+            rp = ""
        if self.comes_from:
-            return '{} (from {}){}'.format(
-                redact_auth_from_url(self._url), self.comes_from, rp)
+            return "{} (from {}){}".format(
+                redact_auth_from_url(self._url), self.comes_from, rp
+            )
        else:
            return redact_auth_from_url(str(self._url))

    def __repr__(self) -> str:
-        return f'<Link {self}>'
+        return f"<Link {self}>"

    @property
    def url(self) -> str:
@@ -104,7 +329,7 @@ class Link(KeyBasedCompareMixin):

    @property
    def filename(self) -> str:
-        path = self.path.rstrip('/')
+        path = self.path.rstrip("/")
        name = posixpath.basename(path)
        if not name:
            # Make sure we don't leak auth information if the netloc
@@ -113,7 +338,7 @@ class Link(KeyBasedCompareMixin):
            return netloc

        name = urllib.parse.unquote(name)
-        assert name, f'URL {self._url!r} produced no filename'
+        assert name, f"URL {self._url!r} produced no filename"
        return name

    @property
@@ -136,7 +361,7 @@ class Link(KeyBasedCompareMixin):
        return urllib.parse.unquote(self._parsed_url.path)

    def splitext(self) -> Tuple[str, str]:
-        return splitext(posixpath.basename(self.path.rstrip('/')))
+        return splitext(posixpath.basename(self.path.rstrip("/")))

    @property
    def ext(self) -> str:
@@ -145,18 +370,34 @@ class Link(KeyBasedCompareMixin):
    @property
    def url_without_fragment(self) -> str:
        scheme, netloc, path, query, fragment = self._parsed_url
-        return urllib.parse.urlunsplit((scheme, netloc, path, query, ''))
+        return urllib.parse.urlunsplit((scheme, netloc, path, query, ""))

-    _egg_fragment_re = re.compile(r'[#&]egg=([^&]*)')
+    _egg_fragment_re = re.compile(r"[#&]egg=([^&]*)")

-    @property
-    def egg_fragment(self) -> Optional[str]:
+    # Per PEP 508.
+    _project_name_re = re.compile(
+        r"^([A-Z0-9]|[A-Z0-9][A-Z0-9._-]*[A-Z0-9])$", re.IGNORECASE
+    )
+
+    def _egg_fragment(self) -> Optional[str]:
        match = self._egg_fragment_re.search(self._url)
        if not match:
            return None
-        return match.group(1)

-    _subdirectory_fragment_re = re.compile(r'[#&]subdirectory=([^&]*)')
+        # An egg fragment looks like a PEP 508 project name, along with
+        # an optional extras specifier. Anything else is invalid.
+        project_name = match.group(1)
+        if not self._project_name_re.match(project_name):
+            deprecated(
+                reason=f"{self} contains an egg fragment with a non-PEP 508 name",
+                replacement="to use the req @ url syntax, and remove the egg fragment",
+                gone_in="25.0",
+                issue=11617,
+            )
+
+        return project_name
+
+    _subdirectory_fragment_re = re.compile(r"[#&]subdirectory=([^&]*)")

    @property
    def subdirectory_fragment(self) -> Optional[str]:
@@ -165,31 +406,37 @@ class Link(KeyBasedCompareMixin):
            return None
        return match.group(1)

-    _hash_re = re.compile(
-        r'({choices})=([a-f0-9]+)'.format(choices="|".join(_SUPPORTED_HASHES))
-    )
+    def metadata_link(self) -> Optional["Link"]:
+        """Implementation of PEP 658 parsing."""
+        # Note that Link.from_element() parsing the "data-dist-info-metadata" attribute
+        # from an HTML anchor tag is typically how the Link.dist_info_metadata attribute
+        # gets set.
+        if self.dist_info_metadata is None:
+            return None
+        metadata_url = f"{self.url_without_fragment}.metadata"
+        metadata_link_hash = LinkHash.parse_pep658_hash(self.dist_info_metadata)
+        if metadata_link_hash is None:
+            return Link(metadata_url)
+        return Link(metadata_url, hashes=metadata_link_hash.as_dict())
+
+    def as_hashes(self) -> Hashes:
+        return Hashes({k: [v] for k, v in self._hashes.items()})

    @property
    def hash(self) -> Optional[str]:
-        match = self._hash_re.search(self._url)
-        if match:
-            return match.group(2)
-        return None
+        return next(iter(self._hashes.values()), None)

    @property
    def hash_name(self) -> Optional[str]:
-        match = self._hash_re.search(self._url)
-        if match:
-            return match.group(1)
-        return None
+        return next(iter(self._hashes), None)

    @property
    def show_url(self) -> str:
-        return posixpath.basename(self._url.split('#', 1)[0].split('?', 1)[0])
+        return posixpath.basename(self._url.split("#", 1)[0].split("?", 1)[0])

    @property
    def is_file(self) -> bool:
-        return self.scheme == 'file'
+        return self.scheme == "file"

    def is_existing_dir(self) -> bool:
        return self.is_file and os.path.isdir(self.file_path)
@@ -210,19 +457,15 @@ class Link(KeyBasedCompareMixin):

    @property
    def has_hash(self) -> bool:
-        return self.hash_name is not None
+        return bool(self._hashes)

    def is_hash_allowed(self, hashes: Optional[Hashes]) -> bool:
        """
-        Return True if the link has a hash and it is allowed.
+        Return True if the link has a hash and it is allowed by `hashes`.
        """
-        if hashes is None or not self.has_hash:
+        if hashes is None:
            return False
-        # Assert non-None so mypy knows self.hash_name and self.hash are str.
-        assert self.hash_name is not None
-        assert self.hash is not None
-
-        return hashes.is_hash_allowed(self.hash_name, hex_digest=self.hash)
+        return any(hashes.is_hash_allowed(k, v) for k, v in self._hashes.items())


 class _CleanResult(NamedTuple):
--- a/venv/Lib/site-packages/pip/_internal/models/scheme.py
+++ b/venv/Lib/site-packages/pip/_internal/models/scheme.py
@@ -6,7 +6,7 @@ https://docs.python.org/3/install/index.html#alternate-installation.
 """


-SCHEME_KEYS = ['platlib', 'purelib', 'headers', 'scripts', 'data']
+SCHEME_KEYS = ["platlib", "purelib", "headers", "scripts", "data"]


 class Scheme:
--- a/venv/Lib/site-packages/pip/_internal/models/search_scope.py
+++ b/venv/Lib/site-packages/pip/_internal/models/search_scope.py
@@ -20,13 +20,14 @@ class SearchScope:
    Encapsulates the locations that pip is configured to search.
    """

-    __slots__ = ["find_links", "index_urls"]
+    __slots__ = ["find_links", "index_urls", "no_index"]

    @classmethod
    def create(
        cls,
        find_links: List[str],
        index_urls: List[str],
+        no_index: bool,
    ) -> "SearchScope":
        """
        Create a SearchScope object after normalizing the `find_links`.
@@ -38,7 +39,7 @@ class SearchScope:
        # blindly normalize anything starting with a ~...
        built_find_links: List[str] = []
        for link in find_links:
-            if link.startswith('~'):
+            if link.startswith("~"):
                new_link = normalize_path(link)
                if os.path.exists(new_link):
                    link = new_link
@@ -49,33 +50,35 @@ class SearchScope:
        if not has_tls():
            for link in itertools.chain(index_urls, built_find_links):
                parsed = urllib.parse.urlparse(link)
-                if parsed.scheme == 'https':
+                if parsed.scheme == "https":
                    logger.warning(
-                        'pip is configured with locations that require '
-                        'TLS/SSL, however the ssl module in Python is not '
-                        'available.'
+                        "pip is configured with locations that require "
+                        "TLS/SSL, however the ssl module in Python is not "
+                        "available."
                    )
                    break

        return cls(
            find_links=built_find_links,
            index_urls=index_urls,
+            no_index=no_index,
        )

    def __init__(
        self,
        find_links: List[str],
        index_urls: List[str],
+        no_index: bool,
    ) -> None:
        self.find_links = find_links
        self.index_urls = index_urls
+        self.no_index = no_index

    def get_formatted_locations(self) -> str:
        lines = []
        redacted_index_urls = []
        if self.index_urls and self.index_urls != [PyPI.simple_url]:
            for url in self.index_urls:
-
                redacted_index_url = redact_auth_from_url(url)

                # Parse the URL
@@ -88,20 +91,23 @@ class SearchScope:
                # exceptions for malformed URLs
                if not purl.scheme and not purl.netloc:
                    logger.warning(
-                        'The index url "%s" seems invalid, '
-                        'please provide a scheme.', redacted_index_url)
+                        'The index url "%s" seems invalid, please provide a scheme.',
+                        redacted_index_url,
+                    )

                redacted_index_urls.append(redacted_index_url)

-            lines.append('Looking in indexes: {}'.format(
-                ', '.join(redacted_index_urls)))
+            lines.append(
+                "Looking in indexes: {}".format(", ".join(redacted_index_urls))
+            )

        if self.find_links:
            lines.append(
-                'Looking in links: {}'.format(', '.join(
-                    redact_auth_from_url(url) for url in self.find_links))
+                "Looking in links: {}".format(
+                    ", ".join(redact_auth_from_url(url) for url in self.find_links)
                )
-        return '\n'.join(lines)
+            )
+        return "\n".join(lines)

    def get_index_urls_locations(self, project_name: str) -> List[str]:
        """Returns the locations found via self.index_urls
@@ -112,15 +118,15 @@ class SearchScope:

        def mkurl_pypi_url(url: str) -> str:
            loc = posixpath.join(
-                url,
-                urllib.parse.quote(canonicalize_name(project_name)))
+                url, urllib.parse.quote(canonicalize_name(project_name))
+            )
            # For maximum compatibility with easy_install, ensure the path
            # ends in a trailing slash.  Although this isn't in the spec
            # (and PyPI can handle it without the slash) some other index
            # implementations might break if they relied on easy_install's
            # behavior.
-            if not loc.endswith('/'):
-                loc = loc + '/'
+            if not loc.endswith("/"):
+                loc = loc + "/"
            return loc

        return [mkurl_pypi_url(url) for url in self.index_urls]
--- a/venv/Lib/site-packages/pip/_internal/models/selection_prefs.py
+++ b/venv/Lib/site-packages/pip/_internal/models/selection_prefs.py
@@ -9,8 +9,13 @@ class SelectionPreferences:
    and installing files.
    """

-    __slots__ = ['allow_yanked', 'allow_all_prereleases', 'format_control',
-                 'prefer_binary', 'ignore_requires_python']
+    __slots__ = [
+        "allow_yanked",
+        "allow_all_prereleases",
+        "format_control",
+        "prefer_binary",
+        "ignore_requires_python",
+    ]

    # Don't include an allow_yanked default value to make sure each call
    # site considers whether yanked releases are allowed. This also causes
--- a/venv/Lib/site-packages/pip/_internal/models/target_python.py
+++ b/venv/Lib/site-packages/pip/_internal/models/target_python.py
@@ -53,7 +53,7 @@ class TargetPython:
        else:
            py_version_info = normalize_version_info(py_version_info)

-        py_version = '.'.join(map(str, py_version_info[:2]))
+        py_version = ".".join(map(str, py_version_info[:2]))

        self.abis = abis
        self.implementation = implementation
@@ -70,19 +70,18 @@ class TargetPython:
        """
        display_version = None
        if self._given_py_version_info is not None:
-            display_version = '.'.join(
+            display_version = ".".join(
                str(part) for part in self._given_py_version_info
            )

        key_values = [
-            ('platforms', self.platforms),
-            ('version_info', display_version),
-            ('abis', self.abis),
-            ('implementation', self.implementation),
+            ("platforms", self.platforms),
+            ("version_info", display_version),
+            ("abis", self.abis),
+            ("implementation", self.implementation),
        ]
-        return ' '.join(
-            f'{key}={value!r}' for key, value in key_values
-            if value is not None
+        return " ".join(
+            f"{key}={value!r}" for key, value in key_values if value is not None
        )

    def get_tags(self) -> List[Tag]:
--- a/venv/Lib/site-packages/pip/_internal/models/wheel.py
+++ b/venv/Lib/site-packages/pip/_internal/models/wheel.py
@@ -13,10 +13,10 @@ class Wheel:
    """A wheel file"""

    wheel_file_re = re.compile(
-        r"""^(?P<namever>(?P<name>.+?)-(?P<ver>.*?))
-        ((-(?P<build>\d[^-]*?))?-(?P<pyver>.+?)-(?P<abi>.+?)-(?P<plat>.+?)
+        r"""^(?P<namever>(?P<name>[^\s-]+?)-(?P<ver>[^\s-]*?))
+        ((-(?P<build>\d[^-]*?))?-(?P<pyver>[^\s-]+?)-(?P<abi>[^\s-]+?)-(?P<plat>[^\s-]+?)
        \.whl|\.dist-info)$""",
-        re.VERBOSE
+        re.VERBOSE,
    )

    def __init__(self, filename: str) -> None:
@@ -25,23 +25,20 @@ class Wheel:
        """
        wheel_info = self.wheel_file_re.match(filename)
        if not wheel_info:
-            raise InvalidWheelFilename(
-                f"{filename} is not a valid wheel filename."
-            )
+            raise InvalidWheelFilename(f"{filename} is not a valid wheel filename.")
        self.filename = filename
-        self.name = wheel_info.group('name').replace('_', '-')
+        self.name = wheel_info.group("name").replace("_", "-")
        # we'll assume "_" means "-" due to wheel naming scheme
        # (https://github.com/pypa/pip/issues/1150)
-        self.version = wheel_info.group('ver').replace('_', '-')
-        self.build_tag = wheel_info.group('build')
-        self.pyversions = wheel_info.group('pyver').split('.')
-        self.abis = wheel_info.group('abi').split('.')
-        self.plats = wheel_info.group('plat').split('.')
+        self.version = wheel_info.group("ver").replace("_", "-")
+        self.build_tag = wheel_info.group("build")
+        self.pyversions = wheel_info.group("pyver").split(".")
+        self.abis = wheel_info.group("abi").split(".")
+        self.plats = wheel_info.group("plat").split(".")

        # All the tag combinations from this file
        self.file_tags = {
-            Tag(x, y, z) for x in self.pyversions
-            for y in self.abis for z in self.plats
+            Tag(x, y, z) for x in self.pyversions for y in self.abis for z in self.plats
        }

    def get_formatted_file_tags(self) -> List[str]:
@@ -61,7 +58,10 @@ class Wheel:
        :raises ValueError: If none of the wheel's file tags match one of
            the supported tags.
        """
-        return min(tags.index(tag) for tag in self.file_tags if tag in tags)
+        try:
+            return next(i for i, t in enumerate(tags) if t in self.file_tags)
+        except StopIteration:
+            raise ValueError()

    def find_most_preferred_tag(
        self, tags: List[Tag], tag_to_priority: Dict[Tag, int]
--- a/venv/Lib/site-packages/pip/_internal/network/auth.py
+++ b/venv/Lib/site-packages/pip/_internal/network/auth.py
@@ -3,9 +3,18 @@
 Contains interface (MultiDomainBasicAuth) and associated glue code for
 providing credentials in the context of network requests.
 """
-
+import logging
+import os
+import shutil
+import subprocess
+import sysconfig
+import typing
 import urllib.parse
-from typing import Any, Dict, List, Optional, Tuple
+from abc import ABC, abstractmethod
+from functools import lru_cache
+from os.path import commonprefix
+from pathlib import Path
+from typing import Any, Dict, List, NamedTuple, Optional, Tuple

 from pip._vendor.requests.auth import AuthBase, HTTPBasicAuth
 from pip._vendor.requests.models import Request, Response
@@ -23,59 +32,204 @@ from pip._internal.vcs.versioncontrol import AuthInfo

 logger = getLogger(__name__)

-Credentials = Tuple[str, str, str]
-
-try:
-    import keyring
-except ImportError:
-    keyring = None
-except Exception as exc:
-    logger.warning(
-        "Keyring is skipped due to an exception: %s",
-        str(exc),
-    )
-    keyring = None
+KEYRING_DISABLED = False


-def get_keyring_auth(url: Optional[str], username: Optional[str]) -> Optional[AuthInfo]:
-    """Return the tuple auth for a given url from keyring."""
-    global keyring
-    if not url or not keyring:
+class Credentials(NamedTuple):
+    url: str
+    username: str
+    password: str
+
+
+class KeyRingBaseProvider(ABC):
+    """Keyring base provider interface"""
+
+    has_keyring: bool
+
+    @abstractmethod
+    def get_auth_info(self, url: str, username: Optional[str]) -> Optional[AuthInfo]:
+        ...
+
+    @abstractmethod
+    def save_auth_info(self, url: str, username: str, password: str) -> None:
+        ...
+
+
+class KeyRingNullProvider(KeyRingBaseProvider):
+    """Keyring null provider"""
+
+    has_keyring = False
+
+    def get_auth_info(self, url: str, username: Optional[str]) -> Optional[AuthInfo]:
        return None

-    try:
-        try:
-            get_credential = keyring.get_credential
-        except AttributeError:
-            pass
-        else:
+    def save_auth_info(self, url: str, username: str, password: str) -> None:
+        return None
+
+
+class KeyRingPythonProvider(KeyRingBaseProvider):
+    """Keyring interface which uses locally imported `keyring`"""
+
+    has_keyring = True
+
+    def __init__(self) -> None:
+        import keyring
+
+        self.keyring = keyring
+
+    def get_auth_info(self, url: str, username: Optional[str]) -> Optional[AuthInfo]:
+        # Support keyring's get_credential interface which supports getting
+        # credentials without a username. This is only available for
+        # keyring>=15.2.0.
+        if hasattr(self.keyring, "get_credential"):
            logger.debug("Getting credentials from keyring for %s", url)
-            cred = get_credential(url, username)
+            cred = self.keyring.get_credential(url, username)
            if cred is not None:
                return cred.username, cred.password
            return None

-        if username:
+        if username is not None:
            logger.debug("Getting password from keyring for %s", url)
-            password = keyring.get_password(url, username)
+            password = self.keyring.get_password(url, username)
            if password:
                return username, password
-
-    except Exception as exc:
-        logger.warning(
-            "Keyring is skipped due to an exception: %s",
-            str(exc),
-        )
-        keyring = None
        return None

+    def save_auth_info(self, url: str, username: str, password: str) -> None:
+        self.keyring.set_password(url, username, password)
+
+
+class KeyRingCliProvider(KeyRingBaseProvider):
+    """Provider which uses `keyring` cli
+
+    Instead of calling the keyring package installed alongside pip
+    we call keyring on the command line which will enable pip to
+    use which ever installation of keyring is available first in
+    PATH.
+    """
+
+    has_keyring = True
+
+    def __init__(self, cmd: str) -> None:
+        self.keyring = cmd
+
+    def get_auth_info(self, url: str, username: Optional[str]) -> Optional[AuthInfo]:
+        # This is the default implementation of keyring.get_credential
+        # https://github.com/jaraco/keyring/blob/97689324abcf01bd1793d49063e7ca01e03d7d07/keyring/backend.py#L134-L139
+        if username is not None:
+            password = self._get_password(url, username)
+            if password is not None:
+                return username, password
+        return None
+
+    def save_auth_info(self, url: str, username: str, password: str) -> None:
+        return self._set_password(url, username, password)
+
+    def _get_password(self, service_name: str, username: str) -> Optional[str]:
+        """Mirror the implementation of keyring.get_password using cli"""
+        if self.keyring is None:
+            return None
+
+        cmd = [self.keyring, "get", service_name, username]
+        env = os.environ.copy()
+        env["PYTHONIOENCODING"] = "utf-8"
+        res = subprocess.run(
+            cmd,
+            stdin=subprocess.DEVNULL,
+            stdout=subprocess.PIPE,
+            env=env,
+        )
+        if res.returncode:
+            return None
+        return res.stdout.decode("utf-8").strip(os.linesep)
+
+    def _set_password(self, service_name: str, username: str, password: str) -> None:
+        """Mirror the implementation of keyring.set_password using cli"""
+        if self.keyring is None:
+            return None
+        env = os.environ.copy()
+        env["PYTHONIOENCODING"] = "utf-8"
+        subprocess.run(
+            [self.keyring, "set", service_name, username],
+            input=f"{password}{os.linesep}".encode("utf-8"),
+            env=env,
+            check=True,
+        )
+        return None
+
+
+@lru_cache(maxsize=None)
+def get_keyring_provider(provider: str) -> KeyRingBaseProvider:
+    logger.verbose("Keyring provider requested: %s", provider)
+
+    # keyring has previously failed and been disabled
+    if KEYRING_DISABLED:
+        provider = "disabled"
+    if provider in ["import", "auto"]:
+        try:
+            impl = KeyRingPythonProvider()
+            logger.verbose("Keyring provider set: import")
+            return impl
+        except ImportError:
+            pass
+        except Exception as exc:
+            # In the event of an unexpected exception
+            # we should warn the user
+            msg = "Installed copy of keyring fails with exception %s"
+            if provider == "auto":
+                msg = msg + ", trying to find a keyring executable as a fallback"
+            logger.warning(msg, exc, exc_info=logger.isEnabledFor(logging.DEBUG))
+    if provider in ["subprocess", "auto"]:
+        cli = shutil.which("keyring")
+        if cli and cli.startswith(sysconfig.get_path("scripts")):
+            # all code within this function is stolen from shutil.which implementation
+            @typing.no_type_check
+            def PATH_as_shutil_which_determines_it() -> str:
+                path = os.environ.get("PATH", None)
+                if path is None:
+                    try:
+                        path = os.confstr("CS_PATH")
+                    except (AttributeError, ValueError):
+                        # os.confstr() or CS_PATH is not available
+                        path = os.defpath
+                # bpo-35755: Don't use os.defpath if the PATH environment variable is
+                # set to an empty string
+
+                return path
+
+            scripts = Path(sysconfig.get_path("scripts"))
+
+            paths = []
+            for path in PATH_as_shutil_which_determines_it().split(os.pathsep):
+                p = Path(path)
+                try:
+                    if not p.samefile(scripts):
+                        paths.append(path)
+                except FileNotFoundError:
+                    pass
+
+            path = os.pathsep.join(paths)
+
+            cli = shutil.which("keyring", path=path)
+
+        if cli:
+            logger.verbose("Keyring provider set: subprocess with executable %s", cli)
+            return KeyRingCliProvider(cli)
+
+    logger.verbose("Keyring provider set: disabled")
+    return KeyRingNullProvider()
+

 class MultiDomainBasicAuth(AuthBase):
    def __init__(
-        self, prompting: bool = True, index_urls: Optional[List[str]] = None
+        self,
+        prompting: bool = True,
+        index_urls: Optional[List[str]] = None,
+        keyring_provider: str = "auto",
    ) -> None:
        self.prompting = prompting
        self.index_urls = index_urls
+        self.keyring_provider = keyring_provider  # type: ignore[assignment]
        self.passwords: Dict[str, AuthInfo] = {}
        # When the user is prompted to enter credentials and keyring is
        # available, we will offer to save them. If the user accepts,
@@ -84,6 +238,47 @@ class MultiDomainBasicAuth(AuthBase):
        # ``save_credentials`` to save these.
        self._credentials_to_save: Optional[Credentials] = None

+    @property
+    def keyring_provider(self) -> KeyRingBaseProvider:
+        return get_keyring_provider(self._keyring_provider)
+
+    @keyring_provider.setter
+    def keyring_provider(self, provider: str) -> None:
+        # The free function get_keyring_provider has been decorated with
+        # functools.cache. If an exception occurs in get_keyring_auth that
+        # cache will be cleared and keyring disabled, take that into account
+        # if you want to remove this indirection.
+        self._keyring_provider = provider
+
+    @property
+    def use_keyring(self) -> bool:
+        # We won't use keyring when --no-input is passed unless
+        # a specific provider is requested because it might require
+        # user interaction
+        return self.prompting or self._keyring_provider not in ["auto", "disabled"]
+
+    def _get_keyring_auth(
+        self,
+        url: Optional[str],
+        username: Optional[str],
+    ) -> Optional[AuthInfo]:
+        """Return the tuple auth for a given url from keyring."""
+        # Do nothing if no url was provided
+        if not url:
+            return None
+
+        try:
+            return self.keyring_provider.get_auth_info(url, username)
+        except Exception as exc:
+            logger.warning(
+                "Keyring is skipped due to an exception: %s",
+                str(exc),
+            )
+            global KEYRING_DISABLED
+            KEYRING_DISABLED = True
+            get_keyring_provider.cache_clear()
+            return None
+
    def _get_index_url(self, url: str) -> Optional[str]:
        """Return the original index URL matching the requested URL.

@@ -100,15 +295,42 @@ class MultiDomainBasicAuth(AuthBase):
        if not url or not self.index_urls:
            return None

-        for u in self.index_urls:
-            prefix = remove_auth_from_url(u).rstrip("/") + "/"
-            if url.startswith(prefix):
-                return u
+        url = remove_auth_from_url(url).rstrip("/") + "/"
+        parsed_url = urllib.parse.urlsplit(url)
+
+        candidates = []
+
+        for index in self.index_urls:
+            index = index.rstrip("/") + "/"
+            parsed_index = urllib.parse.urlsplit(remove_auth_from_url(index))
+            if parsed_url == parsed_index:
+                return index
+
+            if parsed_url.netloc != parsed_index.netloc:
+                continue
+
+            candidate = urllib.parse.urlsplit(index)
+            candidates.append(candidate)
+
+        if not candidates:
            return None

+        candidates.sort(
+            reverse=True,
+            key=lambda candidate: commonprefix(
+                [
+                    parsed_url.path,
+                    candidate.path,
+                ]
+            ).rfind("/"),
+        )
+
+        return urllib.parse.urlunsplit(candidates[0])
+
    def _get_new_credentials(
        self,
        original_url: str,
+        *,
        allow_netrc: bool = True,
        allow_keyring: bool = False,
    ) -> AuthInfo:
@@ -152,8 +374,8 @@ class MultiDomainBasicAuth(AuthBase):
            # The index url is more specific than the netloc, so try it first
            # fmt: off
            kr_auth = (
-                get_keyring_auth(index_url, username) or
-                get_keyring_auth(netloc, username)
+                self._get_keyring_auth(index_url, username) or
+                self._get_keyring_auth(netloc, username)
            )
            # fmt: on
            if kr_auth:
@@ -179,9 +401,16 @@ class MultiDomainBasicAuth(AuthBase):
        # Try to get credentials from original url
        username, password = self._get_new_credentials(original_url)

-        # If credentials not found, use any stored credentials for this netloc
-        if username is None and password is None:
-            username, password = self.passwords.get(netloc, (None, None))
+        # If credentials not found, use any stored credentials for this netloc.
+        # Do this if either the username or the password is missing.
+        # This accounts for the situation in which the user has specified
+        # the username in the index url, but the password comes from keyring.
+        if (username is None or password is None) and netloc in self.passwords:
+            un, pw = self.passwords[netloc]
+            # It is possible that the cached credentials are for a different username,
+            # in which case the cache should be ignored.
+            if username is None or username == un:
+                username, password = un, pw

        if username is not None or password is not None:
            # Convert the username and password if they're None, so that
@@ -223,10 +452,11 @@ class MultiDomainBasicAuth(AuthBase):
    def _prompt_for_password(
        self, netloc: str
    ) -> Tuple[Optional[str], Optional[str], bool]:
-        username = ask_input(f"User for {netloc}: ")
+        username = ask_input(f"User for {netloc}: ") if self.prompting else None
        if not username:
            return None, None, False
-        auth = get_keyring_auth(netloc, username)
+        if self.use_keyring:
+            auth = self._get_keyring_auth(netloc, username)
            if auth and auth[0] is not None and auth[1] is not None:
                return auth[0], auth[1], False
        password = ask_password("Password: ")
@@ -234,7 +464,11 @@ class MultiDomainBasicAuth(AuthBase):

    # Factored out to allow for easy patching in tests
    def _should_save_password_to_keyring(self) -> bool:
-        if not keyring:
+        if (
+            not self.prompting
+            or not self.use_keyring
+            or not self.keyring_provider.has_keyring
+        ):
            return False
        return ask("Save credentials to keyring [y/N]: ", ["y", "n"]) == "y"

@@ -244,19 +478,22 @@ class MultiDomainBasicAuth(AuthBase):
        if resp.status_code != 401:
            return resp

-        # We are not able to prompt the user so simply return the response
-        if not self.prompting:
-            return resp
-
-        parsed = urllib.parse.urlparse(resp.url)
+        username, password = None, None

        # Query the keyring for credentials:
+        if self.use_keyring:
            username, password = self._get_new_credentials(
                resp.url,
                allow_netrc=False,
                allow_keyring=True,
            )

+        # We are not able to prompt the user so simply return the response
+        if not self.prompting and not username and not password:
+            return resp
+
+        parsed = urllib.parse.urlparse(resp.url)
+
        # Prompt the user for a new username and password
        save = False
        if not username and not password:
@@ -269,7 +506,11 @@ class MultiDomainBasicAuth(AuthBase):

            # Prompt to save the password to keyring
            if save and self._should_save_password_to_keyring():
-                self._credentials_to_save = (parsed.netloc, username, password)
+                self._credentials_to_save = Credentials(
+                    url=parsed.netloc,
+                    username=username,
+                    password=password,
+                )

        # Consume content and release the original connection to allow our new
        #   request to reuse the same one.
@@ -302,15 +543,17 @@ class MultiDomainBasicAuth(AuthBase):

    def save_credentials(self, resp: Response, **kwargs: Any) -> None:
        """Response callback to save credentials on success."""
-        assert keyring is not None, "should never reach here without keyring"
-        if not keyring:
-            return
+        assert (
+            self.keyring_provider.has_keyring
+        ), "should never reach here without keyring"

        creds = self._credentials_to_save
        self._credentials_to_save = None
        if creds and resp.status_code < 400:
            try:
                logger.info("Saving credentials to keyring")
-                keyring.set_password(*creds)
+                self.keyring_provider.save_auth_info(
+                    creds.url, creds.username, creds.password
+                )
            except Exception:
                logger.exception("Failed to save credentials")
--- a/venv/Lib/site-packages/pip/_internal/network/cache.py
+++ b/venv/Lib/site-packages/pip/_internal/network/cache.py
@@ -3,7 +3,7 @@

 import os
 from contextlib import contextmanager
-from typing import Iterator, Optional
+from typing import Generator, Optional

 from pip._vendor.cachecontrol.cache import BaseCache
 from pip._vendor.cachecontrol.caches import FileCache
@@ -18,7 +18,7 @@ def is_from_cache(response: Response) -> bool:


@contextmanager
-def suppressed_cache_errors() -> Iterator[None]:
+def suppressed_cache_errors() -> Generator[None, None, None]:
    """If we can't access the cache then we can just skip caching and process
    requests as if caching wasn't enabled.
    """
@@ -53,7 +53,7 @@ class SafeFileCache(BaseCache):
            with open(path, "rb") as f:
                return f.read()

-    def set(self, key: str, value: bytes) -> None:
+    def set(self, key: str, value: bytes, expires: Optional[int] = None) -> None:
        path = self._get_cache_path(key)
        with suppressed_cache_errors():
            ensure_dir(os.path.dirname(path))
--- a/venv/Lib/site-packages/pip/_internal/network/download.py
+++ b/venv/Lib/site-packages/pip/_internal/network/download.py
@@ -1,6 +1,6 @@
 """Download files with progress indicators.
 """
-import cgi
+import email.message
 import logging
 import mimetypes
 import os
@@ -8,7 +8,7 @@ from typing import Iterable, Optional, Tuple

 from pip._vendor.requests.models import CONTENT_CHUNK_SIZE, Response

-from pip._internal.cli.progress_bars import DownloadProgressProvider
+from pip._internal.cli.progress_bars import get_download_progress_renderer
 from pip._internal.exceptions import NetworkConnectionError
 from pip._internal.models.index import PyPI
 from pip._internal.models.link import Link
@@ -65,7 +65,8 @@ def _prepare_download(
    if not show_progress:
        return chunks

-    return DownloadProgressProvider(progress_bar, max=total_length)(chunks)
+    renderer = get_download_progress_renderer(bar_type=progress_bar, size=total_length)
+    return renderer(chunks)


 def sanitize_content_filename(filename: str) -> str:
@@ -80,12 +81,13 @@ def parse_content_disposition(content_disposition: str, default_filename: str) -
    Parse the "filename" value from a Content-Disposition header, and
    return the default filename if the result is empty.
    """
-    _type, params = cgi.parse_header(content_disposition)
-    filename = params.get("filename")
+    m = email.message.Message()
+    m["content-type"] = content_disposition
+    filename = m.get_param("filename")
    if filename:
        # We need to sanitize the filename to prevent directory traversal
        # in case the filename contains ".." path parts.
-        filename = sanitize_content_filename(filename)
+        filename = sanitize_content_filename(str(filename))
    return filename or default_filename


--- a/venv/Lib/site-packages/pip/_internal/network/lazy_wheel.py
+++ b/venv/Lib/site-packages/pip/_internal/network/lazy_wheel.py
@@ -5,36 +5,36 @@ __all__ = ["HTTPRangeRequestUnsupported", "dist_from_wheel_url"]
 from bisect import bisect_left, bisect_right
 from contextlib import contextmanager
 from tempfile import NamedTemporaryFile
-from typing import Any, Dict, Iterator, List, Optional, Tuple
-from zipfile import BadZipfile, ZipFile
+from typing import Any, Dict, Generator, List, Optional, Tuple
+from zipfile import BadZipFile, ZipFile

-from pip._vendor.pkg_resources import Distribution
+from pip._vendor.packaging.utils import canonicalize_name
 from pip._vendor.requests.models import CONTENT_CHUNK_SIZE, Response

+from pip._internal.metadata import BaseDistribution, MemoryWheel, get_wheel_distribution
 from pip._internal.network.session import PipSession
 from pip._internal.network.utils import HEADERS, raise_for_status, response_chunks
-from pip._internal.utils.wheel import pkg_resources_distribution_for_wheel


 class HTTPRangeRequestUnsupported(Exception):
    pass


-def dist_from_wheel_url(name: str, url: str, session: PipSession) -> Distribution:
-    """Return a pkg_resources.Distribution from the given wheel URL.
+def dist_from_wheel_url(name: str, url: str, session: PipSession) -> BaseDistribution:
+    """Return a distribution object from the given wheel URL.

-    This uses HTTP range requests to only fetch the potion of the wheel
+    This uses HTTP range requests to only fetch the portion of the wheel
    containing metadata, just enough for the object to be constructed.
    If such requests are not supported, HTTPRangeRequestUnsupported
    is raised.
    """
-    with LazyZipOverHTTP(url, session) as wheel:
+    with LazyZipOverHTTP(url, session) as zf:
        # For read-only ZIP files, ZipFile only needs methods read,
        # seek, seekable and tell, not the whole IO protocol.
-        zip_file = ZipFile(wheel)  # type: ignore
+        wheel = MemoryWheel(zf.name, zf)  # type: ignore
        # After context manager exit, wheel.name
        # is an invalid file by intention.
-        return pkg_resources_distribution_for_wheel(zip_file, name, wheel.name)
+        return get_wheel_distribution(wheel, canonicalize_name(name))


 class LazyZipOverHTTP:
@@ -135,11 +135,11 @@ class LazyZipOverHTTP:
        self._file.__enter__()
        return self

-    def __exit__(self, *exc: Any) -> Optional[bool]:
-        return self._file.__exit__(*exc)
+    def __exit__(self, *exc: Any) -> None:
+        self._file.__exit__(*exc)

    @contextmanager
-    def _stay(self) -> Iterator[None]:
+    def _stay(self) -> Generator[None, None, None]:
        """Return a context manager keeping the position.

        At the end of the block, seek back to original position.
@@ -160,7 +160,7 @@ class LazyZipOverHTTP:
                    # For read-only ZIP files, ZipFile only needs
                    # methods read, seek, seekable and tell.
                    ZipFile(self)  # type: ignore
-                except BadZipfile:
+                except BadZipFile:
                    pass
                else:
                    break
@@ -177,8 +177,8 @@ class LazyZipOverHTTP:

    def _merge(
        self, start: int, end: int, left: int, right: int
-    ) -> Iterator[Tuple[int, int]]:
-        """Return an iterator of intervals to be fetched.
+    ) -> Generator[Tuple[int, int], None, None]:
+        """Return a generator of intervals to be fetched.

        Args:
            start (int): Start of needed interval
--- a/venv/Lib/site-packages/pip/_internal/network/session.py
+++ b/venv/Lib/site-packages/pip/_internal/network/session.py
@@ -2,17 +2,8 @@
 network request configuration and behavior.
 """

-# When mypy runs on Windows the call to distro.linux_distribution() is skipped
-# resulting in the failure:
-#
-#     error: unused 'type: ignore' comment
-#
-# If the upstream module adds typing, this comment should be removed. See
-# https://github.com/nir0s/distro/pull/269
-#
-# mypy: warn-unused-ignores=False
-
 import email.utils
+import io
 import ipaddress
 import json
 import logging
@@ -24,11 +15,23 @@ import subprocess
 import sys
 import urllib.parse
 import warnings
-from typing import Any, Dict, Iterator, List, Mapping, Optional, Sequence, Tuple, Union
+from typing import (
+    TYPE_CHECKING,
+    Any,
+    Dict,
+    Generator,
+    List,
+    Mapping,
+    Optional,
+    Sequence,
+    Tuple,
+    Union,
+)

 from pip._vendor import requests, urllib3
-from pip._vendor.cachecontrol import CacheControlAdapter
-from pip._vendor.requests.adapters import BaseAdapter, HTTPAdapter
+from pip._vendor.cachecontrol import CacheControlAdapter as _BaseCacheControlAdapter
+from pip._vendor.requests.adapters import DEFAULT_POOLBLOCK, BaseAdapter
+from pip._vendor.requests.adapters import HTTPAdapter as _BaseHTTPAdapter
 from pip._vendor.requests.models import PreparedRequest, Response
 from pip._vendor.requests.structures import CaseInsensitiveDict
 from pip._vendor.urllib3.connectionpool import ConnectionPool
@@ -46,6 +49,12 @@ from pip._internal.utils.glibc import libc_ver
 from pip._internal.utils.misc import build_url_from_netloc, parse_netloc
 from pip._internal.utils.urls import url_to_path

+if TYPE_CHECKING:
+    from ssl import SSLContext
+
+    from pip._vendor.urllib3.poolmanager import PoolManager
+
+
 logger = logging.getLogger(__name__)

 SecureOrigin = Tuple[str, str, Optional[Union[int, str]]]
@@ -128,9 +137,8 @@ def user_agent() -> str:
    if sys.platform.startswith("linux"):
        from pip._vendor import distro

-        # https://github.com/nir0s/distro/pull/269
-        linux_distribution = distro.linux_distribution()  # type: ignore
-        distro_infos = dict(
+        linux_distribution = distro.name(), distro.version(), distro.codename()
+        distro_infos: Dict[str, Any] = dict(
            filter(
                lambda x: x[1],
                zip(["name", "version", "id"], linux_distribution),
@@ -218,8 +226,11 @@ class LocalFSAdapter(BaseAdapter):
        try:
            stats = os.stat(pathname)
        except OSError as exc:
+            # format the exception raised as a io.BytesIO object,
+            # to return a better error message:
            resp.status_code = 404
-            resp.raw = exc
+            resp.reason = type(exc).__name__
+            resp.raw = io.BytesIO(f"{resp.reason}: {exc}".encode("utf8"))
        else:
            modified = email.utils.formatdate(stats.st_mtime, usegmt=True)
            content_type = mimetypes.guess_type(pathname)[0] or "text/plain"
@@ -240,6 +251,48 @@ class LocalFSAdapter(BaseAdapter):
        pass


+class _SSLContextAdapterMixin:
+    """Mixin to add the ``ssl_context`` constructor argument to HTTP adapters.
+
+    The additional argument is forwarded directly to the pool manager. This allows us
+    to dynamically decide what SSL store to use at runtime, which is used to implement
+    the optional ``truststore`` backend.
+    """
+
+    def __init__(
+        self,
+        *,
+        ssl_context: Optional["SSLContext"] = None,
+        **kwargs: Any,
+    ) -> None:
+        self._ssl_context = ssl_context
+        super().__init__(**kwargs)
+
+    def init_poolmanager(
+        self,
+        connections: int,
+        maxsize: int,
+        block: bool = DEFAULT_POOLBLOCK,
+        **pool_kwargs: Any,
+    ) -> "PoolManager":
+        if self._ssl_context is not None:
+            pool_kwargs.setdefault("ssl_context", self._ssl_context)
+        return super().init_poolmanager(  # type: ignore[misc]
+            connections=connections,
+            maxsize=maxsize,
+            block=block,
+            **pool_kwargs,
+        )
+
+
+class HTTPAdapter(_SSLContextAdapterMixin, _BaseHTTPAdapter):
+    pass
+
+
+class CacheControlAdapter(_SSLContextAdapterMixin, _BaseCacheControlAdapter):
+    pass
+
+
 class InsecureHTTPAdapter(HTTPAdapter):
    def cert_verify(
        self,
@@ -263,7 +316,6 @@ class InsecureCacheControlAdapter(CacheControlAdapter):


 class PipSession(requests.Session):
-
    timeout: Optional[int] = None

    def __init__(
@@ -273,6 +325,7 @@ class PipSession(requests.Session):
        cache: Optional[str] = None,
        trusted_hosts: Sequence[str] = (),
        index_urls: Optional[List[str]] = None,
+        ssl_context: Optional["SSLContext"] = None,
        **kwargs: Any,
    ) -> None:
        """
@@ -325,13 +378,14 @@ class PipSession(requests.Session):
            secure_adapter = CacheControlAdapter(
                cache=SafeFileCache(cache),
                max_retries=retries,
+                ssl_context=ssl_context,
            )
            self._trusted_host_adapter = InsecureCacheControlAdapter(
                cache=SafeFileCache(cache),
                max_retries=retries,
            )
        else:
-            secure_adapter = HTTPAdapter(max_retries=retries)
+            secure_adapter = HTTPAdapter(max_retries=retries, ssl_context=ssl_context)
            self._trusted_host_adapter = insecure_adapter

        self.mount("https://", secure_adapter)
@@ -369,12 +423,19 @@ class PipSession(requests.Session):
        if host_port not in self.pip_trusted_origins:
            self.pip_trusted_origins.append(host_port)

+        self.mount(
+            build_url_from_netloc(host, scheme="http") + "/", self._trusted_host_adapter
+        )
        self.mount(build_url_from_netloc(host) + "/", self._trusted_host_adapter)
        if not host_port[1]:
+            self.mount(
+                build_url_from_netloc(host, scheme="http") + ":",
+                self._trusted_host_adapter,
+            )
            # Mount wildcard ports for the same host.
            self.mount(build_url_from_netloc(host) + ":", self._trusted_host_adapter)

-    def iter_secure_origins(self) -> Iterator[SecureOrigin]:
+    def iter_secure_origins(self) -> Generator[SecureOrigin, None, None]:
        yield from SECURE_ORIGINS
        for host, port in self.pip_trusted_origins:
            yield ("*", host, "*" if port is None else port)
@@ -403,7 +464,7 @@ class PipSession(requests.Session):
                continue

            try:
-                addr = ipaddress.ip_address(origin_host)
+                addr = ipaddress.ip_address(origin_host or "")
                network = ipaddress.ip_network(secure_host)
            except ValueError:
                # We don't have both a valid address or a valid network, so
@@ -449,6 +510,8 @@ class PipSession(requests.Session):
    def request(self, method: str, url: str, *args: Any, **kwargs: Any) -> Response:
        # Allow setting a default timeout on a session
        kwargs.setdefault("timeout", self.timeout)
+        # Allow setting a default proxies on a session
+        kwargs.setdefault("proxies", self.proxies)

        # Dispatch the actual request
        return super().request(method, url, *args, **kwargs)
--- a/venv/Lib/site-packages/pip/_internal/network/utils.py
+++ b/venv/Lib/site-packages/pip/_internal/network/utils.py
@@ -1,4 +1,4 @@
-from typing import Dict, Iterator
+from typing import Dict, Generator

 from pip._vendor.requests.models import CONTENT_CHUNK_SIZE, Response

@@ -56,7 +56,7 @@ def raise_for_status(resp: Response) -> None:

 def response_chunks(
    response: Response, chunk_size: int = CONTENT_CHUNK_SIZE
-) -> Iterator[bytes]:
+) -> Generator[bytes, None, None]:
    """Given a requests Response, provide the data chunks."""
    try:
        # Special case for urllib3.
--- a/venv/Lib/site-packages/pip/_internal/operations/build/metadata.py
+++ b/venv/Lib/site-packages/pip/_internal/operations/build/metadata.py
@@ -3,33 +3,37 @@

 import os

-from pip._vendor.pep517.wrappers import Pep517HookCaller
+from pip._vendor.pyproject_hooks import BuildBackendHookCaller

 from pip._internal.build_env import BuildEnvironment
+from pip._internal.exceptions import (
+    InstallationSubprocessError,
+    MetadataGenerationFailed,
+)
 from pip._internal.utils.subprocess import runner_with_spinner_message
 from pip._internal.utils.temp_dir import TempDirectory


-def generate_metadata(build_env, backend):
-    # type: (BuildEnvironment, Pep517HookCaller) -> str
+def generate_metadata(
+    build_env: BuildEnvironment, backend: BuildBackendHookCaller, details: str
+) -> str:
    """Generate metadata using mechanisms described in PEP 517.

    Returns the generated metadata directory.
    """
-    metadata_tmpdir = TempDirectory(
-        kind="modern-metadata", globally_managed=True
-    )
+    metadata_tmpdir = TempDirectory(kind="modern-metadata", globally_managed=True)

    metadata_dir = metadata_tmpdir.path

    with build_env:
-        # Note that Pep517HookCaller implements a fallback for
+        # Note that BuildBackendHookCaller implements a fallback for
        # prepare_metadata_for_build_wheel, so we don't have to
        # consider the possibility that this hook doesn't exist.
-        runner = runner_with_spinner_message("Preparing wheel metadata")
+        runner = runner_with_spinner_message("Preparing metadata (pyproject.toml)")
        with backend.subprocess_runner(runner):
-            distinfo_dir = backend.prepare_metadata_for_build_wheel(
-                metadata_dir
-            )
+            try:
+                distinfo_dir = backend.prepare_metadata_for_build_wheel(metadata_dir)
+            except InstallationSubprocessError as error:
+                raise MetadataGenerationFailed(package_details=details) from error

    return os.path.join(metadata_dir, distinfo_dir)
--- a/venv/Lib/site-packages/pip/_internal/operations/build/metadata_legacy.py
+++ b/venv/Lib/site-packages/pip/_internal/operations/build/metadata_legacy.py
@@ -5,7 +5,12 @@ import logging
 import os

 from pip._internal.build_env import BuildEnvironment
-from pip._internal.exceptions import InstallationError
+from pip._internal.cli.spinners import open_spinner
+from pip._internal.exceptions import (
+    InstallationError,
+    InstallationSubprocessError,
+    MetadataGenerationFailed,
+)
 from pip._internal.utils.setuptools_build import make_setuptools_egg_info_args
 from pip._internal.utils.subprocess import call_subprocess
 from pip._internal.utils.temp_dir import TempDirectory
@@ -13,49 +18,39 @@ from pip._internal.utils.temp_dir import TempDirectory
 logger = logging.getLogger(__name__)


-def _find_egg_info(directory):
-    # type: (str) -> str
-    """Find an .egg-info subdirectory in `directory`.
-    """
-    filenames = [
-        f for f in os.listdir(directory) if f.endswith(".egg-info")
-    ]
+def _find_egg_info(directory: str) -> str:
+    """Find an .egg-info subdirectory in `directory`."""
+    filenames = [f for f in os.listdir(directory) if f.endswith(".egg-info")]

    if not filenames:
-        raise InstallationError(
-            f"No .egg-info directory found in {directory}"
-        )
+        raise InstallationError(f"No .egg-info directory found in {directory}")

    if len(filenames) > 1:
        raise InstallationError(
-            "More than one .egg-info directory found in {}".format(
-                directory
-            )
+            "More than one .egg-info directory found in {}".format(directory)
        )

    return os.path.join(directory, filenames[0])


 def generate_metadata(
-    build_env,  # type: BuildEnvironment
-    setup_py_path,  # type: str
-    source_dir,  # type: str
-    isolated,  # type: bool
-    details,  # type: str
-):
-    # type: (...) -> str
+    build_env: BuildEnvironment,
+    setup_py_path: str,
+    source_dir: str,
+    isolated: bool,
+    details: str,
+) -> str:
    """Generate metadata using setup.py-based defacto mechanisms.

    Returns the generated metadata directory.
    """
    logger.debug(
-        'Running setup.py (path:%s) egg_info for package %s',
-        setup_py_path, details,
+        "Running setup.py (path:%s) egg_info for package %s",
+        setup_py_path,
+        details,
    )

-    egg_info_dir = TempDirectory(
-        kind="pip-egg-info", globally_managed=True
-    ).path
+    egg_info_dir = TempDirectory(kind="pip-egg-info", globally_managed=True).path

    args = make_setuptools_egg_info_args(
        setup_py_path,
@@ -64,11 +59,16 @@ def generate_metadata(
    )

    with build_env:
+        with open_spinner("Preparing metadata (setup.py)") as spinner:
+            try:
                call_subprocess(
                    args,
                    cwd=source_dir,
-            command_desc='python setup.py egg_info',
+                    command_desc="python setup.py egg_info",
+                    spinner=spinner,
                )
+            except InstallationSubprocessError as error:
+                raise MetadataGenerationFailed(package_details=details) from error

    # Return the .egg-info directory.
    return _find_egg_info(egg_info_dir)
--- a/Show More
+++ b/Show More