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Ambulance Clerc
210
venv/Lib/site-packages/django/contrib/auth/checks.py
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210
venv/Lib/site-packages/django/contrib/auth/checks.py
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from itertools import chain
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from types import MethodType
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from django.apps import apps
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from django.conf import settings
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from django.core import checks
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from .management import _get_builtin_permissions
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def check_user_model(app_configs=None, **kwargs):
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if app_configs is None:
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cls = apps.get_model(settings.AUTH_USER_MODEL)
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else:
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app_label, model_name = settings.AUTH_USER_MODEL.split('.')
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for app_config in app_configs:
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if app_config.label == app_label:
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cls = app_config.get_model(model_name)
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break
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else:
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# Checks might be run against a set of app configs that don't
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# include the specified user model. In this case we simply don't
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# perform the checks defined below.
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return []
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errors = []
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# Check that REQUIRED_FIELDS is a list
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if not isinstance(cls.REQUIRED_FIELDS, (list, tuple)):
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errors.append(
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checks.Error(
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"'REQUIRED_FIELDS' must be a list or tuple.",
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obj=cls,
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id='auth.E001',
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)
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)
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# Check that the USERNAME FIELD isn't included in REQUIRED_FIELDS.
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if cls.USERNAME_FIELD in cls.REQUIRED_FIELDS:
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errors.append(
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checks.Error(
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"The field named as the 'USERNAME_FIELD' "
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"for a custom user model must not be included in 'REQUIRED_FIELDS'.",
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hint=(
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"The 'USERNAME_FIELD' is currently set to '%s', you "
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"should remove '%s' from the 'REQUIRED_FIELDS'."
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% (cls.USERNAME_FIELD, cls.USERNAME_FIELD)
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),
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obj=cls,
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id='auth.E002',
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)
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)
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# Check that the username field is unique
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if not cls._meta.get_field(cls.USERNAME_FIELD).unique and not any(
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constraint.fields == (cls.USERNAME_FIELD,)
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for constraint in cls._meta.total_unique_constraints
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):
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if (settings.AUTHENTICATION_BACKENDS ==
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['django.contrib.auth.backends.ModelBackend']):
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errors.append(
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checks.Error(
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"'%s.%s' must be unique because it is named as the 'USERNAME_FIELD'." % (
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cls._meta.object_name, cls.USERNAME_FIELD
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),
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obj=cls,
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id='auth.E003',
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)
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)
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else:
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errors.append(
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checks.Warning(
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"'%s.%s' is named as the 'USERNAME_FIELD', but it is not unique." % (
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cls._meta.object_name, cls.USERNAME_FIELD
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),
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hint='Ensure that your authentication backend(s) can handle non-unique usernames.',
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obj=cls,
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id='auth.W004',
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)
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)
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if isinstance(cls().is_anonymous, MethodType):
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errors.append(
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checks.Critical(
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'%s.is_anonymous must be an attribute or property rather than '
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'a method. Ignoring this is a security issue as anonymous '
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'users will be treated as authenticated!' % cls,
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obj=cls,
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id='auth.C009',
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)
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)
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if isinstance(cls().is_authenticated, MethodType):
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errors.append(
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checks.Critical(
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'%s.is_authenticated must be an attribute or property rather '
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'than a method. Ignoring this is a security issue as anonymous '
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'users will be treated as authenticated!' % cls,
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obj=cls,
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id='auth.C010',
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)
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)
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return errors
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def check_models_permissions(app_configs=None, **kwargs):
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if app_configs is None:
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models = apps.get_models()
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else:
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models = chain.from_iterable(app_config.get_models() for app_config in app_configs)
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Permission = apps.get_model('auth', 'Permission')
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permission_name_max_length = Permission._meta.get_field('name').max_length
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permission_codename_max_length = Permission._meta.get_field('codename').max_length
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errors = []
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for model in models:
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opts = model._meta
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builtin_permissions = dict(_get_builtin_permissions(opts))
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# Check builtin permission name length.
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max_builtin_permission_name_length = (
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max(len(name) for name in builtin_permissions.values())
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if builtin_permissions else 0
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)
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if max_builtin_permission_name_length > permission_name_max_length:
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verbose_name_max_length = (
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permission_name_max_length - (max_builtin_permission_name_length - len(opts.verbose_name_raw))
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)
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errors.append(
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checks.Error(
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"The verbose_name of model '%s' must be at most %d "
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"characters for its builtin permission names to be at "
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"most %d characters." % (
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opts.label, verbose_name_max_length, permission_name_max_length
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),
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obj=model,
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id='auth.E007',
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)
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)
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# Check builtin permission codename length.
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max_builtin_permission_codename_length = (
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max(len(codename) for codename in builtin_permissions.keys())
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if builtin_permissions else 0
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)
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if max_builtin_permission_codename_length > permission_codename_max_length:
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model_name_max_length = permission_codename_max_length - (
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max_builtin_permission_codename_length - len(opts.model_name)
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)
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errors.append(
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checks.Error(
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"The name of model '%s' must be at most %d characters "
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"for its builtin permission codenames to be at most %d "
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"characters." % (
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opts.label,
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model_name_max_length,
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permission_codename_max_length,
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),
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obj=model,
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id='auth.E011',
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)
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)
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codenames = set()
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for codename, name in opts.permissions:
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# Check custom permission name length.
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if len(name) > permission_name_max_length:
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errors.append(
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checks.Error(
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"The permission named '%s' of model '%s' is longer "
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"than %d characters." % (
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name, opts.label, permission_name_max_length,
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),
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obj=model,
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id='auth.E008',
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)
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)
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# Check custom permission codename length.
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if len(codename) > permission_codename_max_length:
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errors.append(
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checks.Error(
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"The permission codenamed '%s' of model '%s' is "
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"longer than %d characters." % (
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codename,
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opts.label,
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permission_codename_max_length,
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),
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obj=model,
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id='auth.E012',
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)
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)
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# Check custom permissions codename clashing.
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if codename in builtin_permissions:
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errors.append(
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checks.Error(
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"The permission codenamed '%s' clashes with a builtin permission "
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"for model '%s'." % (codename, opts.label),
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obj=model,
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id='auth.E005',
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)
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)
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elif codename in codenames:
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errors.append(
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checks.Error(
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"The permission codenamed '%s' is duplicated for "
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"model '%s'." % (codename, opts.label),
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obj=model,
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id='auth.E006',
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)
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)
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codenames.add(codename)
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return errors
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