initial commit
This commit is contained in:
@@ -0,0 +1,415 @@
|
||||
"""
|
||||
Settings and configuration for Django.
|
||||
|
||||
Read values from the module specified by the DJANGO_SETTINGS_MODULE environment
|
||||
variable, and then from django.conf.global_settings; see the global_settings.py
|
||||
for a list of all possible variables.
|
||||
"""
|
||||
|
||||
import importlib
|
||||
import os
|
||||
import time
|
||||
import warnings
|
||||
from pathlib import Path
|
||||
|
||||
from django.conf import global_settings
|
||||
from django.core.exceptions import ImproperlyConfigured
|
||||
from django.utils.deprecation import (
|
||||
RemovedInDjango70Warning,
|
||||
django_file_prefixes,
|
||||
warn_about_external_use,
|
||||
)
|
||||
from django.utils.functional import LazyObject, empty
|
||||
|
||||
ENVIRONMENT_VARIABLE = "DJANGO_SETTINGS_MODULE"
|
||||
DEFAULT_STORAGE_ALIAS = "default"
|
||||
STATICFILES_STORAGE_ALIAS = "staticfiles"
|
||||
|
||||
# RemovedInDjango70Warning.
|
||||
SIGNED_COOKIE_LEGACY_SALT_DEPRECATED_MSG = (
|
||||
"The SIGNED_COOKIE_LEGACY_SALT_FALLBACK transitional setting is "
|
||||
"deprecated. Remove it from your settings once legacy signed cookies "
|
||||
"have expired. They will not be accepted in Django 7.0."
|
||||
)
|
||||
# RemovedInDjango70Warning.
|
||||
USE_BLANK_CHOICE_DASH_DEPRECATED_MSG = (
|
||||
"The USE_BLANK_CHOICE_DASH setting is deprecated. If you wish to define "
|
||||
"your own default blank choice label, override "
|
||||
"django.db.models.fields.BLANK_CHOICE_LABEL in your app's ready() method."
|
||||
)
|
||||
|
||||
# RemovedInDjango70Warning.
|
||||
DEPRECATED_EMAIL_SETTINGS = {
|
||||
"EMAIL_BACKEND",
|
||||
"EMAIL_FILE_PATH",
|
||||
"EMAIL_HOST",
|
||||
"EMAIL_HOST_PASSWORD",
|
||||
"EMAIL_HOST_USER",
|
||||
"EMAIL_PORT",
|
||||
"EMAIL_SSL_CERTFILE",
|
||||
"EMAIL_SSL_KEYFILE",
|
||||
"EMAIL_TIMEOUT",
|
||||
"EMAIL_USE_SSL",
|
||||
"EMAIL_USE_TLS",
|
||||
}
|
||||
EMAIL_SETTING_DEPRECATED_MSG = (
|
||||
"The {name} setting is deprecated. Migrate to MAILERS before Django 7.0."
|
||||
)
|
||||
|
||||
|
||||
# RemovedInDjango70Warning.
|
||||
# Must be called with the complete set of user-defined setting names (but no
|
||||
# default settings).
|
||||
def _check_email_settings_conflicts(explicit_settings):
|
||||
deprecated = DEPRECATED_EMAIL_SETTINGS.intersection(explicit_settings)
|
||||
if deprecated and "MAILERS" in explicit_settings:
|
||||
deprecated_str = ", ".join(sorted(deprecated))
|
||||
raise ImproperlyConfigured(
|
||||
"Deprecated email settings are not allowed when MAILERS is "
|
||||
f"defined: {deprecated_str}."
|
||||
)
|
||||
|
||||
|
||||
class SettingsReference(str):
|
||||
"""
|
||||
String subclass which references a current settings value. It's treated as
|
||||
the value in memory but serializes to a settings.NAME attribute reference.
|
||||
"""
|
||||
|
||||
def __new__(self, value, setting_name):
|
||||
return str.__new__(self, value)
|
||||
|
||||
def __init__(self, value, setting_name):
|
||||
self.setting_name = setting_name
|
||||
|
||||
|
||||
class LazySettings(LazyObject):
|
||||
"""
|
||||
A lazy proxy for either global Django settings or a custom settings object.
|
||||
The user can manually configure settings prior to using them. Otherwise,
|
||||
Django uses the settings module pointed to by DJANGO_SETTINGS_MODULE.
|
||||
"""
|
||||
|
||||
def _setup(self, name=None):
|
||||
"""
|
||||
Load the settings module pointed to by the environment variable. This
|
||||
is used the first time settings are needed, if the user hasn't
|
||||
configured settings manually.
|
||||
"""
|
||||
settings_module = os.environ.get(ENVIRONMENT_VARIABLE)
|
||||
if not settings_module:
|
||||
desc = ("setting %s" % name) if name else "settings"
|
||||
raise ImproperlyConfigured(
|
||||
"Requested %s, but settings are not configured. "
|
||||
"You must either define the environment variable %s "
|
||||
"or call settings.configure() before accessing settings."
|
||||
% (desc, ENVIRONMENT_VARIABLE)
|
||||
)
|
||||
|
||||
self._wrapped = Settings(settings_module)
|
||||
|
||||
def __repr__(self):
|
||||
# Hardcode the class name as otherwise it yields 'Settings'.
|
||||
if self._wrapped is empty:
|
||||
return "<LazySettings [Unevaluated]>"
|
||||
return '<LazySettings "%(settings_module)s">' % {
|
||||
"settings_module": self._wrapped.SETTINGS_MODULE,
|
||||
}
|
||||
|
||||
def __getattr__(self, name):
|
||||
"""Return the value of a setting and cache it in self.__dict__."""
|
||||
if (_wrapped := self._wrapped) is empty:
|
||||
self._setup(name)
|
||||
_wrapped = self._wrapped
|
||||
val = getattr(_wrapped, name)
|
||||
|
||||
# RemovedInDjango70Warning.
|
||||
if name in DEPRECATED_EMAIL_SETTINGS:
|
||||
if hasattr(_wrapped, "MAILERS"):
|
||||
raise AttributeError(
|
||||
f"The {name} setting is not available when MAILERS is defined."
|
||||
)
|
||||
_show_settings_deprecation_warning(
|
||||
EMAIL_SETTING_DEPRECATED_MSG.format(name=name), RemovedInDjango70Warning
|
||||
)
|
||||
|
||||
# Special case some settings which require further modification.
|
||||
# This is done here for performance reasons so the modified value is
|
||||
# cached.
|
||||
if name in {"MEDIA_URL", "STATIC_URL"} and val is not None:
|
||||
val = self._add_script_prefix(val)
|
||||
elif name == "SECRET_KEY" and not val:
|
||||
raise ImproperlyConfigured("The SECRET_KEY setting must not be empty.")
|
||||
|
||||
self.__dict__[name] = val
|
||||
return val
|
||||
|
||||
def __setattr__(self, name, value):
|
||||
"""
|
||||
Set the value of setting. Clear all cached values if _wrapped changes
|
||||
(@override_settings does this) or clear single values when set.
|
||||
"""
|
||||
if name == "_wrapped":
|
||||
self.__dict__.clear()
|
||||
else:
|
||||
self.__dict__.pop(name, None)
|
||||
|
||||
# RemovedInDjango70Warning.
|
||||
if name == "SIGNED_COOKIE_LEGACY_SALT_FALLBACK":
|
||||
_show_settings_deprecation_warning(
|
||||
SIGNED_COOKIE_LEGACY_SALT_DEPRECATED_MSG,
|
||||
RemovedInDjango70Warning,
|
||||
)
|
||||
# RemovedInDjango70Warning.
|
||||
if name == "USE_BLANK_CHOICE_DASH":
|
||||
_show_settings_deprecation_warning(
|
||||
USE_BLANK_CHOICE_DASH_DEPRECATED_MSG, RemovedInDjango70Warning
|
||||
)
|
||||
# RemovedInDjango70Warning.
|
||||
if name == "MAILERS":
|
||||
# When MAILERS is set, clear any cached values of
|
||||
# deprecated settings so that __getattr__() runs again for them.
|
||||
for setting in DEPRECATED_EMAIL_SETTINGS:
|
||||
self.__dict__.pop(setting, None)
|
||||
if name in DEPRECATED_EMAIL_SETTINGS:
|
||||
_show_settings_deprecation_warning(
|
||||
EMAIL_SETTING_DEPRECATED_MSG.format(name=name), RemovedInDjango70Warning
|
||||
)
|
||||
|
||||
super().__setattr__(name, value)
|
||||
|
||||
def __delattr__(self, name):
|
||||
"""Delete a setting and clear it from cache if needed."""
|
||||
super().__delattr__(name)
|
||||
self.__dict__.pop(name, None)
|
||||
|
||||
# RemovedInDjango70Warning.
|
||||
def __dir__(self):
|
||||
attrs = super().__dir__()
|
||||
if hasattr(self._wrapped, "MAILERS"):
|
||||
# When MAILERS is defined, filter out deprecated email
|
||||
# settings that are from the global_settings defaults.
|
||||
attrs = [
|
||||
name
|
||||
for name in attrs
|
||||
if name not in DEPRECATED_EMAIL_SETTINGS
|
||||
or self._wrapped.is_overridden(name)
|
||||
]
|
||||
return attrs
|
||||
|
||||
def configure(self, default_settings=global_settings, **options):
|
||||
"""
|
||||
Called to manually configure the settings. The 'default_settings'
|
||||
parameter sets where to retrieve any unspecified values from (its
|
||||
argument must support attribute access (__getattr__)).
|
||||
"""
|
||||
if self._wrapped is not empty:
|
||||
raise RuntimeError("Settings already configured.")
|
||||
|
||||
# RemovedInDjango70Warning.
|
||||
_check_email_settings_conflicts(options.keys())
|
||||
|
||||
holder = UserSettingsHolder(default_settings)
|
||||
for name, value in options.items():
|
||||
if not name.isupper():
|
||||
raise TypeError("Setting %r must be uppercase." % name)
|
||||
setattr(holder, name, value)
|
||||
self._wrapped = holder
|
||||
|
||||
@staticmethod
|
||||
def _add_script_prefix(value):
|
||||
"""
|
||||
Add SCRIPT_NAME prefix to relative paths.
|
||||
|
||||
Useful when the app is being served at a subpath and manually prefixing
|
||||
subpath to STATIC_URL and MEDIA_URL in settings is inconvenient.
|
||||
"""
|
||||
# Don't apply prefix to absolute paths and URLs.
|
||||
if value.startswith(("http://", "https://", "/")):
|
||||
return value
|
||||
from django.urls import get_script_prefix
|
||||
|
||||
return "%s%s" % (get_script_prefix(), value)
|
||||
|
||||
@property
|
||||
def configured(self):
|
||||
"""Return True if the settings have already been configured."""
|
||||
return self._wrapped is not empty
|
||||
|
||||
|
||||
class Settings:
|
||||
def __init__(self, settings_module):
|
||||
# update this dict from global settings (but only for ALL_CAPS
|
||||
# settings)
|
||||
for setting in dir(global_settings):
|
||||
if setting.isupper():
|
||||
setattr(self, setting, getattr(global_settings, setting))
|
||||
|
||||
# store the settings module in case someone later cares
|
||||
self.SETTINGS_MODULE = settings_module
|
||||
|
||||
mod = importlib.import_module(self.SETTINGS_MODULE)
|
||||
|
||||
tuple_settings = (
|
||||
"ALLOWED_HOSTS",
|
||||
"INSTALLED_APPS",
|
||||
"TEMPLATE_DIRS",
|
||||
"LOCALE_PATHS",
|
||||
"SECRET_KEY_FALLBACKS",
|
||||
)
|
||||
self._explicit_settings = set()
|
||||
for setting in dir(mod):
|
||||
if setting.isupper():
|
||||
setting_value = getattr(mod, setting)
|
||||
|
||||
if setting in tuple_settings and not isinstance(
|
||||
setting_value, (list, tuple)
|
||||
):
|
||||
raise ImproperlyConfigured(
|
||||
"The %s setting must be a list or a tuple." % setting
|
||||
)
|
||||
setattr(self, setting, setting_value)
|
||||
self._explicit_settings.add(setting)
|
||||
|
||||
# RemovedInDjango70Warning.
|
||||
if "SIGNED_COOKIE_LEGACY_SALT_FALLBACK" in self._explicit_settings:
|
||||
warnings.warn(
|
||||
SIGNED_COOKIE_LEGACY_SALT_DEPRECATED_MSG,
|
||||
RemovedInDjango70Warning,
|
||||
skip_file_prefixes=django_file_prefixes(),
|
||||
)
|
||||
# RemovedInDjango70Warning.
|
||||
if "USE_BLANK_CHOICE_DASH" in self._explicit_settings:
|
||||
warnings.warn(
|
||||
USE_BLANK_CHOICE_DASH_DEPRECATED_MSG,
|
||||
RemovedInDjango70Warning,
|
||||
skip_file_prefixes=django_file_prefixes(),
|
||||
)
|
||||
# RemovedInDjango70Warning.
|
||||
_check_email_settings_conflicts(self._explicit_settings)
|
||||
for name in DEPRECATED_EMAIL_SETTINGS.intersection(self._explicit_settings):
|
||||
warnings.warn(
|
||||
EMAIL_SETTING_DEPRECATED_MSG.format(name=name),
|
||||
RemovedInDjango70Warning,
|
||||
skip_file_prefixes=django_file_prefixes(),
|
||||
)
|
||||
|
||||
if hasattr(time, "tzset") and self.TIME_ZONE:
|
||||
# When we can, attempt to validate the timezone. If we can't find
|
||||
# this file, no check happens and it's harmless.
|
||||
zoneinfo_root = Path("/usr/share/zoneinfo")
|
||||
zone_info_file = zoneinfo_root.joinpath(*self.TIME_ZONE.split("/"))
|
||||
if zoneinfo_root.exists() and not zone_info_file.exists():
|
||||
raise ValueError("Incorrect timezone setting: %s" % self.TIME_ZONE)
|
||||
# Move the time zone info into os.environ. See ticket #2315 for why
|
||||
# we don't do this unconditionally (breaks Windows).
|
||||
os.environ["TZ"] = self.TIME_ZONE
|
||||
time.tzset()
|
||||
|
||||
def is_overridden(self, setting):
|
||||
return setting in self._explicit_settings
|
||||
|
||||
def __repr__(self):
|
||||
return '<%(cls)s "%(settings_module)s">' % {
|
||||
"cls": self.__class__.__name__,
|
||||
"settings_module": self.SETTINGS_MODULE,
|
||||
}
|
||||
|
||||
|
||||
class UserSettingsHolder:
|
||||
"""Holder for user configured settings."""
|
||||
|
||||
# SETTINGS_MODULE doesn't make much sense in the manually configured
|
||||
# (standalone) case.
|
||||
SETTINGS_MODULE = None
|
||||
|
||||
def __init__(self, default_settings):
|
||||
"""
|
||||
Requests for configuration variables not in this class are satisfied
|
||||
from the module specified in default_settings (if possible).
|
||||
"""
|
||||
self.__dict__["_deleted"] = set()
|
||||
self.default_settings = default_settings
|
||||
|
||||
def __getattr__(self, name):
|
||||
if not name.isupper() or name in self._deleted:
|
||||
raise AttributeError
|
||||
return getattr(self.default_settings, name)
|
||||
|
||||
def __setattr__(self, name, value):
|
||||
self._deleted.discard(name)
|
||||
# RemovedInDjango70Warning.
|
||||
if name == "SIGNED_COOKIE_LEGACY_SALT_FALLBACK":
|
||||
_show_settings_deprecation_warning(
|
||||
SIGNED_COOKIE_LEGACY_SALT_DEPRECATED_MSG,
|
||||
RemovedInDjango70Warning,
|
||||
)
|
||||
# RemovedInDjango70Warning.
|
||||
if name == "USE_BLANK_CHOICE_DASH":
|
||||
_show_settings_deprecation_warning(
|
||||
USE_BLANK_CHOICE_DASH_DEPRECATED_MSG, RemovedInDjango70Warning
|
||||
)
|
||||
# RemovedInDjango70Warning.
|
||||
if name in DEPRECATED_EMAIL_SETTINGS:
|
||||
_show_settings_deprecation_warning(
|
||||
EMAIL_SETTING_DEPRECATED_MSG.format(name=name), RemovedInDjango70Warning
|
||||
)
|
||||
|
||||
super().__setattr__(name, value)
|
||||
|
||||
def __delattr__(self, name):
|
||||
self._deleted.add(name)
|
||||
if hasattr(self, name):
|
||||
super().__delattr__(name)
|
||||
|
||||
def __dir__(self):
|
||||
return sorted(
|
||||
s
|
||||
for s in [*self.__dict__, *dir(self.default_settings)]
|
||||
if s not in self._deleted
|
||||
)
|
||||
|
||||
def is_overridden(self, setting):
|
||||
deleted = setting in self._deleted
|
||||
set_locally = setting in self.__dict__
|
||||
set_on_default = getattr(
|
||||
self.default_settings, "is_overridden", lambda s: False
|
||||
)(setting)
|
||||
return deleted or set_locally or set_on_default
|
||||
|
||||
def __repr__(self):
|
||||
return "<%(cls)s>" % {
|
||||
"cls": self.__class__.__name__,
|
||||
}
|
||||
|
||||
|
||||
def _show_settings_deprecation_warning(message, category):
|
||||
"""Issue a warning when external code uses a deprecated setting.
|
||||
|
||||
Allow Django's own code to use the setting without emitting the warning.
|
||||
This function should only be called from within settings-related code.
|
||||
"""
|
||||
warn_about_external_use(
|
||||
message,
|
||||
category,
|
||||
skip_name_prefixes=(
|
||||
# Include all settings-related code here. (Do not include all of
|
||||
# "django.conf", which would incorrectly identify any deprecated
|
||||
# settings usage inside django.conf.urls as external.)
|
||||
"django.conf.LazySettings",
|
||||
"django.conf.Settings",
|
||||
"django.conf.UserSettingsHolder",
|
||||
"django.utils.functional.LazyObject", # LazySettings superclass.
|
||||
# override_settings() and similar test utils must be treated as
|
||||
# settings-related code, else deprecated settings usage in tests
|
||||
# would be incorrectly identified as internal.
|
||||
"django.test.utils.override_settings",
|
||||
"django.test.utils.modify_settings",
|
||||
"django.test.utils.TestContextDecorator",
|
||||
"django.test.testcases.SimpleTestCase.settings",
|
||||
"django.test.testcases.SimpleTestCase.modify_settings",
|
||||
),
|
||||
)
|
||||
|
||||
|
||||
settings = LazySettings()
|
||||
Reference in New Issue
Block a user