celery/celery/loaders/__init__.py

import os
from celery.loaders.djangoapp import Loader as DjangoLoader
from celery.loaders.default import Loader as DefaultLoader
from django.conf import settings
from django.core.management import setup_environ

"""
.. class:: Loader

The current loader class.

"""
Loader = DefaultLoader
if settings.configured:
    Loader = DjangoLoader
else:
    if not callable(getattr(os, "fork", None)):
        # Platform doesn't support fork()
        # XXX On systems without fork, multiprocessing seems to be launching
        # the processes in some other way which does not copy the memory
        # of the parent process. This means that any configured env might
        # be lost. This is a hack to make it work on Windows.
        # A better way might be to use os.environ to set the currently
        # used configuration method so to propogate it to the "child"
        # processes. But this has to be experimented with.
        # [asksol/heyman]
        try:
            settings_mod = os.environ.get("DJANGO_SETTINGS_MODULE",
                                          "settings")
            project_settings = __import__(settings_mod, {}, {}, [''])
            setup_environ(project_settings)
            Loader = DjangoLoader
        except ImportError:
            pass

"""
.. data:: current_loader

The current loader instance.

"""
current_loader = Loader()


"""
.. data:: settings

The global settings object.

"""
settings = current_loader.conf