[1.0.X] Fixed #9579 -- Properly handle apps running with (and specifically,...

"""

import os

import sys

from django.conf import settings

from django.core.exceptions import ImproperlyConfigured

from django.utils._os import safe_join

# At compile time, cache the directories to search.

fs_encoding = sys.getfilesystemencoding() or sys.getdefaultencoding()

app_template_dirs = []

for app in settings.INSTALLED_APPS:

    i = app.rfind('.')

        raise ImproperlyConfigured, 'ImportError %s: %s' % (app, e.args[0])

    template_dir = os.path.join(os.path.dirname(mod.__file__), 'templates')

    if os.path.isdir(template_dir):

        app_template_dirs.append(template_dir)

        app_template_dirs.append(template_dir.decode(fs_encoding))

# It won't change, so convert it to a tuple to save memory.

app_template_dirs = tuple(app_template_dirs)

from os.path import join, normcase, abspath, sep

import os

from os.path import join, normcase, normpath, abspath, isabs, sep

from django.utils.encoding import force_unicode

# Define our own abspath function that can handle joining 

# unicode paths to a current working directory that has non-ASCII

# characters in it.  This isn't necessary on Windows since the 

# Windows version of abspath handles this correctly.  The Windows

# abspath also handles drive letters differently than the pure 

# Python implementation, so it's best not to replace it.

if os.name == 'nt':

    abspathu = abspath

else:

    def abspathu(path):

        """

        Version of os.path.abspath that uses the unicode representation

        of the current working directory, thus avoiding a UnicodeDecodeError

        in join when the cwd has non-ASCII characters.

        """

        if not isabs(path):

            path = join(os.getcwdu(), path)

        return normpath(path)

def safe_join(base, *paths):

    """

    Joins one or more path components to the base path component intelligently.

    # insensitive operating systems (like Windows).

    base = force_unicode(base)

    paths = [force_unicode(p) for p in paths]

    final_path = normcase(abspath(join(base, *paths)))

    base_path = normcase(abspath(base))

    final_path = normcase(abspathu(join(base, *paths)))

    base_path = normcase(abspathu(base))

    base_path_len = len(base_path)

    # Ensure final_path starts with base_path and that the next character after

    # the final path is os.sep (or nothing, in which case final_path must be