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import os
import sys
from django.apps import apps
from django.utils import lru_cache
from django.utils import six
@lru_cache.lru_cache()
def get_app_template_dirs(dirname):
"""
Return an iterable of paths of directories to load app templates from.
dirname is the name of the subdirectory containing templates inside
installed applications.
"""
if six.PY2:
fs_encoding = sys.getfilesystemencoding() or sys.getdefaultencoding()
template_dirs = []
for app_config in apps.get_app_configs():
if not app_config.path:
continue
template_dir = os.path.join(app_config.path, dirname)
if os.path.isdir(template_dir):
if six.PY2:
template_dir = template_dir.decode(fs_encoding)
template_dirs.append(template_dir)
# Immutable return value because it will be cached and shared by callers.
return tuple(template_dirs)
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