Add a workaround for django bug 18404 (fixes #204)

openslides/openslides_settings.py

@@ -84,6 +84,13 @@ STATICFILES_DIRS = (
     _fs2unicode(os.path.join(SITE_ROOT, 'static')),
 )
 
+#XXX: Note this setting (as well as our workaround finder)
+#     can be removed again once django-bug-#18404 has been resolved
+STATICFILES_FINDERS = (
+    'django.contrib.staticfiles.finders.FileSystemFinder',
+    'openslides.utils.staticfiles.AppDirectoriesFinder',
+)
+
 MESSAGE_STORAGE = 'django.contrib.messages.storage.cookie.CookieStorage'
 
 # List of callables that know how to import templates from various sources.

openslides/utils/staticfiles.py

@@ -0,0 +1,34 @@
+import os
+import sys
+
+from django.core.files.storage import FileSystemStorage
+from django.utils.importlib import import_module
+from django.contrib.staticfiles.finders import (
+    AppDirectoriesFinder as _AppDirectoriesFinder)
+
+
+# This is basically a copy of django.contrib.staticfiles.storage.AppStaticStorage
+# with the fix for django bug #18404 applied
+# see  https://code.djangoproject.com/ticket/18404 for details
+class AppStaticStorage(FileSystemStorage):
+    """
+    A file system storage backend that takes an app module and works
+    for the ``static`` directory of it.
+    """
+    prefix = None
+    source_dir = 'static'
+
+    def __init__(self, app, *args, **kwargs):
+        """
+        Returns a static file storage if available in the given app.
+        """
+        # app is the actual app module
+        mod = import_module(app)
+        mod_path = os.path.dirname(mod.__file__)
+        location = os.path.join(mod_path, self.source_dir)
+        fs_encoding = sys.getfilesystemencoding() or sys.getdefaultencoding()
+        location = location.decode(fs_encoding)
+        super(AppStaticStorage, self).__init__(location, *args, **kwargs)
+
+class AppDirectoriesFinder(_AppDirectoriesFinder):
+    storage_class = AppStaticStorage