Make local dev work by trying checking staticfiles_storage for both the course_prefixed and non-course_prefixed urls

common/djangoapps/static_replace/__init__.py

@@ -76,18 +76,19 @@ def replace_static_urls(text, data_directory, course_namespace=None):
         # course_namespace is not None, then use studio style urls
         if course_namespace is not None and not isinstance(modulestore(), XMLModuleStore):
             url = StaticContent.convert_legacy_static_url(rest, course_namespace)
-        # If we're in debug mode, and the file as requested exists, then don't change the links
-        elif (settings.DEBUG and finders.find(rest, True)):
-            return original
-        # Otherwise, look the file up in staticfiles_storage without the data directory
+        # Otherwise, look the file up in staticfiles_storage, and append the data directory if needed
         else:
+            course_path = "/".join((data_directory, rest))
             try:
-                url = staticfiles_storage.url(rest)
+                if staticfiles_storage.exists(rest):
+                    url = staticfiles_storage.url(rest)
+                else:
+                    url = staticfiles_storage.url(course_path)
             # And if that fails, assume that it's course content, and add manually data directory
             except Exception as err:
                 log.warning("staticfiles_storage couldn't find path {0}: {1}".format(
                     rest, str(err)))
-                url = "".join([prefix, data_directory, '/', rest])
+                url = "".join([prefix, course_path])
 
         return "".join([quote, url, quote])