Move doc_url function out of edxmako middleware

cms/djangoapps/contentstore/context_processors.py

@@ -0,0 +1,20 @@
+import ConfigParser
+from django.conf import settings
+
+
+def doc_url(request):
+    config_file = open(settings.REPO_ROOT / "docs" / "config.ini")
+    config = ConfigParser.ConfigParser()
+    config.readfp(config_file)
+
+    # in the future, we will detect the locale; for now, we will
+    # hardcode en_us, since we only have English documentation
+    locale = "en_us"
+
+    def get_doc_url(token):
+        try:
+            return config.get(locale, token)
+        except ConfigParser.NoOptionError:
+            return config.get(locale, "default")
+
+    return {"doc_url": get_doc_url}