Added custom template loader to CMS in order to enable {% include %} and {% import %} in jinja temp…

sitescripts/utils.py

 # coding: utf-8
 
 # This file is part of the Adblock Plus web scripts,
 # Copyright (C) 2006-2013 Eyeo GmbH
 #
 # Adblock Plus is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License version 3 as
 # published by the Free Software Foundation.
 #
 # Adblock Plus is distributed in the hope that it will be useful,
@@ skipping 124 matching lines @@
   """
     Returns a Jinja2 template environment without autoescaping. Don't use this to
     generate HTML files!
   """
   from sitescripts.templateFilters import filters
   import jinja2
   env = jinja2.Environment(loader=jinja2.FileSystemLoader(siteScriptsPath))
   env.filters.update(filters)
   return env
 
-def get_custom_template_environment(additional_filters):
+def get_custom_template_environment(additional_filters, loader=None):
   """
     Returns a custom Jinja2 template environment with additional filters.
   """
   from sitescripts.templateFilters import filters
   import jinja2
-  env = jinja2.Environment(loader=jinja2.FileSystemLoader(siteScriptsPath), autoescape=True)
+  if not loader:
+    loader = jinja2.FileSystemLoader(siteScriptsPath)
+  env = jinja2.Environment(loader=loader, autoescape=True)
   env.filters.update(filters)
   env.filters.update(additional_filters)
   return env