Issue 3750 - Avoid re-generating subscription list for each locale

globals/get_subscriptions.py

 # This file is part of the Adblock Plus website,
 # Copyright (C) 2006-2016 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,
 # but WITHOUT ANY WARRANTY; without even the implied warranty of
 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 # GNU General Public License for more details.
 #
 # You should have received a copy of the GNU General Public License
 # along with Adblock Plus.  If not, see <http://www.gnu.org/licenses/>.
 
 import codecs
 import os
 import tarfile
 import urllib
 import logging
 from ConfigParser import SafeConfigParser
 
-def get_subscriptions(_):
+subscriptions = None
+
+def get_subscriptions():
+  global subscriptions
+  if not subscriptions is None:
+    return subscriptions
   try:
     from sitescripts.subscriptions import subscriptionParser
   except ImportError:
     logging.warning("Unable to import sitescripts, proceeding with empty "
                     "subscriptions list.")
     return []
 
   result = {}
   utf8_reader = codecs.getreader('utf8')
   source = urllib.urlopen("https://hg.adblockplus.org/subscriptionlist/archive/default.tar.gz")
@@ skipping 16 matching lines @@
         filedata = subscriptionParser.parse_file(fileinfo.name, utf8_reader(archive.extractfile(fileinfo)))
         if filedata.unavailable:
           continue
 
         result[filedata.name] = filedata
   finally:
     source.close()
     subscriptionParser.get_settings = orig_get_settings
 
   subscriptionParser.calculate_supplemented(result)
-  return result.values()
+  subscriptions = result.values()
+  return subscriptions