Stats processing: don`t create file names that are too long

sitescripts/stats/common.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,
 # 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 re, hashlib
+import re
+import hashlib
 
 def filename_encode(name):
   """
     This encodes any string to a valid file name while ensuring that the
     original string can still be reconstructed. All characters except 0-9, A-Z,
     the period and underscore are encoded as "-12cd" where "12cd" stands for the
     hexadecimal representation of the character's ordinal. File names longer
     than 150 characters will be still be unique but no longer reversible due to
     file system limitations.
   """
   result = re.sub(r"[^\w\.]", lambda match: "-%04x" % ord(match.group(0)), name)
   if len(result) > 150:
-    hash = hashlib.md5()
-    hash.update(result[150:])
-    result = result[:150] + "--%s" % hash.hexdigest()
+    result = result[:150] + "--%s" % hashlib.md5(result[150:]).hexdigest()
   return result
 
 def filename_decode(path):
   """
     This reconstructs a string encoded with filename_encode().
   """
   path = re.sub(r"--[0-9A-Fa-f]{32}", u"\u2026", path)
   path = re.sub(r"-([0-9a-f]{4})", lambda match: unichr(int(match.group(1), 16)), path)
   return path
 
@@ skipping 108 matching lines @@
 install_fields = [
   {
     "name": "installType",
     "title": "Install types",
     "coltitle": "Install type",
   },
 ]
 
 
 fields = basic_fields + downloader_fields + install_fields