#!/usr/bin/env python2

import sys
from bzrlib import bencode

if __name__ == '__main__':
   torrentdata = bencode.bdecode (file (sys.argv[1]).read())
   if not torrentdata.has_key ('url-list'):
      torrentdata['url-list'] = []

   new_urls = []

   for url in torrentdata['url-list']:
      if url not in new_urls:
         new_urls.append (url)

   for url in sys.argv[3:]:
      if url not in new_urls:
         new_urls.append (url)

   torrentdata['url-list'] = new_urls

   outfile = file (sys.argv[2], "w")
   outfile.write (bencode.bencode (torrentdata))
   outfile.close ()