The Tor Browser / file revision

 #!/usr/bin/env python

 # This Source Code Form is subject to the terms of the Mozilla Public

 # License, v. 2.0. If a copy of the MPL was not distributed with this

 # file, You can obtain one at http://mozilla.org/MPL/2.0/.

 """

 Fix references to source files of the form [LOCpath]

 so that they are relative to a given source directory.

 Substitute the DOT-generated image map into the document.

 """

 import os, sys, re

 (srcdir, ) = sys.argv[1:]

 srcdir = os.path.realpath(srcdir)

 f = re.compile(r'\[LOC(.*?)\]')

 def replacer(m):

     file = m.group(1)

     file = os.path.realpath(file)

     if not file.startswith(srcdir):

         raise Exception("File %s doesn't start with %s" % (file, srcdir))

     file = file[len(srcdir) + 1:]

     return file

 s = re.compile(r'\[MAP(.*?)\]')

 def mapreplace(m):

     file = m.group(1)

     c = open(file).read()

     return c

 for line in sys.stdin:

     line = f.sub(replacer, line)

     line = s.sub(mapreplace, line)

     sys.stdout.write(line)