1#!/usr/bin/env python
2# Copyright 2015 The PDFium Authors. All rights reserved.
3# Use of this source code is governed by a BSD-style license that can be
4# found in the LICENSE file.
5
6import difflib
7import sys
8
9def main(argv):
10  if len(argv) != 3:
11     print '%s: invalid arguments' % argv[0]
12     return 2
13  filename1 = argv[1]
14  filename2 = argv[2]
15  try:
16    with open(filename1, "r") as f1:
17      str1 = f1.readlines();
18    with open(filename2, "r") as f2:
19      str2 = f2.readlines();
20    diffs = difflib.unified_diff(
21        str1, str2, fromfile=filename1, tofile=filename2)
22  except Exception as e:
23    print "something went astray: %s" % e
24    return 1
25  status_code = 0
26  for diff in diffs:
27    sys.stdout.write(diff)
28    status_code = 1
29  return status_code
30
31if __name__ == '__main__':
32  sys.exit(main(sys.argv))
33