• Home
  • Line#
  • Scopes#
  • Navigate#
  • Raw
  • Download
1#!/usr/bin/env python
2# Copyright (c) 2013 The Chromium 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
6"""Make a symlink and optionally touch a file (to handle dependencies).
7
8Usage:
9  symlink.py [options] sources... target
10
11A sym link to source is created at target. If multiple sources are specfied,
12then target is assumed to be a directory, and will contain all the links to
13the sources (basenames identical to their source).
14"""
15
16import errno
17import optparse
18import os.path
19import shutil
20import sys
21
22
23def Main(argv):
24  parser = optparse.OptionParser()
25  parser.add_option('-f', '--force', action='store_true')
26  parser.add_option('--touch')
27
28  options, args = parser.parse_args(argv[1:])
29  if len(args) < 2:
30    parser.error('at least two arguments required.')
31
32  target = args[-1]
33  sources = args[:-1]
34  for s in sources:
35    t = os.path.join(target, os.path.basename(s))
36    if len(sources) == 1 and not os.path.isdir(target):
37      t = target
38    t = os.path.expanduser(t)
39    if os.path.realpath(t) == s:
40      continue
41    try:
42      os.symlink(s, t)
43    except OSError, e:
44      if e.errno == errno.EEXIST and options.force:
45        if os.path.isdir(t):
46          shutil.rmtree(t, ignore_errors=True)
47        else:
48          os.remove(t)
49        os.symlink(s, t)
50      else:
51        raise
52
53
54  if options.touch:
55    with open(options.touch, 'w') as f:
56      pass
57
58
59if __name__ == '__main__':
60  sys.exit(Main(sys.argv))
61