Expand the ~ character in link_names of symlink.py

build/symlink.py

 #!/usr/bin/env python
 # Copyright (c) 2013 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
-"""Make a symlink and optionally touch a file (to handle dependencies)."""
+"""Make a symlink and optionally touch a file (to handle dependencies).
 
+Usage:
+  symlink.py [options] sources... target
+
+A sym link to source is created at target. If multiple sources are specfied,
+then target is assumed to be a directory, and will contain all the links to
+the sources (basenames identical to their source).
+"""
 
 import errno
 import optparse
 import os.path
 import shutil
 import sys
 
 
 def Main(argv):
   parser = optparse.OptionParser()
   parser.add_option('-f', '--force', action='store_true')
   parser.add_option('--touch')
 
   options, args = parser.parse_args(argv[1:])
   if len(args) < 2:
     parser.error('at least two arguments required.')
 
   target = args[-1]
   sources = args[:-1]
   for s in sources:
     t = os.path.join(target, os.path.basename(s))
     if len(sources) == 1 and not os.path.isdir(target):
       t = target
+    t = os.path.expanduser(t)
     if os.path.realpath(t) == s:
       continue
     try:
       os.symlink(s, t)
     except OSError, e:
       if e.errno == errno.EEXIST and options.force:
         if os.path.isdir(t):
           shutil.rmtree(t, ignore_errors=True)
         else:
           os.remove(t)
         os.symlink(s, t)
       else:
         raise
 
 
   if options.touch:
     with open(options.touch, 'w') as f:
       pass
 
 
 if __name__ == '__main__':
   sys.exit(Main(sys.argv))