Add a git-drover.

gclient-new-workdir.py

 #!/usr/bin/env python
 # Copyright 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.
 #
 # Usage:
 #    gclient-new-workdir.py <repository> <new_workdir> [<branch>]
 #
 
 import os
 import shutil
 import subprocess
 import sys
 import textwrap
 
+import git_common
+
 
 def print_err(msg):
   print >> sys.stderr, msg
 
 
 def usage(msg=None):
 
   if msg is not None:
     print_err('\n' + textwrap.dedent(msg) + '\n')
     usage_msg = 'Run without arguments to get usage help.'
   else:
     usage_msg = '''\
     usage: %s <repository> <new_workdir>
 
     Clone an existing gclient directory, taking care of all sub-repositories
     Works similarly to 'git new-workdir'.
 
     <repository> should contain a .gclient file
     <new_workdir> must not exist
-    ''' % os.path.basename(sys.argv[0])
+    '''% os.path.basename(sys.argv[0])
 
   print_err(textwrap.dedent(usage_msg))
   sys.exit(1)
 
 
 def parse_options():
   if sys.platform == 'win32':
     usage('This script cannot run on Windows because it uses symlinks.')
 
   if len(sys.argv) != 3:
@@ skipping 17 matching lines @@
   gclient = os.path.join(repository, '.gclient')
   if not os.path.exists(gclient):
     print_err('No .gclient file: ' + gclient)
 
   os.makedirs(new_workdir)
   os.symlink(gclient, os.path.join(new_workdir, '.gclient'))
 
   for root, dirs, _ in os.walk(repository):
     if '.git' in dirs:
       workdir = root.replace(repository, new_workdir, 1)
-      make_workdir(os.path.join(root, '.git'),
-                   os.path.join(workdir, '.git'))
-
-
-def make_workdir(repository, new_workdir):
-  print('Creating: ' + new_workdir)
-  os.makedirs(new_workdir)
-
-  GIT_DIRECTORY_WHITELIST = [
-    'config',
-    'info',
-    'hooks',
-    'logs/refs',
-    'objects',
-    'packed-refs',
-    'refs',
-    'remotes',
-    'rr-cache',
-    'svn'
-  ]
-
-  for entry in GIT_DIRECTORY_WHITELIST:
-    make_symlink(repository, new_workdir, entry)
-
-  shutil.copy2(os.path.join(repository, 'HEAD'),
-               os.path.join(new_workdir, 'HEAD'))
-  subprocess.check_call(['git', 'checkout', '-f'],
-                        cwd=new_workdir.rstrip('.git'))
-
-
-def make_symlink(repository, new_workdir, link):
-  if not os.path.exists(os.path.join(repository, link)):
-    return
-  link_dir = os.path.dirname(os.path.join(new_workdir, link))
-  if not os.path.exists(link_dir):
-    os.makedirs(link_dir)
-  os.symlink(os.path.join(repository, link), os.path.join(new_workdir, link))
+      print('Creating: %s' % workdir)
+      git_common.make_workdir(os.path.join(root, '.git'),
+                              os.path.join(workdir, '.git'))
+      subprocess.check_call(['git', 'checkout', '-f'],
+                            cwd=new_workdir.rstrip('.git'))
 
 
 if __name__ == '__main__':
   sys.exit(main())