Adding 'git cl format' command for clang-format.

git_cl.py

 #!/usr/bin/env python
 # Copyright (c) 2012 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.
 
 # Copyright (C) 2008 Evan Martin <martine@danga.com>
 
 """A git-command for integrating reviews on Rietveld."""
 
 import json
@@ skipping 1913 matching lines @@
   _, args = parser.parse_args(args)
   if args:
     parser.error('Unrecognized args: %s' % ' '.join(args))
   cl = Changelist()
   # Ensure there actually is an issue to close.
   cl.GetDescription()
   cl.CloseIssue()
   return 0
 
 
+def CMDformat(parser, args):
+  """run clang-format on the diff"""
+  CLANG_EXTS = ['.cc', '.cpp', '.h']
+  parser.add_option('--full', action='store_true', default=False)
+  opts, args = parser.parse_args(args)
+  if args:
+    parser.error('Unrecognized args: %s' % ' '.join(args))
+
+  if opts.full:
+    cmd = ['diff', '--name-only', '--'] + ['.*' + ext for ext in CLANG_EXTS]
+    files = RunGit(cmd).split()
+    if not files:
+      print "Nothing to format."
+      return 0
+    RunCommand(['clang-format', '-i'] + files)
+  else:
+    cfd_path = os.path.join('/usr', 'lib', 'clang-format',
+                            'clang-format-diff.py')
+    if not os.path.exists(cfd_path):
+      print >> sys.stderr, 'Could not find clang-format-diff at %s.' % cfd_path
+      return 2
+    cmd = ['diff', '-U0', '@{u}', '--'] + ['.*' + ext for ext in CLANG_EXTS]
+    diff = RunGit(cmd)
+    cmd = [sys.executable, '/usr/lib/clang-format/clang-format-diff.py',

[Jiang, 2013/05/06 19:27:31]

Why don't you use cfd_path here?

+           '-style', 'Chromium']
+    RunCommand(cmd, stdin=diff)
+
+  return 0
+
+
 def Command(name):
   return getattr(sys.modules[__name__], 'CMD' + name, None)
 
 
 def CMDhelp(parser, args):
   """print list of commands or help for a specific command"""
   _, args = parser.parse_args(args)
   if len(args) == 1:
     return main(args + ['--help'])
   parser.print_help()
@@ skipping 61 matching lines @@
              'and retry or visit go/isgaeup.\n%s') % (e.code, str(e)))
 
   # Not a known command. Default to help.
   GenUsage(parser, 'help')
   return CMDhelp(parser, argv)
 
 
 if __name__ == '__main__':
   fix_encoding.fix_encoding()
   sys.exit(main(sys.argv[1:]))