When a DEPS file is modified, run gclient sync.

apply_issue.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.
 
 """Applies an issue from Rietveld.
 """
 
 import getpass
 import logging
 import optparse
 import os
+import subprocess
 import sys
 import urllib2
 
 import breakpad  # pylint: disable=W0611
 
 import checkout
 import fix_encoding
+import gclient_utils
 import rietveld
 import scm
 
 
 def main():
   parser = optparse.OptionParser(description=sys.modules[__name__].__doc__)
   parser.add_option(
       '-v', '--verbose', action='count', default=0,
       help='Prints debugging infos')
   parser.add_option(
@@ skipping 72 matching lines @@
     # http://src.chromium.org/viewvc/chrome/trunk/tools/build/scripts/slave/
     #    chromium_commands.py?view=markup
     open('.buildbot-patched', 'w').close()
 
   # Apply the patch.
   try:
     scm_obj.apply_patch(patchset)
   except checkout.PatchApplicationFailed, e:
     print >> sys.stderr, str(e)
     return 1
+
+  if 'DEPS' in map(os.path.basename, patchset.filenames):
+    gclient_root = gclient_utils.FindGclientRoot(options.root_dir)
+    if gclient_root and scm_type:
+      print(
+          'A DEPS file was updated inside a gclient checkout, running gclient '
+          'sync.')
+      base_rev = 'BASE' if scm_type == 'svn' else 'HEAD'
+      return subprocess.call(
+          ['gclient', 'sync', '--revision', base_rev], cwd=gclient_root)
   return 0
 
 
 if __name__ == "__main__":
   fix_encoding.fix_encoding()
   sys.exit(main())