Add --reset option to gclient sync for git

gclient.py

 #!/usr/bin/python
 # Copyright (c) 2010 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.
 
 """A wrapper script to manage a set of client modules in different SCM.
 
 This script is intended to be used to help basic management of client
 program sources residing in one or more Subversion modules and Git
 repositories, along with other modules it depends on, also in Subversion or Git,
@@ skipping 107 matching lines @@
 
 usage: gclient %(cmd)s [options] [--] [SCM update options/args]
 
 Valid options:
   --force                 : force update even for unchanged modules
   --nohooks               : don't run the hooks after the update is complete
   --revision SOLUTION@REV : update given solution to specified revision
   --deps PLATFORM(S)      : sync deps for the given platform(s), or 'all'
   --verbose               : output additional diagnostics
   --head                  : update to latest revision, instead of last good revision
+  --reset                 : resets any local changes before updating (git only)
 
 Examples:
   gclient %(cmd)s
       update files from SCM according to current configuration,
       *for modules which have changed since last update or sync*
   gclient %(cmd)s --force
       update files from SCM according to current configuration, for
       all modules (useful for recovering files deleted from local copy)
   gclient %(cmd)s --revision src@31000
       update src directory to r31000
@@ skipping 984 matching lines @@
                            metavar="REV", default=[],
                            help=("(update/sync only) sync to a specific "
                                  "revision, can be used multiple times for "
                                  "each solution, e.g. --revision=src@123, "
                                  "--revision=internal@32"))
   option_parser.add_option("", "--deps", default=None, dest="deps_os",
                            metavar="OS_LIST",
                            help=("(update/sync only) sync deps for the "
                                  "specified (comma-separated) platform(s); "
                                  "'all' will sync all platforms"))
+  option_parser.add_option("", "--reset", action="store_true", default=False,
+                           help=("(update/sync only) resets any local changes "
+                                 "before updating (git only)"))
   option_parser.add_option("", "--spec", default=None,
                            help=("(config only) create a gclient file "
                                  "containing the provided string"))
   option_parser.add_option("-v", "--verbose", action="count", default=0,
                            help="produce additional output for diagnostics")
   option_parser.add_option("", "--manually_grab_svn_rev", action="store_true",
                            default=False,
                            help="Skip svn up whenever possible by requesting "
                                 "actual HEAD revision from the repository")
   option_parser.add_option("", "--head", action="store_true", default=False,
@@ skipping 38 matching lines @@
 
 if "__main__" == __name__:
   try:
     result = Main(sys.argv)
   except gclient_utils.Error, e:
     print >> sys.stderr, "Error: %s" % str(e)
     result = 1
   sys.exit(result)
 
 # vim: ts=2:sw=2:tw=80:et: