gclient: Make revinfo work on git.

gclient_scm.py

 # Copyright 2009 Google Inc.  All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
 # You may obtain a copy of the License at
 #
 #      http://www.apache.org/licenses/LICENSE-2.0
 #
 # Unless required by applicable law or agreed to in writing, software
 # distributed under the License is distributed on an "AS IS" BASIS,
@@ skipping 60 matching lines @@
 
   def FullUrlForRelativeUrl(self, url):
     # Find the forth '/' and strip from there. A bit hackish.
     return '/'.join(self.url.split('/')[:4]) + url
 
   def RunCommand(self, command, options, args, file_list=None):
     # file_list will have all files that are modified appended to it.
     if file_list is None:
       file_list = []
 
-    commands = ['cleanup', 'export', 'update', 'revert',
+    commands = ['cleanup', 'export', 'update', 'revert', 'revinfo',
                 'status', 'diff', 'pack', 'runhooks']
 
     if not command in commands:
       raise gclient_utils.Error('Unknown command %s' % command)
 
     if not command in dir(self):
       raise gclient_utils.Error('Command %s not implemnted in %s wrapper' % (
           command, self.scm_name))
 
     return getattr(self, command)(options, args, file_list)
@@ skipping 68 matching lines @@
       # revert won't work if the directory doesn't exist. It needs to
       # checkout instead.
       print("\n_____ %s is missing, synching instead" % self.relpath)
       # Don't reuse the args.
       return self.update(options, [], file_list)
     merge_base = self._RunGit(['merge-base', 'HEAD', 'origin'])
     files = self._RunGit(['diff', merge_base, '--name-only']).split()
     self._RunGit(['reset', '--hard', merge_base], redirect_stdout=False)
     file_list.extend([os.path.join(self.checkout_path, f) for f in files])
 
+  def revinfo(self, options, args, file_list):
+    """Display revision"""
+    return self._RunGit(['rev-parse', 'HEAD'])
+
   def runhooks(self, options, args, file_list):
     self.status(options, args, file_list)
 
   def status(self, options, args, file_list):
     """Display status information."""
     if not os.path.isdir(self.checkout_path):
       print('\n________ couldn\'t run status in %s:\nThe directory '
             'does not exist.' % checkout_path)
     else:
       merge_base = self._RunGit(['merge-base', 'HEAD', 'origin'])
@@ skipping 208 matching lines @@
     try:
       # svn revert is so broken we don't even use it. Using
       # "svn up --revision BASE" achieve the same effect.
       RunSVNAndGetFileList(options, ['update', '--revision', 'BASE'], path,
                            file_list)
     except OSError, e:
       # Maybe the directory disapeared meanwhile. We don't want it to throw an
       # exception.
       logging.error('Failed to update:\n%s' % str(e))
 
+  def revinfo(self, options, args, file_list):
+    """Display revision"""
+    return CaptureSVNHeadRevision(self.url)
+
   def runhooks(self, options, args, file_list):
     self.status(options, args, file_list)
 
   def status(self, options, args, file_list):
     """Display status information."""
     path = os.path.join(self._root_dir, self.relpath)
     command = ['status']
     command.extend(args)
     if not os.path.isdir(path):
       # svn status won't work if the directory doesn't exist.
@@ skipping 361 matching lines @@
         # Col 3
         if wc_status[0].getAttribute('copied') == 'true':
           statuses[3] = '+'
         # Col 4
         if wc_status[0].getAttribute('switched') == 'true':
           statuses[4] = 'S'
         # TODO(maruel): Col 5 and 6
         item = (''.join(statuses), file)
         results.append(item)
   return results