Add --transitive flag.

gclient_utils.py

 # 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.
 
 """Generic utils."""
 
 import errno
 import logging
 import os
 import Queue
@@ skipping 94 matching lines @@
     # Make sure ssh://user-name@example.com/~/test.git@stable works
     regex = r'(ssh://(?:[-\w]+@)?[-\w:\.]+/[-~\w\./]+)(?:@(.+))?'
     components = re.search(regex, url).groups()
   else:
     components = url.split('@', 1)
     if len(components) == 1:
       components += [None]
   return tuple(components)
 
 
+def IsDateRevision(revision):
+  """Returns true if the given revision is of the form "{ ... }"."""
+  return bool(revision and re.match(r'^\{.+\}$', str(revision)))
+
+
+def MakeDateRevision(date):
+  """Returns a revision representing the latest revision before the given
+  date."""
+  return "{" + date + "}"
+
+
 def SyntaxErrorToError(filename, e):
   """Raises a gclient_utils.Error exception with the human readable message"""
   try:
     # Try to construct a human readable error message
     if filename:
       error_message = 'There is a syntax error in %s\n' % filename
     else:
       error_message = 'There is a syntax error\n'
     error_message += 'Line #%s, character %s: "%s"' % (
         e.lineno, e.offset, re.sub(r'[\r\n]*$', '', e.text))
@@ skipping 553 matching lines @@
         logging.info('Caught exception in thread %s' % self.item.name)
         logging.info(str(sys.exc_info()))
         work_queue.exceptions.put(sys.exc_info())
       logging.info('Task %s done' % self.item.name)
 
       work_queue.ready_cond.acquire()
       try:
         work_queue.ready_cond.notifyAll()
       finally:
         work_queue.ready_cond.release()