Retrieve bleeding edge push revision from trunk commit message.

tools/push-to-trunk/common_includes.py

 #!/usr/bin/env python
 # Copyright 2013 the V8 project authors. All rights reserved.
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #     * Redistributions of source code must retain the above copyright
 #       notice, this list of conditions and the following disclaimer.
 #     * Redistributions in binary form must reproduce the above
 #       copyright notice, this list of conditions and the following
@@ skipping 442 matching lines @@
         print "That was not 'RESOLVED' or 'ABORT'."
       print "> ",
       answer = self.ReadLine()
 
   # Takes a file containing the patch to apply as first argument.
   def ApplyPatch(self, patch_file, reverse_patch=""):
     args = "apply --index --reject %s \"%s\"" % (reverse_patch, patch_file)
     if self.Git(args) is None:
       self.WaitForResolvingConflicts(patch_file)
 
+  def FindLastTrunkPush(self):
+    push_pattern = "^Version [[:digit:]]*\.[[:digit:]]*\.[[:digit:]]* (based"
+    args = "log -1 --format=%%H --grep=\"%s\" svn/trunk" % push_pattern
+    return self.Git(args).strip()
+
 
 class UploadStep(Step):
   MESSAGE = "Upload for code review."
 
   def RunStep(self):
     if self._options.reviewer:
       print "Using account %s for review." % self._options.reviewer
       reviewer = self._options.reviewer
     else:
       print "Please enter the email address of a V8 reviewer for your patch: ",
@@ skipping 38 matching lines @@
   if options.s == 0 and os.path.exists(state_file):
     os.remove(state_file)
   state = {}
   steps = []
   for (number, step_class) in enumerate(step_classes):
     steps.append(MakeStep(step_class, number, state, config,
                           options, side_effect_handler))
 
   for step in steps[options.s:]:
     step.Run()