Add support to pushing unstable changes for the chrome pfq.

cros_mark_as_stable.py

 #!/usr/bin/python
 
 # Copyright (c) 2010 The Chromium OS Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 """This module uprevs a given package's ebuild to the next revision."""
 
 
 import fileinput
@@ skipping 378 matching lines @@
 
 class EBuildStableMarker(object):
   """Class that revs the ebuild and commits locally or pushes the change."""
 
   def __init__(self, ebuild):
     assert ebuild
     self._ebuild = ebuild
 
   @classmethod
   def MarkAsStable(cls, unstable_ebuild_path, new_stable_ebuild_path,
-                   commit_keyword, commit_value, redirect_file=None):
+                   commit_keyword, commit_value, redirect_file=None,
+                   make_stable=True):
     """Static function that creates a revved stable ebuild.
 
     This function assumes you have already figured out the name of the new
     stable ebuild path and then creates that file from the given unstable
     ebuild and marks it as stable.  If the commit_value is set, it also
     set the commit_keyword=commit_value pair in the ebuild.
 
     Args:
       unstable_ebuild_path: The path to the unstable ebuild.
       new_stable_ebuild_path:  The path you want to use for the new stable
         ebuild.
       commit_keyword: Optional keyword to set in the ebuild to mark it as
         stable.
       commit_value: Value to set the above keyword to.
       redirect_file:  Optionally redirect output of new ebuild somewhere else.
+      make_stable:  Actually make the ebuild stable.
     """
     shutil.copyfile(unstable_ebuild_path, new_stable_ebuild_path)
     for line in fileinput.input(new_stable_ebuild_path, inplace=1):
       # Has to be done here to get changes to sys.stdout from fileinput.input.
       if not redirect_file:
         redirect_file = sys.stdout
       if line.startswith('KEYWORDS'):
         # Actually mark this file as stable by removing ~'s.
-        redirect_file.write(line.replace('~', ''))
+        if make_stable:
+          redirect_file.write(line.replace('~', ''))
+        else:
+          redirect_file.write(line)
       elif line.startswith('EAPI'):
         # Always add new commit_id after EAPI definition.
         redirect_file.write(line)
         if commit_keyword and commit_value:
           redirect_file.write('%s="%s"\n' % (commit_keyword, commit_value))
       elif not line.startswith(commit_keyword):
         # Skip old commit_keyword definition.
         redirect_file.write(line)
     fileinput.close()
 
@@ skipping 138 matching lines @@
         if gflags.FLAGS.drop_file:
           fh = open(gflags.FLAGS.drop_file, 'w')
           fh.write(' '.join(revved_packages))
           fh.close()
       else:
         work_branch.Delete()
 
 
 if __name__ == '__main__':
   main(sys.argv)