Import portage when it's used to fix broken tree.

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
 import gflags
 import os
 import re
 import shutil
 import subprocess
 import sys
-from portage.versions import pkgsplit, pkgsplit, vercmp
 
 sys.path.append(os.path.join(os.path.dirname(__file__), 'lib'))
 from cros_build_lib import Info, RunCommand, Warning, Die
 
 
 gflags.DEFINE_string('board', 'x86-generic',
                      'Board for which the package belongs.', short_name='b')
 gflags.DEFINE_string('commit_ids', '',
                      """Optional list of commit ids for each package.
                      This list must either be empty or have the same length as
@@ skipping 39 matching lines @@
 
 
 def _Print(message):
   """Verbose print function."""
   if gflags.FLAGS.verbose:
     Info(message)
 
 
 def _BestEBuild(ebuilds):
   """Returns the newest EBuild from a list of EBuild objects."""
+  from portage.versions import vercmp
   winner = ebuilds[0]
   for ebuild in ebuilds[1:]:
     if vercmp(winner.version, ebuild.version) < 0:
       winner = ebuild
   return winner
 
 
 def _FindStableEBuilds(files):
   """Return a list of stable ebuilds from specified list of files.
 
@@ skipping 185 matching lines @@
 
 class _EBuild(object):
   """Wrapper class for an ebuild."""
 
   def __init__(self, path):
     """Initializes all data about an ebuild.
 
     Uses equery to find the ebuild path and sets data about an ebuild for
     easy reference.
     """
+    from portage.versions import pkgsplit
     self.ebuild_path = path
     (self.ebuild_path_no_revision,
      self.ebuild_path_no_version,
      self.current_revision) = self._ParseEBuildPath(self.ebuild_path)
     _, self.category, pkgpath, filename = path.rsplit('/', 3)
     filename_no_suffix = os.path.join(filename.replace('.ebuild', ''))
     self.pkgname, version_no_rev, rev = pkgsplit(filename_no_suffix)
     self.version = '%s-%s' % (version_no_rev, rev)
     self.package = '%s/%s' % (self.category, self.pkgname)
     self.is_workon = False
@@ skipping 212 matching lines @@
         except (OSError, IOError):
           Warning('Cannot rev %s\n' % ebuild.package,
                   'Note you will have to go into %s '
                   'and reset the git repo yourself.' % overlay)
           raise
 
 
 if __name__ == '__main__':
   main(sys.argv)