Refactor the way that git executables are launched in depot tools.

gitscripts/git_cl.py

 #!/usr/bin/env python
 # Copyright (c) 2012 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.
 
 # Copyright (C) 2008 Evan Martin <martine@danga.com>
 
 """A git-command for integrating reviews on Rietveld."""
 
 from distutils.version import LooseVersion
@@ skipping 23 matching lines @@
 import breakpad  # pylint: disable=W0611
 import clang_format
 import fix_encoding
 import gclient_utils
 import presubmit_support
 import rietveld
 import scm
 import subcommand
 import subprocess2
 import watchlists
 import owners_finder

[agable, 2014/03/06 18:02:20]

Just confirming that all these rely on depot_tools being in pythonpath, so none
of these imports break.

 
 __version__ = '1.0'
 
 DEFAULT_SERVER = 'https://codereview.appspot.com'
 POSTUPSTREAM_HOOK_PATTERN = '.git/hooks/post-cl-%s'
 DESCRIPTION_BACKUP_FILE = '~/.git_cl_description_backup'
 GIT_INSTRUCTIONS_URL = 'http://code.google.com/p/chromium/wiki/UsingGit'
 CHANGE_ID = 'Change-Id:'
 
 # Shortcut since it quickly becomes redundant.
@@ skipping 2406 matching lines @@
         ('AppEngine is misbehaving and returned HTTP %d, again. Keep faith '
           'and retry or visit go/isgaeup.\n%s') % (e.code, str(e)))
 
 
 if __name__ == '__main__':
   # These affect sys.stdout so do it outside of main() to simplify mocks in
   # unit testing.
   fix_encoding.fix_encoding()
   colorama.init()
   sys.exit(main(sys.argv[1:]))