Refactor git_common config and die

git_rebase_update.py

 #!/usr/bin/env python
 # Copyright 2014 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.
 
 """
 Tool to update all branches to have the latest changes from their upstreams.
 """
 
 import argparse
@@ skipping 13 matching lines @@
 STARTING_WORKDIR_KEY = 'depot-tools.rebase-update.starting-workdir'
 
 
 def find_return_branch_workdir():
   """Finds the branch and working directory which we should return to after
   rebase-update completes.
 
   These values may persist across multiple invocations of rebase-update, if
   rebase-update runs into a conflict mid-way.
   """
-  return_branch = git.config(STARTING_BRANCH_KEY)
-  workdir = git.config(STARTING_WORKDIR_KEY)
+  return_branch = git.get_config(STARTING_BRANCH_KEY)
+  workdir = git.get_config(STARTING_WORKDIR_KEY)
   if not return_branch:
     workdir = os.getcwd()
     git.set_config(STARTING_WORKDIR_KEY, workdir)
     return_branch = git.current_branch()
     if return_branch != 'HEAD':
       git.set_config(STARTING_BRANCH_KEY, return_branch)
 
   return return_branch, workdir
 
 
 def fetch_remotes(branch_tree):
   """Fetches all remotes which are needed to update |branch_tree|."""
   fetch_tags = False
   remotes = set()
   tag_set = git.tags()
   fetchspec_map = {}
-  all_fetchspec_configs = git.config_regexp(r'^remote\..*\.fetch')
+  all_fetchspec_configs = git.get_config_regexp(r'^remote\..*\.fetch')
   for fetchspec_config in all_fetchspec_configs:
     key, _, fetchspec = fetchspec_config.partition(' ')
     dest_spec = fetchspec.partition(':')[2]
     remote_name = key.split('.')[1]
     fetchspec_map[dest_spec] = remote_name
   for parent in branch_tree.itervalues():
     if parent in tag_set:
       fetch_tags = True
     else:
       full_ref = git.run('rev-parse', '--symbolic-full-name', parent)
@@ skipping 255 matching lines @@
 
   return retcode
 
 
 if __name__ == '__main__':  # pragma: no cover
   try:
     sys.exit(main())
   except KeyboardInterrupt:
     sys.stderr.write('interrupted\n')
     sys.exit(1)