Fix undefined default_config_path_bak in gsutil config.

third_party/gsutil/gslib/commands/config.py

 # Copyright 2011 Google Inc. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
 # You may obtain a copy of the License at
 #
 #     http://www.apache.org/licenses/LICENSE-2.0
 #
 # Unless required by applicable law or agreed to in writing, software
 # distributed under the License is distributed on an "AS IS" BASIS,
@@ skipping 607 matching lines @@
           try:
             sys.stderr.write(
                 'Backing up existing config file "%s" to "%s"...\n'
                 % (default_config_path, default_config_path_bak))
             os.rename(default_config_path, default_config_path_bak)
           except e:
             raise CommandException('Failed to back up existing config '
                 'file ("%s" -> "%s"): %s.'
                 % (default_config_path, default_config_path_bak, e))
           output_file_name = default_config_path
+    else:
+      default_config_path_bak = None

[Ryan Tseng, 2014/06/23 21:29:22]

Move this before 597 before the if (to make it more obvious it has to exist in
the scope of this function).

 
     if output_file_name == '-':
       output_file = sys.stdout
     else:
       output_file = self._OpenConfigFile(output_file_name)
 
     # Catch ^C so we can restore the backup.
     signal.signal(signal.SIGINT, cleanup_handler)
     try:
       self._WriteBotoConfigFile(output_file, use_oauth2=use_oauth2,
@@ skipping 15 matching lines @@
 
     if output_file_name != '-':
       output_file.close()
       sys.stderr.write(
           '\nBoto config file "%s" created.\n' % output_file_name)
 
     return 0
 
 def cleanup_handler(signalnum, handler):
   raise AbortException('User interrupted config command')