Migrate and merge logging_utils from swarming_bot into client/utils.

client/auth.py

 #!/usr/bin/env python
 # Copyright 2013 The Swarming Authors. All rights reserved.
 # Use of this source code is governed under the Apache License, Version 2.0 that
 # can be found in the LICENSE file.
 
 """Client tool to perform various authentication related tasks."""
 
 __version__ = '0.4'
 
 import logging
 import optparse
 import sys
 
 from third_party import colorama
 from third_party.depot_tools import fix_encoding
 from third_party.depot_tools import subcommand
 
+from utils import logging_utils
 from utils import on_error
 from utils import net
 from utils import oauth
 from utils import tools
 
 
 class AuthServiceError(Exception):
   """Unexpected response from authentication service."""
 
 
@@ skipping 101 matching lines @@
 def CMDcheck(parser, args):
   """Shows identity associated with currently cached auth token/cookie."""
   (options, args) = parser.parse_args(args)
   process_auth_options(parser, options)
   service = AuthService(options.service)
   service.login(False)
   print service.get_current_identity()
   return 0
 
 
-class OptionParserAuth(tools.OptionParserWithLogging):
+class OptionParserAuth(logging_utils.OptionParserWithLogging):
   def __init__(self, **kwargs):
-    tools.OptionParserWithLogging.__init__(self, prog='auth.py', **kwargs)
+    logging_utils.OptionParserWithLogging.__init__(
+        self, prog='auth.py', **kwargs)
     self.server_group = tools.optparse.OptionGroup(self, 'Server')
     self.server_group.add_option(
         '-S', '--service',
         metavar='URL', default='',
         help='Service to use')
     self.add_option_group(self.server_group)
     add_auth_options(self)
 
   def parse_args(self, *args, **kwargs):
-    options, args = tools.OptionParserWithLogging.parse_args(
+    options, args = logging_utils.OptionParserWithLogging.parse_args(
         self, *args, **kwargs)
     options.service = options.service.rstrip('/')
     if not options.service:
       self.error('--service is required.')
     on_error.report_on_exception_exit(options.service)
     return options, args
 
 
 def main(args):
   dispatcher = subcommand.CommandDispatcher(__name__)
   return dispatcher.execute(OptionParserAuth(version=__version__), args)
 
 
 if __name__ == '__main__':
   fix_encoding.fix_encoding()
   tools.disable_buffering()
   colorama.init()
   sys.exit(main(sys.argv[1:]))