old_contents: from flow.configuration import defaults
  from flow.configuration.commands import determine_command
  from flow.configuration.inject.initialize import initialize_injector
  from flow.configuration.metrics import initialize_metrics
  from flow.configuration.parser import parse_arguments
  from flow.configuration.settings.load import load_settings
  
  import flow.exit_codes
  import flow.util.stats
  import logging.config
  import pika
  import signal
  import sys
  import traceback
  
  
  LOG = logging.getLogger(__name__)
  
  
  def main():
      try:
          setup_exit_handler(signal.SIGINT, [signal.SIGINT, signal.SIGTERM])
          setup_exit_handler(signal.SIGTERM, [signal.SIGTERM])
  
          exit_code = naked_main()
  
      except SystemExit as e:
          exit_code = e.code
      except:
          sys.stderr.write('Unhandled exception:\n')
          traceback.print_exc()
          exit_code = flow.exit_codes.UNKNOWN_ERROR
  
      return exit_code
  
  
  def setup_exit_handler(signum, child_signals):
      def _handler(signum, frame):
          LOG.critical('Received signal %d: %s', signum, frame)
          exit_process(exit_codes.UNKNOWN_ERROR, child_signals=child_signals)
      signal.signal(signum, _handler)
  
  
  def naked_main():
      command_class = determine_command()
      parsed_args = parse_arguments(command_class)
  
      settings = load_settings(command_class.name, parsed_args)
  
      logging.config.dictConfig(settings.get('logging',
          defaults.DEFAULT_LOGGING_CONFIG))
      initialize_metrics(settings)
  
      injector = initialize_injector(settings, command_class)
  
      flow.util.stats.increment_as_user('command', command_class.name)
  
      # XXX Hack to get the command to show up in the rabbitmq admin interface
      pika.connection.PRODUCT = command_class.name
  
      try:
          LOG.info('Loading command (%s)', command_class.name)
          command = injector.get(command_class)
      except:
          LOG.exception('Could not instantiate command object.')
          return flow.exit_codes.EXECUTE_ERROR
  
      try:
          exit_code = command.execute(parsed_args)
      except:
          LOG.exception('Command execution failed')
          return flow.exit_codes.EXECUTE_FAILURE
  
      return exit_code
  
new_contents: from flow.configuration import defaults
  from flow.configuration.commands import determine_command
  from flow.configuration.inject.initialize import initialize_injector
  from flow.configuration.metrics import initialize_metrics
  from flow.configuration.parser import parse_arguments
  from flow.configuration.settings.load import load_settings
  from flow.util.exit import exit_process
  from flow import exit_codes
  
  import flow.exit_codes
  import flow.util.stats
  import logging.config
  import pika
  import signal
  import sys
  import traceback
  
  
  LOG = logging.getLogger(__name__)
  
  
  def main():
      try:
          setup_exit_handler(signal.SIGINT, [signal.SIGINT, signal.SIGTERM])
          setup_exit_handler(signal.SIGTERM, [signal.SIGTERM])
  
          exit_code = naked_main()
  
      except SystemExit as e:
          exit_code = e.code
      except:
          sys.stderr.write('Unhandled exception:\n')
          traceback.print_exc()
          exit_code = flow.exit_codes.UNKNOWN_ERROR
  
      return exit_code
  
  
  def setup_exit_handler(signum, child_signals):
      def _handler(signum, frame):
          LOG.critical('Received signal %d: %s', signum, frame)
          exit_process(exit_codes.UNKNOWN_ERROR, child_signals=child_signals)
      signal.signal(signum, _handler)
  
  
  def naked_main():
      command_class = determine_command()
      parsed_args = parse_arguments(command_class)
  
      settings = load_settings(command_class.name, parsed_args)
  
      logging.config.dictConfig(settings.get('logging',
          defaults.DEFAULT_LOGGING_CONFIG))
      initialize_metrics(settings)
  
      injector = initialize_injector(settings, command_class)
  
      flow.util.stats.increment_as_user('command', command_class.name)
  
      # XXX Hack to get the command to show up in the rabbitmq admin interface
      pika.connection.PRODUCT = command_class.name
  
      try:
          LOG.info('Loading command (%s)', command_class.name)
          command = injector.get(command_class)
      except:
          LOG.exception('Could not instantiate command object.')
          return flow.exit_codes.EXECUTE_ERROR
  
      try:
          exit_code = command.execute(parsed_args)
      except:
          LOG.exception('Command execution failed')
          return flow.exit_codes.EXECUTE_FAILURE
  
      return exit_code
  
subject: add missing imports