code: def main():
      
      # Initialize logging to the terminal and system log.
      coloredlogs.install(syslog=True)
      # Parse the command line arguments.
      context_opts = {}
      program_opts = {}
      try:
          options, arguments = getopt.getopt(sys.argv[1:], 'fur:vqh', [
              'force', 'use-sudo', 'remote-host=',
              'verbose', 'quiet', 'help',
          ])
          for option, value in options:
              if option in ('-f', '--force'):
                  program_opts['force'] = True
              elif option in ('-u', '--use-sudo'):
                  context_opts['sudo'] = True
              elif option in ('-r', '--remote-host'):
                  context_opts['ssh_alias'] = value
              elif option in ('-v', '--verbose'):
                  coloredlogs.increase_verbosity()
              elif option in ('-q', '--quiet'):
                  coloredlogs.decrease_verbosity()
              elif option in ('-h', '--help'):
                  usage(__doc__)
                  sys.exit(0)
              else:
                  # Programming error...
                  assert False, "Unhandled option!"
          if not arguments:
              usage(__doc__)
              sys.exit(0)
          if len(arguments) != 1:
              raise Exception("Expected a filename as the first and only argument!")
          program_opts['filename'] = arguments[0]
      except Exception as e:
          warning("Error: %s", e)
          sys.exit(1)
      # Run the program.
      try:
          # Initialize the execution context.
          program_opts['context'] = create_context(**context_opts)
          # Initialize the program and update the file.
          UpdateDotDee(**program_opts).update_file()
      except Exception as e:
          logger.exception("Encountered unexpected exception, aborting!")
          sys.exit(1)
docs: Command line interface for the ``update-dotdee`` program.