docs: def egg_info_writer(cmd, basename, filename):
      # type: (setuptools.command.egg_info.egg_info, str, str) -> None
      """Read rcli configuration and write it out to the egg info.
  
      Args:
          cmd: An egg info command instance to use for writing.
          basename: The basename of the file to write.
          filename: The full path of the file to write into the egg info.
      """
      setupcfg = next((f for f in setuptools.findall()
                       if os.path.basename(f) == 'setup.cfg'), None)
      if not setupcfg:
          return
      parser = six.moves.configparser.ConfigParser()  # type: ignore
      parser.read(setupcfg)
      if not parser.has_section('rcli') or not parser.items('rcli'):
          return
      config = dict(parser.items('rcli'))  # type: typing.Dict[str, typing.Any]
      for k, v in six.iteritems(config):
          if v.lower() in ('y', 'yes', 'true'):
              config[k] = True
          elif v.lower() in ('n', 'no', 'false'):
              config[k] = False
          else:
              try:
                  config[k] = json.loads(v)
              except ValueError:
                  pass
      cmd.write_file(basename, filename, json.dumps(config))