code: def _cmdline(argv=None):
      
      parser = ArgumentParser()
      parser.add_argument("--checkout", default="HEAD",
                          help="branch, tag, or commit to use [HEAD]")
      parser.add_argument("--name", default=_NAME,
                          help="application name [{:s}]".format(_NAME))
      parser.add_argument("--repo", default=_REPO,
                          help="source repo [{:s}]".format(_REPO))
      parser.add_argument("--test", action="store_true",
                          help="run test suite after installation")
      parser.add_argument("root", help="installation root")
      return parser.parse_args(argv)
docs: Parse command line arguments.
  
      By default, sys.argv is parsed.