cli.py 文件源码

def _parse_args(self):
        """Setup parser and parse cli arguments.
        NB! counter-intuitively, this function also messes around with logging levels.
        """

        # We want some of our options to take effect as early as possible, as they affect command line parsing.
        # For these options we resort to some ugly, basic argv spotting

        if '--debug' in sys.argv:
            logging.getLogger().setLevel(logging.DEBUG)
            logging.debug('Early debug enabled')

        if '--verbose' in sys.argv or '-v' in sys.argv:
            logging.getLogger().setLevel(logging.INFO)

        autodiscover = False
        if '--autodiscover' in sys.argv:
            logging.debug('Autodiscover enabled')
            autodiscover = True

        parser = SmartCommandMapParser(prog=self.tool_shortname,
                                       description="Cligraphy command line tools",
                                       formatter_class=CustomDescriptionFormatter)

        self.parser = parser  # expose to eg. ctx

        parser.add_argument('--version', action=_VersionAction, nargs=0, dest="_version")
        parser.add_argument("--debug", help="enable debuging output", dest="_level", action="store_const", const=logging.DEBUG)
        parser.add_argument("--pdb", help="run pdb on exceptions", dest="_pdb", action="store_true")
        parser.add_argument("--no-capture", help="disable input/output capture", dest="_capture", action="store_false", default=True)
        parser.add_argument("--no-reporting", help="disable reporting", dest="_reporting", action="store_false", default=True)
        parser.add_argument("--profile", help="enable profiling", dest="_profile", action="store_true", default=False)
        parser.add_argument("--autodiscover", help="re-discover commands and refresh cache (default: read cached commands list)", dest="_autodiscover", action="store_true")
        parser.add_argument("-v", "--verbose", help="enable informational output", dest="_level", action="store_const", const=logging.INFO)

        for namespace, command_map in self.get_command_maps(autodiscover):
            parser.add_command_map(namespace, command_map)

        argcomplete.autocomplete(parser)

        _warn_about_bad_non_ascii_chars(sys.argv)
        _warn_about_bad_path(os.getenv('VIRTUAL_ENV'), os.getenv('PATH'))

        args = parser.parse_args()
        args._parser = parser  # deprecated

        # pylint:disable=protected-access
        if args._level is not None:
            logging.getLogger().setLevel(args._level)

        return args