def parse_command_line(self):
        """Parse the setup script's command line, taken from the
        'script_args' instance attribute (which defaults to 'sys.argv[1:]'
        -- see 'setup()' in core.py).  This list is first processed for
        "global options" -- options that set attributes of the Distribution
        instance.  Then, it is alternately scanned for Distutils commands
        and options for that command.  Each new command terminates the
        options for the previous command.  The allowed options for a
        command are determined by the 'user_options' attribute of the
        command class -- thus, we have to be able to load command classes
        in order to parse the command line.  Any error in that 'options'
        attribute raises DistutilsGetoptError; any error on the
        command-line raises DistutilsArgError.  If no Distutils commands
        were found on the command line, raises DistutilsArgError.  Return
        true if command-line was successfully parsed and we should carry
        on with executing commands; false if no errors but we shouldn't
        execute commands (currently, this only happens if user asks for
        help).
        """
        #
        # We now have enough information to show the Macintosh dialog
        # that allows the user to interactively specify the "command line".
        #
        toplevel_options = self._get_toplevel_options()

        # We have to parse the command line a bit at a time -- global
        # options, then the first command, then its options, and so on --
        # because each command will be handled by a different class, and
        # the options that are valid for a particular class aren't known
        # until we have loaded the command class, which doesn't happen
        # until we know what the command is.

        self.commands = []
        parser = FancyGetopt(toplevel_options + self.display_options)
        parser.set_negative_aliases(self.negative_opt)
        parser.set_aliases({'licence': 'license'})
        args = parser.getopt(args=self.script_args, object=self)
        option_order = parser.get_option_order()
        logging.getLogger().setLevel(logging.WARN - 10 * self.verbose)

        # for display options we return immediately
        if self.handle_display_options(option_order):
            return
        while args:
            args = self._parse_command_opts(parser, args)
            if args is None:  # user asked for help (and got it)
                return

        # Handle the cases of --help as a "global" option, ie.
        # "setup.py --help" and "setup.py --help command ...".  For the
        # former, we show global options (--verbose, --dry-run, etc.)
        # and display-only options (--name, --version, etc.); for the
        # latter, we omit the display-only options and show help for
        # each command listed on the command line.
        if self.help:
            self._show_help(
                parser, display_options=len(self.commands) == 0, commands=self.commands
            )
            return

        # Oops, no commands found -- an end-user error
        if not self.commands:
            raise DistutilsArgError("no commands supplied")

        # All is well: return true
        return True
Parse the setup script's command line, taken from the
        'script_args' instance attribute (which defaults to 'sys.argv[1:]'
        -- see 'setup()' in core.py).  This list is first processed for
        "global options" -- options that set attributes of the Distribution
        instance.  Then, it is alternately scanned for Distutils commands
        and options for that command.  Each new command terminates the
        options for the previous command.  The allowed options for a
        command are determined by the 'user_options' attribute of the
        command class -- thus, we have to be able to load command classes
        in order to parse the command line.  Any error in that 'options'
        attribute raises DistutilsGetoptError; any error on the
        command-line raises DistutilsArgError.  If no Distutils commands
        were found on the command line, raises DistutilsArgError.  Return
        true if command-line was successfully parsed and we should carry
        on with executing commands; false if no errors but we shouldn't
        execute commands (currently, this only happens if user asks for
        help).
        
product/gradle-plugin/src/main/python/setuptools/_distutils/dist.py