def init_argparser_working_dir(
            self, argparser,
            explanation='',
            help_template=(
                'the working directory; %(explanation)s'
                'default is current working directory (%(cwd)s)'),
            ):
        """
        Subclass could an extra expanation on how this is used.

        Arguments

        explanation
            Explanation text for the default help template
        help_template
            A standard help message for this option.
        """

        cwd = self.toolchain.join_cwd()
        argparser.add_argument(
            '--working-dir', dest=WORKING_DIR,
            metavar=metavar(WORKING_DIR),
            default=cwd,
            help=help_template % {'explanation': explanation, 'cwd': cwd},
        )