Runs the configuration step for the specified sub-command.

def _run_configure(subcmd, args):
    """Runs the configuration step for the specified sub-command.
    """
    maps = {
        "packages": _conf_packages
        }
    if subcmd in maps:
        maps[subcmd](args)
    else:
        msg.warn("'configure' sub-command {} is not supported.".format(subcmd))