def METHOD_NAME(self, build_all=True):
    self._main = {}
    if os.path.exists(self.main_conf_path) == False:
        shutil.copy(
            os.path.join(constants.packagedir, "cravat.yml"), self.main_conf_path
        )
    self._main = au.load_yml_conf(self.main_conf_path)
    conf_modified = False
    k = "multicore_mapper_mode"
    if k not in self._main:
        self._main[k] = constants.default_multicore_mapper_mode
    if build_all:
        self._build_all()