'[optionally] copy default config files into profile dir.'

def init_config_files(self):

    self.config_file_paths.extend(ENV_CONFIG_DIRS)
    self.config_file_paths.extend(SYSTEM_CONFIG_DIRS)
    path = self.builtin_profile_dir
    if self.copy_config_files:
        src = self.profile
        cfg = self.config_file_name
        if (path and os.path.exists(os.path.join(path, cfg))):
            self.log.warning(('Staging    %r    from    %s    into    %r    [overwrite=%s]' % (cfg, src, self.profile_dir.location, self.overwrite)))
            self.profile_dir.copy_config_file(cfg, path=path, overwrite=self.overwrite)
        else:
            self.stage_default_config_file()
    else:
        files = glob.glob(os.path.join(path, '*.py'))
        for fullpath in files:
            cfg = os.path.basename(fullpath)
            if self.profile_dir.copy_config_file(cfg, path=path, overwrite=False):
                self.log.warning(('Staging    bundled    %s    from    %s    into    %r' % (cfg, self.profile, self.profile_dir.location)))
