deploy.py 文件源码

def rollback_lambda(name, alias=LIVE):
    all_versions = _versions(name)
    live_version = _get_version(name, alias)
    try:
        live_index = all_versions.index(live_version)
        if live_index < 1:
            raise RuntimeError('Cannot find previous version')
        prev_version = all_versions[live_index - 1]
        logger.info('rolling back to version {}'.format(prev_version))
        _function_alias(name, prev_version)
    except RuntimeError as error:
        logger.error('Unable to rollback. {}'.format(repr(error)))