def fetch_es_repo():
    # user is manually setting YAML dir, don't tamper with it
    if 'TEST_ES_YAML_DIR' in environ:
        return

    repo_path = environ.get(
        'TEST_ES_REPO',
        abspath(join(dirname(__file__), pardir, pardir, 'elasticsearch'))
    )

    # no repo
    if not exists(repo_path) or not exists(join(repo_path, '.git')):
        print('No elasticsearch repo found...')
        # set YAML DIR to empty to skip yaml tests
        environ['TEST_ES_YAML_DIR'] = ''
        return

    # set YAML test dir
    environ['TEST_ES_YAML_DIR'] = join(repo_path, 'rest-api-spec', 'src', 'main', 'resources', 'rest-api-spec', 'test')

    # fetching of yaml tests disabled, we'll run with what's there
    if environ.get('TEST_ES_NOFETCH', False):
        return

    from test_elasticsearch.test_server import get_client
    from test_elasticsearch.test_cases import SkipTest

    # find out the sha of the running es
    try:
        es = get_client()
        sha = es.info()['version']['build_hash']
    except (SkipTest, KeyError):
        print('No running elasticsearch >1.X server...')
        return

    # fetch new commits to be sure...
    print('Fetching elasticsearch repo...')
    subprocess.check_call(repo_path % 'cd %s && git fetch https://github.com/elasticsearch/elasticsearch.git', shell=True)
    # reset to the version fron info()
    subprocess.check_call('cd %s && git reset --hard %s' % (repo_path, sha), shell=True)
dataset/ETHPy150Open elastic/elasticsearch-py/test_elasticsearch/run_tests.py/fetch_es_repo/swapped operands of `%`