fabfile.py 文件源码

def install_requirements():
    require('srvr', 'path', 'within_virtualenv', provided_by=env.servers)

    reqs = 'requirements-{}.txt'.format(env.srvr)

    try:
        assert os.path.exists(reqs)
    except AssertionError:
        reqs = 'requirements.txt'

    with cd(env.path), prefix(env.within_virtualenv):
        run('pip install -U -r {}'.format(reqs))