auth_plugin.py 文件源码

def discover_auth_systems():
    """Discover the available auth-systems.

    This won't take into account the old style auth-systems.
    """
    ep_name = 'openstack.client.auth_plugin'
    for ep in pkg_resources.iter_entry_points(ep_name):
        try:
            auth_plugin = ep.load()
        except (ImportError, pkg_resources.UnknownExtra, AttributeError) as e:
            logger.debug("ERROR: Cannot load auth plugin %s" % ep.name)
            logger.debug(e, exc_info=1)
        else:
            _discovered_plugins[ep.name] = auth_plugin