def load_plugin_from_args(args):
"""Load required plugin and populate it with options.
Try to guess auth system if it is not specified. Systems are tried in
alphabetical order.
:type args: argparse.Namespace
:raises: AuthorizationFailure
"""
auth_system = args.os_auth_system
if auth_system:
plugin = load_plugin(auth_system)
plugin.parse_opts(args)
plugin.sufficient_options()
return plugin
for plugin_auth_system in sorted(six.iterkeys(_discovered_plugins)):
plugin_class = _discovered_plugins[plugin_auth_system]
plugin = plugin_class()
plugin.parse_opts(args)
try:
plugin.sufficient_options()
except exceptions.AuthPluginOptionsMissing:
continue
return plugin
raise exceptions.AuthPluginOptionsMissing(["auth_system"])
def sufficient_options(self):
"""Check if all required options are present.
:raises: AuthPluginOptionsMissing
"""
has_token = self.opts.get('token')
has_project_domain_or_tenant = (self.opts.get('project_id') or
(self.opts.get('project_name') and
(self.opts.get('user_domain_name')
or self.opts.get('user_domain_id')))
or (self.opts.get('tenant_id')
or self.opts.get('tenant_name')))
has_credential = (self.opts.get('username')
and has_project_domain_or_tenant
and self.opts.get('password')
and self.opts.get('auth_url'))
missing = not (has_token or has_credential)
if missing:
missing_opts = []
opts = [
'token', 'endpoint', 'username', 'password', 'auth_url',
'tenant_id', 'tenant_name'
]
for opt in opts:
if not self.opts.get(opt):
missing_opts.append(opt)
raise exceptions.AuthPluginOptionsMissing(missing_opts)
def sufficient_options(self):
"""Check if all required options are present.
:raises: AuthPluginOptionsMissing
"""
missing = [opt for opt in self.opt_names if not self.opts.get(opt)]
if missing:
raise exceptions.AuthPluginOptionsMissing(missing)