Allow to use the none auth plugin

This change allows to use the none auth plugin in CLI without having
to specify --os-cloud file with basically a single endpoint parameter.

Closes-Bug: #1724283
Depends-On: I3e477895ba0c989ffd0c91c45791e9f74173a3d6
Depends-On: I3de32193f41d9d1012043b43ae8080f3b1e828e5
Change-Id: I6cf4e22d676f4a55f84863125aee7318915a7404

osc_lib/clientmanager.py

@@ -247,7 +247,8 @@ class ClientManager(object):
     @property
     def auth_ref(self):
         """Dereference will trigger an auth if it hasn't already"""
-        if not self._auth_required:
+        if (not self._auth_required or
+                self._cli_options.config['auth_type'] == 'none'):
             # Forcibly skip auth if we know we do not need it
             return None
         if not self._auth_ref:

osc_lib/tests/test_clientmanager.py

@@ -21,6 +21,7 @@ from keystoneauth1 import exceptions as ksa_exceptions
 from keystoneauth1.identity import generic as generic_plugin
 from keystoneauth1.identity.v3 import k2k
 from keystoneauth1 import loading
+from keystoneauth1 import noauth
 from keystoneauth1 import token_endpoint
 
 try:
@@ -81,6 +82,29 @@ class TestClientCache(utils.TestCase):
 
 class TestClientManager(utils.TestClientManager):
 
+    def test_client_manager_none(self):
+        none_auth = {
+            'endpoint': fakes.AUTH_URL,
+        }
+        client_manager = self._make_clientmanager(
+            auth_args=none_auth,
+            auth_plugin_name='none',
+        )
+
+        self.assertEqual(
+            fakes.AUTH_URL,
+            client_manager._cli_options.config['auth']['endpoint'],
+        )
+        self.assertIsInstance(
+            client_manager.auth,
+            noauth.NoAuth,
+        )
+        # Check that the endpoint option works as the override
+        self.assertEqual(
+            fakes.AUTH_URL,
+            client_manager.get_endpoint_for_service_type('baremetal'),
+        )
+
     def test_client_manager_admin_token(self):
         token_auth = {
             'endpoint': fakes.AUTH_URL,

releasenotes/notes/none-auth-cli-48ab0e48d4852941.yaml

@@ -0,0 +1,7 @@
+---
+fixes:
+  - |
+    It is now possible to specify the ``none`` auth type (via ``--os-auth-type`` CLI argument or
+    ``OS_AUTH_TYPE`` environment variable). To use it, ``--os-endpoint`` CLI argument or
+    ``OS_ENDPOINT`` environment variable must be specified. See `the bug
+    <https://bugs.launchpad.net/python-openstackclient/+bug/1724283>`_ for more detail.