Add list-extensions capability to cinderclient.

Implements the list extension functionality from novaclient
written by harlowja (Change-Id: I5b72f5ea73c00f1c1a0f09f670d744c820e05837)

This provides a mechanism to view available extensions, and also
starts actually using the cinderclient contrib dir.

Original Author: harlowja

Change-Id: I4f9d04cb8a2aa05c978a2a5a926c9175ee3614bb

cinderclient/v1/contrib/list_extensions.py

@@ -0,0 +1,47 @@
+# Copyright 2011 OpenStack LLC.
+# All Rights Reserved.
+#
+#    Licensed under the Apache License, Version 2.0 (the "License"); you may
+#    not use this file except in compliance with the License. You may obtain
+#    a copy of the License at
+#
+#         http://www.apache.org/licenses/LICENSE-2.0
+#
+#    Unless required by applicable law or agreed to in writing, software
+#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+#    License for the specific language governing permissions and limitations
+#    under the License.
+
+from cinderclient import base
+from cinderclient import utils
+
+
+class ListExtResource(base.Resource):
+    @property
+    def summary(self):
+        descr = self.description.strip()
+        if not descr:
+            return '??'
+        lines = descr.split("\n")
+        if len(lines) == 1:
+            return lines[0]
+        else:
+            return lines[0] + "..."
+
+
+class ListExtManager(base.Manager):
+    resource_class = ListExtResource
+
+    def show_all(self):
+        return self._list("/extensions", 'extensions')
+
+
+@utils.service_type('volume')
+def do_list_extensions(client, _args):
+    """
+    List all the os-api extensions that are available.
+    """
+    extensions = client.list_extensions.show_all()
+    fields = ["Name", "Summary", "Alias", "Updated"]
+    utils.print_list(extensions, fields)

tests/v1/contrib/test_list_extensions.py

@@ -0,0 +1,21 @@
+from cinderclient import extension
+from cinderclient.v1.contrib import list_extensions
+
+from tests import utils
+from tests.v1 import fakes
+
+
+extensions = [
+    extension.Extension(list_extensions.__name__.split(".")[-1],
+                        list_extensions),
+]
+cs = fakes.FakeClient(extensions=extensions)
+
+
+class ListExtensionsTests(utils.TestCase):
+    def test_list_extensions(self):
+        all_exts = cs.list_extensions.show_all()
+        cs.assert_called('GET', '/extensions')
+        self.assertTrue(len(all_exts) > 0)
+        for r in all_exts:
+            self.assertTrue(len(r.summary) > 0)

tests/v1/fakes.py

@@ -61,7 +61,8 @@ class FakeClient(fakes.FakeClient, client.Client):
 
     def __init__(self, *args, **kwargs):
         client.Client.__init__(self, 'username', 'password',
-                               'project_id', 'auth_url')
+                               'project_id', 'auth_url',
+                               extensions=kwargs.get('extensions'))
         self.client = FakeHTTPClient(**kwargs)
 
 
@@ -96,7 +97,6 @@ class FakeHTTPClient(base_client.HTTPClient):
 
         # Note the call
         self.callstack.append((method, url, kwargs.get('body', None)))
-
         status, headers, body = getattr(self, callback)(**kwargs)
         r = utils.TestResponse({
             "status_code": status,
@@ -267,3 +267,29 @@ class FakeHTTPClient(base_client.HTTPClient):
 
     def delete_types_1(self, **kw):
         return (202, {}, None)
+
+    #
+    # List all extensions
+    #
+    def get_extensions(self, **kw):
+        exts = [
+            {
+                "alias": "FAKE-1",
+                "description": "Fake extension number 1",
+                "links": [],
+                "name": "Fake1",
+                "namespace": ("http://docs.openstack.org/"
+                              "/ext/fake1/api/v1.1"),
+                "updated": "2011-06-09T00:00:00+00:00"
+            },
+            {
+                "alias": "FAKE-2",
+                "description": "Fake extension number 2",
+                "links": [],
+                "name": "Fake2",
+                "namespace": ("http://docs.openstack.org/"
+                              "/ext/fake1/api/v1.1"),
+                "updated": "2011-06-09T00:00:00+00:00"
+            },
+        ]
+        return (200, {}, {"extensions": exts, })