Add support for extension list

 - Add support in the common section for extension list. This only
   supports Identity for now. Once the APIs for volume and compute
   are supported in the respective APIs, they will be added. Once
   network is added to this client, it will be added (the API already
   supports it).
 - Include extension fakes for volume and compute for pre-enablement.

Change-Id: Iebb0156a779887d2ab06488a2a27b70b56369376
Closes-Bug: #1319115

1 files changed, 78 insertions, 0 deletions

diff --git a/openstackclient/common/extension.py b/openstackclient/common/extension.py
new file mode 100644
index 00000000..a8b1a6b0
--- /dev/null
+++ b/openstackclient/common/extension.py
@@ -0,0 +1,78 @@
+#   Copyright 2012-2013 OpenStack Foundation
+#
+#   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.
+#
+
+"""Extension action implementations"""
+
+import logging
+
+from cliff import lister
+
+from openstackclient.common import exceptions as exc
+from openstackclient.common import utils
+
+
+class ListExtension(lister.Lister):
+    """List extension command"""
+
+    # TODO(mfisch): add support for volume and compute
+    # when the underlying APIs support it. Add support
+    # for network when it's added to openstackclient.
+
+    log = logging.getLogger(__name__ + '.ListExtension')
+
+    def get_parser(self, prog_name):
+        parser = super(ListExtension, self).get_parser(prog_name)
+        parser.add_argument(
+            '--long',
+            action='store_true',
+            default=False,
+            help='List additional fields in output')
+        parser.add_argument(
+            '--identity',
+            action='store_true',
+            default=False,
+            help='List extensions for the Identity API')
+        return parser
+
+    def take_action(self, parsed_args):
+        self.log.debug('take_action(%s)' % parsed_args)
+
+        if parsed_args.long:
+            columns = ('Name', 'Namespace', 'Description',
+                       'Alias', 'Updated', 'Links')
+        else:
+            columns = ('Name', 'Alias', 'Description')
+
+        data = []
+
+        # by default we want to show everything, unless the
+        # user specifies one or more of the APIs to show
+        # for now, only identity is supported
+        show_all = (not parsed_args.identity)
+
+        if parsed_args.identity or show_all:
+            identity_client = self.app.client_manager.identity
+            try:
+                data += identity_client.extensions.list()
+            except Exception:
+                raise exc.CommandError(
+                    "Extensions list not supported by"
+                    " identity API")
+
+        return (columns,
+                (utils.get_item_properties(
+                    s, columns,
+                    formatters={},
+                ) for s in data))