have list-deliverables look for valid values by querying the schema

An earlier change in the series removed the static data being used for
configuring the command line interface of list-deliverables. Replace
that with something that reads the schema file instead so we only need
to have the settings in one place.

Change-Id: Ib40e3bdff2f127cf5041dfffb03d53c0d1a6f3a0
Signed-off-by: Doug Hellmann <doug@doughellmann.com>

openstack_releases/cmds/list_deliverables.py

@@ -17,12 +17,14 @@ import csv
 import operator
 
 import openstack_releases
-from openstack_releases.cmds import validate
 from openstack_releases import defaults
 from openstack_releases import deliverable
+from openstack_releases import schema
 
 
 def main():
+    deliverable_schema = schema.Schema()
+
     parser = argparse.ArgumentParser()
     output_mode = parser.add_mutually_exclusive_group()
     output_mode.add_argument(
@@ -72,6 +74,7 @@ def main():
         '--model',
         help=('the release model, such as "cycle-with-milestones"'
               ' or "independent"'),
+        choices=sorted(deliverable_schema.release_models + ['independent']),
     )
     model.add_argument(
         '--cycle-based',
@@ -83,7 +86,7 @@ def main():
         '--type',
         default=[],
         action='append',
-        choices=list(sorted(validate._VALID_TYPES)),
+        choices=sorted(deliverable_schema.release_types),
         help='deliverable type, such as "library" or "service"',
     )
     parser.add_argument(

openstack_releases/schema.py

@@ -0,0 +1,32 @@
+# 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.
+
+import pkgutil
+
+from openstack_releases import yamlutils
+
+
+class Schema(object):
+
+    def __init__(self):
+        self._raw = pkgutil.get_data('openstack_releases', 'schema.yaml')
+        self._data = yamlutils.loads(self._raw.decode('utf-8'))
+
+    @property
+    def release_types(self):
+        return self._data['properties']['type']['enum']
+
+    @property
+    def release_models(self):
+        return self._data['properties']['release-model']['enum']