Add mixmatch-manage cli command with db_sync

This adds a cli for management commands that is run through
`mixmatch-manage`.

Also added `db_sync` which is creates the tables in the database
based on the model. No upgrade functionality exists yet.

Change-Id: I18187967bb62865529712c83ef60482c3d1ed8ca

devstack/mixmatch.sh

@@ -67,6 +67,8 @@ function configure_mixmatch {
     iniset $GLANCE_CONF oslo_messaging_notifications driver messaging
     iniset $CINDER_CONF oslo_messaging_notifications topics notifications
 
+    mixmatch-manage db_sync
+
     sudo cp $MIXMATCH_DIR/httpd/mixmatch-uwsgi.conf $(apache_site_config_for mixmatch)
     enable_apache_site mixmatch
     restart_apache_server

mixmatch/cli.py

@@ -0,0 +1,50 @@
+#   Copyright 2017 Massachusetts Open Cloud
+#
+#   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 oslo_config import cfg
+
+from mixmatch import config
+from mixmatch import model
+
+CONF = config.CONF
+
+
+def do_db_sync():
+    model.create_tables()
+
+
+def register_parsers(subparsers):
+
+    db_sync = subparsers.add_parser(
+        'db_sync',
+        description='Prepares the database. Needs to be executed before'
+                    ' starting the service.',
+        help='Prepares the database.'
+    )
+    db_sync.set_defaults(func=do_db_sync)
+
+
+def main():
+    command = cfg.SubCommandOpt('command',
+                                title='Command',
+                                help='Mixmatch management commands.',
+                                handler=register_parsers)
+    CONF.register_cli_opt(command)
+    config.load_from_file()
+
+    CONF.command.func()
+
+
+if __name__ == '__main__':
+    main()

mixmatch/proxy.py

@@ -374,7 +374,6 @@ def proxy(path):
 
 def main():
     config.configure()
-    model.create_tables()
     extend.load_extensions()
 
 

setup.cfg

@@ -36,6 +36,8 @@ data_files =
 [entry_points]
 wsgi_scripts =
     mixmatch = mixmatch.wsgi:get_application
+console_scripts =
+    mixmatch-manage = mixmatch.cli:main
 
 oslo.config.opts =
     mixmatch = mixmatch.config:list_opts