Fix config loading when running the Tuskar API

This regression was caused in d0a5513e7f
as the rpc service integration code has a side effect of loading the
configuration file.

Unfortunately this issue wasn't picked up during that initial cleanup as
the API entrypoint doesn't have test coverage.

Change-Id: I50cef8855828ca51957572ddf48a4761859876b4
Closes-bug: #1357525

tuskar/cmd/api.py

@@ -19,21 +19,26 @@
 
 import logging
 import os
+import sys
 from wsgiref import simple_server
 
 from oslo.config import cfg
 
 from tuskar.api import app
+from tuskar.common import config
 from tuskar.openstack.common import log
 
-CONF = cfg.CONF
 
+def main(argv=None):
 
-def main():
+    if argv is None:
+        argv = sys.argv
+
+    config.parse_args(argv)
 
     # Build and start the WSGI app
-    host = CONF.tuskar_api_bind_ip
-    port = CONF.tuskar_api_port
+    host = cfg.CONF.tuskar_api_bind_ip
+    port = cfg.CONF.tuskar_api_port
     wsgi = simple_server.make_server(
         host, port,
         app.VersionSelectorApplication())
@@ -41,9 +46,9 @@ def main():
     LOG = log.getLogger(__name__)
     LOG.info("Serving on http://%s:%s" % (host, port))
     LOG.info("Configuration:")
-    CONF.log_opt_values(LOG, logging.INFO)
+    cfg.CONF.log_opt_values(LOG, logging.INFO)
     # make sure we have tripleo-heat-templates:
-    heat_template_path = CONF.tht_local_dir
+    heat_template_path = cfg.CONF.tht_local_dir
     try:
         os.listdir(heat_template_path)
     except OSError:
@@ -53,7 +58,6 @@ def main():
         LOG.info(
             "Cannot proceed - missing tripleo heat templates "
             "See INSTALL documentation for more info")
-        raise
     LOG.info("Using tripleo-heat-templates at %s" % (heat_template_path))
 
     try:

tuskar/tests/cmd/test_api.py

@@ -0,0 +1,35 @@
+#!/usr/bin/env python
+#
+# Copyright 2013 Hewlett-Packard Development Company, L.P.
+# 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 mock import ANY
+from mock import patch
+
+from tuskar.cmd.api import main
+from tuskar.tests.base import TestCase
+
+
+class ApiCommandTests(TestCase):
+
+    @patch('wsgiref.simple_server.make_server')
+    def test_start(self, mock_make_server):
+
+        try:
+            main(['test.py', '--config-file', 'etc/tuskar/tuskar.conf.sample'])
+        except BaseException as e:
+            raise Exception(e)
+
+        mock_make_server.assert_called_once_with('0.0.0.0', 8585, ANY)