generate configuration via oslo

add a sample configuration file and a tox environment to generate the
configuration files.

Change-Id: I96c3955b9e320939a87a6d6def8dc98604405bc3

etc/ooi.conf.sample

@@ -0,0 +1,15 @@
+[DEFAULT]
+
+#
+# From ooi
+#
+
+# The IP address on which the OCCI (ooi) API will listen. (string value)
+#ooi_listen = 0.0.0.0
+
+# The port on which the OCCI (ooi) API will listen. (integer value)
+#ooi_listen_port = 8787
+
+# Number of workers for OCCI (ooi) API service. The default will be equal to
+# the number of CPUs available. (integer value)
+#ooi_workers = <None>

ooi/opts.py

@@ -0,0 +1,21 @@
+# -*- coding: utf-8 -*-
+
+# Copyright 2015 Spanish National Research Council (CSIC)
+#
+# 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 ooi import wsgi
+
+
+def list_opts():
+    return [("DEFAULT", wsgi.occi_opts)]

setup.cfg

@@ -47,6 +47,8 @@ output_file = ooi/locale/ooi.pot
 [entry_points]
 paste.filter_factory =
     ooi = ooi.wsgi:OCCIMiddleware.factory
+oslo.config.opts =
+    ooi = ooi.opts:list_opts
 
 [pbr]
 # Have pbr generate the module indexes like sphinx autodoc

tox.ini

@@ -30,6 +30,10 @@ deps = coveralls
 [testenv:docs]
 commands = python setup.py build_sphinx
 
+[testenv:genconfig]
+commands = oslo-config-generator --output-file etc/ooi.conf.sample \
+                                 --namespace ooi --wrap-width 79
+
 [flake8]
 # H803 skipped on purpose per list discussion.
 # E123, E125 skipped as they are invalid PEP-8.