Break out common components from mgm

Add config file parser

libra/common/options.py

@@ -0,0 +1,38 @@
+# Copyright 2012 Hewlett-Packard Development Company, L.P.
+#
+# 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
+
+import argparse
+import ConfigParser
+
+
+class Options(object):
+    def __init__(self, title):
+        self.title = title
+        self._parse_args()
+        self._load_config()
+
+    def _parse_args(self):
+        parser = argparse.ArgumentParser(
+            description='Libra {title}'.format(title=self.title)
+        )
+        parser.add_argument('config', help='configuration file', type=file)
+        parser.add_argument(
+            '-d', dest='nodaemon', action='store_true',
+            help='do not run in daemon mode'
+        )
+
+        self.args = parser.parse_args()
+
+    def _load_config(self):
+        self.config = ConfigParser.ConfigParser()
+        config.readfp(self.args.config)