Check version using pbr module

Use pbr module to check package version.

Change-Id: I7557dec9044c4d43bd05c57c733d15df5ec1e736

monasca_agent/common/config.py

@@ -8,6 +8,7 @@ import yaml
 
 from monasca_agent.common.exceptions import PathNotFound
 import monasca_agent.common.singleton as singleton
+from monasca_agent import version
 
 DEFAULT_CONFIG_FILE = '/etc/monasca/agent/agent.yaml'
 DEFAULT_LOG_DIR = '/var/log/monasca/agent'
@@ -108,7 +109,7 @@ class Config(object):
         return new_config
 
     def get_version(self):
-        return pkg_resources.require("monasca-agent")[0].version
+        return version.version_string
 
     def _read_config(self):
         """Read in the config file."""

monasca_agent/version.py

@@ -0,0 +1,20 @@
+# Copyright 2017 FUJITSU LIMITED
+#
+# 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 pbr import version
+
+__all__ = ['version_info', 'version_string']
+
+version_info = version.VersionInfo('monasca-agent')
+version_string = version_info.version_string()