Fix broken help commands for monasca-*

Call for:

* monasca-collector -h
* monasca-forwader -h
* monasca-statsd -h

was broken, as described in [1].

Commits removes usage of deprecated optparse in favor
of argparse.

Ref:
[1] https://storyboard.openstack.org/#!/story/2000995

Story: 2000998
Task: 4180
Change-Id: I8879f1f11a2502c180407c93e13d22451f6f2fa2

monasca_agent/collector/daemon.py

@@ -163,7 +163,7 @@ class CollectorDaemon(monasca_agent.common.daemon.Daemon):
 
 
 def main():
-    options, args = util.get_parsed_args()
+    options, args = util.get_parsed_args(prog='monasca-collector')
     config = cfg.Config()
     collector_config = config.get_config(['Main', 'Api', 'Logging'])
     autorestart = collector_config.get('autorestart', False)

monasca_agent/common/util.py

@@ -1,12 +1,12 @@
 # (C) Copyright 2015-2017 Hewlett Packard Enterprise Development LP
 
+import argparse
 import glob
 import hashlib
 import imp
 import inspect
 import itertools
 import math
-import optparse
 import os
 import platform
 import re
@@ -444,21 +444,18 @@ def get_hostname():
         return hostname
 
 
-def get_parsed_args():
-    parser = optparse.OptionParser()
-    parser.add_option('-c', '--clean', action='store_true', default=False, dest='clean')
-    parser.add_option('-v', '--verbose', action='store_true', default=False, dest='verbose',
-                      help='Print out stacktraces for errors in checks')
-    parser.add_option('-f', '--config-file', default=None, dest='config_file',
-                      help='Location for an alternate config rather than '
-                           'using the default config location.')
+def get_parsed_args(prog=None):
+    parser = argparse.ArgumentParser(prog=prog)
+    parser.add_argument('-c', '--clean', action='store_true', default=False, dest='clean')
+    parser.add_argument('-v', '--verbose', action='store_true', default=False, dest='verbose',
+                        help='Print out stacktraces for errors in checks')
+    parser.add_argument('-f', '--config-file', default=None, dest='config_file',
+                        help='Location for an alternate config rather than '
+                             'using the default config location.')
 
-    try:
-        options, args = parser.parse_args()
-    except SystemExit:
-        # Ignore parse errors
-        options, args = optparse.Values({'clean': False}), []
-    return options, args
+    options = parser.parse_known_args(sys.argv[1:])
+
+    return options
 
 
 def load_check_directory():

tests/test_config.py

@@ -1,12 +1,13 @@
 # -*- coding: latin-1 -*-
-import unittest
+
 import mock
 import os.path
 import tempfile
+import unittest
 
 from monasca_agent.common import config
 from monasca_agent.common.config import Config
-from monasca_agent.common.util import PidFile, is_valid_hostname
+from monasca_agent.common import util
 
 
 class TestConfig(unittest.TestCase):
@@ -30,7 +31,7 @@ class TestConfig(unittest.TestCase):
         pid_f.write(pid)
         pid_f.close()
 
-        p = PidFile(program, pid_dir)
+        p = util.PidFile(program, pid_dir)
 
         self.assertEqual(p.get_pid(), 666)
         # clean up
@@ -57,10 +58,10 @@ class TestConfig(unittest.TestCase):
         ]
 
         for hostname in valid_hostnames:
-            self.assertTrue(is_valid_hostname(hostname), hostname)
+            self.assertTrue(util.is_valid_hostname(hostname), hostname)
 
         for hostname in not_valid_hostnames:
-            self.assertFalse(is_valid_hostname(hostname), hostname)
+            self.assertFalse(util.is_valid_hostname(hostname), hostname)
 
     def testConfigIsSingleton(self):
         # create a temp conf file
@@ -112,6 +113,8 @@ class TestConfig(unittest.TestCase):
         self.assertEqual(config.DEFAULT_CONFIG_FILE, conf._configFile)
         mock_os.path.exists.assert_called_once_with(config.DEFAULT_CONFIG_FILE)
 
-
-if __name__ == '__main__':
-    unittest.main()
+    def test_verify_common_config_opts(self):
+        opts = util.get_parsed_args(prog='test')
+        opts_dict = vars(opts[0])
+        self.assertItemsEqual(['config_file', 'clean', 'verbose'],
+                              opts_dict.keys())