Create default configuration

Here we are creating a simple wrapper object to ConfigParser for the
purpose of simplifying our configuration. Now, we have a single
location to control our configuration defaults.

Change-Id: Ie49938b1eec183055bb8d462d70bcdfb733b360b
Signed-off-by: Paul Belanger <pabelanger@redhat.com>

grafana_dashboards/builder.py

@@ -25,34 +25,11 @@ LOG = logging.getLogger(__name__)
 class Builder(object):
 
     def __init__(self, config):
-        self.grafana = self._setup_grafana(config)
+        self.grafana = Grafana(
+            config.get('grafana', 'apikey'), config.get('grafana', 'url'))
         self.parser = YamlParser()
-        self.cache = self._setup_cache(config)
-
-    def _setup_cache(self, config):
-        if config.has_option('cache', 'enabled'):
-            self.cache_enabled = config.getboolean('cache', 'enabled')
-        else:
-            self.cache_enabled = True
-
-        if config.has_option('cache', 'cachedir'):
-            cachedir = config.get('cache', 'cachedir')
-        else:
-            cachedir = '~/.cache/grafyaml'
-
-        return Cache(cachedir)
-
-    def _setup_grafana(self, config):
-        if config.has_option('grafana', 'apikey'):
-            key = config.get('grafana', 'apikey')
-        else:
-            key = None
-
-        if config.has_option('grafana', 'url'):
-            url = config.get('grafana', 'url')
-        else:
-            url = 'http://localhost:8080'
-        return Grafana(url, key)
+        self.cache_enabled = config.getboolean('cache', 'enabled')
+        self.cache = Cache(config.get('cache', 'cachedir'))
 
     def load_files(self, path):
         files_to_process = []

grafana_dashboards/cmd.py

@@ -17,9 +17,8 @@ import logging
 import os
 import sys
 
-from six.moves import configparser as ConfigParser
-
 from grafana_dashboards.builder import Builder
+from grafana_dashboards.config import Config
 from grafana_dashboards import version
 
 LOG = logging.getLogger(__name__)
@@ -66,7 +65,7 @@ class Client(object):
         self.args = parser.parse_args()
 
     def read_config(self):
-        self.config = ConfigParser.ConfigParser()
+        self.config = Config()
         if self.args.config:
             fp = self.args.config
         else:

grafana_dashboards/config.py

@@ -0,0 +1,29 @@
+# Copyright 2015 Red Hat, Inc.
+#
+# 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 six.moves import configparser as ConfigParser
+
+
+class Config(ConfigParser.ConfigParser):
+
+    def __init__(self):
+        ConfigParser.ConfigParser.__init__(self)
+        # Add [cache] section
+        self.add_section('cache')
+        self.set('cache', 'cachedir', '~/.cache/grafyaml')
+        self.set('cache', 'enabled', 'true')
+        # Add [grafana] section
+        self.add_section('grafana')
+        self.set('grafana', 'apikey', '')
+        self.set('grafana', 'url', 'http://localhost:8080')

tests/base.py

@@ -23,9 +23,10 @@ import shutil
 import tempfile
 
 import fixtures
-from six.moves import configparser as ConfigParser
 import testtools
 
+from grafana_dashboards.config import Config
+
 FIXTURE_DIR = os.path.join(
     os.path.dirname(__file__), 'fixtures')
 
@@ -65,7 +66,7 @@ class TestCase(testtools.TestCase):
         self.addCleanup(self.cleanup_cachedir)
 
     def setup_config(self):
-        self.config = ConfigParser.ConfigParser()
+        self.config = Config()
         self.config.read(os.path.join(FIXTURE_DIR, 'grafyaml.conf'))
 
     def cleanup_cachedir(self):

tests/test_config.py

@@ -0,0 +1,33 @@
+# Copyright 2015 Red Hat, Inc.
+#
+# 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 grafana_dashboards.config import Config
+from tests.base import TestCase
+
+
+class TestCaseConfig(TestCase):
+
+    def setUp(self):
+        super(TestCaseConfig, self).setUp()
+        self.config = Config()
+
+    def test_defaults(self):
+        self.assertTrue(
+            self.config.getboolean('cache', 'enabled'))
+        self.assertEqual(
+            self.config.get('cache', 'cachedir'), '~/.cache/grafyaml')
+        self.assertEqual(
+            self.config.get('grafana', 'apikey'), '')
+        self.assertEqual(
+            self.config.get('grafana', 'url'), 'http://localhost:8080')