Add config tree to synapse. Add support for reading config from a file

synapse/config/logger.py

@@ -0,0 +1,67 @@
+# -*- coding: utf-8 -*-
+# Copyright 2014 matrix.org
+#
+# 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 ._base import Config
+
+from twisted.python.log import PythonLoggingObserver
+import logging
+import logging.config
+import os
+
+class LoggingConfig(Config):
+    def __init__(self, args):
+        self.verbosity = int(args.verbose) if args.verbose else None
+        self.log_config = os.path.abspath(args.log_config)
+        self.log_file = os.path.abspath(args.log_file)
+
+    @classmethod
+    def add_arguments(cls, parser):
+        super(LoggingConfig, cls).add_arguments(parser)
+        logging_group = parser.add_argument_group("logging")
+        logging_group.add_argument(
+            '-v', '--verbose', dest="verbose", action='count',
+            help="The verbosity level."
+        )
+        logging_group.add_argument(
+            '-f', '--log-file', dest="log_file", default=None,
+            help="File to log to."
+        )
+        logging_group.add_argument(
+            '--log-config', dest="log_config", default=None,
+            help="Python logging config file"
+        )
+
+    def setup_logging(self):
+        log_format = (
+            '%(asctime)s - %(name)s - %(lineno)d - %(levelname)s - %(message)s'
+        )
+        if self.config_path is None:
+
+            level = logging.INFO
+            if verbosity:
+               level = logging.DEBUG
+
+               # FIXME: we need a logging.WARN for a -q quiet option
+
+            logging.basicConfig(
+                level=level,
+                filename=filename,
+                format=log_format
+            )
+        else:
+            logging.config.fileConfig(config_path)
+
+        observer = PythonLoggingObserver()
+        observer.start()