From fc8b932723bdb32b961aaf01319b4282164cfbdb Mon Sep 17 00:00:00 2001
From: Thomas Adamcik <adamcik@samfundet.no>
Date: Wed, 5 May 2010 18:33:05 +0200
Subject: [PATCH] Add file based debug logger

---
 mopidy/__main__.py | 23 +++++++++++++++++++++--
 mopidy/settings.py |  6 ++++++
 2 files changed, 27 insertions(+), 2 deletions(-)

diff --git a/mopidy/__main__.py b/mopidy/__main__.py
index 12d27ed3..0769d6b6 100644
--- a/mopidy/__main__.py
+++ b/mopidy/__main__.py
@@ -1,5 +1,6 @@
 import asyncore
 import logging
+import logging.handlers
 import multiprocessing
 import optparse
 import os
@@ -16,7 +17,7 @@ logger = logging.getLogger('mopidy.main')
 
 def main():
     options = _parse_options()
-    _setup_logging(options.verbosity_level)
+    _setup_logging(options.verbosity_level, options.debug)
     get_or_create_folder('~/.mopidy/')
     core_queue = multiprocessing.Queue()
     get_class(settings.SERVER)(core_queue)
@@ -32,17 +33,35 @@ def _parse_options():
     parser.add_option('-v', '--verbose',
         action='store_const', const=2, dest='verbosity_level',
         help='more output (debug level)')
+    parser.add_option('-d', '--debug',
+        action='store_true', dest='debug',
+        help='debug logging to file')
     return parser.parse_args()[0]
 
-def _setup_logging(verbosity_level):
+def _setup_logging(verbosity_level, debug):
     if verbosity_level == 0:
         level = logging.WARNING
     elif verbosity_level == 2:
         level = logging.DEBUG
     else:
         level = logging.INFO
+
     logging.basicConfig(format=settings.CONSOLE_LOG_FORMAT, level=level)
 
+    if not debug:
+        return
+
+    root = logging.getLogger('')
+    root.setLevel(logging.DEBUG)
+
+    formatter = logging.Formatter(settings.DEBUG_LOG_FORMAT)
+
+    handler = logging.handlers.RotatingFileHandler(
+        settings.DEBUG_LOG_FILENAME, maxBytes=102400, backupCount=3)
+    handler.setFormatter(formatter)
+
+    root.addHandler(handler)
+
 if __name__ == '__main__':
     try:
         main()
diff --git a/mopidy/settings.py b/mopidy/settings.py
index 886e7189..470bf2a2 100644
--- a/mopidy/settings.py
+++ b/mopidy/settings.py
@@ -29,6 +29,12 @@ BACKENDS = (
 CONSOLE_LOG_FORMAT = u'%(levelname)-8s %(asctime)s' + \
     ' [%(process)d:%(threadName)s] %(name)s\n  %(message)s'
 
+#: The log format used for debug log dumps.
+DEBUG_LOG_FORMAT = u'%(asctime)s - %(levelname)-5s - %(name)s - %(message)s'
+
+#: The file to log debug data to.
+DEBUG_LOG_FILENAME = u'debug.log'
+
 #: Protocol frontend to use. Default::
 #:
 #:     FRONTEND = u'mopidy.mpd.frontend.MpdFrontend'