[cli] adds python logging facility configuration.

bonobo/commands/__init__.py

@@ -1,12 +1,13 @@
 import argparse
 
-import logging
-from stevedore import ExtensionManager
+from bonobo import logging, settings
+
+logger = logging.get_logger()
 
 
 def entrypoint(args=None):
-    logging.basicConfig()
     parser = argparse.ArgumentParser()
+    parser.add_argument('--debug', '-D', action='store_true')
 
     subparsers = parser.add_subparsers(dest='command')
     subparsers.required = True
@@ -18,10 +19,17 @@ def entrypoint(args=None):
             parser = subparsers.add_parser(ext.name)
             commands[ext.name] = ext.plugin(parser)
         except Exception:
-            logging.exception('Error while loading command {}.'.format(ext.name))
+            logger.exception('Error while loading command {}.'.format(ext.name))
 
+    from stevedore import ExtensionManager
     mgr = ExtensionManager(namespace='bonobo.commands')
     mgr.map(register_extension)
 
     args = parser.parse_args(args).__dict__
+    if args.pop('debug', False):
+        settings.DEBUG = True
+        settings.LOGGING_LEVEL = logging.DEBUG
+        logging.set_level(settings.LOGGING_LEVEL)
+
+    logger.debug('Command: ' + args['command'] + ' Arguments: ' + repr(args))
     commands[args.pop('command')](**args)