improve readability of the honcho console logs in the dev environment

* colorize uwsgi and celery logs; DEBUG lines are green, WARN lines
  are yellow, ERROR lines (and tracebacks) are red
* pretty-print fact callback receiver JSON
* simplify the uwsgi log format so it's more legible

awx/main/management/commands/run_callback_receiver.py

@@ -114,7 +114,13 @@ class CallbackBrokerWorker(ConsumerMixin):
                 if 'job_id' not in body and 'ad_hoc_command_id' not in body:
                     raise Exception('Payload does not have a job_id or ad_hoc_command_id')
                 if settings.DEBUG:
-                    logger.info('Body: {}'.format(body))
+                    from pygments import highlight
+                    from pygments.lexers import PythonLexer
+                    from pygments.formatters import Terminal256Formatter
+                    from pprint import pformat
+                    logger.info('Body: {}'.format(
+                        highlight(pformat(body, width=160), PythonLexer(), Terminal256Formatter(style='friendly'))
+                    ))
                 try:
                     if 'job_id' in body:
                         JobEvent.create_from_data(**body)

awx/main/tasks.py

@@ -225,7 +225,7 @@ def tower_periodic_scheduler(self):
     run_now = now()
     state = TowerScheduleState.get_solo()
     last_run = state.schedule_last_run
-    logger.debug("Last run was: %s", last_run)
+    logger.debug("Last scheduler run was: %s", last_run)
     state.schedule_last_run = run_now
     state.save()
 

awx/main/utils/handlers.py

@@ -17,6 +17,7 @@ from requests.exceptions import RequestException
 # loggly
 import traceback
 
+from django.conf import settings
 from requests_futures.sessions import FuturesSession
 
 # AWX
@@ -304,6 +305,33 @@ HANDLER_MAPPING = {
 }
 
 
+ColorHandler = logging.StreamHandler
+
+if settings.COLOR_LOGS is True:
+    try:
+        from logutils.colorize import ColorizingStreamHandler
+
+        class ColorHandler(ColorizingStreamHandler):
+
+            def format(self, record):
+                message = logging.StreamHandler.format(self, record)
+                return '\n'.join([
+                    self.colorize(line, record)
+                    for line in message.splitlines()
+                ])
+
+            level_map = {
+                logging.DEBUG: (None, 'green', True),
+                logging.INFO: (None, None, True),
+                logging.WARNING: (None, 'yellow', True),
+                logging.ERROR: (None, 'red', True),
+                logging.CRITICAL: (None, 'red', True),
+            }
+    except ImportError:
+        # logutils is only used for colored logs in the dev environment
+        pass
+
+
 def _add_or_remove_logger(address, instance):
     specific_logger = logging.getLogger(address)
     for i, handler in enumerate(specific_logger.handlers):