use a special logger to make DEBUG log activation dynamic (fixes #8028)

Adds a new logger called DjangoLogger which check if the level is a
SettingsLogLevel object, in this case it checks a Django setting to
known if it should return DEBUG intead of the default log level.

The authentic2.logger module must be imported before using the logging
module so that all created logger use our new class. To achieve that
import is done in authentic2-ctl and wsgi.py which are the entrypoints
for authentic2.

authentic2-ctl

@@ -1,6 +1,7 @@
 #!/usr/bin/env python
 import os
 import sys
+import authentic2.logger
 
 if __name__ == "__main__":
     config_file = False

src/authentic2/logger.py

@@ -0,0 +1,24 @@
+import logging
+
+class SettingsLogLevel(int):
+    def __new__(cls, default_log_level, debug_setting='DEBUG'):
+        return super(SettingsLogLevel, cls).__new__(
+            cls, getattr(logging, default_log_level))
+
+    def __init__(self, default_log_level, debug_setting='DEBUG'):
+        self.debug_setting = debug_setting
+        super(SettingsLogLevel, self).__init__(
+            getattr(logging, default_log_level))
+
+class DjangoLogger(logging.getLoggerClass()):
+    def getEffectiveLevel(self):
+        level = super(DjangoLogger, self).getEffectiveLevel()
+        if isinstance(level, SettingsLogLevel):
+            from django.conf import settings
+            debug = getattr(settings, level.debug_setting, False)
+            if debug:
+                return logging.DEBUG
+        return level
+
+logging.setLoggerClass(DjangoLogger)
+

src/authentic2/settings.py

@@ -1,3 +1,4 @@
+import logging
 import logging.config
 # Load default from Django
 from django.conf.global_settings import *
@@ -5,7 +6,7 @@ import os
 
 import django
 
-from . import plugins
+from . import plugins, logger
 
 BASE_DIR = os.path.dirname(__file__)
 
@@ -16,7 +17,7 @@ BASE_DIR = os.path.dirname(__file__)
 SECRET_KEY = 'please-change-me-with-a-very-long-random-string'
 
 # SECURITY WARNING: don't run with debug turned on in production!
-DEBUG = True
+DEBUG = False
 DEBUG_DB = False
 TEMPLATE_DEBUG = True
 MEDIA = 'media'
@@ -240,8 +241,8 @@ LOGGING = {
         # even when debugging seeing SQL queries is too much, activate it
         # explicitly using DEBUG_DB
         'django.db': {
-                'level': 'INFO',
                 'handlers': ['console_db'],
+                'level': logger.SettingsLogLevel('INFO', debug_setting='DEBUG_DB'),
                 'propagate': False,
         },
         # django_select2 outputs debug message at level INFO
@@ -250,7 +251,7 @@ LOGGING = {
         },
         '': {
                 'handlers': ['console'],
-                'level': 'INFO',
+                'level': logger.SettingsLogLevel('INFO'),
         },
     },
 }
@@ -274,10 +275,4 @@ REST_FRAMEWORK = {
 
 if 'AUTHENTIC2_SETTINGS_FILE' in os.environ:
     execfile(os.environ['AUTHENTIC2_SETTINGS_FILE'])
-
-# Post local config setting
-if DEBUG:
-    LOGGING['loggers']['']['level'] = 'DEBUG'
-if DEBUG_DB:
-    LOGGING['loggers']['django.db']['level'] = 'DEBUG'
 logging.config.dictConfig(LOGGING)

src/authentic2/wsgi.py

@@ -15,6 +15,8 @@ framework.
 """
 import os
 
+from . import logger
+
 os.environ.setdefault("DJANGO_SETTINGS_MODULE", "authentic2.settings")
 
 # This application object is used by any WSGI server configured to use this