log configuration loads upon init if provided

app_skellington/app_container.py

@@ -12,6 +12,8 @@ from . import _util
 from . import cli
 from . import cfg
 
+import logging
+
 # These two variables affect the directory paths for
 # config files and logging.
 DEFAULT_APP_NAME = ''
@@ -54,7 +56,13 @@ class ApplicationContainer:
         config = cfg.Config(configspec_filepath, configini_filepath)
 
         logger = log.LoggingLayer(self.appname, self.appauthor)
-        logger.configure_logging()
+        # Try and load logging configuration if provided
+        log_config = config.get('logging')
+        if log_config is not None:
+            logger.configure_logging(log_config)
+        else:
+            logger.configure_logging()
+
 
         self.ctx = ApplicationContext(config, logger)
         self['ctx'] = lambda: self.ctx

app_skellington/cfg.py

@@ -18,6 +18,11 @@ class Config:
     """
     Structure to store application runtime configuration. Also contains
     functionality to load configuration from local site file.
+
+    Provide config.spec - specification file which defines allowed parameters and types.
+
+    Provide config.ini - configuration instance which contains values for any
+    configuration arguments.
     """
 
     DEFAULT_CAPABILITIES = {
@@ -146,6 +151,19 @@ class Config:
         """
         self._config_obj[key] = value
 
+    def get(self, key, default=None):
+        """
+        Attempt to retrieve configuration item, otherwise return default
+        provided value.
+
+        Similar to Dictionary.get()
+        """
+        try:
+            v = self.__getitem__(key)
+            return v
+        except KeyError as ex:
+            return default
+
     def load_config(
         self, configspec_filepath=None, configini_filepath=None
     ):

app_skellington/cli.py

@@ -80,9 +80,8 @@ class CommandTree:
         Creates a root-level submenu with no entries. SubMenu node is
         returned which can have submenus and commands attached to it.
         """
-        # NOTE(MG) Fix below strategizes whether to pass in 'required'
-        # paremter to ArgumentParser.add_subparsers()
-        # which was added in in Python3.7.
+        # NOTE(MG) Fix for Python>=3.7,
+        # argparse.ArgumentParser added 'required' argument.
         # Must also be written into SubMenu.create_submenu.
         func_args = {
             'dest': param_name,
@@ -91,11 +90,12 @@ class CommandTree:
         }
         if (
             sys.version_info.major == 3
-            and sys.version_info.minor <= 6
+            and sys.version_info.minor < 7
         ):
             if is_required:
                 _bootstrap_logger.warn('Unable to enforce required submenu: Requires >= Python 3.7')
             del func_args['required']
+        # END fix for Python<3.7
 
         # Creates an argument as a slot in the underlying argparse.
         subparsers = self.root_parser.add_subparsers(
@@ -447,9 +447,8 @@ class SubMenu:
             help='sub-submenu help',
             description='sub-sub description')
 
-        # NOTE(MG) Fix below strategizes whether to pass in 'required'
-        # paremter to ArgumentParser.add_subparsers()
-        # which was added in in Python3.7.
+        # NOTE(MG) Fix for Python>=3.7,
+        # argparse.ArgumentParser added 'required' argument.
         # Must also be written into CommandTree.init_submenu
         func_args = {
             'dest': var_name,
@@ -458,11 +457,14 @@ class SubMenu:
         }
         if (
             sys.version_info.major == 3
-            and sys.version_info.minor <= 6
+            and sys.version_info.minor < 7
         ):
             if is_required:
                 _bootstrap_logger.warn('Unable to enforce required submenu: Requires >= Python 3.7')
             del func_args['required']
+        # END fix for Python<3.7
+
+
         # Turn entry into a submenu of it's own:
         # type = _SubParsersAction
         subp_node = entry_node.add_subparsers(

app_skellington/log.py

@@ -78,7 +78,6 @@ class LoggingLayer:
         self.transform_config(config_dict)
 
         try:    
-            # TODO(MG) Pretty print
             _bootstrap_logger.debug('log - Log configuration: %s', config_dict)
             logging.config.dictConfig(config_dict)
             _bootstrap_logger.debug('log - Configured all logging')
@@ -108,13 +107,16 @@ class LoggingLayer:
             d = config_dict['loggers'][logger]
             self._convert_str_to_loglevel(d, 'level')
 
-        # Replace 'root' logger with '', logging module convention for root handler
-        # Note: '' is disallowed in ConfigObj (hence the reason for this replacement)
+
+        # Implementation note: 
+        # app_skellington expects root logger configuration to be under 'root'
+        # instead of '' (python spec) because '' is not a valid name in ConfigObj.
         try:
-            config_dict['loggers'][''] = config_dict['loggers']['root']
-            del config_dict['loggers']['root']
+            if config_dict['loggers'].get('root') is not None:
+                config_dict['loggers'][''] = config_dict['loggers']['root']
+                del config_dict['loggers']['root']
         except Exception as ex:
-            _bootstrap.logger.warn('internal failure patching root logger')
+            _bootstrap_logger.warn('was not able to find and patch root logger configuration from arguments')
 
 
         # Evaluate the full filepath of the file handler