fix/log_level_cfg (#252)

* fix/log_level_cfg

react to changes in log level from mycroft.conf

* dict_hash

* ensure log level

ovos_utils/log.py

@@ -12,6 +12,7 @@
 #
 import functools
 import inspect
+import json
 import logging
 import os
 import sys
@@ -103,7 +104,8 @@ def init(cls, config=None):
         cls.base_path = config.get("path") or xdg_path
         cls.max_bytes = config.get("max_bytes", 50000000)
         cls.backup_count = config.get("backup_count", 3)
-        cls.level = config.get("level") or LOG.level
+        level = config.get("level") or LOG.level
+        cls.set_level(level)
         cls.diagnostic_mode = config.get("diagnostic", False)
 
     @classmethod
@@ -191,16 +193,38 @@ def exception(cls, *args, **kwargs):
         cls._get_real_logger().exception(*args, **kwargs)
 
 
+def _monitor_log_level():
+    _logs_conf = get_logs_config(LOG.name)
+    hax = hash(json.dumps(_logs_conf, sort_keys=True, indent=2))
+    if hax != _monitor_log_level.config_hash:
+        _monitor_log_level.config_hash = hax
+        LOG.init(_logs_conf)
+        LOG.info("updated LOG level")
+
+
+_monitor_log_level.config_hash = None
+
+
 def init_service_logger(service_name):
-    # this is makes all logs from this service be configured to write to service_name.log file
-    # if this is not called in every __main__.py entrypoint logs will be written
-    # to a generic OVOS.log file shared across all services
+    _logs_conf = get_logs_config(service_name)
+    _monitor_log_level.config_hash = hash(json.dumps(_logs_conf, sort_keys=True, indent=2))
+    LOG.name = service_name
+    LOG.init(_logs_conf)  # setup the LOG instance
     try:
-        from ovos_config.config import read_mycroft_config
-        _cfg = read_mycroft_config()
+        from ovos_config import Configuration
+        Configuration.set_config_watcher(_monitor_log_level)
     except ImportError:
-        LOG.warning("ovos_config not available. Falling back to defaults")
-        _cfg = dict()
+        LOG.warning("Can not monitor config LOG level changes")
+
+
+def get_logs_config(service_name=None, _cfg=None) -> dict:
+    if _cfg is None:
+        try:
+            from ovos_config import Configuration
+            _cfg = Configuration()
+        except ImportError:
+            LOG.warning("ovos_config not available. Falling back to defaults")
+            _cfg = {}
 
     # First try and get the "logging" section
     log_config = _cfg.get("logging")
@@ -213,15 +237,14 @@ def init_service_logger(service_name):
         # where per-service "logs" are not defined
         _logs_conf = log_config.get("logs") or _logs_conf
         # Now get our config by service name
-        _cfg = log_config.get(service_name) or log_config
-        # and if "logs" is redefined in "logging.<service_name>" use that
-        _logs_conf = _cfg.get("logs") or _logs_conf
+        if service_name:
+            _cfg = log_config.get(service_name) or log_config
+            # and if "logs" is redefined in "logging.<service_name>" use that
+            _logs_conf = _cfg.get("logs") or _logs_conf
     # Grab the log level from whatever section we found, defaulting to INFO
     _log_level = _cfg.get("log_level", "INFO")
-    # and write it into the "logs" config
     _logs_conf["level"] = _log_level
-    LOG.name = service_name
-    LOG.init(_logs_conf)  # setup the LOG instance
+    return _logs_conf
 
 
 def log_deprecation(log_message: str = "DEPRECATED",