python: Implemented saving a log file with all messages independently…

… of how logger levels are set.

python/inet/common/util.py

@@ -15,8 +15,6 @@
 
 __sphinx_mock__ = True # ignore this module in documentation
 
-_logger = logging.getLogger(__name__)
-
 COLOR_GRAY = "\033[38;20m"
 COLOR_RED = "\033[1;31m"
 COLOR_YELLOW = "\033[1;33m"
@@ -33,10 +31,52 @@ def enable_autoreload():
     ipython.magic("load_ext autoreload")
     ipython.magic("autoreload 2")
 
+_file_handler = None
+
+class LocalLogger(logging.Logger):
+    def stdout(self, message, *args, **kwargs):
+        self._log(STDOUT_LEVEL, message, args, **kwargs)
+
+    def stderr(self, message, *args, **kwargs):
+        self._log(STDERR_LEVEL, message, args, **kwargs)
+
+    def debug(self, msg, *args, **kwargs):
+        self._log(logging.DEBUG, msg, args, **kwargs)
+
+    def info(self, msg, *args, **kwargs):
+        self._log(logging.INFO, msg, args, **kwargs)
+
+    def warning(self, msg, *args, **kwargs):
+        self._log(logging.WARNING, msg, args, **kwargs)
+
+    def error(self, msg, *args, **kwargs):
+        self._log(logging.ERROR, msg, args, **kwargs)
+
+    def critical(self, msg, *args, **kwargs):
+        self._log(logging.CRITICAL, msg, args, **kwargs)
+
+    def log(self, level, msg, *args, **kwargs):
+        self._log(level, msg, args, **kwargs)
+
+    def handle(self, record):
+        global _file_handler
+        if _file_handler:
+            _file_handler.handle(record)
+        if self.isEnabledFor(record.levelno):
+            super().handle(record)
+
+logging.setLoggerClass(LocalLogger)
+
+_logger = logging.getLogger(__name__)
+
 _logging_initialized = False
 
 def initialize_logging(log_level, external_command_log_level, log_file):
-    global _logging_initialized
+    global _file_handler, _logging_initialized
+    if log_file:
+        _file_handler = logging.FileHandler(log_file, mode="w")
+        _file_handler.setLevel(logging.DEBUG)
+        _file_handler.setFormatter(logging.Formatter('%(asctime)s\t%(name)s\t%(levelname)s\t%(message)s'))
     formatter = ColoredLoggingFormatter()
     handler = logging.StreamHandler()
     handler.setFormatter(formatter)
@@ -54,14 +94,6 @@ def initialize_logging(log_level, external_command_log_level, log_file):
     logging.getLogger("opp_test").setLevel(external_command_log_level)
     logging.addLevelName(STDOUT_LEVEL, "STDOUT")
     logging.addLevelName(STDERR_LEVEL, "STDERR")
-    def stdout(self, message, *args, **kwargs):
-        if self.isEnabledFor(STDOUT_LEVEL):
-            self._log(STDOUT_LEVEL, message, args, **kwargs)
-    def stderr(self, message, *args, **kwargs):
-        if self.isEnabledFor(STDERR_LEVEL):
-            self._log(STDERR_LEVEL, message, args, **kwargs)
-    logging.Logger.stdout = stdout
-    logging.Logger.stderr = stderr
     _logging_initialized = True
 
 def ensure_logging_initialized(log_level, external_command_log_level, log_file):