[PATCH v1 4/8] dts: add basic logging facility

["Juraj Linkeš" <juraj.linkes@pantheon.tech>]

The logging module provides loggers distinguished by two attributes,
a custom format and a verbosity switch.

Signed-off-by: Juraj Linkeš <juraj.linkes@pantheon.tech>
---
 dts/framework/logger.py | 86 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 86 insertions(+)
 create mode 100644 dts/framework/logger.py

diff --git a/dts/framework/logger.py b/dts/framework/logger.py
new file mode 100644
index 0000000000..1bda7c58c5
--- /dev/null
+++ b/dts/framework/logger.py
@@ -0,0 +1,86 @@
+# SPDX-License-Identifier: BSD-3-Clause
+# Copyright(c) 2010-2014 Intel Corporation
+#
+
+import logging
+
+"""
+DTS logger module with several log level. DTS framework and TestSuite log
+will saved into different log files.
+"""
+verbose = False
+date_fmt = "%d/%m/%Y %H:%M:%S"
+stream_fmt = "%(name)30s: %(message)s"
+
+# List for saving all using loggers
+global Loggers
+Loggers = []
+
+
+def set_verbose():
+    global verbose
+    verbose = True
+
+
+class DTSLOG(logging.LoggerAdapter):
+    """
+    DTS log class for framework and testsuite.
+    """
+
+    def __init__(self, logger, node="suite"):
+        global log_dir
+
+        self.logger = logger
+        self.logger.setLevel(logging.DEBUG)
+
+        self.node = node
+        super(DTSLOG, self).__init__(self.logger, dict(node=self.node))
+
+        self.sh = None
+
+        # add handler to emit to stdout
+        sh = logging.StreamHandler()
+        self.__log_handler(sh)
+
+    def __log_handler(self, sh):
+        """
+        Config stream handler and file handler.
+        """
+        sh.setFormatter(logging.Formatter(stream_fmt, date_fmt))
+
+        sh.setLevel(logging.DEBUG)  # file handler default level
+        global verbose
+        if verbose is True:
+            sh.setLevel(logging.DEBUG)
+        else:
+            sh.setLevel(logging.INFO)  # console handler default level
+
+        self.logger.addHandler(sh)
+
+        if self.sh is not None:
+            self.logger.removeHandler(self.sh)
+
+        self.sh = sh
+
+    def logger_exit(self):
+        """
+        Remove stream handler and logfile handler.
+        """
+        if self.sh is not None:
+            self.logger.removeHandler(self.sh)
+
+
+def getLogger(name, node="suite"):
+    """
+    Get logger handler and if there's no handler for specified Node will create one.
+    """
+    global Loggers
+    # return saved logger
+    for logger in Loggers:
+        if logger["name"] == name and logger["node"] == node:
+            return logger["logger"]
+
+    # return new logger
+    logger = DTSLOG(logging.getLogger(name), node)
+    Loggers.append({"logger": logger, "name": name, "node": node})
+    return logger
-- 
2.20.1