[FIX] hw_drivers: Redirect exceptions to log file

Exceptions were logged to stderr so we couldn't see them when Odoo was
running as a service on the IoT Box. We now redirect stderr to the logger
to see track errors in the log file too.

closes odoo#41011

Taskid: 2146835
Signed-off-by: Quentin Lejeune (qle) <[email protected]>

addons/hw_drivers/controllers/driver.py

@@ -10,6 +10,7 @@
 import urllib3
 import os
 import socket
+import sys
 from importlib import util
 import v4l2
 from fcntl import ioctl
@@ -97,6 +98,27 @@ def connect_box(self, token):
             with open(image, 'rb') as f:
                 return f.read()
 
+#----------------------------------------------------------
+# Log Exceptions
+#----------------------------------------------------------
+
+class ExceptionLogger:
+    """
+    Redirect Exceptions to the logger to keep track of them in the log file.
+    """
+
+    def __init__(self):
+        self.logger = logging.getLogger()
+
+    def write(self, message):
+        if message != '\n':
+            self.logger.err(message)
+
+    def flush(self):
+        pass
+
+sys.stderr = ExceptionLogger()
+
 #----------------------------------------------------------
 # Drivers
 #----------------------------------------------------------