Update log file path and add logging to service

- Updated the `parse_args()` function to include a new argument `--logfile`, which allows users to specify a custom log file. The default value is "none".
- Modified the `main()` function to check if the user provided a log file using the `--logfile` argument. If a log file is specified, it adds a FileHandler to the logger and sets the logging level based on the `--loglevel` argument.
- Updated the `remindme_caldav.service` file to include the `--logfile` argument in the `ExecStart` command. This ensures that the log file is used when the service starts.

remindme_caldav.py

@@ -12,25 +12,17 @@ from pathlib import Path
 import argparse, textwrap, logging
 from alert_processor import AlertProcessor
 
-#Setup basic logging.
 log_format='[%(levelname)s] %(asctime)s %(message)s'
 logging.basicConfig(format=log_format, level=logging.INFO)
 logger = logging.getLogger()
-file_handler = logging.FileHandler('log', mode='a')
-formatter = logging.Formatter(log_format)
-file_handler.setFormatter(formatter)
-logger.addHandler(file_handler)
 
 def parse_args():
     """Parse command line arguments."""
     parser = argparse.ArgumentParser(description="A simple calendar alerting daemon written in Python")
     parser.add_argument('--config', type=str, help='Path to config file. Must be .toml')
+    parser.add_argument('--logfile', type=str, help='Path to logfile file. Default logfile', default = "none")
     parser.add_argument('--loglevel', choices=['info', 'INFO', 'WARNING', 'ERROR', 'CRITICAL'], default='INFO', help='Set the logging level')
-    args = parser.parse_args()
-    if args.config is None:
-        logger.error("No config file provided. Please use --config path_to_config.toml")
-        sys.exit(1)
-    return args
+    return parser.parse_args()
 
 def read_file(filename):                                       
     try:                                                       
@@ -355,8 +347,20 @@ def process_alert(current_time, next_alert, next_event, event, config):
 def main():
     # Parse args and config
     args = parse_args()
-    content = read_file(args.config)
-    config = parse_toml(content)
+    if args.logfile != "none":
+        file_handler = logging.FileHandler(args.logfile, mode='a')
+        formatter = logging.Formatter(log_format)
+        file_handler.setFormatter(formatter)
+        logger.addHandler(file_handler)
+
+    if args.config is None:
+        logger.error("No config file provided. Please use --config path_to_config.toml")
+        sys.exit(1)
+
+    config_file = read_file(args.config)
+    config = parse_toml(config_file)
+    
+    # Write logs to logfile
    
     # Get calendar dir
     cal_dir = Path(config["app"]["calendar_dir"])

remindme_caldav.service

@@ -8,7 +8,7 @@ Type=simple
 Restart=always
 RestartSec=1
 User=root
-ExecStart=/opt/remindme_caldav/.venv/bin/python3 -u /opt/remindme_caldav/remindme_caldav.py --config /etc/remindme_caldav/config.toml
+ExecStart=/opt/remindme_caldav/.venv/bin/python3 -u /opt/remindme_caldav/remindme_caldav.py --config /etc/remindme_caldav/config.toml --logfile /opt/remindme_caldav/log
 Environment="PYTHONUNBUFFERED=1"
 
 [Install]