adds rotation and overwriting logging

I underestimated the amount of logs generated. This should keep it
within limits most of the time. Might still be a lot of logs, but at
least there's an upper limit now.

bin/vcmp

@@ -7,6 +7,7 @@ import sys
 import argparse
 import tempfile
 import logging
+from logging.handlers import RotatingFileHandler
 import time
 import psutil
 from tqdm import tqdm
@@ -79,10 +80,14 @@ def setup_logging(verbose: bool) -> None:
     console_handler.setLevel(log_level)
     console_handler.setFormatter(logging.Formatter('%(asctime)s - %(levelname)s - %(message)s'))
 
-    # Create file handler
-    file_handler = logging.FileHandler(log_file)
+    # Create rotating file handler
+    file_handler = RotatingFileHandler(
+        log_file,
+        backupCount=100
+    )
     file_handler.setLevel(logging.DEBUG)  # Always log everything to file
     file_handler.setFormatter(logging.Formatter('%(asctime)s - %(levelname)s - %(message)s'))
+    file_handler.doRollover()
 
     # Set up root logger
     root_logger = logging.getLogger()
@@ -176,7 +181,7 @@ def run(filepath: pathlib.Path, cmd: list[str], temp_path: pathlib.Path, file_in
     ffmpeg_log_path = pathlib.Path(xdg_state_home) / 'vcmp' / 'ffmpeg.log'
     ffmpeg_log_path.parent.mkdir(parents=True, exist_ok=True)
 
-    with open(ffmpeg_log_path, 'a') as log_file:
+    with open(ffmpeg_log_path, 'w') as log_file:
         process = subprocess.Popen(
             cmd,
             stdout=subprocess.PIPE,