Add log level command line argument

Signed-off-by: Alek Ratzloff <alekratz@gmail.com>

chanbans/__main__.py

@@ -7,6 +7,8 @@ from .pull import pull
 
 def parse_args():
     parser = argparse.ArgumentParser(description="Run 4chan bans archiver")
+    parser.add_argument('--log-level', choices=['debug', 'info', 'warning', 'error', 'critical'], default='info')
+
     subparsers = parser.add_subparsers(title="Commands", dest="command")
 
     subcommands = set()
@@ -36,7 +38,13 @@ def parse_args():
 
 async def main():
     args = parse_args()
-    logging.basicConfig(level=logging.INFO, format='%(asctime)s %(name)-12s %(levelname)-8s %(message)s')
+    try:
+        level = getattr(logging, args.log_level.upper())
+    except AttributeError:
+        print(f"ERROR: no such logging level {args.log_level}. Exiting")
+        raise SystemExit()
+
+    logging.basicConfig(level=level, format='%(asctime)s %(name)-12s %(levelname)-8s %(message)s')
     match args.command:
         case "pull":
             await pull()