Take config file as command line argument

octoprint_reservations/main.py

@@ -1,6 +1,8 @@
 #!/usr/bin/env python3
 
+import argparse
 from datetime import datetime, timedelta
+import pathlib
 
 from octorest import OctoRest
 from ruamel.yaml import YAML
@@ -37,10 +39,19 @@ def get_printer_job(calendar, printer):
 
 
 def main():
+    parser = argparse.ArgumentParser(description="Process some integers.")
+    parser.add_argument(
+        "--config",
+        type=pathlib.Path,
+        default="printers.yaml",
+        help="A yaml file defining printers to query (default: %(default)s)",
+    )
+    args = parser.parse_args()
+
     calendar = CalendarService()
 
     yaml = YAML(typ="safe")
-    with open("printers.yaml") as f:
+    with open(args.config) as f:
         printers = yaml.load(f)
 
     for printer in printers: