Attempt at a harness

2024/aoc/__main__.py

@@ -0,0 +1,34 @@
+import datetime
+
+import click
+
+from . import days
+
+
+@click.command()
+@click.option(
+    "-i",
+    "--input",
+    "data",
+    type=click.File(mode="rt", encoding="utf8"),
+    default="-",
+    help="Problem input file",
+)
+@click.option("-t", "--time", is_flag=True, help="Print elapsed time afterwards")
+@click.argument("day", required=True)
+def main(day: int, time: bool, data: str) -> None:
+    runner_class = days.get_runner(day)
+
+    start = datetime.datetime.now()
+
+    part1, part2 = runner_class.run_both(data)
+
+    if time:
+        click.echo(f"Elapsed: {datetime.datetime.now() - start}", err=True)
+
+    click.echo(part1)
+    click.echo(part2)
+
+
+if __name__ == "__main__":
+    main()