Attempt at a harness

Author: bertptrs

2024/README.md

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+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()

2024/aoc/__init__.py

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+import importlib
+from abc import ABC, abstractmethod
+from typing import Any, Tuple, cast
+
+
+class Runner(ABC):
+    @classmethod
+    @abstractmethod
+    def run_both(cls, data: str) -> Tuple[Any, Any]:
+        pass
+
+    @classmethod
+    @abstractmethod
+    def part1(cls, data: str) -> Any:
+        pass
+
+    @classmethod
+    @abstractmethod
+    def part2(cls, data: str) -> Any:
+        pass
+
+
+class SeparateRunner(Runner):
+    @classmethod
+    def run_both(cls, data: str) -> Tuple[Any, Any]:
+        return (cls.part1(data), cls.part2(data))
+
+
+class CombinedRunner(Runner):
+    @classmethod
+    def part1(cls, data: str) -> Any:
+        return cls.run_both(data)[0]
+
+    @classmethod
+    def part2(cls, data: str) -> Any:
+        return cls.run_both(data)[1]
+
+
+def get_runner(day: int) -> type[Runner]:
+    runner_module = importlib.import_module(f".day{day}", package=__name__)
+
+    assert issubclass(runner_module.DayRunner, Runner)
+
+    return cast(type[Runner], runner_module.DayRunner)

2024/aoc/__main__.py

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+from typing import Any
+
+from . import SeparateRunner
+
+
+class DayRunner(SeparateRunner):
+    @classmethod
+    def part1(cls, _data: str) -> Any:
+        return "Hello"
+
+    @classmethod
+    def part2(cls, _data: str) -> Any:
+        return "world!"

2024/aoc/days/__init__.py

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+[project]
+name = "aoc-2024"
+version = "0.1.0"
+description = "Advent of Code 2024 solutions programs"
+readme = "README.md"
+requires-python = ">=3.12"
+dependencies = [
+    "click>=8.1.7",
+    "numpy>=2.1.2",
+]
+
+[dependency-groups]
+dev = [
+    "mypy>=1.13.0",
+    "ruff>=0.7.3",
+]
+
+[tool.ruff.lint]
+select = ["F", "E", "I"]
+
+[tool.mypy]
+strict = true