#!/usr/bin/env python3
import argparse
from pathlib import Path
from subprocess import run


def parse_args() -> argparse.Namespace:
    parser = argparse.ArgumentParser()
    parser.add_argument("-o", "--output", type=Path)
    return parser.parse_args()


def generate_version() -> str:
    cmd = ["git", "describe", "--abbrev=7", "--tags"]
    version = run(cmd, capture_output=True, text=True).stdout
    return f'T1M {version or "?"}'


def main() -> None:
    args = parse_args()
    version = generate_version()
    args.output.write_text(version)


if __name__ == "__main__":
    main()