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#!/usr/bin/env python3
import subprocess
import argparse


def get_targets_of_rule(build_root: str, rule_name: str) -> list[str]:
    return (
        subprocess.check_output(["ninja", "-C", build_root, "-t", "targets", "rule", rule_name])
        .decode()
        .strip()
        .splitlines()
    )


def ninja_build(build_root: str, targets: list[str]):
    subprocess.check_call(["ninja", "-C", build_root, "--", *targets])


def main():
    ap = argparse.ArgumentParser(description="Builds required targets for clang-tidy")
    ap.add_argument("build_root", help="Ninja build root", type=str)

    args = ap.parse_args()

    targets = (
        [t for t in get_targets_of_rule(args.build_root, "CUSTOM_COMMAND") if t.endswith(".gen.hh")]
        + [
            t
            for t in get_targets_of_rule(args.build_root, "CUSTOM_COMMAND_DEP")
            if t.endswith(".capnp.h")
        ]
        + [
            t
            for t in get_targets_of_rule(args.build_root, "CUSTOM_COMMAND")
            if t.endswith(".gen.inc")
        ]
    )
    ninja_build(args.build_root, targets)


if __name__ == "__main__":
    main()