"""Portable compiler discovery for benchmark comparator lanes."""

from __future__ import annotations

import shutil
from pathlib import Path


def find_clang(override: str | None = None) -> str | None:
    candidates = [
        override,
        "/opt/homebrew/opt/llvm@22/bin/clang++",
        "/opt/homebrew/opt/llvm/bin/clang++",
        "/usr/local/opt/llvm/bin/clang++",
        "clang++",
    ]
    for candidate in candidates:
        if not candidate:
            continue
        resolved = shutil.which(candidate)
        if resolved:
            return resolved
        path = Path(candidate)
        if path.is_file():
            return str(path.resolve())
    return None