← snapshot

/**
 * Mirror of `RepoPath::is_under`: segment-wise, not string-wise.
 * `src/auth-x` is NOT under `src/auth`, though it is a string prefix.
 */
export function isUnder(path: string, prefix: string): boolean {
  const mine = path.split("/");
  const wanted = prefix.split("/");
  if (wanted.length > mine.length) return false;
  return wanted.every((seg, i) => mine[i] === seg);
}

/** Which of `decisions` govern `path`, given each decision's scope prefixes. */
export function governing<T extends { scope: string[] }>(
  path: string,
  decisions: T[],
): T[] {
  return decisions.filter((d) => d.scope.some((p) => isUnder(path, p)));
}