Node os, fs & path

import { spawnSync } from "node:child_process";
import fs from "node:fs";
import os from "node:os";
import path from "node:path";

export function expandPath(p: string): string {
  const parts = p.split(path.sep);
  if (parts[0] === "~") {
    parts[0] = os.homedir();
  }
  return parts.join(path.sep);
}

export function findRepoRoot(): string | null {
  const git = spawnSync("git", ["rev-parse", "--show-toplevel"], {
    encoding: "utf8",
  });
  return git.status === 0 ? git.stdout.split("\n")[0] || null : null;
}