import { spawn } from "node:child_process";

export interface GitSpawnResult {
  readonly code: number;
  readonly stdout: string;
  readonly stderr: string;
}

export const runGit = (args: readonly string[], cwd: string): Promise<GitSpawnResult> => {
  return new Promise((resolve, reject) => {
    const child = spawn("git", [...args], {
      cwd,
      env: process.env,
    });
    const out: Buffer[] = [];
    const err: Buffer[] = [];
    child.stdout.on("data", (chunk: Buffer) => {
      out.push(chunk);
    });
    child.stderr.on("data", (chunk: Buffer) => {
      err.push(chunk);
    });
    child.on("error", (e) => {
      reject(e);
    });
    child.on("close", (code) => {
      resolve({
        code: code ?? 1,
        stdout: Buffer.concat(out).toString("utf8"),
        stderr: Buffer.concat(err).toString("utf8"),
      });
    });
  });
};