Function gitAddAndCommit

web/lib/git.ts:71–105

(files: string[], message: string)

 *   - rev-parse 失败时仍返回 ok，但 commit 字段填 "?" + warning。
 */
export async function gitAddAndCommit(files: string[], message: string): Promise<CommitResult> {
  if (files.length === 0) return { ok: false, error: "没有要提交的文件" };

  const safeMsg = sanitizeCommitMessage(message);
  if (!safeMsg) return { ok: false, error: "commit message 为空" };

  const addResult = await runGit(["add", "--", ...files]);
  if (!addResult.ok) return { ok: false, error: `git add 失败: ${addResult.stderr}` };

  // 用 git diff --cached -- ...files 限定到本批文件，避免别处 staged 改动干扰判断
  const diffResult = await runGit(["diff", "--cached", "--quiet", "--", ...files]);
  if (diffResult.ok) {
    // exit 0 表示这批文件无变更
    return { ok: true, noop: true, message: "无实际变更，跳过 commit" };
  }

  // -- ...files 限定本次 commit 仅这些文件，不带走预先 staged 的别的内容
  const commitResult = await runGit(["commit", "-m", safeMsg, "--", ...files]);
  if (!commitResult.ok) {
    return { ok: false, error: `git commit 失败: ${commitResult.stderr}` };
  }

  // 取最新 commit hash；rev-parse 失败时降级为 "?" + warning，仍视为 ok
  const revResult = await runGit(["rev-parse", "HEAD"]);
  const commit = revResult.ok ? revResult.stdout.trim().slice(0, 7) : "?";
  const out: CommitResult = {
    ok: true,
    commit,
    message: safeMsg,
  };
  if (!revResult.ok) {
    out.warning = `rev-parse HEAD 失败: ${revResult.stderr.trim() || "unknown"}`;
  }
  return out;
}