updater.mjs

// 注意要安装@actions/github依赖
import { context, getOctokit } from "@actions/github";
import { readFile } from "node:fs/promises";

// 在容器中可以通过env环境变量来获取参数
const octokit = getOctokit(process.env.GITHUB_TOKEN);

const updateRelease = async () => {
  // 获取updater tag的release
  const { data: release } = await octokit.rest.repos.getReleaseByTag({
    owner: context.repo.owner,
    repo: context.repo.repo,
    tag: "updater",
  });
  // 删除旧的的文件
  const deletePromises = release.assets
    .filter((item) => item.name === "latest.json")
    .map(async (item) => {
      await octokit.rest.repos.deleteReleaseAsset({
        owner: context.repo.owner,
        repo: context.repo.repo,
        asset_id: item.id,
      });
    });

  await Promise.all(deletePromises);

  // 上传新的文件
  const file = await readFile("latest.json", { encoding: "utf-8" });

  await octokit.rest.repos.uploadReleaseAsset({
    owner: context.repo.owner,
    repo: context.repo.repo,
    release_id: release.id,
    name: "latest.json",
    data: file,
  });
};

updateRelease();