github-glitch-sync/index.js

Utility tool to reduce your glitch code boilerplate, and simplify GitHub <-> Glitch sync.

const {exec} = require("child_process");
const {promisify} = require("util");
const execPromise = promisify(exec);
const express = require("express");

const {GITHUB_USER_EMAIL, GITHUB_USER_NAME, GITHUB_USER_TOKEN} = process.env;

function initialize(expressApp, {hookUrl = "/github-sync-hook", branch = "master", user = {}} = {}) {
  expressApp.use(hookUrl, express.json())
  expressApp.post(hookUrl, function (req, res) {

    if (isGithubPushEvt(req)) {
      const {repository: {clone_url: origin}, head_commit} = req.body;

      console.log(`github-glitch-sync: New Commit 🎉
${head_commit.message} / (email: ${head_commit.author.email})`);
      setupGitHub(user, origin)
          .then(() => performGitHubFetch(branch))
          .then(refreshGlitchProject)
    }
    return res.sendStatus(200);
  });

}

function setupGitHub(user, origin) {
  const {email = GITHUB_USER_EMAIL, name: username = GITHUB_USER_NAME, token = GITHUB_USER_TOKEN} = user || {};

  console.log(`user: `, user);
  console.log({email, username, token, origin});

  const authOrigin = origin.replace("://", `://${username}:${token}@`);
  console.log(`authOrigin: `, authOrigin);


  return execPromise(`git config user.name "${username}"`)
      .then(() => execPromise(`git config user.email "${email}"`))
      .then(() => execPromise(`git config remote.origin.url >&- || git remote add origin ${authOrigin}`))
}

function performGitHubFetch(branch) {
  return execPromise(`git fetch origin ${branch}`)
      .then(() => execPromise(`git reset --hard origin/${branch}`))
      .then(() => execPromise(`git pull origin ${branch}`))
}

function refreshGlitchProject() {
  return execPromise("refresh");
}

function isGithubPushEvt(req) {
  return (req.headers['x-github-event'] === "push")
}

module.exports = {initialize};