node-github-webhook-deploy.js

const express = require('express');
const { exec } = require('child_process');

const app = express();
const PORT = process.env.PORT || 3000;
const GITHUB_SECRET = process.env.GITHUB_SECRET_TOKEN;

/**
 *  # Set github webhook to yourdomain.com(:3000 if no proxy)/api/hook ( or adjust route below )
 *  GITHUB_SECRET_TOKEN=your-github-secret-token
 *  PORT=3000
 *  RUN_CMD='cd /my-folder/ && git pull && npm install && pm2 restart'
**/

app.use(express.json());

app.post('/api/hook', (req, res) => {
  const { body, headers } = req;

  // Verify if the request is coming from GitHub
  const isGithubRequest = headers['user-agent'].includes('GitHub-Hookshot');

  if (!isGithubRequest) {
    return res.status(403).send('Forbidden');
  }

  // Verify the event type is "pull_request" and action is "closed"
  const eventType = headers['x-github-event'];
  const action = body.action;

  if (eventType !== 'pull_request' || action !== 'closed') {
    return res.status(204).send('Event not relevant');
  }

  // Verify if the pull request was for the "development" branch
  const branchName = body.pull_request.head.ref;

  if (branchName !== 'development') {
    return res.status(204).send('Branch not relevant');
  }

  // Perform the required actions
  exec(
    process.env.RUN_CMD,
    (error, stdout, stderr) => {
      if (error) {
        console.error(`Error executing commands: ${error}`);
        return res.status(500).send('Internal Server Error');
      }

      console.log(`stdout: ${stdout}`);
      console.error(`stderr: ${stderr}`);

      return res.status(200).send('OK');
    }
  );
});

app.listen(PORT, () => {
  console.log(`Webhook endpoint listening on port ${PORT}`);
});