version-check.js

/**
 * @fileoverview This file compares the current commit SHA against the one
 * of the deployed site. If they are different the build is allowed to
 * continue, otherwise the build is cancelled.
 */

const fetch = require('node-fetch');
const core = require('@actions/core');

const ERROR_MESSAGE = 'NOT FOUND';

/**
 * @returns {Promise<string>}
 */
const getDeployedVersion = () => {
  // @ts-ignore
  return fetch('https://web.dev/version')
    .then((res) => (res.ok ? res.text() : ERROR_MESSAGE))
    .catch(() => ERROR_MESSAGE);
};

(async () => {
  const deployedVersion = await getDeployedVersion();
  const currentVersion = process.env.GITHUB_SHA;

  console.log(`Current version: ${currentVersion}`);
  console.log(`Deployed version: ${deployedVersion}`);

  if (deployedVersion === currentVersion) {
    console.log(
      'The current and deployed versions are the same, stopping build.',
    );
  } else {
    console.log(
      'The current and deployed versions are different, continuing build.',
    );
  }
  core.setOutput('isDifferent', deployedVersion !== currentVersion);
})();