update.js

#!/usr/bin/env node

const fs = require("fs");
const semver = require("semver");
const execSync = require("child_process").execSync;
const currentChromedriverVersion = require("./lib/chromedriver").version;
const currentVersionInPackageJson = require("./package.json").version;

// fetch the latest chromedriver version
async function getLatest() {
  const url = "https://googlechromelabs.github.io/chrome-for-testing/last-known-good-versions.json";
  try {
    const res = await fetch(url);
    const data = await res.json();
    return data?.channels?.Stable?.version;
  } catch (err) {
    console.error(err);
    process.exit(1);
  }
}

/* Provided a new Chromedriver version such as 77.0.3865.40:
   - update the version inside the ./lib/chromedriver helper file e.g. const version = '77.0.3865.40';
   - bumps package.json version number
   - add a git tag using the new node-chromedriver version
   - add a git commit, e.g. Bump version to 77.0.0
*/
async function writeUpdate(newVersion, shouldCommit) {
  const helper = fs.readFileSync("./lib/chromedriver.js", "utf8");
  const versionExport = "const version";
  const regex = new RegExp(`^.*${versionExport}.*$`, "gm");
  const updated = helper.replace(regex, `${versionExport} = "${newVersion}";`);
  const currentMajor = semver.major(currentVersionInPackageJson);
  const newVersionSemver = semver.coerce(newVersion);
  if (newVersionSemver == null) throw new Error("Invalid version: " + newVersion);
  const newMajor = semver.major(newVersionSemver);
  const version =
    currentMajor !== newMajor
      ? `${newMajor}.0.0`
      : semver.inc(currentVersionInPackageJson, "patch");
  execSync(`npm version ${version} --git-tag-version=false`);
  fs.writeFileSync("./lib/chromedriver.js", updated, "utf8");
  if (!shouldCommit) return;
  execSync("git add :/");
  execSync(`git commit -m "Bump version to ${version}"`);
  execSync(`git tag -s ${version} -m ${version}`);
}

async function run(shouldCommit) {
  try {
    const latestVersion = await getLatest();
    if (currentChromedriverVersion === latestVersion) {
      console.log("Chromedriver version is up to date.");
    } else {
      await writeUpdate(latestVersion, shouldCommit);
      console.log(`Chromedriver version updated to ${latestVersion}`);
    }
  } catch (err) {
    console.error(err);
    process.exit(1);
  }
}

const shouldCommit = process.argv.indexOf("--no-commit") == -1;
run(shouldCommit);