A small script to update webdriver if needed prior to running protractor.

webdriverUpdate.js

const isWebdriverUpToDate = () => {
  const fs = require('fs');
  const path = require('path');
  const SeleniumConfig = require('webdriver-manager/built/lib/config').Config;

  const updateJson = path.resolve(SeleniumConfig.getSeleniumDir(), 'update-config.json');
  return fs.existsSync(updateJson);
};

const updateWebdriver = () => {
  const { spawnSync } = require('child_process');

  spawnSync('yarn', ['webdriver:update']);
};

if (!isWebdriverUpToDate()) {
  console.log('Webdriver updating...');
  updateWebdriver();
  console.log('Webdriver updated.');
} else {
  console.log('Webdriver up to date.');
}

In use:

{
  "scripts": {
    "webdriver:update": "webdriver-manager update --versions.chrome=2.40",
    "webdriver:upsert": "node ./scripts/tasks/upsertWebdriver.js",
    "cucumber": "npm run webdriver:upsert && protractor test/protractor_conf_cucumber.js --baseUrl http://localhost:3000/",
  }
}