async function _main()

in tools/lighthouse-audit.js [64:114]

• 35 lines of code
• 6 McCabe index (conditional complexity)

async function _main(args) {
  const {url, minScores, logFile} = parseInput(args);
  const isOnHttp = /^http:/.test(url);
  /**
   * @type {LH.Flags}
   */
  const lhFlags = {
    ...LIGHTHOUSE_FLAGS,
    onlyCategories : Object.keys(minScores).sort()
  };
  /**
   * @type {LH.Config.Json}
   */
  const lhConfig = {
    extends : 'lighthouse:default',
    // Since the Angular ServiceWorker waits for the app to stabilize before
    // registering, wait a few seconds after load to allow Lighthouse to
    // reliably detect it.
    passes :
        [ {passName : 'defaultPass', pauseAfterLoadMs : WAIT_FOR_SW_DELAY} ],
  };

  console.log(`Running web-app audits for '${url}'...`);
  console.log(`  Audit categories: ${lhFlags.onlyCategories.join(', ')}`);

  // If testing on HTTP, skip HTTPS-specific tests.
  // (Note: Browsers special-case localhost and run ServiceWorker even on HTTP.)
  if (isOnHttp) {
    skipHttpsAudits(lhConfig);
  }

  logger.setLevel(lhFlags.logLevel);

  try {
    console.log();
    const startTime = Date.now();
    const results = await launchChromeAndRunLighthouse(url, lhFlags, lhConfig);
    if (!results) {
      onError('Lighthouse failed to return any results.');
    }
    const success = await processResults(results, minScores, logFile);
    console.log(
        `\n(Completed in ${((Date.now() - startTime) / 1000).toFixed(1)}s.)\n`);

    if (!success) {
      onError('One or more scores are below the minimum required.');
    }
  } catch (err) {
    onError(err);
  }
}