feat: use lighthouse v3 (#19)

Author: baocancode

README.md

@@ -9,7 +9,7 @@ This README is for version 3.x. To see version 2.x, visit https://github.com/joy
 ## Installation
 
 ```bash
-$ npm install lighthouse-lambda --save
+$ npm install lighthouse-lambda@3.0.0-rc.1 --save
 ```
 
 The postinstall script of `lighthouse-lambda` will download a Headless Chrome binary if it does not already exist. The binary is from [joytocode/headless-chrome-builder](https://github.com/joytocode/headless-chrome-builder) and is tested to make sure it works with Lighthouse.
@@ -24,12 +24,10 @@ const createLighthouse = require('lighthouse-lambda')
 exports.handler = function (event, context, callback) {
   Promise.resolve()
     .then(() => createLighthouse('https://example.com', { logLevel: 'info' }))
-    .then(({ chrome, start, createReport }) => {
+    .then(({ chrome, start }) => {
       return start()
         .then((results) => {
           // Do something with `results`
-          const html = createReport(results)
-          // Do something with the html report
           return chrome.kill().then(() => callback(null))
         })
         .catch((error) => {
@@ -73,9 +71,7 @@ Returns a `Promise` of an Object with the following fields:
 
 - `chrome`: an instance of [`chromeLauncher.launch()`](https://github.com/GoogleChrome/chrome-launcher#launchopts).
 - `log`: an instance of [lighthouse-logger](https://github.com/GoogleChrome/lighthouse/tree/master/lighthouse-logger) (only if you set `options.logLevel`).
-- `start(options)`: a function to start the scan which returns a `Promise` of Lighthouse results.
-  - `options.saveArtifacts`: a flag to indicate whether result artifacts should be saved (default: `false`).
-- `createReport(results)`: a function to create html report from Lighthouse results.
+- `start()`: a function to start the scan which returns a `Promise` of Lighthouse results.
 
 ## License
 

lib/index.js

@@ -1,10 +1,10 @@
 const path = require('path')
 const chromeLauncher = require('chrome-launcher')
 const lighthouse = require('lighthouse')
-const ReportGenerator = require('lighthouse/lighthouse-core/report/v2/report-generator')
 const chromeConfig = require('./chromeConfig')
 
 module.exports = function createLighthouse (url, options = {}, config) {
+  options.output = options.output || 'html'
   const log = options.logLevel ? require('lighthouse-logger') : null
   if (log) {
     log.setLevel(options.logLevel)
@@ -17,20 +17,9 @@ module.exports = function createLighthouse (url, options = {}, config) {
       return {
         chrome,
         log,
-        createReport,
-        start ({ saveArtifacts = false } = {}) {
+        start () {
           return lighthouse(url, options, config)
-            .then((results) => {
-              if (!saveArtifacts) {
-                delete results.artifacts
-              }
-              return results
-            })
         }
       }
     })
 }
-
-function createReport (results) {
-  return new ReportGenerator().generateReportHtml(results)
-}