Initial commit

.gitignore

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+node_modules

config.json

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+{
+  "extends": "lighthouse:default",
+  "settings": {
+    "onlyAudits": ["color-contrast"]
+  }
+}

index.js

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+const cheerio = require('cheerio')
+const Crawler = require('simplecrawler')
+const ChildProcess = require('child_process')
+const path = require('path')
+
+const crawler = new Crawler('https://electron.atom.io')
+crawler.respectRobotsTxt = false
+crawler.parseHTMLComments = false
+crawler.parseScriptTags = false
+crawler.maxDepth = 1
+
+crawler.discoverResources = (buffer, item) => {
+  const page = cheerio.load(buffer.toString('utf8'))
+  const links = page('a[href]').map(function () {
+    return page(this).attr('href')
+  }).get()
+
+  return links
+}
+
+crawler.on('fetchcomplete', (queueItem, responseBuffer, response) => {
+  console.log('running lighthouse on ', queueItem.url)
+  runLighthouse(queueItem.url)
+})
+
+function runLighthouse (url) {
+  const lighthouse = ChildProcess.spawn(path.join(__dirname, 'node_modules', '.bin', 'lighthouse'), [
+    url,
+    '--output=json',
+    '--output-path=stdout',
+    '--disable-device-emulation',
+    '--disable-cpu-throttling',
+    '--disable-network-throttling',
+    '--chrome-flags="--headless --disable-gpu"',
+    `--config-path=${path.join(__dirname, 'config.json')}`
+  ])
+
+  let output = ''
+  lighthouse.stdout.on('data', (data) => {
+    output += data
+  })
+  lighthouse.once('close', () => {
+    const report = JSON.parse(output)
+
+    report.reportCategories.forEach((category) => {
+      category.audits.forEach((audit) => {
+        if (audit.score !== 100) {
+          console.log(`${url} failed ${audit.id}`)
+          audit.result.extendedInfo.value.nodes.forEach((result) => {
+            console.log(result.failureSummary)
+            console.log(result.path)
+            console.log(result.html)
+          })
+        }
+      })
+    })
+  })
+}
+
+crawler.start()

package.json

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+{
+  "name": "lightcrawler",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "cheerio": "^1.0.0-rc.1",
+    "lighthouse": "^2.1.0",
+    "simplecrawler": "^1.1.3"
+  }
+}