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70 changes: 70 additions & 0 deletions .github/scripts/lighthouse-report.js
Original file line number Diff line number Diff line change
@@ -0,0 +1,70 @@
const fs = require('fs');
const path = require('path');

const dir = '.lighthouseci';
const files = fs.readdirSync(dir).filter(file => file.endsWith('.report.json'));

if (files.length < 2) {
console.error('❌ Not enough Lighthouse reports found.');
process.exit(1);
}

let mainReport = '';
let prReport = '';

for (const file of files) {
const json = JSON.parse(fs.readFileSync(path.join(dir, file), 'utf8'));
const url = json.finalUrl;

if (url.includes('3000')) mainReport = json;
else if (url.includes('3001')) prReport = json;
}

function extract(report) {
return {
performance: report.categories.performance.score * 100,
accessibility: report.categories.accessibility.score * 100,
bestPractices: report.categories['best-practices'].score * 100,
seo: report.categories.seo.score * 100,
};
}

const main = extract(mainReport);
const pr = extract(prReport);

const md = `
**🔍 Lighthouse Scores**

<table>
<tr>
<th>Metric</th>
<th>⚡ PR Branch</th>
<th>📦 Main Branch</th>
</tr>
<tr>
<td>Performance</td>
<td>${pr.performance}</td>
<td>${main.performance}</td>
</tr>
<tr>
<td>Accessibility</td>
<td>${pr.accessibility}</td>
<td>${main.accessibility}</td>
</tr>
<tr>
<td>Best Practices</td>
<td>${pr.bestPractices}</td>
<td>${main.bestPractices}</td>
</tr>
<tr>
<td>SEO</td>
<td>${pr.seo}</td>
<td>${main.seo}</td>
</tr>
</table>
`;


fs.writeFileSync('lighthouse-comment.md', md);
console.log('✅ Comment written to lighthouse-comment.md');

37 changes: 22 additions & 15 deletions .github/workflows/lighthouse.yml
Original file line number Diff line number Diff line change
Expand Up @@ -9,40 +9,47 @@ jobs:
lighthouse:
runs-on: ubuntu-latest
steps:
- name: Checkout PR branch
uses: actions/checkout@v4
- uses: actions/checkout@v4

- name: Set up Node.js
uses: actions/setup-node@v4
with:
node-version: 18

- name: Install static server
run: npm install -g serve
- run: npm install -g serve

- name: Serve PR branch (background on port 3001)
- name: Serve PR branch (port 3001)
run: |
serve . -l 3001 &
sleep 5

- name: Checkout main branch into separate folder
run: |
git fetch origin main
git worktree add main-branch origin/main
- name: Serve Main branch (background on port 3000)

- name: Serve Main branch (port 3000)
run: |
cd main-branch
serve . -l 3000 &
cd ..
sleep 5

- name: Create output directory for Lighthouse
run: mkdir -p ${{ github.workspace }}/tmp/artifacts
- name: Run Lighthouse audits
uses: treosh/lighthouse-ci-action@v12
with:
urls: |
http://localhost:3000/
http://localhost:3001/
uploadArtifacts: true
temporaryPublicStorage: true

- name: Parse reports and generate comment
run: node .github/scripts/lighthouse-report.js

- name: Run Lighthouse audit for both PR and Main
uses: foo-software/lighthouse-check-action@master
- name: Comment on PR with Lighthouse scores
uses: peter-evans/create-or-update-comment@v4
with:
gitAuthor: ${{ github.actor }}
gitBranch: ${{ github.head_ref }}
outputDirectory: ${{ github.workspace }}/tmp/artifacts
urls: 'http://localhost:3000/?branch=main,http://localhost:3001/?branch=pr'
sha: ${{ github.sha }}
token: ${{ secrets.GITHUB_TOKEN }}
issue-number: ${{ github.event.pull_request.number }}
body-path: lighthouse-comment.md
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