bundle-size-analysis.yml

name: Bundle Size Analysis

on:
  pull_request:
    branches: [main]
    paths:
      - 'package.json'
      - 'bun.lockb'
      - '.github/workflows/bundle-size-analysis.yml'

permissions:
  contents: read
  pull-requests: write
  issues: write

jobs:
  build:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      
      - name: Setup Bun
        uses: oven-sh/setup-bun@v1
        with:
          bun-version: latest

      - name: Install dependencies
        run: bun install

      - name: Build PR branch with stats
        run: |
          VITE_BUNDLE_ANALYZE=true bun run build --mode production

      - name: Save stats as artifact                                                                                      
        if: success()                                                                                                     
        uses: actions/upload-artifact@v3                                                                                  
        with:                                                                                                             
          name: bundle-stats                                                                                              
          path: dist/stats.html                                                                                           

      - name: Checkout main branch                                                                                        
        uses: actions/checkout@v4                                                                                         
        with:                                                                                                             
          ref: main                                                                                                       
          path: main-branch                                                                                               
                                                                                                                          
      - name: Build main branch stats                                                                                     
        run: |                                                                                                            
          cd main-branch                                                                                                  
          bun install                                                                                                     
          VITE_BUNDLE_ANALYZE=true bun run build --mode production                                                        
          cd ..                                                                                                           


      - name: Generate bundle stats
        id: bundle-stats
        run: |
          node scripts/generate_bundle_stats.js dist/stats.html main-branch/dist/stats.html
          echo 'STATS_CONTENT<<EOF' >> $GITHUB_ENV
          cat dist/bundle_stats.md >> $GITHUB_ENV
          echo 'EOF' >> $GITHUB_ENV

      - name: Read and post stats                                                                                         
        if: success()                                                                                                     
        uses: mshick/add-pr-comment@v2                                                                                    
        with:                                                                                                             
          message: |                                                                                                      
            ## 📊 Bundle Size Analysis                                                                                    
                                                                                                                          
            ${{ env.STATS_CONTENT }}                                                                      
                                                                                                                          
            <details>                                                                                                     
            <summary>What is this?</summary>                                                                              
            This is an automated bundle size report generated during the build process.
            </details>                                                                                                    
          proxy-url: https://add-pr-comment-proxy-tscircuit.vercel.app/api                                                
          repo-token: ${{ secrets.GITHUB_TOKEN }}                                                                         
          allow-repeats: false