frontend-bundle-analysis.yml

name: Frontend Bundle Analysis

on:
  pull_request:
  push:
    branches: [v3]
  workflow_dispatch:

defaults:
  run:
    working-directory: ./

jobs:
  analyze:
    name: Frontend Analyze Bundle
    runs-on: ubuntu-latest
    env:
      TURBO_TOKEN: ${{ secrets.TURBO_TOKEN }}
      TURBO_TEAM: ${{ vars.TURBO_TEAM }}

    steps:
      - name: Cancel Previous Runs
        uses: styfle/cancel-workflow-action@0.12.0
        with:
          access_token: ${{ github.token }}

      - uses: actions/checkout@v4

      - name: Cache turbo build setup
        uses: actions/cache@v3
        with:
          path: .turbo
          key: ${{ runner.os }}-turbo-${{ github.sha }}
          restore-keys: |
            ${{ runner.os }}-turbo-

      - uses: pnpm/action-setup@v2.4.0

      - name: Install Node.js
        uses: actions/setup-node@v4
        with:
          node-version: 18
          cache: 'pnpm'

      - name: Install Dependencies
        run: pnpm install

      - name: Restore Next.js Build
        uses: actions/cache@v3
        id: restore-build-cache
        env:
          cache-name: cache-next-build
        with:
          # if you use a custom build directory, replace all instances of `.next` in this file with your build directory
          # ex: if your app builds to `dist`, replace `.next` with `dist`
          path: packages/frontend/.next/cache
          # change this if you prefer a more strict cache
          key: ${{ runner.os }}-build-${{ env.cache-name }}

      - name: Build Next.js App
        # change this if your site requires a custom build command
        run: pnpm run build:frontend

      # Here's the first place where next-bundle-analysis' own script is used
      # This step pulls the raw bundle stats for the current bundle
      - name: Analyze Bundle
        run: cd packages/frontend && npx -p nextjs-bundle-analysis report

      - name: Upload bundle
        uses: actions/upload-artifact@v3
        with:
          name: bundle
          path: packages/frontend/.next/analyze/__bundle_analysis.json

      - name: Download Base Branch Bundle Stats
        uses: dawidd6/action-download-artifact@v2
        if: success() && github.event.number
        with:
          workflow: nextjs-bundle-analysis.yml
          branch: ${{ github.event.pull_request.base.ref }}
          path: packages/frontend/.next/analyze/base

      # And here's the second place - this runs after we have both the current and
      # base branch bundle stats, and will compare them to determine what changed.
      # There are two configurable arguments that come from package.json:
      #
      # - budget: optional, set a budget (bytes) against which size changes are measured
      #           it's set to 350kb here by default, as informed by the following piece:
      #           https://infrequently.org/2021/03/the-performance-inequality-gap/
      #
      # - red-status-percentage: sets the percent size increase where you get a red
      #                          status indicator, defaults to 20%
      #
      # Either of these arguments can be changed or removed by editing the `nextBundleAnalysis`
      # entry in your package.json file.
      - name: Compare with Base Branch Bundle
        if: success() && github.event.number
        run:
          ls -laR packages/frontend/.next/analyze/base && cd packages/frontend
          && npx -p nextjs-bundle-analysis compare

      - name: Get Comment Body
        id: get-comment-body
        if: success() && github.event.number
        run: |
          body=$(cat packages/frontend/.next/analyze/__bundle_analysis_comment.txt)
          body="${body//'%'/'%25'}"
          body="${body//$'\n'/'%0A'}"
          body="${body//$'\r'/'%0D'}"
          echo ::set-output name=body::$body

      - name: Find Comment
        uses: peter-evans/find-comment@v2
        if: success() && github.event.number
        id: fc
        with:
          issue-number: ${{ github.event.number }}
          body-includes: <!-- __NEXTJS_BUNDLE

      - name: Create Comment
        uses: peter-evans/create-or-update-comment@v3.1.0
        if: success() && github.event.number && steps.fc.outputs.comment-id == 0
        with:
          issue-number: ${{ github.event.number }}
          body: ${{ steps.get-comment-body.outputs.body }}

      - name: Update Comment
        uses: peter-evans/create-or-update-comment@v3.1.0
        if: success() && github.event.number && steps.fc.outputs.comment-id != 0
        with:
          issue-number: ${{ github.event.number }}
          body: ${{ steps.get-comment-body.outputs.body }}
          comment-id: ${{ steps.fc.outputs.comment-id }}
          edit-mode: replace