nextjs_bundle_analysis.yml

# Copyright (c) HashiCorp, Inc.
# SPDX-License-Identifier: MPL-2.0

name: 'Next.js Bundle Analysis'

on:
  pull_request:
  push:
    branches:
      - dev

permissions:
  contents: read # for checkout repository
  actions: read # for fetching base branch bundle stats
  pull-requests: write # for comments

jobs:
  analyze:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v3

      - name: Install dependencies
        uses: ./.github/workflows/yarn

      - name: Build next.js app
        uses: ./.github/workflows/build
        with:
          secrets: ${{ toJSON(secrets) }}

      - name: Analyze bundle
        run: npx -p nextjs-bundle-analysis report

      - name: Upload bundle
        uses: actions/upload-artifact@v3
        with:
          name: bundle
          path: .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: .next/analyze/base

      - name: Compare with base branch bundle
        if: success() && github.event.number
        run: ls -laR .next/analyze/base && npx -p nextjs-bundle-analysis compare

      - name: Get Comment Body
        id: get-comment-body
        if: success() && github.event.number
        # https://docs.github.com/en/actions/using-workflows/workflow-commands-for-github-actions#multiline-strings
        run: |
          echo "body<<EOF" >> $GITHUB_OUTPUT
          echo "$(cat .next/analyze/__bundle_analysis_comment.txt)" >> $GITHUB_OUTPUT
          echo EOF >> $GITHUB_OUTPUT

      - name: Comment
        uses: marocchino/sticky-pull-request-comment@v2
        with:
          header: next-bundle-analysis
          message: ${{ steps.get-comment-body.outputs.body }}