deploy.yml

name: Deploy to GitHub Pages

on:
  push:
    branches: [main]
  workflow_dispatch:

# Grant the GITHUB_TOKEN permissions to write to gh-pages
permissions:
  contents: read
  pages: write
  id-token: write

# CORRECT CONCURRENCY:
concurrency:
  group: 'pages'
  cancel-in-progress: true

jobs:
  # JOB 1: Build the static site
  build:
    runs-on: ubuntu-latest
    steps:
      - name: 1. Check out repository
        uses: actions/checkout@v4

      - name: 2. Set up Node.js
        uses: actions/setup-node@v4
        with:
          node-version: 20

      # THIS IS THE A.R.C. STACK:
      - name: 3. Set up pnpm
        uses: pnpm/action-setup@v3
        with:
          version: 9 

      - name: 4. Get pnpm cache directory
        id: pnpm-cache
        shell: bash
        run: echo "dir=$(pnpm store path)" >> $GITHUB_OUTPUT

      - name: 5. Setup pnpm cache
        uses: actions/cache@v4
        with:
          path: ${{ steps.pnpm-cache.outputs.dir }}
          key: ${{ runner.os }}-pnpm-store-${{ hashFiles('**/pnpm-lock.yaml') }}
          restore-keys: |
            ${{ runner.os }}-pnpm-store-

      - name: 6. Install dependencies (The Right Way)
        run: pnpm install --frozen-lockfile # CI best practice

      - name: 7. Build the static site
        run: pnpm build

      - name: 8. Upload artifact
        uses: actions/upload-pages-artifact@v3
        with:
          path: ./build # Docusaurus builds to this directory

  # JOB 2: Deploy the built artifact
  deploy:
    environment:
      name: github-pages
      url: ${{ steps.deployment.outputs.page_url }}
    runs-on: ubuntu-latest
    needs: build # This job WAITS for the 'build' job to succeed
    steps:
      - name: Deploy to GitHub Pages
        id: deployment
        uses: actions/deploy-pages@v4
        # This action automatically grabs the artifact from 'build'