name: Deploy documentation
on:
  push:
    branches:
      - main
      - docs-snapshot
  workflow_dispatch: {}
  release:
    types:
      - released

permissions:
  contents: read
  pages: write
  id-token: write

concurrency:
  group: "pages"
  cancel-in-progress: true
  
jobs:
  snapshot-docs:
    name: Snapshot documentation
    runs-on: ubuntu-latest
    permissions:
      contents: write
    steps:
      - name: Checkout
        uses: actions/checkout@v4
        # Run on releases only
        if: ${{ github.event.release }}
        with:
          ref: ${{ github.ref }}
          fetch-depth: 0
          fetch-tags: true
      - name: Merge with existing branch
        # Run on releases only
        if: ${{ github.event.release }}
        run: |
          git config --global user.name "GitHub Actions"
          git config --global user.email "github-actions@nadena.dev"
          git merge -s ours origin/docs-snapshot
          git push origin HEAD:docs-snapshot
  
  build-docs:
    name: Build documentation (latest release)
    uses: bdunderscore/modular-avatar/.github/workflows/build-test-docs.yml@main
    needs:
      - snapshot-docs
    with:
      ref: docs-snapshot
    
  build-docs-dev:
    name: Build documentation (main branch)
    uses: bdunderscore/modular-avatar/.github/workflows/build-test-docs.yml@main
    with:
      ref: main
      path: dev
      artifact: docs-dev
  deploy-docs:
    name: Deploy documentation
    needs: 
      - build-docs
      - build-docs-dev
    environment:
      name: github-pages
      url: ${{ steps.deployment.outputs.page_url }}
    runs-on: ubuntu-latest

    steps:
      - name: Download artifact
        uses: actions/download-artifact@v3
        with:
          name: docs
          path: docs/build
      - name: Download artifact
        uses: actions/download-artifact@v3
        with:
          name: docs-dev
          path: docs/build/dev

      - name: Dump file listing
        run: |
          ls -lR docs/build

      - name: Unpack documentation
        run: |
          tar -xf docs/build/docs.tar -C docs/build
          tar -xf docs/build/dev/docs.tar -C docs/build/dev
          rm -f docs/build/docs.tar docs/build/dev/docs.tar

      - name: Setup Pages
        uses: actions/configure-pages@v3

      - name: Upload artifact
        uses: actions/upload-pages-artifact@v2
        with:
          path: docs/build

      - name: Deploy to GitHub Pages
        id: deployment
        uses: actions/deploy-pages@v2