name: Build and Deploy Book

on:
  push:
    branches: [main]

# Sets permissions of the GITHUB_TOKEN to allow deployment to GitHub Pages
permissions:
  contents: read
  pages: write
  id-token: write

# Allow only one concurrent deployment, skipping runs queued between the run in-progress and latest queued.
# However, do NOT cancel in-progress runs as we want to allow these production deployments to complete.
concurrency:
  group: "pages"
  cancel-in-progress: false

jobs:
  deploy:
    environment:
      name: github-pages
      url: ${{ steps.deployment.outputs.page_url }}
    runs-on: ubuntu-latest
    steps:
      - name: Checkout sources
        uses: actions/checkout@v4
      - name: Install Nix
        uses: cachix/install-nix-action@v24
        with:
          nix_path: nixpkgs=channel:nixos-unstable
      - name: Build documentation
        run: nix develop --command just book
      - name: Setup Pages
        uses: actions/configure-pages@v4
      - name: Upload artifact
        uses: actions/upload-pages-artifact@v3
        with:
          path: docs/book
      - name: Deploy to GitHub Pages
        id: deployment
        uses: actions/deploy-pages@v4
