name: "Build project site"
on:
  push:
    branches:
      - master
    paths:
      - docs/
jobs:
  build:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v3
      - uses: DeterminateSystems/magic-nix-cache-action@v2
      - uses: DeterminateSystems/nix-installer-action@v4
      - env:
          NIXPKGS_ALLOW_UNFREE: "1"
        run: nix develop .#docs --impure -c hugo -s ./docs/
      - uses: actions/upload-pages-artifact@v1
        with:
          path: "docs/public"
          retention-days: 7

  deploy:
    needs: build
    permissions:
      pages: write
      id-token: write
    environment:
      name: github-pages
      url: ${{ steps.deployment.outputs.page_url }}
    runs-on: ubuntu-latest
    steps:
      - name: Deploy to GitHub Pages
        id: deployment
        uses: actions/deploy-pages@v2