name: Deploy Hakyll website to GitHub Pages using Nix

on:
  push:
  workflow_dispatch:

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

concurrency:
  group: "pages"
  cancel-in-progress: true

jobs:
  build:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v4

      - name: Install Nix
        uses: cachix/install-nix-action@v31
        with:
          github_access_token: ${{ secrets.GITHUB_TOKEN }}

      - name: Build Site using Hakyll
        run: nix build

      - name: Setup Pages
        id: pages
        uses: actions/configure-pages@v5

      - name: Upload Artifact
        uses: actions/upload-pages-artifact@v3
        with:
          path: ./result/dist

  deploy:
    environment:
      name: github-pages
      url: ${{ steps.deployment.outputs.page_url }}
    runs-on: ubuntu-latest
    needs: build
    steps:
      - name: Deploy to GitHub Pages
        id: deployment
        uses: actions/deploy-pages@v4