nixos-and-flakes-book/.github/workflows/release-pdf.yml

name: "Release PDF"
on:
  push:
    tags:
      - "v*.*.*"

jobs:
  generate-pdf:
    runs-on: ubuntu-latest
    steps:
    - name: Checkout repository
      uses: actions/checkout@v4
    - name: Install nix
      uses: cachix/install-nix-action@v23
      with:
        nix_path: "nixpkgs=channel:nixpkgs-unstable"
        extra_nix_config: |
          experimental-features = nix-command flakes
          access-tokens = github.com=${{ secrets.GITHUB_TOKEN }}
    - name: Show nixpkgs version
      run: nix-instantiate --eval -E '(import <nixpkgs> {}).lib.version'
    - name: Run a command with nix develop
      run: |
        nix develop .#export-pdf --ignore-environment --command bash -c '
          pnpm install
          pnpm export-pdf
        '
    # # For debugging, upload the pdfs as artifacts
    # - uses: actions/upload-artifact@v3
    #   with:
    #     name: pdf
    #     path: '*.pdf'
    - name: Generate changelog
      run: |
        # Get the previous tag
        git fetch --tags
        PREVIOUS_TAG=$(git tag --sort=-creatordate | head -n 2 | tail -n 1)
        # Generate the changelog
        git log --pretty=format:"%h %s" $PREVIOUS_TAG..HEAD > CHANGELOG

        echo "Changelog from $PREVIOUS_TAG to HEAD:"
        cat CHANGELOG
    - name: Release PDF
      uses: softprops/action-gh-release@v1
      if: startsWith(github.ref, 'refs/tags/')
      with:
        generate_release_notes: true
        body_path: CHANGELOG
        files: |
          nixos-and-flakes-book.pdf