nix-flake-check.yaml

name: Check and build

on:
    pull_request:
    push:
        branches:
            - master
jobs:
    dependencies:
        name: Build dependencies
        runs-on: ubuntu-latest
        outputs:
            version: ${{ steps.version.outputs.version }}

        steps:
            - name: Set up Git repository
              uses: actions/checkout@v3

            - name: Create global variables
              id: version
              run:
                  echo "version=$(git rev-parse --short HEAD)" >> $GITHUB_OUTPUT

    determine-matrix:
        name: Figure out the packages we need to build
        runs-on: ubuntu-latest
        needs: [dependencies]

        outputs:
            matrix: ${{ steps.set-matrix.outputs.matrix }}

        steps:
            - name: Set up Git repository
              uses: actions/checkout@v3

            - name: Install the Nix package manager
              uses: cachix/install-nix-action@v20

            - id: set-matrix
              run: |
                  echo "matrix=$(
                    nix eval --json .#packages.x86_64-linux --apply builtins.attrNames
                  )" >> $GITHUB_OUTPUT

    build:
        name: Build
        needs: determine-matrix
        runs-on: ubuntu-latest
        strategy:
            matrix:
                packages: ${{fromJson(needs.determine-matrix.outputs.matrix)}}

        steps:
            - name: Set up Git repository
              uses: actions/checkout@v3

            - name: Install Nix
              uses: cachix/install-nix-action@v20

            - name: Nix flake check
              run: nix flake check

            - name: Build ${{ matrix.packages }}.pdf
              run: nix build .#${{ matrix.packages }}