name: Check flake

on:
  push:
  pull_request:

jobs:
  check:
    runs-on: ubuntu-22.04
    permissions:
      contents: read
      id-token: write
    steps:
      - name: Free Disk Space (Ubuntu)
        uses: jlumbroso/free-disk-space@v1.3.1
      - uses: actions/checkout@v4
      - name: Check Nix flake Nixpkgs inputs
        uses: DeterminateSystems/flake-checker-action@main
      - uses: DeterminateSystems/nix-installer-action@main
      - uses: DeterminateSystems/magic-nix-cache-action@main
      - name: Build select system configurations.
        run: |
          # nix flake check --all-systems
          nix build .#nixosConfigurations.demeter.config.system.build.toplevel