name: Check NixOS Config

on:
  pull_request:
  push:
    branches: [main]
  workflow_dispatch:

jobs:
  build:
    runs-on: ubuntu-latest

    steps:
      - name: Checkout
        uses: actions/checkout@v4

      - name: Free disk space
        run: |
          sudo rm -rf /usr/share/dotnet /usr/share/swift /usr/local/lib/android \
            /opt/ghc /opt/hostedtoolcache/CodeQL /usr/local/share/boost \
            "$AGENT_TOOLSDIRECTORY"
          sudo docker image prune --all --force || true
          df -h

      - name: Install Nix
        uses: cachix/install-nix-action@v27
        with:
          nix_path: nixpkgs=channel:nixos-unstable
          extra_nix_config: |
            experimental-features = nix-command flakes
            accept-flake-config = true

      - name: Setup Cachix
        uses: cachix/cachix-action@v15
        with:
          name: chexit   
          authToken: ${{ secrets.CACHIX_AUTH_TOKEN }}

      - name: Check flake syntax
        run: nix flake check --no-build

      - name: Build system config
        run: |
          nix build .#nixosConfigurations.chexit.config.system.build.toplevel \
            --no-link \
            --print-build-logs