name: Nix Flake Check

on: [push, pull_request, workflow_dispatch]

jobs:
  checks:
    name: Check expressions
    runs-on: ubuntu-latest

    steps:
      - name: Checkout repository
        uses: actions/checkout@v4
      - name: Install nix
        uses: cachix/install-nix-action@v24
        with:
          install_url: https://nixos.org/nix/install
          extra_nix_config: |
            access-tokens = github.com=${{ secrets.GITHUB_TOKEN }}
            experimental-features = nix-command flakes

      - name: Run Nix Flake Check
        run: |
          output=$(nix flake check 2>&1)
          echo "$output"
          if echo "$output" | grep -q -i error; then
            exit 1
          fi