nix.yaml

name: nix
on:
  push:
    branches:
      - main
  pull_request:
jobs:
  build:
    runs-on: ubuntu-latest
    steps:
    - uses: actions/checkout@v4
    - name: Install Nix
      uses: cachix/install-nix-action@v22
      with:
        nix_path: nixpkgs=channel:nixos-unstable
        extra_nix_config: |
          access-tokens = github.com=${{ secrets.GITHUB_TOKEN }}
    - name: Install Cache
      uses: DeterminateSystems/magic-nix-cache-action@v4
    - run: nix flake check
    # confirms that the shell works, and that there are no linting errors
    - name: lint formatting
      run: |
        nix develop --command bash -c "find . -name '*.nix' | xargs nixpkgs-fmt"
        if ! git diff-index --quiet HEAD --; then
          echo "nixpkgs-fmt had changes"
          exit 1
        fi
    # confirms that the build works
    - run: nix build .