name: "CI"
on:
  # Run only when pushing to master branch, and making PRs
  push:
    branches:
      - master
  pull_request:
jobs:
  build:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v2
      - uses: cachix/install-nix-action@v13
        with:
          install_url: https://nixos-nix-install-tests.cachix.org/serve/i6laym9jw3wg9mw6ncyrk6gjx4l34vvx/install
          install_options: "--tarball-url-prefix https://nixos-nix-install-tests.cachix.org/serve"
          extra_nix_config: |
            experimental-features = nix-command flakes
      - name: Cache Nix dependencies
        run: |
          nix develop -j 4 -c echo
      - name: Format check
        run: |
          nix develop -j auto -c treefmt --fail-on-change
      - name: Build
        id: build
        run: |
          nix build -j auto