check.yml

name: Nix Flake Check

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

jobs:
  check:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout repository
        uses: actions/checkout@v4

      - name: Install Nix
        uses: DeterminateSystems/nix-installer-action@main

      - name: Setup Nix cache
        uses: DeterminateSystems/magic-nix-cache-action@main

      - name: Check formatting (nix fmt)
        run: |
          echo "Verifying all files are formatted with 'nix fmt'..."
          echo "If this fails, run 'nix fmt' locally and commit the changes."
          nix build .#checks.x86_64-linux.treefmt

      - name: Run nix flake check
        run: nix flake check --all-systems

      - name: Show flake outputs
        run: nix flake show