name: Nix

on:
  pull_request:
    types: [opened, synchronize, reopened]
    paths-ignore:
      - "website/**"
      - "docs/**"
      - "**/*.md"
  push:
    branches: [master]
    paths-ignore:
      - "website/**"
      - "docs/**"
      - "**/*.md"

permissions:
  contents: read

concurrency:
  group: nix-${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
  cancel-in-progress: true

jobs:
  flake-check:
    name: flake check
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v6
        with:
          persist-credentials: false

      - name: Install Nix
        uses: cachix/install-nix-action@8aa03977d8d733052d78f4e008a241fd1dbf36b3 # v31.10.6
        with:
          extra_nix_config: |
            experimental-features = nix-command flakes
            always-allow-substitutes = true

      - name: Enable Magic Nix Cache
        if: github.event_name == 'push' || github.event.pull_request.head.repo.full_name == github.repository
        uses: DeterminateSystems/magic-nix-cache-action@565684385bcd71bad329742eefe8d12f2e765b39 # v13
        continue-on-error: true
        with:
          source-tag: v0.1.6
          use-flakehub: disabled
          diagnostic-endpoint: ""

      - name: Run Nix flake check
        run: |
          nix flake check --print-build-logs
          nix flake check --all-systems --no-build --print-build-logs