name: Nix actions

on:
  pull_request:
  push:
    branches:
      - main
      - staging
      - release-*

jobs:
  nix-matrix:
    runs-on: ubuntu-latest
    outputs:
      matrix: ${{ steps.set-matrix.outputs.matrix }}
    steps:
      - uses: actions/checkout@v4
      - uses: cachix/install-nix-action@v25
      - id: set-matrix
        name: Generate Nix Matrix
        run: |
          set -Eeu
          echo "matrix=$(nix eval --json '.#githubActions.matrix')" >> "$GITHUB_OUTPUT"

  nix-build:
    needs: nix-matrix
    runs-on: ${{ matrix.os }}
    strategy:
      matrix: ${{fromJSON(needs.nix-matrix.outputs.matrix)}}
    steps:
      - uses: actions/checkout@v4
      - uses: cachix/install-nix-action@v25
      - run: nix build -L ".#${{ matrix.attr }}"
  tests:
    strategy:
      matrix:
        os: [ ubuntu-latest, macos-latest ]
    runs-on: ${{ matrix.os }}
    steps:
    - uses: actions/checkout@v4
      with:
          # Nix Flakes doesn't work on shallow clones
          fetch-depth: 0
    - uses: cachix/install-nix-action@v25
      with:
        github_access_token: ${{ secrets.GITHUB_TOKEN }}
        extra_nix_config: |
          accept-flake-config = true
    - name: Build
      run: nix develop -c bash -c 'meson setup -Db_sanitize=address,undefined build && ninja -C build'
    - name: Run tests
      run: nix develop -c pytest ./tests -m 'not infiniterecursion'

    # address sanitizer will lead to out-of-memory in the infinite recursion case
    - name: Build without sanitizer
      run: nix develop -c bash -c 'rm -rf build && meson setup build && ninja -C build'
    - name: Run tests
      run: nix develop -c pytest ./tests -m 'infiniterecursion'

  collect:
    runs-on: ubuntu-latest
    needs:
      - nix-build
      - tests
    steps:
      - run: "true"