name: "CI"

on:
  push:
    branches: [ "main" ]
    paths:
      - "**.nix"
      - "**.rs"
      - "**.lock"
      - "Cargo.toml"
  pull_request:
    paths:
      - "**.nix"
      - "**.rs"
      - "**.lock"
      - "Cargo.toml"
  workflow_dispatch:

jobs:
  build:
    name: "Build (${{ matrix.os }})"

    strategy:
      fail-fast: false
      matrix:
        include:
          - os: "ubuntu-latest"
            use-nix: true
          - os: "windows-latest"
            use-nix: false

    runs-on: ${{ matrix.os }}

    steps:
      - name: "Checkout repository"
        uses: "actions/checkout@v4"

      - name: "Install Nix"
        if: ${{ matrix.use-nix }}
        uses: "cachix/install-nix-action@v30"

      - name: "Setup Nix cache"
        if: ${{ matrix.use-nix }}
        uses: "DeterminateSystems/magic-nix-cache-action@v8"

      - name: "Install Rust"
        if: ${{ !matrix.use-nix }}
        uses: "actions-rust-lang/setup-rust-toolchain@v1"

      - name: "Run cargo build"
        if: ${{ !matrix.use-nix }}
        run: |
          cargo build --locked --release

      - name: "Evaluate flake.nix"
        if: ${{ matrix.use-nix }}
        run: nix flake check --no-build --show-trace

      - name: "Run nix build"
        if: ${{ matrix.use-nix }}
        run: |
          nix build --print-build-logs

      - name: "Build Flake checks"
        if: ${{ matrix.os == 'ubuntu-latest' }}
        run: |
          nix flake check --print-build-logs

  release-gate:
    name: "CI Release gate"
    needs: [ "build" ]

    if: ${{ always() }}

    runs-on: "ubuntu-latest"

    steps:
      - name: "Exit with error"
        if: ${{ contains(needs.*.result, 'failure') || contains(needs.*.result, 'cancelled') }}
        run: |
          exit 1