name: Build (NixOS)

on:
  push:
    branches: [main, master]
    paths:
      - '**.c'
      - '**.h'
      - '**.cpp'
      - '**.scm'
      - 'meson.build'
      - 'meson_options.txt'
      - 'flake.nix'
      - 'nix/**'
      - 'protocols/**'
      - '.github/workflows/build-nixos.yml'
  pull_request:
    branches: [main, master]
    paths:
      - '**.c'
      - '**.h'
      - '**.cpp'
      - '**.scm'
      - 'meson.build'
      - 'meson_options.txt'
      - 'flake.nix'
      - 'nix/**'
      - 'protocols/**'
      - '.github/workflows/build-nixos.yml'
  workflow_dispatch:

jobs:
  build:
    runs-on: ubuntu-latest
    permissions:
      contents: read

    steps:
      - name: Checkout code
        uses: actions/checkout@v4

      - name: Install Nix
        uses: cachix/install-nix-action@v27
        with:
          nix_path: nixpkgs=channel:nixos-unstable
          extra_nix_config: |
            experimental-features = nix-command flakes

      - name: Build project with Nix
        run: |
          nix build --print-build-logs

      - name: Check build outputs
        run: |
          echo "✅ Build completed successfully!"
          echo "Built executables:"
          ls -lh result/bin/

      - name: Verify executables
        run: |
          # Check that mango executable exists and is executable
          if [ -x "result/bin/mango" ]; then
            echo "✅ mango executable found and is executable"
            result/bin/mango --version || echo "Note: --version may not be supported"
          else
            echo "❌ mango executable not found or not executable"
            exit 1
          fi
          
          # Check that mmsg executable exists and is executable
          if [ -x "result/bin/mmsg" ]; then
            echo "✅ mmsg executable found and is executable"
            result/bin/mmsg --help || echo "Note: --help may not be supported"
          else
            echo "❌ mmsg executable not found or not executable"
            exit 1
          fi