name: wgpu sanity (macOS)

# Lightweight compile-only check for the wgpu backend on macOS. Skips the
# IfcViewerWgpuMinimal executable (its surface creation has no Metal path
# yet — see task #32) and just confirms IfcViewerWgpu links and the pure-
# CPU state tests pass.
#
# Goal: catch portability regressions in the wgpu source on Apple Silicon
# / Intel Mac without needing the full IfcGeom + OCCT + Python toolchain
# that build_osx.yml carries. Runs in ~5 minutes.

on:
  push:
    branches:
      - ifcviewer-wgpu
      - main
      - v0.8.0
    paths:
      - 'src/ifcviewer-wgpu/**'
      - 'src/ifcviewer-wgpu-minimal/**'
      - 'src/wgpu-mem-probe/**'
      - 'src/ifcviewer/SidecarCache.*'
      - 'src/ifcviewer/InstancedGeometry.h'
      - 'src/ifcviewer/VertexQuantization.h'
      - 'cmake/CMakeLists.txt'
      - '.github/workflows/ci-wgpu-mac.yml'
  pull_request:
    paths:
      - 'src/ifcviewer-wgpu/**'
      - 'src/ifcviewer-wgpu-minimal/**'
      - 'src/wgpu-mem-probe/**'
      - 'src/ifcviewer/SidecarCache.*'
      - 'src/ifcviewer/InstancedGeometry.h'
      - 'src/ifcviewer/VertexQuantization.h'
      - 'cmake/CMakeLists.txt'
      - '.github/workflows/ci-wgpu-mac.yml'
  workflow_dispatch:

jobs:
  build_wgpu_mac:
    runs-on: ${{ matrix.runner }}
    strategy:
      fail-fast: false
      matrix:
        include:
          - arch: arm64
            runner: macos-14

    steps:
      - name: Checkout
        uses: actions/checkout@v4
        with:
          submodules: false

      - name: Install dependencies via Homebrew
        run: |
          brew update
          # qt installs Qt6; eigen is header-only. Boost is required by
          # the top-level CMakeLists unconditionally (line 328) even when
          # IfcGeom/IfcPython are off — until ifcviewer-core is extracted
          # (task #12) we have to humour it.
          brew install qt eigen boost
          # patchelf isn't on mac — wgpu-native's SONAME workaround is
          # Linux-only and CMake guards on UNIX AND NOT APPLE so this is fine.

      - name: ccache
        uses: hendrikmuhs/ccache-action@v1.2.22
        with:
          key: mac-wgpu-${{ matrix.arch }}

      - name: Configure (standalone wgpu, tests on)
        shell: bash
        # The top-level CMakeLists.txt unconditionally find_package's
        # CGAL/OpenCASCADE/etc. before our BUILD_BONSAIVIEWER gate kicks
        # in, so we explicitly disable every IfcGeom/IfcParse/IfcPython
        # subproject — we only want IfcViewerWgpu + its state tests.
        run: |
          QT_PREFIX="$(brew --prefix qt)"
          cmake -B build \
            -S cmake \
            -G Ninja \
            -DCMAKE_BUILD_TYPE=Release \
            -DBUILD_BONSAIVIEWER=OFF \
            -DBUILD_BONSAIVIEWER_WGPU=ON \
            -DBUILD_BONSAIVIEWER_TESTS=ON \
            -DBUILD_IFCGEOM=OFF \
            -DBUILD_IFCPYTHON=OFF \
            -DBUILD_CONVERT=OFF \
            -DBUILD_EXAMPLES=OFF \
            -DBUILD_GEOMSERVER=OFF \
            -DWITH_OPENCASCADE=OFF \
            -DWITH_CGAL=OFF \
            -DCOLLADA_SUPPORT=OFF \
            -DCMAKE_PREFIX_PATH="${QT_PREFIX}" \
            -DQT_DIR="${QT_PREFIX}" \
            -DCMAKE_C_COMPILER_LAUNCHER=ccache \
            -DCMAKE_CXX_COMPILER_LAUNCHER=ccache

      - name: Build IfcViewerWgpu + state tests
        # Skip IfcViewerWgpuMinimal: its createSurface has no Metal path
        # yet (task #32). Static lib compiles cleanly because the X11 /
        # Wayland surface blocks are wrapped in #if defined(Q_OS_LINUX).
        # No `-- -j N`: Ninja parallelises by default (it rejects bare
        # `-j` unlike make).
        run: |
          cmake --build build \
            --target IfcViewerWgpu test_wgpu_selection test_wgpu_visibility

      - name: Run state tests
        working-directory: build
        # No -R filter: only wgpu state tests are built in this config,
        # so ctest discovers exactly those.
        run: ctest --output-on-failure

      - name: Upload CMake configure log on failure
        if: failure()
        uses: actions/upload-artifact@v4
        with:
          name: cmake-log-${{ matrix.arch }}
          path: |
            build/CMakeCache.txt
            build/CMakeFiles/CMakeConfigureLog.yaml
          retention-days: 14