ubuntu.yml

name: Ubuntu CUDA Build

on:
  push:
    branches: [ dev, master ]
    paths-ignore:
      - '**.md'
      - 'docs/**'
  pull_request:
    branches: [ dev, master ]
    paths-ignore:
      - '**.md'
      - 'docs/**'
  workflow_dispatch:

jobs:
  build-ubuntu:
    if: github.repository == 'MrNeRF/LichtFeld-Studio' || github.event.pull_request.base.repo.full_name == 'MrNeRF/LichtFeld-Studio'
    runs-on: ubuntu-24.04
    container:
      image: nvidia/cuda:12.8.0-devel-ubuntu24.04
    strategy:
      fail-fast: false
      matrix:
        build_type: [Release, Debug]
    env:
      VCPKG_ROOT: ${{ github.workspace }}/../vcpkg
      CC: gcc-14
      CXX: g++-14
      VCPKG_BUILD_TYPE: release
      VCPKG_FORCE_SYSTEM_BINARIES: 1
      CMAKE_MAKE_PROGRAM: /usr/bin/ninja

    steps:
      - name: Install Git
        run: |
          apt-get update
          apt-get install -y git

      - name: Checkout source
        uses: actions/checkout@v4
        with:
          submodules: recursive

      - name: Free disk space
        run: |
          apt-get clean
          rm -rf /var/lib/apt/lists/*
          # Host paths (may not exist in container)
          rm -rf /usr/share/dotnet /opt/ghc /opt/hostedtoolcache /usr/local/lib/android /opt/az
          # CUDA extras - samples, docs, tools we don't need
          rm -rf /usr/local/cuda/nsight* /usr/local/cuda/compute-sanitizer
          rm -rf /usr/local/cuda/extras /usr/local/cuda/tools
          rm -rf /usr/local/cuda/doc
          # Remove large static libs but keep ones needed for build
          find /usr/local/cuda/targets/x86_64-linux/lib -name '*.a' \
            ! -name 'libcudart_static.a' \
            ! -name 'libcudadevrt.a' \
            ! -name 'libnvjpeg_static.a' \
            ! -name 'libnvjpeg2k_static.a' \
            ! -name 'libculibos.a' \
            -delete 2>/dev/null || true
          df -h

      - name: Install build dependencies
        run: |
          apt-get update
          apt-get install -y ca-certificates gpg wget

          # CMake 3.30+ from Kitware
          wget -O - https://apt.kitware.com/keys/kitware-archive-latest.asc 2>/dev/null | gpg --dearmor - | tee /usr/share/keyrings/kitware-archive-keyring.gpg >/dev/null
          echo 'deb [signed-by=/usr/share/keyrings/kitware-archive-keyring.gpg] https://apt.kitware.com/ubuntu/ noble main' | tee /etc/apt/sources.list.d/kitware.list >/dev/null
          apt-get update
          apt-get install -y kitware-archive-keyring

          apt-get install -y git curl unzip cmake gcc-14 g++-14 ccache ninja-build \
            zip tar pkg-config python3 python3-dev libxinerama-dev libxcursor-dev xorg-dev libglu1-mesa-dev \
            libwayland-dev libxkbcommon-dev libegl-dev libdecor-0-dev libibus-1.0-dev libdbus-1-dev \
            libsystemd-dev \
            nasm autoconf autoconf-archive automake libtool

          update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-14 100 \
                              --slave /usr/bin/g++ g++ /usr/bin/g++-14

      - name: Cache vcpkg tool
        id: cache-vcpkg-tool
        uses: actions/cache@v4
        with:
          path: ${{ env.VCPKG_ROOT }}
          key: vcpkg-tool-${{ runner.os }}-2026-02-21
          restore-keys: vcpkg-tool-${{ runner.os }}-

      - name: Setup vcpkg
        if: steps.cache-vcpkg-tool.outputs.cache-hit != 'true'
        run: |
          cd ..
          git clone https://github.com/microsoft/vcpkg.git
          ./vcpkg/bootstrap-vcpkg.sh -disableMetrics

      - name: Configure vcpkg triplet
        run: |
          cat >> $VCPKG_ROOT/triplets/x64-linux.cmake << 'EOF'
          set(VCPKG_BUILD_TYPE release)
          set(VCPKG_MAX_CONCURRENCY 2)
          EOF

      - name: Cache ccache
        uses: actions/cache@v4
        with:
          path: /github/home/.cache/ccache
          key: ccache-${{ runner.os }}-${{ matrix.build_type }}-${{ github.run_id }}
          restore-keys: ccache-${{ runner.os }}-${{ matrix.build_type }}-

      - name: Cache vcpkg packages
        uses: actions/cache@v4
        with:
          path: /github/home/.cache/vcpkg/archives
          key: vcpkg-pkgs-${{ runner.os }}-${{ hashFiles('**/vcpkg.json') }}
          restore-keys: vcpkg-pkgs-${{ runner.os }}-

      - name: Configure
        run: |
          cmake -B build -S . -G Ninja \
            -DCMAKE_BUILD_TYPE=${{ matrix.build_type }} \
            -DCMAKE_CUDA_COMPILER=/usr/local/cuda/bin/nvcc \
            -DBUILD_PYTHON_STUBS=OFF \
            -DCUDA_DEVICE_DEBUG=OFF

      - name: Clean vcpkg buildtrees
        run: |
          rm -rf build/vcpkg_installed/vcpkg/blds
          df -h

      - name: Build
        run: cmake --build build -j $(nproc)