name: CI

on:
  push:
    branches:
      - main
  pull_request:
    branches:
      - main

concurrency:
  group: ci-${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true

permissions:
  contents: read

jobs:
  build-test:
    name: Build & test (${{ matrix.os }})
    runs-on: ${{ matrix.os }}
    strategy:
      fail-fast: false
      matrix:
        os:
          - warp-ubuntu-latest-x64-8x
          - warp-macos-15-arm64-6x
          - warp-windows-latest-x64-16x

    steps:
      - name: Checkout
        uses: actions/checkout@v4
        with:
          # gpui/ is a git submodule; its crates are workspace members of
          # their own repo and build as path dependencies of oakapp.
          submodules: true

      - name: Install Rust (stable)
        uses: dtolnay/rust-toolchain@stable

      # ------------------------------------------------------------------
      # System dependencies
      # ------------------------------------------------------------------
      - name: Install system dependencies (Linux)
        if: runner.os == 'Linux'
        run: |
          # Codec/filter libraries for the ffmpeg-sys-next build feature
          # (see tooling/install-deps.sh).
          tooling/install-deps.sh
          # Real OpenColorIO (ocio-sys real bridge) plus the headless test
          # infra gpui needs: X11, software Mesa Vulkan (lavapipe) and xvfb.
          sudo apt-get install -y \
            libopencolorio-dev \
            libgl1-mesa-dev libgl1-mesa-dri mesa-vulkan-drivers \
            libvulkan-dev libxkbcommon-dev xvfb

      - name: Install system dependencies (macOS)
        if: runner.os == 'macOS'
        run: |
          tooling/install-deps.sh
          brew install opencolorio

      - name: Setup MSYS2 (Windows)
        if: runner.os == 'Windows'
        uses: msys2/setup-msys2@v2
        with:
          msystem: UCRT64
          update: true
          install: >-
            git
            mingw-w64-ucrt-x86_64-gcc

      - name: Install system dependencies (Windows)
        if: runner.os == 'Windows'
        shell: msys2 {0}
        run: |
          bash tooling/install-deps.sh
          pacman -S --needed --noconfirm mingw-w64-ucrt-x86_64-opencolorio

      # ------------------------------------------------------------------
      # Build environment
      # ------------------------------------------------------------------
      # ocio-sys builds a stub bridge unless these are set; the oakcommon
      # ocioutils tests need the real library (see crates/oakcommon/.cargo/
      # config.toml, which only applies to builds run from that directory).
      - name: Configure build environment (Linux)
        if: runner.os == 'Linux'
        run: |
          echo "OCIO_RS_ENABLE_REAL=1" >> "$GITHUB_ENV"
          echo "OCIO_INSTALL_DIR=/usr" >> "$GITHUB_ENV"
          echo "OCIO_RS_LINK=dynamic" >> "$GITHUB_ENV"

      - name: Configure build environment (macOS)
        if: runner.os == 'macOS'
        run: |
          echo "OCIO_RS_ENABLE_REAL=1" >> "$GITHUB_ENV"
          echo "OCIO_INSTALL_DIR=/opt/homebrew/opt/opencolorio" >> "$GITHUB_ENV"
          echo "OCIO_RS_LINK=dynamic" >> "$GITHUB_ENV"
          # Homebrew quirks: lame.pc / snappy / libopenjp2.pc live off the
          # default pkg-config search paths (see docs/build.md).
          echo "CFLAGS=-I/opt/homebrew/include" >> "$GITHUB_ENV"
          echo "LDFLAGS=-L/opt/homebrew/lib" >> "$GITHUB_ENV"
          echo "PKG_CONFIG_PATH=/opt/homebrew/lib/pkgconfig/openjpeg" >> "$GITHUB_ENV"

      - name: Configure build environment (Windows)
        if: runner.os == 'Windows'
        shell: msys2 {0}
        run: |
          echo "OCIO_RS_ENABLE_REAL=1" >> "$GITHUB_ENV"
          echo "OCIO_INSTALL_DIR=/ucrt64" >> "$GITHUB_ENV"
          echo "OCIO_RS_LINK=dynamic" >> "$GITHUB_ENV"

      # ------------------------------------------------------------------
      # Caches
      # ------------------------------------------------------------------
      # Covers the whole target/ dir plus ~/.cargo; shared across branches
      # of the same OS.
      - name: Cache cargo artifacts
        uses: Swatinem/rust-cache@v2
        with:
          shared-key: oak-workspace

      # The project FFmpeg (release/8.0, static, all free codecs + hwaccel)
      # is built by tooling/ffmpeg/build-ffmpeg.sh — 10-20 min on a cold
      # cache. It does not depend on the Rust toolchain, so key it on the
      # script itself and keep it out of rust-cache.
      - name: Cache project FFmpeg
        uses: actions/cache@v4
        with:
          path: .cache/ffmpeg
          key: ffmpeg-${{ runner.os }}-${{ hashFiles('tooling/ffmpeg/build-ffmpeg.sh') }}

      # ------------------------------------------------------------------
      # Project FFmpeg (script + FFMPEG_DIR; see docs/build.md)
      # ------------------------------------------------------------------
      - name: Build project FFmpeg (Linux/macOS)
        if: runner.os != 'Windows'
        run: |
          tooling/ffmpeg/build-ffmpeg.sh
          echo "FFMPEG_DIR=$PWD/.cache/ffmpeg" >> "$GITHUB_ENV"

      - name: Build project FFmpeg (Windows)
        if: runner.os == 'Windows'
        shell: msys2 {0}
        run: |
          bash tooling/ffmpeg/build-ffmpeg.sh
          echo "FFMPEG_DIR=$(cygpath -m "$PWD/.cache/ffmpeg")" >> "$GITHUB_ENV"

      # ------------------------------------------------------------------
      # Build & test
      # ------------------------------------------------------------------
      - name: Build (Linux)
        if: runner.os == 'Linux'
        run: cargo build --workspace --locked

      - name: Build (macOS)
        if: runner.os == 'macOS'
        run: cargo build --workspace --locked

      - name: Build (Windows)
        if: runner.os == 'Windows'
        shell: msys2 {0}
        run: cargo build --workspace --locked

      # xvfb + 24-bit screen: the gpui #[gpui::test] tests open real windows
      # and render through wgpu on Mesa's software Vulkan (lavapipe).
      - name: Test (Linux)
        if: runner.os == 'Linux'
        run: xvfb-run -a -s "-screen 0 1920x1080x24" cargo test --workspace --locked

      - name: Test (macOS)
        if: runner.os == 'macOS'
        run: cargo test --workspace --locked

      - name: Test (Windows)
        if: runner.os == 'Windows'
        shell: msys2 {0}
        run: cargo test --workspace --locked