name: Build

# Every job builds the real plugin: the core library linked against the
# pinned livekit/client-sdk-cpp release, and -- where libobs is available --
# the OBS adapter module itself.
#
# Linux gets libobs from Ubuntu's libobs-dev. macOS and Windows have no
# equivalent system package, so they run obs-plugintemplate's buildspec
# bootstrap (buildspec.json + cmake/common/buildspec_common.cmake), which
# downloads the pinned obs-deps bundle and obs-studio source and builds just
# `libobs`. That step is the slow one: several minutes on a cold runner.
#
# RELEASE GATE: this workflow only builds, tests, and uploads CI-internal
# workflow artifacts (actions/upload-artifact, below) -- it does not create a
# Gitea Release, push a tag-triggered publish, or otherwise distribute
# binaries publicly, and it must not start doing so without explicit owner
# sign-off on the WebRTC/OpenH264 attribution question tracked in
# third_party/livekit/README.md and the README's top-level Status section.
# (The separate GPLv2/Apache-2.0 license-compatibility question is resolved:
# this project's own code is Apache-2.0.) If a real release/publish step is
# ever added here, it must carry that same gate.

on:
  push:
  pull_request:

jobs:
  linux:
    name: Linux (ubuntu-24.04)
    # Pinned to 24.04 rather than ubuntu-latest, which this instance's two
    # Linux runners answer with different releases. 24.04's libobs-dev is
    # 30.0.2, exactly the OBS version buildspec.json pins for macOS/Windows,
    # so all three platforms build against the same libobs. On a 22.04 runner
    # libobs-dev is OBS 27, which is a different API surface entirely.
    runs-on: ubuntu-24.04
    steps:
      - name: Checkout
        uses: actions/checkout@v4

      - name: Install build dependencies
        run: |
          sudo apt-get update -qq
          sudo apt-get install -y -qq cmake ninja-build libobs-dev libcurl4-openssl-dev

      - name: Configure
        # Linux keeps its distribution libobs; the buildspec bootstrap is for
        # the two platforms that have no such package.
        run: cmake -S . -B build -G Ninja -DCMAKE_BUILD_TYPE=Release -DSTPLUGIN_BOOTSTRAP_OBS=OFF

      - name: Build
        run: cmake --build build

      - name: Test (core library)
        run: ctest --test-dir build --output-on-failure

      - name: Show what was built
        run: |
          ls -la build/package/bin/64bit build/package/data/locale build/package/licenses
          ldd build/package/bin/64bit/streamer-tools-camera.so | grep -E 'obs|livekit'
          nm -D build/package/bin/64bit/streamer-tools-camera.so | grep -E ' T obs_module_(load|unload)'

      - name: Upload plugin
        continue-on-error: true
        uses: actions/upload-artifact@v3
        with:
          name: streamer-tools-camera-linux-x64
          path: build/package

  macos:
    name: macOS (macos-latest)
    runs-on: macos-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v4

      - name: Install build dependencies
        run: brew install cmake ninja

      - name: Configure
        # The buildspec bootstrap runs here: it fetches obs-deps + the pinned
        # obs-studio source and builds libobs before this project configures.
        #
        # If that fails, fall back to a core-library-only build rather than
        # going red: the core library and its tests are what this job mainly
        # guards, and the fallback is loud (a workflow warning, plus the
        # "Show what was built" step below reporting no module) rather than
        # silent. Do not remove the warning -- a green job that quietly stopped
        # building the plugin is worse than a red one.
        run: |
          if ! cmake -S . -B build -G Ninja -DCMAKE_BUILD_TYPE=Release; then
            echo "::warning::OBS SDK bootstrap failed on macOS; building the core library only. The plugin module was NOT built."
            rm -rf build
            cmake -S . -B build -G Ninja -DCMAKE_BUILD_TYPE=Release -DSTPLUGIN_BOOTSTRAP_OBS=OFF
          fi

      - name: Build
        run: cmake --build build

      - name: Test (core library)
        run: ctest --test-dir build --output-on-failure

      - name: Show what was built
        run: |
          ls -la .deps/Frameworks/libobs.framework/Resources/cmake || true
          ls -la build/package/bin || true
          otool -L build/package/bin/streamer-tools-camera.so || true

      - name: Upload plugin
        continue-on-error: true
        uses: actions/upload-artifact@v3
        with:
          name: streamer-tools-camera-macos
          path: build/package

  windows:
    name: Windows (windows-latest)
    runs-on: windows-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v4

      - name: Install build dependencies
        # winvm-builder is a self-hosted act_runner labeled "windows-latest";
        # it is NOT the GitHub-hosted image, so none of that image's
        # preinstalled tooling (cmake included) can be assumed present.
        uses: lukka/get-cmake@latest

      - name: Configure
        # The default Visual Studio generator is required, not Ninja:
        # cmake/windows/buildspec.cmake keys the dependency slice off
        # CMAKE_VS_PLATFORM_NAME, which only a VS generator sets.
        #
        # Same fallback as macOS, and the same warning: a green job that
        # quietly stopped building the plugin is worse than a red one.
        # PowerShell, not bash: this runner is a plain Windows VM and bash
        # cannot be assumed present.
        run: |
          cmake -S . -B build -A x64
          if ($LASTEXITCODE -ne 0) {
            Write-Host "::warning::OBS SDK bootstrap failed on Windows; building the core library only. The plugin module was NOT built."
            Remove-Item -Recurse -Force build -ErrorAction SilentlyContinue
            cmake -S . -B build -A x64 -DSTPLUGIN_BOOTSTRAP_OBS=OFF
            if ($LASTEXITCODE -ne 0) { exit 1 }
          }

      - name: Build
        run: cmake --build build --config Release

      - name: Test (core library)
        run: ctest --test-dir build -C Release --output-on-failure

      - name: Show what was built
        run: |
          if (Test-Path build\package\bin\64bit) {
            Get-ChildItem build\package\bin\64bit
          } else {
            Write-Host "no plugin module was built (core library only)"
          }

      - name: Upload plugin
        continue-on-error: true
        uses: actions/upload-artifact@v3
        with:
          name: streamer-tools-camera-windows-x64
          path: build/package