go-test.yml

name: Go tests

on:
  push:
    branches: ["main"]
  pull_request:
    branches: ["main"]
  workflow_dispatch:

jobs:
  build:
    name: Build and test on ${{ matrix.os }} ${{ matrix.arch }}
    runs-on: ${{ matrix.runner }}
    strategy:
      matrix:
        include:
          - os: linux
            arch: amd64
            runner: ubuntu-24.04
          - os: linux
            arch: arm64
            runner: ubuntu-24.04-arm
          - os: darwin
            arch: amd64
            runner: macos-15-intel
          - os: darwin
            arch: arm64
            runner: macos-15
      fail-fast: false

    steps:
      - uses: actions/checkout@v6

      - uses: actions/setup-go@v6
        with:
          go-version-file: go.mod
          cache: true

      - name: Install libclang for generator
        run: |
          if [ "${{ matrix.os }}" = "linux" ]; then
            sudo apt-get update
            # Use libclang-18 which works with Newbluecake/bootstrap v0.17.1 (supports clang 17+)
            sudo apt-get install -y libclang-18-dev llvm-18-dev
            echo "CGO_LDFLAGS=-L/usr/lib/llvm-18/lib" >> $GITHUB_ENV
            echo "CGO_CFLAGS=-I/usr/lib/llvm-18/include" >> $GITHUB_ENV
            echo "LD_LIBRARY_PATH=/usr/lib/llvm-18/lib:$LD_LIBRARY_PATH" >> $GITHUB_ENV
          elif [ "${{ matrix.os }}" = "darwin" ]; then
            # On macOS, use LLVM 18 to match Linux environment
            brew install llvm@18 || brew install llvm
            if [ -d "$(brew --prefix llvm@18)" ]; then
              LLVM_PREFIX=$(brew --prefix llvm@18)
            else
              LLVM_PREFIX=$(brew --prefix llvm)
              echo "::warning::Using latest LLVM on macOS instead of version 18"
            fi
            echo "CGO_LDFLAGS=-L${LLVM_PREFIX}/lib" >> $GITHUB_ENV
            echo "CGO_CFLAGS=-I${LLVM_PREFIX}/include" >> $GITHUB_ENV
            echo "PATH=${LLVM_PREFIX}/bin:$PATH" >> $GITHUB_ENV
            echo "DYLD_LIBRARY_PATH=${LLVM_PREFIX}/lib:$DYLD_LIBRARY_PATH" >> $GITHUB_ENV
          fi

      - name: Download FFmpeg libraries
        run: go run ./cmd/download-lib/

      - name: Build
        run: go build -v .

      # Note: macOS may show linker warnings about version mismatches if the static
      # libraries were built on a newer macOS version than the runner.
      # These warnings are harmless - the libraries have MACOSX_DEPLOYMENT_TARGET=13.0
      - name: Test
        run: go test -v .

      # The generator creates Go bindings from FFmpeg headers using libclang.
      # It's only needed during development when FFmpeg is updated.
      # Using Newbluecake/bootstrap v0.17.1 which supports LLVM/Clang 17+
      - name: Run generator (optional - for development only)
        run: |
          echo "::notice::Generator uses Newbluecake/bootstrap v0.17.1 which supports LLVM 17+"
          echo "::notice::Using LLVM 18 in CI, compatible with the fork's clang 17 support"
          echo "Running generator with environment:"
          echo "CGO_LDFLAGS=$CGO_LDFLAGS"
          echo "CGO_CFLAGS=$CGO_CFLAGS"
          go run ./internal/generator 2>&1 | grep -v "cgo-gcc-prolog\|deprecated" || true
        continue-on-error: true

      - name: Check for generated code differences
        run: |
          if ! git diff --quiet *.gen.go; then
            echo "::notice title=Generated Code Diff on ${{ matrix.os }}/${{ matrix.arch }}::Generated bindings differ from committed version. This may be platform-specific behavior."
            git diff *.gen.go > /tmp/generator-diff.txt
            echo "::group::Generator Diff"
            cat /tmp/generator-diff.txt
            echo "::endgroup::"
          else
            echo "::notice title=Generated Code Match on ${{ matrix.os }}/${{ matrix.arch }}::Generated bindings match committed version."
          fi
        continue-on-error: true