docker-build.yml

# ============================================================================
# docker-build.yml
# ============================================================================
# Copyright (c) 2025 Michael Gardner, A Bit of Help, Inc.
# SPDX-License-Identifier: BSD-3-Clause
# See LICENSE file in the project root.
# ============================================================================

name: Docker Build

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

jobs:
  docker-build:
    runs-on: ubuntu-latest
    strategy:
      fail-fast: false
      matrix:
        include:
          - name: "upstream"
            dockerfile: "Dockerfile"
            image_name: "dev-container-cpp"
            platforms: "linux/amd64,linux/arm64"
          - name: "system"
            dockerfile: "Dockerfile.system"
            image_name: "dev-container-cpp-system"
            platforms: "linux/amd64,linux/arm64"

    steps:
      - name: Check out repository
        uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4.3.1

      - name: Set up QEMU
        uses: docker/setup-qemu-action@49b3bc8e6bdd4a60e6116a5414239cba5943d3cf # v3.2.0

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@8d2750c68a42422c14e847fe6c8ac0403b4cbd6f # v3.12.0

      - name: Build image (${{ matrix.name }}, ${{ matrix.platforms }})
        run: |
          docker buildx build \
            --platform ${{ matrix.platforms }} \
            -f ${{ matrix.dockerfile }} \
            -t ${{ matrix.image_name }}:ci .

      - name: Load amd64 image for smoke test
        run: |
          docker buildx build \
            --platform linux/amd64 \
            --load \
            -f ${{ matrix.dockerfile }} \
            -t ${{ matrix.image_name }}:ci .

      - name: Smoke test
        run: |
          docker run --rm \
            -e HOST_UID=$(id -u) \
            -e HOST_GID=$(id -g) \
            -e HOST_USER=$(whoami) \
            -v "${{ github.workspace }}":/workspace \
            -w /workspace/examples/hello_cpp \
            ${{ matrix.image_name }}:ci \
            bash -c '
              set -e
              echo "=== Environment ==="
              echo "USER=$(whoami) UID=$(id -u) GID=$(id -g) HOME=$HOME"
              echo "DISPLAY_USER=$DISPLAY_USER"
              echo "CONTAINER_RUNTIME=$CONTAINER_RUNTIME"
              echo ""
              echo "=== Compile test (CMake + Ninja) ==="
              cmake -B build -G Ninja -DCMAKE_CXX_STANDARD=20
              cmake --build build
              echo ""
              echo "=== Run test ==="
              ./build/hello_cpp
              echo ""
              echo "=== Toolchain versions ==="
              gcc --version | head -1
              g++ --version | head -1
              clang --version | head -1
              cmake --version | head -1
              ninja --version
              arm-none-eabi-gcc --version | head -1
              echo "=== Smoke test passed ==="
            '