mcp-smoke-test.yml

name: MCP Smoke Test

# Smoke-tests all 5 MCP tools (lemonade_list_models, lemonade_chat,
# lemonade_transcribe_audio, lemonade_generate_image, lemonade_omni) via two
# independent build paths: a native CMake build and a Docker image build.
# Either job failing fails the workflow.

on:
  pull_request:
    paths:
      - "src/cpp/server/mcp_server.cpp"
      - "src/cpp/include/lemon/mcp_server.h"
      - "src/cpp/server/server.cpp"
      - "src/cpp/server/router.cpp"
      - "src/cpp/server/model_manager.cpp"
      - "src/cpp/resources/server_models.json"
      - "src/cpp/resources/backend_versions.json"
      - "Dockerfile"
      - ".dockerignore"
      - "CMakeLists.txt"
      - "CMakePresets.json"
      - "setup.sh"
      - "test/server_mcp_smoke.py"
      - "test/server_mcp.py"
      - ".github/workflows/mcp-smoke-test.yml"
  push:
    branches: ["main"]
  workflow_dispatch:

permissions:
  contents: read

concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}-${{ github.event_name == 'pull_request' && 'pr' || github.run_id }}
  cancel-in-progress: ${{ github.event_name == 'pull_request' }}

jobs:
  # ========================================================================
  # CMake path: build lemond natively, start it, hit /mcp
  # ========================================================================
  cmake-smoke-test:
    name: CMake build + MCP smoke test
    runs-on: ubuntu-latest
    timeout-minutes: 45

    steps:
      - name: Checkout
        uses: actions/checkout@v5

      - name: Install build dependencies
        run: |
          sudo apt-get update
          sudo apt-get install -y \
            build-essential \
            cmake \
            ninja-build \
            libssl-dev \
            libcurl4-openssl-dev \
            pkg-config \
            libdrm-dev

      - name: Cache FetchContent dependencies
        uses: actions/cache@v5
        with:
          path: build/_deps
          key: mcp-smoke-fetchcontent-${{ hashFiles('CMakeLists.txt') }}
          restore-keys: |
            mcp-smoke-fetchcontent-

      - name: Configure (CMake, web-app disabled)
        run: |
          cmake --preset default -DBUILD_WEB_APP=OFF

      - name: Build lemond
        run: |
          cmake --build --preset default --target lemond

      - name: Verify lemond binary
        run: |
          test -x build/lemond
          ./build/lemond --version

      - name: Set up Python
        uses: actions/setup-python@v6
        with:
          python-version: "3.10"

      - name: Install Python test dependencies
        run: |
          python -m pip install --upgrade pip
          python -m pip install requests

      - name: Start lemond in background
        run: |
          mkdir -p server-logs-cmake
          mkdir -p ci-cache-cmake
          nohup ./build/lemond ci-cache-cmake \
            --host 127.0.0.1 --port 13305 \
            > server-logs-cmake/lemond.stdout.log \
            2> server-logs-cmake/lemond.stderr.log &
          echo "$!" > lemond.pid
          echo "Started lemond PID $(cat lemond.pid)"

      - name: Run MCP smoke tests against CMake build
        run: |
          python test/server_mcp_smoke.py --host 127.0.0.1 --port 13305

      - name: Shut down lemond
        if: always()
        run: |
          curl -s -X POST http://127.0.0.1:13305/internal/shutdown || true
          sleep 2
          if [ -f lemond.pid ]; then
            kill "$(cat lemond.pid)" 2>/dev/null || true
          fi

      - name: Upload server logs
        if: always()
        uses: actions/upload-artifact@v7
        with:
          name: cmake-server-logs
          path: server-logs-cmake/
          retention-days: 7
          if-no-files-found: ignore

  # ========================================================================
  # Docker path: build the image, run the container, hit /mcp
  # ========================================================================
  docker-smoke-test:
    name: Docker build + MCP smoke test
    runs-on: ubuntu-latest
    timeout-minutes: 45

    steps:
      - name: Checkout
        uses: actions/checkout@v5

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v3

      - name: Build Docker image
        uses: docker/build-push-action@v6
        with:
          context: .
          file: Dockerfile
          tags: lemonade-server:mcp-smoke
          push: false
          load: true
          cache-from: type=gha,scope=mcp-smoke
          cache-to: type=gha,mode=max,scope=mcp-smoke

      - name: Run container
        run: |
          docker run -d \
            --name lemonade-mcp-smoke \
            -p 13305:13305 \
            lemonade-server:mcp-smoke

      - name: Set up Python
        uses: actions/setup-python@v6
        with:
          python-version: "3.10"

      - name: Install Python test dependencies
        run: |
          python -m pip install --upgrade pip
          python -m pip install requests

      - name: Run MCP smoke tests against Docker container
        run: |
          python test/server_mcp_smoke.py --host 127.0.0.1 --port 13305

      - name: Capture container logs
        if: always()
        run: |
          mkdir -p server-logs-docker
          docker logs lemonade-mcp-smoke \
            > server-logs-docker/lemond.stdout.log \
            2> server-logs-docker/lemond.stderr.log || true

      - name: Stop container
        if: always()
        run: |
          docker rm -f lemonade-mcp-smoke || true

      - name: Upload container logs
        if: always()
        uses: actions/upload-artifact@v7
        with:
          name: docker-server-logs
          path: server-logs-docker/
          retention-days: 7
          if-no-files-found: ignore