graalpy-demo.yml

name: GraalPy Demo Suite

on:
  push:
    paths:
      - 'demos/graalpy/**'
      - '.github/workflows/graalpy-demo.yml'
  pull_request:
    paths:
      - 'demos/graalpy/**'
      - '.github/workflows/graalpy-demo.yml'

permissions:
  contents: read

concurrency:
  group: graalpy-demo-${{ github.ref }}
  cancel-in-progress: true

jobs:
  graalpy-smoke-test:
    name: GraalPy Smoke Test (basic embedding)
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4

      - name: Set up GraalVM
        uses: graalvm/setup-graalvm@v1
        with:
          distribution: graalvm-community
          java-version: "25"
          github-token: ${{ secrets.GITHUB_TOKEN }}

      - name: Set up Gradle
        uses: gradle/actions/setup-gradle@v4

      - name: Run GraalPy smoke test
        run: ./gradlew :demos:graalpy:runtimeCheck --no-daemon

  graalpy-cpython-llama:
    name: CPython LLM Inference
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4

      - name: Set up Python
        uses: actions/setup-python@v5
        with:
          python-version: '3.12'

      - name: Download model
        run: |
          mkdir -p ~/.llama/models
          # Use a tiny model for CI (faster)
          curl -L -o ~/.llama/models/Llama-3.2-1B-Instruct-f16.gguf \
            "https://huggingface.co/bartowski/Llama-3.2-1B-Instruct-GGUF/resolve/main/Llama-3.2-1B-Instruct-f16.gguf"

      - name: Install llama-cpp-python
        run: |
          cd demos/graalpy
          python3 -m venv .venv
          source .venv/bin/activate
          pip install llama-cpp-python

      - name: Run CPython LLM inference
        run: |
          cd demos/graalpy
          source .venv/bin/activate
          python3 llama_inference.py --prompt "Hello" --max-tokens 16

  graalpy-llama-failure:
    name: GraalPy LLM (expected failure)
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4

      - name: Set up GraalVM
        uses: graalvm/setup-graalvm@v1
        with:
          distribution: graalvm-community
          java-version: "25"
          github-token: ${{ secrets.GITHUB_TOKEN }}

      - name: Set up Gradle
        uses: gradle/actions/setup-gradle@v4

      - name: Set up Python for venv
        uses: actions/setup-python@v5
        with:
          python-version: '3.12'

      - name: Download model
        run: |
          mkdir -p ~/.llama/models
          curl -L -o ~/.llama/models/Llama-3.2-1B-Instruct-f16.gguf \
            "https://huggingface.co/bartowski/Llama-3.2-1B-Instruct-GGUF/resolve/main/Llama-3.2-1B-Instruct-f16.gguf"

      - name: Setup CPython venv for GraalPy demo
        run: |
          cd demos/graalpy
          python3 -m venv .venv
          source .venv/bin/activate
          pip install llama-cpp-python

      - name: Run GraalPy LLM demo (expected to fail)
        continue-on-error: true
        id: graalpy_llama
        run: ./gradlew :demos:graalpy:llama --no-daemon

      - name: Verify expected failure
        run: |
          if [ "${{ steps.graalpy_llama.outcome }}" == "failure" ]; then
            echo "✅ GraalPy LLM failed as expected (ctypes struct limitation)"
            exit 0
          else
            echo "❌ Unexpected: GraalPy LLM should have failed but succeeded"
            exit 1
          fi

  graalpy-full-suite:
    name: GraalPy Full Suite (run all demos)
    runs-on: ubuntu-latest
    needs: [graalpy-smoke-test, graalpy-cpython-llama]
    steps:
      - uses: actions/checkout@v4

      - name: Set up GraalVM
        uses: graalvm/setup-graalvm@v1
        with:
          distribution: graalvm-community
          java-version: "25"
          github-token: ${{ secrets.GITHUB_TOKEN }}

      - name: Set up Gradle
        uses: gradle/actions/setup-gradle@v4

      - name: Set up Python
        uses: actions/setup-python@v5
        with:
          python-version: '3.12'

      - name: Download model
        run: |
          mkdir -p ~/.llama/models
          curl -L -o ~/.llama/models/Llama-3.2-1B-Instruct-f16.gguf \
            "https://huggingface.co/bartowski/Llama-3.2-1B-Instruct-GGUF/resolve/main/Llama-3.2-1B-Instruct-f16.gguf"

      - name: Setup Python venv
        run: |
          cd demos/graalpy
          python3 -m venv .venv
          source .venv/bin/activate
          pip install llama-cpp-python

      - name: Run full suite (runtimeCheck + llamaPython will pass, llama will fail)
        continue-on-error: true
        run: ./gradlew :demos:graalpy:run --no-daemon

      - name: Summary
        run: |
          echo "GraalPy Demo Suite Complete:"
          echo "  ✅ runtimeCheck - Basic GraalPy embedding"
          echo "  ✅ llamaPython - CPython LLM inference"
          echo "  ❌ llama - GraalPy LLM (expected failure)"