python-app.yml

# This workflow will install Python dependencies, run tests and lint with a single version of Python
# For more information see: https://docs.github.com/en/actions/automating-builds-and-tests/building-and-testing-python

name: Python application

on:
  push:
    branches: [ "main" ]
    tags:
      - "*.*.*"
  pull_request:
    branches: [ "main" ]

permissions:
  contents: read
  id-token: write

jobs:
  build:
    runs-on: ubuntu-latest

    steps:
    - uses: actions/checkout@v4

    # Install system dependencies: Mosquitto + Postgres + OpenSSL
    - name: Install system packages
      run: |
        sudo apt-get update
        sudo apt-get install -y mosquitto mosquitto-clients postgresql postgresql-contrib openssl

    # Initialize local Postgres
    - name: Start Postgres
      run: |
          sudo service postgresql start
          sudo -u postgres psql -c "CREATE USER admin WITH PASSWORD 'secret' CREATEDB;"
          sudo -u postgres psql -c "CREATE DATABASE rembus_test OWNER admin;"

    # Generate temporary MQTT TLS certs for local Mosquitto
    - name: Generate temporary MQTT TLS certificates
      run: |
        mkdir -p tests/cfg

        # CA
        openssl req -x509 -nodes -newkey rsa:2048 -days 1 \
          -subj "/CN=Rembus-Test-CA/C=IT/L=Trento" \
          -keyout tests/cfg/rembus-ca.key \
          -out tests/cfg/rembus-ca.crt \
          -addext "keyUsage = critical, keyCertSign, cRLSign" \
          -addext "basicConstraints = critical, CA:TRUE"

        # Broker key + CSR
        openssl req -nodes -newkey rsa:2048 \
          -subj "/CN=localhost" \
          -keyout tests/cfg/rembus.key \
          -out tests/cfg/rembus.csr

        # Create SAN config file
        cat > tests/cfg/rembus.ext <<EOF
        authorityKeyIdentifier=keyid,issuer
        basicConstraints=CA:FALSE
        keyUsage = digitalSignature, nonRepudiation, keyEncipherment, dataEncipherment
        subjectAltName = @alt_names

        [alt_names]
        DNS.1 = localhost
        IP.1 = 127.0.0.1
        EOF

        # Sign broker cert
        openssl x509 -req -in tests/cfg/rembus.csr \
          -CA tests/cfg/rembus-ca.crt -CAkey tests/cfg/rembus-ca.key \
          -CAcreateserial -out tests/cfg/rembus.crt -days 1 \
          -extfile tests/cfg/rembus.ext

    # Start Mosquitto locally with TLS enabled
    - name: Start local Mosquitto
      run: |
        cat > tests/cfg/mosquitto.conf <<EOF
        listener 1883
        allow_anonymous true
            
        listener 8883
        cafile $(pwd)/tests/cfg/rembus-ca.crt
        certfile $(pwd)/tests/cfg/rembus.crt
        keyfile $(pwd)/tests/cfg/rembus.key
        allow_anonymous true
        EOF
        chmod 644 tests/cfg/rembus-*.crt tests/cfg/rembus.key
        sudo systemctl stop mosquitto
        mosquitto -c tests/cfg/mosquitto.conf -d
        sleep 2
        ss -ltnp | grep 1883 || (echo "Mosquitto not listening!" && exit 1)
          
    # Set up Python
    - name: Set up Python 3.11
      uses: actions/setup-python@v4
      with:
        python-version: "3.11"

    - name: Install dependencies
      run: |
        python -m pip install --upgrade pip
        pip install flake8
        pip install .[test]
        pip install -e .

    - name: Lint with flake8
      run: |
        flake8 . --count --select=E9,F63,F7,F82 --show-source --statistics
        flake8 . --count --exit-zero --max-complexity=10 --max-line-length=80 --statistics

    - name: Run tests with pytest
      env:
        PGHOST: localhost
        PGPORT: 5432
        PGUSER: admin
        PGPASSWORD: secret
        MQTT_HOST: 127.0.0.1
        MQTT_PORT: 1883
        MQTTS_PORT: 8883
        MQTT_CA_CERT: ${{ github.workspace }}/tests/cfg/rembus-ca.crt
        MQTT_CERT: ${{ github.workspace }}/tests/cfg/rembus.crt
        MQTT_KEY: ${{ github.workspace }}/tests/cfg/rembus.key
      run: |
        pytest tests --asyncio-mode=auto

    - name: Upload coverage to Codecov
      if: github.event_name == 'push'
      uses: codecov/codecov-action@v5
      with:
        token: ${{ secrets.CODECOV_TOKEN }}

    - name: Build distribution
      if: github.event_name == 'push'
      run: |
        pip install build
        python -m build

    - name: Upload dist as artifact
      uses: actions/upload-artifact@v4
      with:
        name: dist
        path: dist/

  publish-to-pypi:
    name: Publish Python 🐍 distribution 📦 to PyPI
    if: startsWith(github.ref, 'refs/tags/')
    needs: build
    runs-on: ubuntu-latest
    environment:
      name: pypi
      url: https://pypi.org/p/rembus
    steps:
      - uses: actions/download-artifact@v4
        with:
          name: dist
          path: dist
      - name: Publish package to PyPI
        uses: pypa/gh-action-pypi-publish@release/v1
        with:
          attestations: true