python-package.yml

# This workflow will install Python dependencies, run tests and lint with a variety of Python versions
# For more information see: https://help.github.com/actions/language-and-framework-guides/using-python-with-github-actions

name: Python package

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

jobs:
  build:

    runs-on: ubuntu-latest
    strategy:
      fail-fast: false
      matrix:
        python-version: ["3.9", "3.10", "3.11", "3.12", "3.13"]

    steps:
    - uses: actions/checkout@v4
    - name: Set up Python ${{ matrix.python-version }}
      uses: actions/setup-python@v5
      with:
        python-version: ${{ matrix.python-version }}
    - name: Install dependencies
      run: |
        python -m pip install --upgrade pip
        python -m pip install flake8 pip-audit
        pip install -r requirements-test-${{ matrix.python-version }}.txt
    - name: Check dependencies for known security vulnerabilities
      run: pip-audit -r requirements-test-${{ matrix.python-version }}.txt
    - name: Lint with flake8
      run: |
        # stop the build if there are Python syntax errors or undefined names
        flake8 . --count --select=E9,F63,F7,F82 --show-source --statistics
        # exit-zero treats all errors as warnings. The GitHub editor is 127 chars wide
        flake8 . --count --exit-zero --max-complexity=10 --max-line-length=120 --statistics
    - name: Prepare to test
      run: |
        sudo apt-get install wait-for-it
        curl -L https://github.com/matthew-shaw/govuk-frontend-diff/releases/download/v2.0.0/govuk-frontend-diff-linux --output govuk-frontend-diff
        chmod +x govuk-frontend-diff
    - name: Test with govuk-frontend-diff
      run: |
        (cd tests/utils && nohup python -m flask run --port 3000 &)
        wait-for-it localhost:3000
        ./govuk-frontend-diff http://localhost:3000 --govuk-frontend-version=v5.7.1 --exclude page-template --ci