name: Verify examples

on:
  workflow_call:
    inputs:
      python_version:
        description: 'Python version.'
        required: false
        default: '3.10'
        type: string

jobs:

  VerifyDocs:
    name: 👍 Verify example snippets using Python ${{ inputs.python_version }}
    runs-on: ubuntu-latest

    steps:
      - name: ⏬ Checkout repository
        uses: actions/checkout@v2

      - name: 🐍 Setup Python
        uses: actions/setup-python@v2
        with:
          python-version: ${{ inputs.python_version }}

      - name: 🐍 Install dependencies
        run: |
          pip3 install .

      - name: ✂ Extract code snippet from README
        shell: python
        run: |
          from pathlib import Path
          import re

          ROOT = Path('.')

          with (ROOT / 'README.md').open('r') as rptr:
              content = rptr.read()

          m = re.search(r"```py(thon)?(?P<code>.*?)```", content, re.MULTILINE|re.DOTALL)

          if m is None:
              raise Exception("Regular expression did not find the example in the README!")

          with (ROOT / 'tests/docs/example.py').open('w') as wptr:
              wptr.write(m["code"])

      - name: Print example.py
        run: cat tests/docs/example.py

      - name: ☑ Run example snippet
        working-directory: tests/docs
        run: |
          python3 example.py