name: Docs

on:
  pull_request:
    paths:
      - 'docs/**'
  push:
    branches:
      - main
    paths:
      - 'docs/**'

jobs:
  docs:
    runs-on: ubuntu-latest
    name: docs
    steps:
      - name: Checkout
        uses: actions/checkout@v2
      - name: Set up Python
        uses: actions/setup-python@v2
        with:
          python-version: 3.9
      - name: Cache dependencies
        uses: actions/cache@v2
        with:
          path: ~/.cache/pip
          key: ${{ runner.os }}-pip-${{ hashFiles('docs/requirements.txt') }}
          restore-keys: |
            ${{ runner.os }}-pip-
      - run: python -m pip install -r docs/requirements.txt
      - name: Build docs
        run: |
          cd docs
          sphinx-build -b spelling -n -q -W --keep-going -d _build/doctrees -D language=en_US -j auto . _build/spelling