lightning/.github/workflows/docs-checks.yml

name: "Docs check"
# https://github.com/marketplace/actions/sphinx-build

on:  # Trigger the workflow on push or pull request, but only for the master branch
  push:
    branches: [master, "release/*"]
  pull_request:
    branches: [master, "release/*"]

jobs:
  sphinx-check:
    runs-on: ubuntu-20.04
    steps:
    - uses: actions/checkout@v2
    - uses: ammaraskar/sphinx-action@master
      with:
        # git is required to clone the docs theme
        # before custom requirement are resolved https://github.com/ammaraskar/sphinx-action/issues/16
        pre-build-command: "apt-get update -y && apt-get install -y git && pip install -r requirements/docs.txt"
        docs-folder: "docs/"
        repo-token: "${{ secrets.GITHUB_TOKEN }}"

  test-docs:
    runs-on: ubuntu-20.04

    steps:
      - uses: actions/checkout@v2
      - uses: actions/setup-python@v2
        with:
          python-version: 3.7

      # Note: This uses an internal pip API and may not always work
      # https://github.com/actions/cache/blob/master/examples.md#multiple-oss-in-a-workflow
      - name: Cache pip
        uses: actions/cache@v2
        with:
          path: ~/.cache/pip
          key: ${{ runner.os }}-pip-${{ hashFiles('requirements.txt') }}
          restore-keys: |
            ${{ runner.os }}-pip-

      - name: Install dependencies
        run: |
          python --version
          pip --version
          # remove Horovod from requirements
          python -c "fname = 'requirements/extra.txt' ; lines = [line for line in open(fname).readlines() if not line.startswith('horovod')] ; open(fname, 'w').writelines(lines)"
          # python -m pip install --upgrade --user pip
          pip install --requirement requirements.txt --upgrade-strategy only-if-needed --find-links https://download.pytorch.org/whl/cpu/torch_stable.html --quiet
          pip install --requirement requirements/extra.txt
          pip install --requirement requirements/loggers.txt
          pip install --requirement requirements/docs.txt
          pip list
        shell: bash

      - name: Test Documentation
        env:
          SPHINX_MOCK_REQUIREMENTS: 0
        run: |
          # First run the same pipeline as Read-The-Docs
          apt-get update && sudo apt-get install -y cmake
          cd docs
          make doctest
          make coverage

  make-docs:
    runs-on: ubuntu-20.04

    steps:
      - uses: actions/checkout@v2
      - uses: actions/setup-python@v2
        with:
          python-version: 3.7

      # Note: This uses an internal pip API and may not always work
      # https://github.com/actions/cache/blob/master/examples.md#multiple-oss-in-a-workflow
      - name: Cache pip
        uses: actions/cache@v2
        with:
          path: ~/.cache/pip
          key: ${{ runner.os }}-pip-${{ hashFiles('requirements.txt') }}
          restore-keys: |
            ${{ runner.os }}-pip-

      - name: Install dependencies
        run: |
          python --version
          pip --version
          # pip install --requirement requirements.txt --upgrade-strategy only-if-needed --find-links https://download.pytorch.org/whl/cpu/torch_stable.html --quiet
          pip install --requirement requirements/docs.txt
          # install Texlive, see https://linuxconfig.org/how-to-install-latex-on-ubuntu-20-04-focal-fossa-linux
          sudo apt-get update && sudo apt-get install -y texlive-latex-extra dvipng texlive-pictures
          pip list
        shell: bash

      - name: Make Documentation
        run: |
          # First run the same pipeline as Read-The-Docs
          cd docs
          make clean
          make html --debug --jobs $(nproc) SPHINXOPTS="-W"

      - name: Upload built docs
        uses: actions/upload-artifact@v2
        with:
          name: docs-results-${{ github.sha }}
          path: docs/build/html/
        # Use always() to always run this step to publish test results when there are test failures
        if: success()