name: deploy-sphinx-documentation-to-pages

on:
  pull_request:
    types: [opened, synchronize]
    paths:
      - 'docs/sphinx_doc/**/*'
  push:
    branches:
      - main

jobs:
  pages:
    runs-on: ubuntu-20.04
    steps:
    - name: Checkout
      uses: actions/checkout@v4
    - name: Setup Python
      uses: actions/setup-python@master
      with:
        python-version: '3.10'
    - name: Choose Pandoc
      shell: bash
      run: |
        case $RUNNER_OS in
          "Linux")
              printf 'INSTALLER_SUFFIX=1-amd64.deb' >> $GITHUB_ENV
              ;;
           "macOS")
              printf 'INSTALLER_SUFFIX=macOS.pkg' >> $GITHUB_ENV
              ;;
            *)
              printf 'Do not know how to install pandoc on %s\n' "$RUNNER_OS"
              exit 1
              ;;
        esac
    - name: Download Pandoc
      shell: bash
      env:
        GITHUB_TOKEN: ${{ github.token }}
        REPO: jgm/pandoc
        DOWNLOAD_URL: 'https://github.com/jgm/pandoc/releases/download/'
      run: |
        gh release download ${{ inputs.version }} \
            --repo "$REPO" \
            --pattern '*'${{ env.INSTALLER_SUFFIX }}
        printf 'INSTALLER_VERSION=%s' \
               "$(ls pandoc-*-${{ env.INSTALLER_SUFFIX }} | \
                      sed 's/pandoc-\([0-9.]*\)-.*/\1/')" \
               >> $GITHUB_ENV
    - name: Install Pandoc
      shell: bash
      env:
        INSTALLER: pandoc-${{ env.INSTALLER_VERSION }}-${{ env.INSTALLER_SUFFIX }}
      run: |
        case $RUNNER_OS in
          "Linux")
              sudo apt install ./$INSTALLER
              ;;
           "macOS")
              sudo installer -pkg ./$INSTALLER -target '/'
              ;;
            *)
              echo "$RUNNER_OS not supported"
              exit 1
              ;;
        esac
        rm $INSTALLER
    - name: Install Sphinx Dependencies
      run: |
        python -m pip install --upgrade pip
        pip install -r requirements.txt
        pip install -r docs/sphinx_doc/requirements.txt
    - name: Build Documentation
      run: |
        cd docs/sphinx_doc
        bash build_sphinx_doc.sh
    - name: Upload Documentation
      uses: actions/upload-artifact@v3
      with:
        name: SphinxDoc
        path: 'docs/sphinx_doc/build/html'
    - name: Push Pages
      uses: peaceiris/actions-gh-pages@v3
      if: ${{ github.event_name == 'push' && github.ref == 'refs/heads/main' }}
      with:
        github_token: ${{ secrets.GITHUB_TOKEN }}
        publish_dir: 'docs/sphinx_doc/build/html'