name: Generate Documentation
description: Updates Sphinx-based documentation
inputs:
  sourceDirectory:
    description: Path to repository checkout
    required: false
    default: ${{ github.workspace }}
  disableLinkExtensions:
    description: Disable Sphinx link extensions
    required: false
    default: 'false'
runs:
  using: composite
  steps:
    - name: Update Version Number and Copyright ↗️
      id: setup
      shell: bash
      run: |
        : Update Version Number and Copyright ↗️
        if [[ "${RUNNER_DEBUG}" ]]; then set -x; fi

        : "${major:=}"
        : "${minor:=}"
        : "${patch:=}"

        # This expression will first try to match all the LIBOBS_API_[...]_VER
        # lines in 'obs-config.h', before removing the '#define ' prefix and
        # trimming away whitespace characters and linebreaks.
        # This will yield a single line with the each major, minor, and patch
        # version variable name followed by its value, so every even item
        # in this string will contain a version part.

        read -r _ major _ minor _ patch _ <<< \
          "$(grep -E -e "#define LIBOBS_API_(MAJOR|MINOR|PATCH)_VER *" libobs/obs-config.h \
            | sed 's/#define //g' \
            | tr -s ' ' \
            | tr '\n' ' ')"

        # This expression simply replaces the definition of the 'version' and
        # 'release' variables in the Python script with updated variants using
        # the version tokens set by the previous expression.
        # The copyright variable assignment is updated to use the current
        # local year as the second year value.

        sed -i -E \
          -e "s/version = '([0-9]+\.[0-9]+\.[0-9]+)'/version = '${major}.${minor}.${patch}'/g" \
          -e "s/release = '([0-9]+\.[0-9]+\.[0-9]+)'/release = '${major}.${minor}.${patch}'/g" \
          -e "s/copyright = '(2017-[0-9]+, Lain Bailey)'/copyright = '2017-$(date +"%Y"), Lain Bailey'/g" \
          ${{ inputs.sourceDirectory }}/docs/sphinx/conf.py

        if [[ '${{ inputs.disableLinkExtensions }}' == 'true' ]]; then
          sed -i -e "s/html_link_suffix = None/html_link_suffix = ''/g" \
           ${{ inputs.sourceDirectory }}/docs/sphinx/conf.py
          echo "artifactName=OBS Studio Docs (No Extensions)" >> $GITHUB_OUTPUT
        else
          echo "artifactName=OBS Studio Docs" >> $GITHUB_OUTPUT
        fi

        echo "commitHash=${GITHUB_SHA:0:9}" >> $GITHUB_OUTPUT

    - name: Install Sphinx 📜
      uses: totaldebug/sphinx-publish-action@a44364271972de3b13c5b63801c2596dfde82413
      with:
        sphinx_src: ${{ inputs.sourceDirectory }}/docs/sphinx
        build_only: true
        target_branch: master
        target_path: '../home/_build'

    - uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02
      with:
        name: ${{ steps.setup.outputs.artifactName }} ${{ steps.setup.outputs.commitHash }}
        path: |
          ${{ runner.temp }}/_github_home/_build
          !${{ runner.temp }}/_github_home/_build/.doctrees
