name: Build docs
on:
  pull_request:
  push:
    branches:
    - master
    - 'release/*'

# https://docs.github.com/en/actions/writing-workflows/workflow-syntax-for-github-actions#concurrency
# Ensure that only one commit will be running tests at a time on each PR
concurrency:
  group: ${{ github.ref }}-${{ github.workflow }}
  cancel-in-progress: true

env:
  EM_VERSION: 2.0.4
  EM_CACHE_FOLDER: 'emsdk-cache'
jobs:
  build-and-deploy:
    if: github.repository == 'lvgl/lvgl'
    runs-on: ubuntu-24.04
    steps:
      - name: Checkout
        uses: actions/checkout@v6
        with:
          persist-credentials: false
          fetch-depth: 0
      - name: Setup Python
        uses: actions/setup-python@v6
        with:
          python-version: '3.12'
      - name: Cache Python packages
        uses: actions/cache@v5
        with:
          # Cache the Python package environment, excluding pip and setuptools installed by setup-python
          path: |
            ~/.cache/pip
            ${{ env.pythonLocation }}/bin/*
            ${{ env.pythonLocation }}/include
            ${{ env.pythonLocation }}/lib/python*/site-packages/*
            !${{ env.pythonLocation }}/bin/pip*
            !${{ env.pythonLocation }}/lib/python*/site-packages/pip*
            !${{ env.pythonLocation }}/lib/python*/site-packages/setuptools*
          key: ${{ env.pythonLocation }}-${{ hashFiles('docs/requirements.txt') }}
      - name: Install Doxygen and Latex dependencies
        run: |
          sudo apt-get update
          sudo apt-get install doxygen texlive-xetex texlive-binaries texlive-lang-english latexmk fonts-freefont-otf
      - name: Install requirements
        run: |
          pip install -r docs/requirements.txt
      - name: Setup Emscripten cache
        id: cache-system-libraries
        uses: actions/cache@v5
        with:
          path: ${{env.EM_CACHE_FOLDER}}
          key: ${{env.EM_VERSION}}-${{ runner.os }}
      - uses: mymindstorm/setup-emsdk@v14
        with:
          version: ${{env.EM_VERSION}}
          actions-cache-folder: ${{env.EM_CACHE_FOLDER}}
      - name: ccache
        uses: hendrikmuhs/ccache-action@v1
      - name: Build examples (with cache)
        run: |
          # Grab the current name in case the LVGL folder is not called lvgl
          # as it could be the case if this is running from a fork
          LVGL_FOLDER=$(pwd)
          # Move to the parent folder to fetch emscripten port.
          cd ..
          ./lvgl/scripts/build_html_examples.sh --symlink $LVGL_FOLDER
      - name: Build docs
        run: docs/build.py html
      - name: Remove .doctrees
        run: rm -rf docs/build/html/.doctrees
      - name: Retrieve version
        run: |
          echo "::set-output name=VERSION_NAME::$(scripts/find_version.sh)"
        id: version
      - name: Deploy to subfolder
        if: ${{ github.event_name == 'push' && (github.ref == 'refs/heads/master' || startsWith(github.ref, 'refs/heads/release/')) }}
        uses: JamesIves/github-pages-deploy-action@v4.8.0
        with:
          token: ${{ secrets.LVGL_BOT_TOKEN }}
          repository-name: lvgl/docs
          branch: gh-pages # The branch the action should deploy to.
          folder: docs/build/html  # The folder the action should deploy.
          target-folder: ${{ steps.version.outputs.VERSION_NAME }}
          git-config-name: lvgl-bot
          git-config-email: lvgl-bot@users.noreply.github.com
          single-commit: true
      - name: Deploy to master
        if: ${{ github.event_name == 'push' && github.ref == 'refs/heads/master' }}
        uses: JamesIves/github-pages-deploy-action@v4.8.0
        with:
          token: ${{ secrets.LVGL_BOT_TOKEN }}
          repository-name: lvgl/docs
          branch: gh-pages # The branch the action should deploy to.
          folder: docs/build/html  # The folder the action should deploy.
          target-folder: master
          git-config-name: lvgl-bot
          git-config-email: lvgl-bot@users.noreply.github.com
          commit: true
