generate-images-drawio.yml

name: draw.io images

on:
  push:
    branches: 
    - '**'
    paths:
    - '.github/workflows/generate-images-drawio.yml'
    - 'src/drawio/**'

  workflow_dispatch:

env:
  DRAWIO_VERSION: 24.2.5
  DRAWIO_SRC: src/drawio
  DRAWIO_OUT: images/drawio

jobs:
  generate:
    runs-on: ubuntu-latest

    steps:
      - name: Check out repository
        uses: actions/checkout@v4

      - name: Set up Xvfb & draw.io desktop
        run: |
            wget -q https://github.com/jgraph/drawio-desktop/releases/download/v${{ env.DRAWIO_VERSION }}/drawio-amd64-${{ env.DRAWIO_VERSION }}.deb
            sudo apt-get update
            sudo apt-get install --yes --no-install-recommends xvfb ./drawio-amd64-${{ env.DRAWIO_VERSION }}.deb

      - name: Prepare output folder
        run: |
          rm -rf "${{ env.DRAWIO_OUT }}"
          mkdir -p "${{ env.DRAWIO_OUT }}"

      - name: Export draw.io files as png / svg
        run: |
          # draw.io desktop requires a running X server
          export DISPLAY=:42
          Xvfb :42 -nolisten unix &

          for ext in png svg; do
            # The chromium args need to be specified last because of whatever
            drawio --export --recursive --format $ext "${{ env.DRAWIO_SRC }}" --no-sandbox --disable-gpu --disable-dev-shm-usage

            rsync -v --recursive --include="*.$ext" --filter="-! */" "${{ env.DRAWIO_SRC }}"/* "${{ env.DRAWIO_OUT }}"

            # Nuke the exported files so that draw.io desktop doesn't attempt to use them as input files on the next loop pass
            find "${{ env.DRAWIO_SRC }}" -name "*.$ext" -exec rm -v "{}" \;  
          done

      - name: Add & Commit
        uses: EndBug/add-and-commit@v9
        with:
          add: ${{ env.DRAWIO_OUT }}
          pull: --rebase --autostash