It would be nice if was possible to use a [PlantUML Server](https://github.com/plantuml/plantuml-server) to parse the UML stuff instead of installing it locally with all its dependencies (first integration in this way seen at [GitLab](https://docs.gitlab.com/ce/administration/integration/plantuml.html)). This would make it very easy to use it in combination with a CI server, regardless of the operating system of the development machine and the build server.
This issue appears to be discussing a feature request or bug report related to the repository. Based on the content, it seems to be still under discussion. The issue was opened by rose-a and has received 2 comments.