PlantUML is a great markup language for creating (not only) UML diagrams. Let’s try and make this tool work with Hugo + Asciidoc. Asciidoctor has an asciidoctor-diagram package in its toolset. This package should add support not only for PlantUML but also for GraphViz and other graphing markups. Cool. Asciidoctor-diagram was installed when setting up the platform, covered in the previous article If you try to add a simple PlantUML diagram now, you will probably get an empty picture.

Hugo has great support for Markdown. It works out-of-the-box altogether. However, I like Asciidoc more so I tried to set up the platform for writing pages with lots of source code listings. It became a task for masochists. If you are okay with Markdown, you should probably stay in that realm and enjoy simplicity. I tried several approaches. None of them seemed to work for me. External CSS according to Rgielen.