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plantuml-markdown

Example project showing how to use PlantUML and embed UML diagrams into a GitHub markdown

Often the need arises how to create and share UML diagrams for architecture documentation without pain-in-the-**** tools like MS Visio.

After some research, I found this great post about PlantUML. There are simply 2 components you need:

1. A PlantUML editor - simply use http://www.plantuml.com/plantuml/uml/ (or host your own on-premise with the plantUML Docker image)
2. Integrate PlantUML render engine with GitHub README.md markdown

1. A PlantUML editor

Visit the online editor http://www.plantuml.com/plantuml/uml/ and write your UML diagram with code & use a cheat sheet like this: https://ogom.github.io/draw_uml/plantuml/

This project contains an example example-uml.iuml:

@startuml
actor client
node app
node car
node tshirt

car -> app
app -> client
client -> tshirt
@enduml

There's also an IntelliJ plugin for PlantUML.

2. Integrate PlantUML render engine with GitHub markdown

This part is simple, yet effective :) Simply use the PlantUML proxy http://www.plantuml.com/plantuml/proxy to render your *.iuml files and embed them like images:

![your-UML-diagram-name](http://www.plantuml.com/plantuml/proxy?cache=no&src=https://raw.githubusercontent.com/jonashackt/plantuml-markdown/master/example-uml.iuml)

Use the RAW version of your *.iuml files like that: https://raw.githubusercontent.com/jonashackt/plantuml-markdown/master/example-uml.iuml and prefix it with src=.

Also you should use the cache=no option so that GitHub always renders the currently committed version of your PlantUML *.iuml files.

That's all - simply see the diagram live: