update help instructions re local plantuml installation

[abulka]

With info re win10 and updated java technique.

To install a plantuml server locally please follow the instructions in the pynsource help file viz.

Windows 10

Install Java. Maven works OK under Windows.
And the normal instructions work.

git clone https://github.com/plantuml/plantuml-server.git
cd plantuml-server
mvn jetty:run

Mac

install brew see https://brew.sh/

install java

old way:

brew tap adoptopenjdk/openjdk
brew cask install adoptopenjdk8

new way:

brew install --cask temurin

install maven, clone the repo and run

brew install maven
git clone https://github.com/plantuml/plantuml-server.git
cd plantuml-server
mvn jetty:run

verify by visiting your local page

http://localhost:8080/plantuml/

Linux

Install Java then pretty much the same thing:

sudo apt install maven
git clone https://github.com/plantuml/plantuml-server.git
cd plantuml-server
mvn jetty:run

Increase size of diagrams

Set the environment variable PLANTUML_LIMIT_SIZE=8192.

[abulka]

Contribution from Ivan:

• JDK 11 for Windows https://www.techspot.com/downloads/5553-java-jdk.html (Downloading JDK from Oracle require registration. JRE 11 is no more existing.)

• Git for Windows https://git-scm.com/download/win

• Maven https://maven.apache.org/download.cgi (Operating System No minimum requirement. Start up scripts are included as shell scripts and Windows batch files.)

Use Command prompt (cmd.exe) for all commands. First run of Maven (mvn jetty:run) quickly generates a lot of commands (log attached).

For large UML diagrams run set PLANTUML_LIMIT_SIZE=8192 in Command prompt.

Use Ctrl-C to stop JETTY. Don’t forget to add PATHs for Java, Git and Maven.