avisi-cloud/structurizr-site-generatr

structurizr-site-generatr can't find dot executable (but plantuml can)

hertzsprung opened this issue · 6 comments

hertzsprung commented

On xubuntu 22.04 I install graphviz and dot with apt install graphviz. dot is installed at /usr/bin/dot.
From structurizr-site-generatr/lib (version 1.0.25), running java -jar plantuml-1.2023.1.jar -testdot succeeds with:

dot version: dot - graphviz version 2.43.0 (0)
Installation seems OK. File generation OK

But when running structurizr-site-generatr serve and visiting localhost:8080 I get the error:

Dot Executable: /opt/local/bin/dot
File does not exist
Cannot find Graphviz. You should try

@startuml
testdot
@enduml

or

java -jar plantuml.jar -testdot

This error comes from plantuml.

Why can plantuml find dot but structurizr-site-generatr can't? Is structurizr-site-generatr actually looking for /opt/local/bin/dot or is the error message misleading?

qtzar commented

Is there a stacktrace in the console during site generation?

From the PlantUML docs :

By default, the dot executable is expected:

Firstly in: /usr/local/bin/dot
Then in: /usr/bin/dot

You can also specify the environment variable GRAPHVIZ_DOT to set the exact location of your GraphViz executable.

I had the exact same error on one of my machines and then realized that I had not installed Graphviz yet on that machine but that isn't very helpful as you say you have it installed.

hertzsprung commented

I see no stacktraces in the console. I also tried symlinking /opt/local/bin/dot to /usr/bin/dot but the error is the same.

qtzar commented

Just took some time to install XUbuntu 22.04 and JDK19 in a virtual machine and I cannot duplicate the issue.

I did notice that Graphviz was already installed as part of the XUbuntu base install.

Sorry that this hasn't been very helpful.

hertzsprung commented

How strange, thanks so much for taking a look! I started with the minimal install (selected in the xubuntu graphical installer) and installed graphviz separately.

dirkgroot commented

Structurizr Site Generatr does not check whether or not dot exists, so this is 100% PlantUML.

When this error occurs, structurizr-site-generatr should also print a stack trace to the console. Is this the case? If yes, could you please paste it here? This could be helpful in determining why this error occurs.

hertzsprung commented

I don't know what changed (perhaps I just need to reboot) but this is working for me now.