Plantuml/graphviz crashes on some diagrams on alpine linux arm 64

[laughingbiscuit]

Any ideas what the root cause is? Here is my script to replicate:

#!/bin/sh
set -e
set -x
# display architecture
uname -a

# install java
apk add openjdk8

# Get PlantUML
wget https://github.com/plantuml/plantuml/releases/download/v1.2022.4/plantuml-1.2022.4.jar
# Write code
echo -e "@startuml \n database Database {\n}\n@enduml" > example.puml
# Run plantuml
java -jar plantuml-1.2022.4.jar example.puml

Output attached.
output.log.txt

[laughingbiscuit]

Note - if testing is required you can install Termux (https://github.com/termux/termux-app) on Android and install alpine with this helper (https://github.com/Hax4us/TermuxAlpine) and run the script above to replicate on any Android 10/11 device. Raspberry Pi on alpine is the same. Not sure about ARM Mac OSs

[soloturn]

does dot iself work, like described e.g. here:
https://graphviz.org/doc/info/command.html

[laughingbiscuit]

$ echo 'digraph { a -> b }' | dot > output.svg
There is no layout engine support for "dot"
Perhaps "dot -c" needs to be run (with installer's privileges) to register the plugins?

so it appears to be a problem with dot / graphviz installation via. apk I guess.

However, in my example I did not install dot with a package manager so this problem may be unrelated (https://stackoverflow.com/questions/69377104/unable-to-execute-dot-command-after-installation-of-graphviz-there-is-no-layou). I expected that since the JAR contains graphviz that package manager bugs are not relevant.

I will post back when I get dot working

[laughingbiscuit]

after downloading the graphviz release and building from source, it works. is there anything we can do to make the packaged graphviz work without this additional step?

[soloturn]

graphviz is not packaged with plantuml, but an optional dependency of the operating system package. e.g. here, arch linux:
https://github.com/archlinux/svntogit-community/blob/packages/plantuml/trunk/PKGBUILD

in alpine i cannot see that the package sets this dependency:
https://git.alpinelinux.org/aports/tree/community/plantuml/APKBUILD

you want to report it there, and close the issue here?

[SpyrosKou]

after downloading the graphviz release and building from source, it works. is there anything we can do to make the packaged graphviz work without this additional step?

I understand that this is not an issue of Plantuml but since it is a related and recurring issue to Plantuml usage in Alpine Linux, I would like to continue the conversation by asking the following.
Has anyone identified a faster way of fixing dot in Alpine linux from building graphviz from source?

[evantill]

could you try with this released image ?
https://github.com/plantuml/docker/pkgs/container/docker%2Fplantuml-cli
https://github.com/plantuml/docker/tree/main/plantuml-cli

[SpyrosKou]

could you try with this released image ? https://github.com/plantuml/docker/pkgs/container/docker%2Fplantuml-cli https://github.com/plantuml/docker/tree/main/plantuml-cli

Thank you for your answer.
It was not directly tried as openjdk:17-alpine had to be used.
An approach that worked was to add the following dependencies.

FROM openjdk:17-alpine
RUN apk --no-cache add graphviz
RUN apk --no-cache add dos2unix
RUN apk add --no-cache fontconfig ttf-dejavu
RUN apk add --no-cache --upgrade bash

Perhaps not all dependencies are strictly required.

However, by looking the Dockerfile in plantuml-cli the two approaches add graphviz and the dejavu fonts.