[Bug 273748] textproc/rubygem-asciidoctor-plantuml

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=273748

            Bug ID: 273748
           Summary: textproc/rubygem-asciidoctor-plantuml
           Product: Ports & Packages
           Version: Latest
          Hardware: amd64
                OS: Any
            Status: New
          Severity: Affects Many People
          Priority: ---
         Component: Individual Port(s)
          Assignee: sunpoet@FreeBSD.org
          Reporter: bsdunix44@gmail.com
          Assignee: sunpoet@FreeBSD.org
             Flags: maintainer-feedback?(sunpoet@FreeBSD.org)

Created attachment 244798
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=244798&action=edit
Image of the debug info Java throws when using the asciidoctor-plantuml rubygem
to render the above plantuml

Trying to render PlantUML in an asciidoc document using asciidoctor-plantuml
fails in almost every block of plantuml I try to render.

Specifically, for a simple example, the following block causes it to fail with
the attached image (debug info), using the following command line: asciidoctor
-b html5 -o index.html -r asciidoctor-diagram example.adoc -w

[#techwriting-UI,reftext=UI]
== User Interface

=== The login window

====
_See Example 1. Login Window._
====

[plantuml, format=svg]
....
@startsalt
title Example 1, Login Window

{+
  Login    | "MyName   "
  Password | "****     "
  [Cancel] | [  OK   ]
}
@endsalt
....

What I've noted is the following in trying to figure this out:

1) The above block renders as it should on the https://plantuml.com/ main page.
They have an online demo server you can paste uml into and it renders it on the
fly. So the syntax is correct.

2) Our port of asciidoctor-plantuml is 0.1.1 released may 1st 2022. The latest
release of asciidoctor-plantuml is v1.2023.10 released July 23rd of this year.
So the rubygem in ports is over a year out of date. But when I checked the
rubygem homepage our port is the latest version of the rubygem. I think it's
the upstream rubygem maintainer that needs to roll a new release. If that's the
case then you can close this PR and I will just poke the rubygem maintainer. 

3) Our asciidoctor-diagram port is v2.0.0 released December 15th 2019. The
current asciidoctor-diagram version is v2.2.12 released 3 days ago. That makes
our asciidoctor-diagram over 3 years old. Granted I should file a PR to see if
that can be updated but I am noting it here as it is involved in the rendering
of plantuml diagrams.

4) I'm pretty sure it's the asciidoctor-plantuml port and not the
asciidoctor-diagram port but I am not 100% certain, that is at issue here. 

Whatever is breaking, is making it impossible to render plantuml in asciidoc.

Also, what is the deal with:

rubygem-asciidoctor-plantuml-0.1.1 Asciidoctor PlantUML extension
rubygem-asciidoctor-plantuml00-0.0.16 Asciidoctor PlantUML extension

There is no difference in the description. Other than the different version
formatting could we possibly update the descriptions to make it easier to
understand the difference? Do we need two versions? I don't understand why
rubygem-asciidoctor-plantuml00-0.0.16 is in ports.

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