Re: [PATCH] ob-plantuml: Allow setting PlantUML args for jar file

[Ihor Radchenko]

Dejan Josifović <www.paranoidtimes@gmail.com> writes:

> But, since ob-plantuml already had variable for arguments for executable 
> it fells natural to me to have customizable variables for when using 
> jar. These headers are of course easier, but the user would have to 
> write them on each source block to achieve something that should be 
> globally customizable (like charset).

FYI, you can customise any header arg globally. See manual page 16.3
Using Header Arguments.

> I second the concern that Max stated:
>> Is there a case when some arguments are suitable for dedicated binary but 
>> should be avoided for jar (when a user has both executable from system 
>> package and manually downloaded jar having newer version)? It may be a 
>> reason to have separate variables (or header arguments).
> I believe it is better design decision to separate arguments for 
> executable and jar.

I am not sure about this specific case. The PlantUML executable is
literally a wrapper around java call to jar. Below is the contents of
plantuml file in my system:

#!/bin/bash
gjl_package=plantuml
gjl_jar="plantuml.jar"
source /usr/share/java-config-2/launcher/launcher.bash

Unless it is any different on your side, the arguments for jar and
executable should be literally the same.

> Since we are making jar arguments customizable, we should think about 
> adding java arguments customizable (also mentioned by Max!). This line 
> in patch:
> +             "-Djava.awt.headless=true"
> can be also added to a separate variable.

I feel that running headless mode in the ob-plantuml is deliberate. We
may not want users to change it. Otherwise, you are free to customize
java arguments in org-babel-default-header-args:plantuml

> Lastly, there is a typo in the patch:
> +** Removed or renamed functions and variables
> +*** =org-plantump-executable-args= is renamed and applies to jar as well
> +
> +The new variable name is =org-plantump-args=.  It now applies to both
> +jar PlantUML file and executable.
> Word plantump should be plantuml I guess. :-)

Thanks! Will fix.

Best,
Ihor