Ruby scripting: create PDF with prawn

Since you are talking about Prawn, you should already now use SikuliX in the Ruby version?

Or am I misunderstanding something?

If not, then you should also have a running Ruby installation, that can handle gems.
If not, you have to do that. And install the Prawn gem.

When you have that ready, then you have to add the needed setup to the SikuliX environment for the final require 'prawn' to work.

Hi RaiMan,
thanks for the comment.

Yes, I already use the Ruby version of SikuliX.
Yes, I have installed Ruby, I installed the Prawn gem... but, Sikuli mentions that "no such file to load."

Do I have to set certain settings so Sikuli can find the gem?

Code I use:
################
require "prawn"

Prawn::Document.generate("hello.pdf") do
  text "Hello World!"
end
################

I am not that (J)Ruby expert, but I guess you have to add

$LOADPATH << path-to-the-folder-containing-prawn.rb

before the
require "prawn"

because the SikuliX IDE environment does not know anything about all this standard JRuby and gem eco system.

When I use $LOADPATH
[error] NoMethodError ( (NoMethodError) undefined method `<<' for nil:NilClass )

I added the path to the reqiuer like this:
 require "C:\\Ruby22\\lib\\ruby\\gems\\2.2.0\\gems\\prawn-2.0.1\\lib\\prawn.rb"

Then the dependend gems started: "no such file", so I inculded them also...
    require "C:\\Ruby22\\lib\\ruby\\gems\\2.2.0\\gems\\ttfunk-1.4.0\\lib\\ttfunk.rb"
    require "C:\\Ruby22\\lib\\ruby\\gems\\2.2.0\\gems\\pdf-core-0.5.1\\lib\\pdf\\core.rb"
    require "C:\\Ruby22\\lib\\ruby\\gems\\2.2.0\\gems\\prawn-2.0.1\\lib\\prawn.rb"

But still... It doesn;t seem to work. The dependencies with the other gems act up.

I am sorry, but I am not the expert in Ruby and especially Gem handling.

I guess you have to look out for a method to activate the gem loading within an already running script.

Thanks for the help RaiMan.
I hope I will figure this out. If so, I will update this post.

Cheers!