Re: run a ruby script and use the standard output ???

[Hans Hagen <pragma@wxs.nl>]

Renaud AUBIN wrote:
> Hi all,
>
> Is it possible to run a ruby script from a context document during its 
> processing (I already know how to do that using \write18 but there is 
> maybe a better way...) then get the output of the script to display or 
> use it into the document. It's a little bit hard to describe so I have 
> a simple example:
>
> \starttext
> \def\vartest{3.124325234543523452435}
> \write18{ruby ./myscript.rb \vartest 
> XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX}
> \stoptext
>
> with myscript.rb:
>
> temp = ARGV[0]
> puts "\nXXXXXXXXXXXXX " + (Math::sqrt(temp.to_f)).to_s + " 
> XXXXXXXXXXXXX\n"
>
> I would store the result of puts into a variable usable within ConTeXt...
>
piping: the latest versions of pdftex support this (i\ve forgotten the syntax, but taco who wrote the patch may remember)

you can also let ruby write a definition to a file temp.tmp which you can read in 

however, luatex can do: 

\edef\SomeVar{\lua{tex.print(math.sqrt(3.124325234543523452435))} or 

\def\GimmeARoot#1{\lua{tex.print(math.sqrt(#1))}

actually, this is one of the examples i use in prelim demos at user group meetings -) 

so, be a bit patient and it will come your way ... 



Hans 


-----------------------------------------------------------------
                                          Hans Hagen | PRAGMA ADE
              Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
     tel: 038 477 53 69 | fax: 038 477 53 74 | www.pragma-ade.com
                                             | www.pragma-pod.nl
-----------------------------------------------------------------