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

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

[Renaud AUBIN]

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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...


Renaud

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

[Hans Hagen]

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 


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

[Taco Hoekwater]

Hans Hagen wrote:
> piping: the latest versions of pdftex support this (i\ve forgotten the syntax, but taco who wrote the patch may remember)

piping syntax:

   \input "|ruby ./myscript.rb \vartest XXXXXXXXX"

the magic trick is the | symbol. With your current tex:

   \writ18{ruby ./myscript.rb \vartest XXXXXXXXX > whatever.tex}
   \input whatever % or something using \openin ...


Taco

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

[Renaud AUBIN]

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\starttext

\input "|ls"

\stoptext

leads to

(/usr/share/texmf-tetex/tex/latex/tools/.tex File ignored)
Runaway argument?
ls"
! Paragraph ended before \next was complete.
<to be read again>
                   \par

???

Taco Hoekwater a écrit :

>Hans Hagen wrote:
>  
>
>>piping: the latest versions of pdftex support this (i\ve forgotten the syntax, but taco who wrote the patch may remember)
>>    
>>
>
>piping syntax:
>
>   \input "|ruby ./myscript.rb \vartest XXXXXXXXX"
>
>the magic trick is the | symbol. With your current tex:
>
>   \writ18{ruby ./myscript.rb \vartest XXXXXXXXX > whatever.tex}
>   \input whatever % or something using \openin ...
>
>
>Taco
>_______________________________________________
>ntg-context mailing list
>ntg-context@ntg.nl
>http://www.ntg.nl/mailman/listinfo/ntg-context
>
>
>  
>


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

[Taco Hoekwater]

Renaud AUBIN wrote:
> \starttext
> 
> \input "|ls"
> 
> \stoptext
> 
> leads to
> 
> (/usr/share/texmf-tetex/tex/latex/tools/.tex File ignored)
> Runaway argument?
> ls"
> ! Paragraph ended before \next was complete.
> <to be read again>
>                    \par
> 
> ???

The pipe symbol has to be non-active (\catcode`\|=12 )

Taco

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

[Renaud AUBIN]

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Taco Hoekwater a écrit :

> The pipe symbol has to be non-active (\catcode`\|=12 )
>
>Taco
>  
>
\starttext

\catcode`\|=12
\input "|ls -l"

\stoptext

! I can't find file `"|ls -l"'.
l.7 \input "|ls -l"

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

[Taco Hoekwater]

Renaud AUBIN wrote:
> \starttext
> 
> \catcode`\|=12
> \input "|ls -l"
> 
> \stoptext
> 
> ! I can't find file `"|ls -l"'.

And all you need now is the latest pdftex -)

   http://sarovar.org/project/showfiles.php?group_id=106&release_id=752

Taco

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

[Renaud AUBIN]

Taco Hoekwater a écrit :

>And all you need now is the latest pdftex -)
>
>   http://sarovar.org/project/showfiles.php?group_id=106&release_id=752
>
>Taco
>  
>
Thanks
Yes, I finally realized that... ;) I'm now on my way to upgrade it...

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

[Renaud AUBIN]

Taco Hoekwater a écrit :

>And all you need now is the latest pdftex -)
>
>   http://sarovar.org/project/showfiles.php?group_id=106&release_id=752
>
>Taco
>  
>
Is it normal that pdfetex.pool is no more built ?

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

[Taco Hoekwater]

Renaud AUBIN wrote:
> Taco Hoekwater a écrit :
> 
> 
>>And all you need now is the latest pdftex -)
>>
>>  http://sarovar.org/project/showfiles.php?group_id=106&release_id=752
>>
>>Taco
>> 
> 
> Is it normal that pdfetex.pool is no more built ?

Yes. There is now only one executable, pdftex. It contains all code
that was previously in pdfetex and the `bare' pdftex is gone.

Taco