Re: how to set the name of outputfile using a value defined in the source

[Hans Hagen <j.hagen@xs4all.nl>]

On 9/21/2018 10:44 AM, Taco Hoekwater wrote:
> 
> 
>> On 21 Sep 2018, at 10:30, Henri Menke <henrimenke@gmail.com> wrote:
>>
>> On 21/09/18 20:09, J Huisman wrote:
>>> Hi all,
>>>
>>> I'm getting back to using ConTeXt after a couple of years, so I might
>>> be missing something obvious...
>>>
>>> I would like to add an I.D. code to the name of my outputfile, but
>>> since this will be used in an automated environment I would like to
>>> load the ID-code from the source file.
>>>
>>> MWE: test.tex
>>>
>>> \starttext
>>>
>>> \def\idcode{something}
>>>
>>> Some text, whatever.
>>>
>>> \stoptext
>>>
>>> If I typeset with: context text --result=test-idcode the result is
>>> obviously "test-idcode.pdf", but I want to get a file name:
>>> "test-something.pdf"
>>> Is this possible?
>>
>> Once you enter TeX, the output file has been opened.  The very concept
>> of a filesystem forbids you to change the filehandle while writing.  So
>> no, it is not possible easily.
> 
> But it can be done sneakily …
> 
> 
> % start demo
> \enabledirectives[system.callbacks.permitoverloads]
> % previous line allows redefinition of ‘wrapup_run’
> 
> % to keep the code short, I use a direct definition of
> % \idcode and \ctxlua. Nicer would be to store the desired
> % output name in a lua variable and replace the
> % \ctxlua with \startluacode … \stopluacode with
> % a string.format inside it.
> 
> \def\idcode{something}
> 
> \ctxlua{callbacks.register('wrapup_run',  function()
>    os.execute("cp \jobname.pdf doc-\idcode.pdf")
> end)}
> 
> \starttext
> Hello from \idcode
> \stoptext
> % stop demo
In order to prevent future overloads (currently context doesn't itself 
use the wrapup) I've added luatex.wrapup:

\startluacode

     luatex.wrapup(function()
         for i=1,10 do
             print("DONE",i)
         end
     end)

     luatex.wrapup(function()
         for i=1,10 do
             print("MORE",i)
         end
     end)

\stopluacode

\starttext

test

\stoptext

no beta yet

Hans
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                                           Hans Hagen | PRAGMA ADE
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