> 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’