Hi Bogdan,
I have not yet used it myself but, it seems that this is a typical
situation to be handled with branches in Lyx, no?
One branch for only the questions and another one for questions and
answers? SO, you can selectively compile the branch that interests you.
2012/1/2 Bogdan <bog...@mentalgate.net>
> Actually, I just discovered that the expansion of $$i is put at the end of
> the actual command LyX launches no matter what I use for the converter
> command, e.g. if the converter command is:
>
> pdflatexna $$i 20 20
>
> then LyX is actually executing:
>
> pdflatexna 20 20 sheet.tex
>
> Nasty :)
>
> Bogdan.
>
>
>
> On 02-Jan-12 12:08 am, Bogdan wrote:
>
>> As part of my course, I've been traditionally maintaining a problem
>> sheet in latex and compile two versions, one with answers, and one
>> without. To achieve that, I hide the answers based on whether a certain
>> variable was defined in latex or not and then compile it accordingly:
>>
>> with answers: pdflatex sheet.tex
>> without answers: pdflatex "\def\noanswers{yes}\input{**sheet.tex}"
>>
>> I defined a new converter in LyX do achieve the same but I could not do
>> it without wrapping the 2nd command in a shell script (I'm using
>> windows). What I did:
>>
>> - defined a new file format pdf6: PDF (pdflatex-na) with the same
>> settings as pdf2: PDF (pdflatex).
>> - defined a converter Latex (pdflatex) -> PDF (pdflatex-na) with the
>> following for converter: pdflatex "\def\noanswers{yes}\input{$$**i}"
>>
>> Checking the lyx preferences file, I see it correctly escaped as:
>>
>> \converter "pdflatex" "pdf6" "pdflatex
>> \"\\def\\noanswers{yes}\\**input{$$i}\"" "latex=pdflatex"
>>
>> However, when I try to use it (update or export) then LyX launches the
>> converter and keeps waiting for it to terminate. Investigating the
>> matter with a task manager like Process Hacker or Process Explorer, in
>> order to see what command was actually executed, I notice that LyX
>> started a cmd shell which in fact executed the following:
>>
>> pdflatex "\def\noanswers{yes}\input{ }" sheet.tex
>>
>> Note the empty \input{} and the file name sheet.tex at the end, instead
>> of inside \input{sheet.tex}.
>>
>> I tried with the other variables $$b.tex, $$p, $$r etc, to no avail.
>>
>> Unless I'm missing something, this looks like a bug. Is there a python
>> script anywhere that launches the cmd shell? It's probably there and I
>> could fix it.
>>
>> My workaround is to wrap the whole thing in a cmd script pdflatexna.bat
>> placed in lyx/bin with the contents:
>>
>> @pdflatex "\def\noanswers{yes}\input{%~**1}"
>>
>> (the %~1 instead of %1 is to strip any double quotes)
>>
>> ... and then use the following command for the converter: pdflatexna $$i
>>
>> Cheers,
>> Bogdan.
>>
>>
>>
>
>
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