Re: [NTG-context] Extract only certain part of document (via modes)?

6 Nov 2016


      On Sun, Nov 6, 2016 at 3:03 PM, Wolfgang Schuster
 wrote:
...
Mikael P. Sundqvist
6. November 2016 um 12:51
Dear list, and in particular Hans,
I asked the same question on stackexchange before today
(http://tex.stackexchange.com/q/337738/52406), and got the answer that
what I want to do might not be possible.
In my large document I have exercises (typeset with \startexercise
\stopexercise, defined as an enumeration). Is it possible to use modes
(or any other trick) to be able to compile the same file and get only
the exercises. For example,
context file.tex
should give the full document, while
context --mode=exercises file.tex
should give only all the exercises (or just everything "in one mode")?
You can put each exercise in a block and ask Hans to add a \saveblocks
commands
which writes the content of all exercise blocks to a external file (like
\savebuffer lets
you save the content of a buffer in a external file).
\defineblock[exercise]
\keepblocks [exercise]
\defineenumeration[exercise][text=Exercise]
%\doifmode{exercises}{\saveblocks[exercise][exercises.tex]}
\starttext
\beginexercise
    \startexercise
        This is the first exercise.
    \stopexercise
\endexercise
\beginexercise
    \startexercise
        This is the second exercise.
    \stopexercise
\endexercise
\stoptext
The content of this saved file can then be read by another file
to get a document which contains only the exercises.
\defineenumeration[exercise][text=Exercise]
\starttext
\doiffileelse{exercise}
  {\input{exercises}}
  {{\tttf Exercise file doesn’t exist.}}
\stoptext
Wolfgang
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Thank you for the answer, I think that would be nice to have. Hans, do
you mind adding such a feature? Or do you have any other idea on the
problem as is?

/Mikael