Include only selected systems or pages about lyluatex HOT 5 CLOSED

At least some of this should already be possible using the \betweenLilyPondSystem mechanism described on the lilypond-book pages.

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Indeed. Only now I realize that the system number actually is passed into that function (if it is defined), and one could make that function check against a list somewhere else. The main problem I see is that this is only triggered after each system. So when we ask for anythin not including the first system we can't undo that (AFAICS). In any case it should be easier to completely handle this in teh Lua part.

from lyluatex.

Well, lilypond-book has \preLilyPondExample (and \postLilyPondExample) which one could use to do this like this:

\def\preLilyPondExamples{
    \let\oldincludegraphics\includegraphics
    \renewcommand{\includegraphics}[2][]{\relax}
}
\def\betweenLilyPondSystem#1{
    \ifnum#1<2\else\let\includegraphics\oldincludegraphics\fi
}
\def\postLilyPondExamples{
    \let\preLilyPondExamples\relax
    \let\betweenLilyPondSystem\undefined
    \let\postLilyPondExamples\relax
}

If included just before a particular snippet, this ought to suppress printing of the first system (not tested) and reset things back to normal afterwards.

As best I can tell, the package doesn't currently support those two commands. Would implementing them be sufficient to what you want, or would you want something that would be more user friendly.

from lyluatex.

Maybe that could be wrapped to make it simpler to use, I think.
However, I have the feeling that I would prefer handling it in Lua. But that may solely be based on the fact that I'm still feeling somewhat alien to TeX programming, while Lua (although completely new) is quite familiar based on my knowledge of other languages like Python or JavaScript.

What may be a point for the Lua argument is that it may be easier to make flexible on the long run, and we are dealing with the -systems.tex page anyway.

But I'm far from having a strong opinion here.

from lyluatex.

It will be much easier to to now after the refactor will be merged. Basically it can be done by updating latex.includepdf() and latex.includesystems().

I will add an option print-only that will take effect depending on the value of insert. In systems it affects the systems to be included, in fullpage it filters pages (in inline it won't have an effect).

It will accept:

• a single number
• a range: M-N
• a list: M, N,O

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