Re: Is it possible to get lilypond to generate a lilypond source file?

[Han-Wen Nienhuys]

Cameron Horsburgh wrote:
> I suggested something similar (my original message isn't there, but it's
> referenced at
> http://lists.gnu.org/archive/html/lilypond-devel/2005-07/msg00224.html
> ) Graham Percival had a few suggestions which are useful
>
> However, having a standalone Lilypond preprocessor could be useful for a
> number of reasons. Would there be any interest in sponsoring this as a
> feature? Han-Wen -- how much would it cost?

Of course!

It's possible to parse ly code coming from a string, which you can use 
to do do 1) and 2)  below, by overriding toplevel-music-handler to call 
displayLilyMusic, you could achieve 3) and 4) -- then, music at toplevel 
will not be printed as PS, but passed through displayMusic, which would 
write it to a file.

Is that what you're after? I can cook up an example for you. Does EUR 50 
sound as fair price to you?

> > A partial solution is to forget about guile, use \displayLilyMusic and
> > pipe lily's stdout to a file. However lily insists on creating .ps
> > and .pdf files, which I don't neccessarily want it to do. I'll look at
> > the implementation of \displayLilyMusic to see if I get any ideas.

> > > I think it ought to be possible to write a .ly file containing guile
> > > code that makes lilypond do the following:
> > >
> > >         1) Read another .ly file
> > >         2) parse that file
> > >         3) convert the resulting music to .ly source code
> > >         4) write this code to a third .ly file


--
 Han-Wen Nienhuys - address@hidden - http://www.xs4all.nl/~hanwen