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## Re: lilypond-book macros/variables

 From: Mats Bengtsson Subject: Re: lilypond-book macros/variables Date: Wed, 29 Aug 2007 12:54:49 +0200 User-agent: Thunderbird 2.0.0.5 (X11/20070716)

In any text editor, it's trivial to automatically replace all occurences of
something like
\lilystart
by
\begin[staffsize=12]{lilypond}
\include "bookstyle.ly <http://bookstyle.ly>"
or whatever, so I have personally not seen any need for this feature.
Of course it's very clever to do what you did, namely to include a
separate .ly file that contains all the necessary settings.


If you have a large number of short snippets, I see that your solution might be
convenient. Did you consider using a standard preprocessor like CPP or M4

(search the mailing list archives for "preprocessor" for some related discussions
on the use of preprocessors in pure .ly files)?

/Mats



hello lilyponders,

I've been using lilypond-book for the first time. love it!


There's one thing that I'd like to have though. I'd love to be able to define macros in a similar way as in latex. Is this possible?


From what I've read in the documentation, lilypond-book only knows to look for \begin{lilypond} and \lilypond{ }, so no macros can be defined *for lilypond-book* inside the latex file. If you try to do this, lilypond-book ignores them and then latex tries to interpret them and fails.


So i wrote a little parser that looks for a lilypond delimiter, specifically \lily{ [music] } and replaces that for whatever i define in my parser, for example

\begin[staffsize=12]{lilypond}
\include "bookstyle.ly <http://bookstyle.ly>"
[music]
\end{lilypond}

Now compiling a lilypond-book becomes a three step process:

1. parse book.tex to find \lily{ } and replace with arbitrary lilypond stuff
2. run lilypond-book on book.tex
3. run latex on book.tex


So if there is no way of doing this in lilypond-book, would anyone else be interested in integrating something like this in the core lilypond-book code? would it be useful for others?

best,

victor

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--
=============================================
Mats Bengtsson
Signal Processing
Signals, Sensors and Systems
Royal Institute of Technology
SE-100 44  STOCKHOLM
Sweden
Phone: (+46) 8 790 8463
Fax:   (+46) 8 790 7260