Re: Conditional runs

[Reinhold Kainhofer]

Am Donnerstag, 11. Februar 2010 08:47:42 schrieb Karl Hammar:
> --------
> I try to do conditional lilypond runs. I can do that by having different
> files which includes the common parts, but I'd like to have just one
> source file and specify which version to use (in my case, mostly different
> page sizes). So I'm trying out the #(if (defined ..)) construct.
> 
> 1, what is the rationale for "lilypond -d xx" to be restricted to just
>    a certain list of variables?

If the given flag is not an officially supported one, then lilypond will print 
out a warning, but the flag is still available, albeit not as a toplevel 
function but via ly:get-option:

\version "2.13.0"
#(if (eqv? #t (ly:get-option 'flag))
  (display "\n\tYes!\n")
  (display "\n\tNo!\n")
)

gives you:

address@hidden:~$ lilypond -d flag test.ly
GNU LilyPond 2.13.12
Warnung: keine solche interne Option: flag
»/home/reinhold/test.ly« wird verarbeitet
Analysieren...
        Yes!

Cheers,
Reinhold

-- 
------------------------------------------------------------------
Reinhold Kainhofer, address@hidden, http://reinhold.kainhofer.com/
 * Financial & Actuarial Math., Vienna Univ. of Technology, Austria
 * http://www.fam.tuwien.ac.at/, DVR: 0005886
 * LilyPond, Music typesetting, http://www.lilypond.org