Joram:
> could someone explain to me how lilypond-book (esp. the preamble) works?
>
> I read this in ly/lilypond-book-preamble.ly:
>
> several define ...-handler % what is that?
#(define default-toplevel-book-handler
print-book-with-defaults-as-systems )
#(define toplevel-book-handler
(lambda ( . rest)
(set! output-empty-score-list #f)
(apply print-book-with-defaults rest)))
#(define toplevel-music-handler
(lambda ( . rest)
(apply collect-music-for-book rest)))
#(define toplevel-score-handler
(lambda ( . rest)
(apply collect-scores-for-book rest)))
#(define toplevel-text-handler
(lambda ( . rest)
(apply collect-scores-for-book rest)))
Theese:
print-book-with-defaults-as-systems
print-book-with-defaults
collect-music-for-book
collect-scores-for-book
are defined in scm/lily-library.scm, take a look there.
> #(ly:set-option 'backend 'eps) % what if I want svg?
Can't you convert your intermediary eps's or final ps/pdf's to svg ?
Inkscape claims to be able to do that:
https://en.wikipedia.org/wiki/Wikipedia:Graphic_Lab/Resources/PDF_conversion_to_SVG
> #(ly:set-option (quote no-point-and-click)) % ok
> #(define inside-lilypond-book #t) % consequences?
$ find . -type f -print0 | xargs -0 grep 'inside-lilypond-book'
./Documentation/misc/ChangeLog-2.10: inside-lilypond-book
./input/regression/abc2ly/out-test-baseline/share/lilypond/current/ly/lilypond-book-preamble.ly:#(define
inside-lilypond-book #t)
./input/regression/out-test-baseline/share/lilypond/current/ly/lilypond-book-preamble.ly:#(define
inside-lilypond-book #t)
./input/regression/musicxml/out-test-baseline/share/lilypond/current/ly/lilypond-book-preamble.ly:#(define
inside-lilypond-book #t)
./ly/lilypond-book-preamble.ly:#(define inside-lilypond-book #t)
seems to be there for your convenience, i.e. you can check in your
ly/scm code if you are using lilypond-book.
> #(define version-seen #t) % ok, I can omit the version
>
> From the code, I could not find how the cropping, removing of indent,
> removing of the tagline, output as png happens and where the tex, texi
> and count files are produced (I don't need them).
Why don't you include the ly/lilypond-book-preamble.ly verbatim in
some test ly file of yours, like:
\version "2.19.16"
\header {
tagline = ""
}
#(define default-toplevel-book-handler
print-book-with-defaults-as-systems )
#(define toplevel-book-handler
(lambda ( . rest)
(set! output-empty-score-list #f)
(apply print-book-with-defaults rest)))
#(define toplevel-music-handler
(lambda ( . rest)
(apply collect-music-for-book rest)))
#(define toplevel-score-handler
(lambda ( . rest)
(apply collect-scores-for-book rest)))
#(define toplevel-text-handler
(lambda ( . rest)
(apply collect-scores-for-book rest)))
#(set! output-empty-score-list #t)
#(ly:set-option 'backend 'svg)
#(ly:set-option (quote no-point-and-click))
%#(define inside-lilypond-book #t)
%#(define version-seen #t)
\score {
\new Staff { a4 b c d }
}
Doing that I find that scm/framework-svg.scm is missing the
output-classic-framework procedure which the other framework-*.scm
have. Perhaps adding that will solve your problem.
Regards,
/Karl Hammar
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