Am 05.02.2013 11:07, schrieb David Kastrup:
Jan-Peter Voigt <[email protected]> writes:
Hi Urs,
you can write a music-function that conditionally includes files.
I use a function to include a file, if it exists. The if statement can
of course also test for a option with ly:get-option.
\version "2.16.0"
includeIfExists =
#(define-music-function (parser location file)(string?)
(if (file-exists? file)
(ly:parser-include-string parser (format "\\include \"~A\"\n" file)))
(make-music 'SequentialMusic 'void #t))
Any reason you don't use define-void-function here? Saves the somewhat
weird make-music call and is likely usable in more places.
Thanks for this tip.
Update attached
Now I define a variable for the type of score I have (one- or
multi-system or multi-page) and call the function in the master file, like:
#(define-public score-type "multi-page-example")
\include "layout/output-mode.ily"
If -dexample is present the appropriate stylesheet is loaded according
to score-type, otherwise the default 'a4-standalone' style sheet is used.
Thanks both of you.
Best
Urs
\version "2.16.0"
#(define-public score-type "one-system-example")
includeOutputMode =
#(define-void-function (parser location)()
(cond
((ly:get-option 'example)
(ly:parser-include-string parser
(string-append "\\include \"layout/"
(string-append score-type ".ily\"\n"))))
(else (ly:parser-include-string parser "\\include \"layout/a4-standalone.ily\"\n"))
)
)
\includeOutputMode
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