Hi,
I would like LilyPond to insert a style file depending on the presence
of a command line switch.
Inserting the following into "init.ly"
#(if (ly:get-option 'draft-mode)
(ly:parser-include-string parser "\\include \"draft-mode.ily\""))
works when I add the option to the command line
lilypond -ddraft-mode file.ly
However I want to also be able to process options that have been
included in the input file.
Concretely the thought "draft-mode.ily" file will itself check for the
presence of further command line options.
What I would like to write is a file like
\version "2.17.26"
#(ly:set-option 'draft-color-editorial)
...
and have "draft-mode.ily" check for this option
so that the relevant style sheet will include the relevant style sheet,
but only if -ddraft-mode is set.
But it doesn't work, options set in the input file aren't respected.
So obviously LilyPond hasn't parsed the input file when the check is
performed from within "init.ly".
So my question is: What would be the appropriate point to insert such a
check?
It should already see options set by ly:set-option commands but it
should occur before any engraving has started.
Thanks for any hints
Urs
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