I ran into an issue with the edition-engraver, targeting individual
scores when multiple scores are compiled within a bookpart.
It's actually within the 'page-layout' or rather the 'breaks'
openLilyLib package, and I can imagine that my issue is related to
another one that was raised recently (that either of these packages
didn't work well with independent edition-engraver targets).
The 'breaks' package
(https://github.com/openlilylib/breaks/blob/master/package.ily) installs
itself like this:
% Install editionID
\layout {
\context {
\Score
\editionID ##f breaks
}
}
which can later (e.g. in the page-layout.conditional-breaks package:
https://github.com/openlilylib/page-layout/blob/master/conditional-breaks/module.ily#L113)
be addressed with (for example)
% insert invisible barlines to enable breaks within measures
\editionModList conditional-breaks breaks.Score.A
\bar "" #in-measure-breaks
This works perfectly - as long as there is only one score to be
compiled. However, if more than one score is compiled (at least in the
same bookpart) it seems that all the mods for all scores are merged
together, with the result that in each score all the line breaks for all
scores are applied.
Am I understanding it right that I would have to use \editionID in a
layout block that only affects an individual score, giving them
individual names?
And how could I do that if I don't have a literal \score {} block but
generate the scores like the following
(https://git.openlilylib.org/bfsc/kayser/blob/techdoc/includes/lib/engrave.ily#L163)
(ly:book-process
workgroup-book ; a \book {} object
#{ \paper {} #} ; non-functional, placeholder
$defaultlayout ;; merged from all layout definitions
(get-output-name))))
where 'workgroup-book' is a \book to which multiple bookparts are added with
(ly:book-add-bookpart! workgroup-book
(ly:make-book-part
(let ((movements (get-movement-list work-path)))
(reverse
(append-map
list
(map (lambda (mvt)
(list (makeMovementTitle (append work-path (list mvt)))))
movements)
(map (lambda (mvt)
(make-score (append work-path (list mvt))))
movements))))))
where a list of alternating title markups and scores are added to the
bookpart, and the scores are created with (at its core)
(ly:make-score
(make-music 'SimultaneousMusic 'elements
(filter
(lambda (l) (not (null? l)))
(map (lambda (elt) (staff elt)) elements))))
So IIUC it boils down to the question: how can I apply \editionID (or
some equivalent code) to a score that is created with ly:make-score. As
far as I have seen ly:make-score will only accept the music expression
and not the \layout {} or \midi {} blocks I can nest within a \score {}
written in LilyPond language.
And: if I manage to "install" an edition ID within that expression, is
it true that I can later address this score specifically?
Thanks for any hints or explanations
Urs
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