Re: Change to \rest markup in 2.23

[Thomas Morley]

Am Mi., 20. Juli 2022 um 05:58 Uhr schrieb David F. <davidf@gmx.us>:
>
> In 2.23, the rest markup command changed from taking a string to taking a 
> duration.
>
> \version "2.22"
> \markup \rest #"4.."
>
> \version "2.23"
> \markup \rest { 4.. }
>
> It would be nice if this change were backward compatible, at least for a 
> version or two.
>
> My primary Lilypond environment is v2.22.2-1 on macOS 10.14.  This is the 
> environment I use for final “production” of scores.  But I’ve been trying to 
> do as much development as possible in v2.23 on macOS 10.15.
>
> Unfortunately, the change to the rest markup command makes going back and 
> forth quite cumbersome.  Would be be possible to make this command take 
> either a string or duration?
>
> David F.
>
>

Well, going back and forth between 2.22.2 and new devel-version only
works if you don't use devel-features and don't hit internal changes.

That said, below a coding which makes \rest always take a duration,
transforming it to a string for 2.22.
Once you settled with 2.23. simply delete it.
Disclaimer: it's all a bit clumsy, cheeky and not tested in the wild.

\version "2.20.0"

#(begin
  (define default-make-rest-markup make-rest-markup)
  (define-markup-command (rest layout props duration) (ly:duration?)
    (let ((version-arg
            (if (string<? "22" (second (string-split (lilypond-version) #\.)))
                duration
                (ly:duration->string duration))))
    (interpret-markup layout props
      (default-make-rest-markup version-arg)))))

\markup \rest { 4.. }

Cheers,
  Harm