Using \repeat segno for rondo form?

[Mats Bengtsson]

Hi,

I'm slowly starting to get a grip on the \repeat segno features, but I 
need some hints on how to best use it for a ABACA type rondo.

My first attempt was the following, where especially the placement of 
the double wheel (coda) symbol looks weird, since it ends up at the end 
of the first couplet, not at the beginning of the second couplet.

\version "2.24.0"
\fixed c' {
  \repeat segno 3 {
    c2 d | e d | c1 |
    \volta 3 \fine
    \break
    \alternative{
      \volta 1 { f2 f | e1 | \break \section }
      \volta 2 { d2 e | d1 | \section }
    }
  }
}

I could fix that by changing CodaMark.break-visibility, but it feels 
like a feature that should be possible to automate

\fixed c' {
  \repeat segno 3 {
    c2 d | e d | c1 |
    \volta 3 \fine
    \break
    \alternative{
      \volta 1 { f2 f | e1 | \override Score.CodaMark.break-visibility 
= #end-of-line-invisible \break \section }
      \volta 2 { d2 e | d1 | \section }
    }
  }
}

However, in many such pieces, for example in Page 25 of Bärenreiter's 
edition of Rameau's Pièces de clavecin avec une méthode, 
https://imslp.org/wiki/Pi%C3%A8ces_de_clavecin_avec_une_m%C3%A9thode%2C_RCT_2-4_(Rameau%2C_Jean-Philippe), 
the layout is rather something like

\fixed c' {
  c2 d | e d | c1 |
  \fine
  \break
  \sectionLabel "1:e Reprise"
  f2 f | e1 |
  \jump "D.C. al Fine" \section \break
  \sectionLabel "2:e Reprise"
  d2 e | d1 |
  \jump "D.C. al Fine" \section
}

which I haven't been able to typeset using \repeat segno. Also, the 
above example gives a warning that I have music after \fine (I know I 
could turn off such warnings).

If I try to add section labels, as in the following failing example, 
LilyPond complains that these conflict with the coda-mark-event and 
ignores the manual labels.

\fixed c' {
  \repeat segno 3 {
    c2 d | e d | c1 |
    \volta 3 \fine
    \break
    \alternative{
      \volta 1 {
    \sectionLabel "1:e Reprise"
    f2 f | e1 |
    \override Score.CodaMark.break-visibility = #end-of-line-invisible 
\break \section }
      \volta 2 {
    \sectionLabel "2:e Reprise"
    d2 e | d1 | \section }
    }
  }
}

Did I miss something obvious, or doesn't \repeat segno currently support 
such rondo forms in a good way? I have attached a .ly file with all the 
above examples, if anybody wants to play around with them.

   /Mats

segnotest.ly
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