Re: Combine "\once \override" combinations

[Stu McKenzie via LilyPond User List]

On 2025-07-18 00:20, Thomas Morley wrote:
Am Fr., 18. Juli 2025 um 06:39 Uhr schrieb Stu McKenzie via LilyPond
User List<swwlilyu...@stoozsoftware.com>:
On 2025-07-17 07:50, Magnus Svenson wrote:

Music = {
  b'1
  \break % to show colored bar line
  \ColorRepeatBegSpecialBar
  \repeat volta 2 {
   c''1 |

  \alternative {
   \volta 1 {
    d''1 |
    \ColorRepeatEndSpecialBar
   }

   \volta 2 {
    e''1 |
   }
  }
  }
}

Thank you Magnus, for your reply.  Your new structure certainly clears all of 
the warnings.

I removed the "\break" before the color change and it proved your theory that 
"lilypond considers them to be the same barline" is correct.

I read somewhere that any repeat should start on a new line if possible, so I would like 
to ask others if this feature could be changed by specifying that a bar line before a 
"\break" can somehow be left in the default color.

For anyone interested, the full MWE is now:

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

\version "2.24.0"

ColorRepeatBegSpecialBar = {
  \once \override Score.BarLine.color = #(x11-color 'orange)
  \once \set Score.startRepeatBarType = #"[|:"
}
ColorRepeatEndSpecialBar = {
  \once \override Score.BarLine.color = #(x11-color 'orange)
  \once \set Score.endRepeatBarType = #":|]"
}

Music = {
  b'1
  \break % to show colored bar line
  \ColorRepeatBegSpecialBar
  \repeat volta 2 {
   c''1 |
   \alternative {
    \volta 1 {
     d''1 |
     \ColorRepeatEndSpecialBar
    } % END volta 1
    \volta 2 {
     e''1 |
    } % END volta 2
   }  % END alternative
  } % END repeat volta 2
} % END Music

\score {
   \new Staff { \Music }
}

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

Have a look athttps://lsr.di.unimi.it/LSR/Item?id=775
Does it help?

Cheers,
   Harm

Thanks for the feedback, Thomas.
I've been trying to use some of the Scheme code from that LSR, but 
haven't found a solution yet.
I'll keep trying and let others know if I come up with a solution.