Warn about missing repeat - Revision history

Lemzwerg at 11:29, 3 December 2025

2025-12-03T11:29:03Z

← Older revision		Revision as of 11:29, 3 December 2025
Line 1:		Line 1:
	When typesetting orchestral pieces, you will not discover if a repeat is missing in one of the parts if you proof read the score, since the repeat will be typeset anyway if it's included in some other parts. The following engraver (generously contributed in https://lists.gnu.org/archive/html/lilypond-user/2025-11/msg00172.html) automatically detects such missing repeats and issues a warning like		When typesetting orchestral pieces, you will not discover if a repeat is missing in one of the parts if you proof read the score, since the repeat will be typeset anyway if it's included in some other parts. The following engraver (generously contributed in https://lists.gnu.org/archive/html/lilypond-user/2025-11/msg00172.html) automatically detects such missing repeats and issues a warning like

	~~<code>~~warning: Global repeat not stated in context #<Context Staff=lower (#<Context Voice () >) ~~></code~~>		warning: Global repeat not stated in context
			#<Context Staff=lower (#<Context Voice () >) >

	The definition of the <code>Repeat_warn_engraver</code> and the lines adding it to the <code>Staff</code> context can preferably be placed in a separate file to be <code>\include</code>d in your music files as part of the proof reading process.		The definition of the <code>Repeat_warn_engraver</code> and the lines adding it to the <code>Staff</code> context can preferably be placed in a separate file to be <code>\include</code>d in your music files as part of the proof reading process.

Lemzwerg at 06:55, 25 November 2025

2025-11-25T06:55:51Z

← Older revision		Revision as of 06:55, 25 November 2025
Line 36:		Line 36:
	\repeat volta 2 { c' c' c' }		\repeat volta 2 { c' c' c' }
	\repeat volta 2 {		\repeat volta 2 {
	d		d'
	}		}
	}		}
Line 43:		Line 43:
	\repeat volta 2 { c' c' c' }		\repeat volta 2 { c' c' c' }
	% \repeat volta 2 { % Typo! Missing repeat, which normally is not detected		% \repeat volta 2 { % Typo! Missing repeat, which normally is not detected
	e		e'
	% }		% }
	}		}

Lemzwerg at 06:55, 25 November 2025

2025-11-25T06:55:13Z

← Older revision		Revision as of 06:55, 25 November 2025
Line 3:		Line 3:
	<code>warning: Global repeat not stated in context #<Context Staff=lower (#<Context Voice () >) ></code>		<code>warning: Global repeat not stated in context #<Context Staff=lower (#<Context Voice () >) ></code>

	The definition of the <code> Repeat_warn_engraver </code> and the lines adding it to the <code> Staff </code> context can preferably be placed in a separate file to be <code>\include</code>:d in your music files as part of the proof reading process.		The definition of the <code>Repeat_warn_engraver</code> and the lines adding it to the <code>Staff</code> context can preferably be placed in a separate file to be <code>\include</code>d in your music files as part of the proof reading process.

	<lilypond version="2.24">		<lilypond version="2.24">
Line 42:		Line 42:
	c'1		c'1
	\repeat volta 2 { c' c' c' }		\repeat volta 2 { c' c' c' }
	% \repeat volta 2 { % Typo! Missing repeat, which normally is not detected.		% \repeat volta 2 { % Typo! Missing repeat, which normally is not detected
	e		e
	% }		% }
Line 48:		Line 48:
	>>		>>
	</lilypond>		</lilypond>

			[[Category:Contexts and engravers]]
			[[Category:Repeats]]
			[[Category:Scheme]]
			[[Category:Snippet]]

Mtsb: Added minor comment in the example

2025-11-24T21:00:54Z

Added minor comment in the example

← Older revision		Revision as of 21:00, 24 November 2025
Line 42:		Line 42:
	c'1		c'1
	\repeat volta 2 { c' c' c' }		\repeat volta 2 { c' c' c' }
	% \repeat volta 2 {		% \repeat volta 2 { % Typo! Missing repeat, which normally is not detected.
	e		e
	% }		% }

Mtsb: Hopefully this works as it should (still trying to learn).

2025-11-24T20:59:11Z

Hopefully this works as it should (still trying to learn).

← Older revision		Revision as of 20:59, 24 November 2025
Line 1:		Line 1:
	When typesetting orchestral pieces, you will not discover if a repeat is missing in one of the parts if you proof read the score, since the repeat will be typeset anyway if it's included in some other parts. The following engraver (generously contributed in https://lists.gnu.org/archive/html/lilypond-user/2025-11/msg00172.html) automatically detects such missing repeats and issues a warning like		When typesetting orchestral pieces, you will not discover if a repeat is missing in one of the parts if you proof read the score, since the repeat will be typeset anyway if it's included in some other parts. The following engraver (generously contributed in https://lists.gnu.org/archive/html/lilypond-user/2025-11/msg00172.html) automatically detects such missing repeats and issues a warning like

	<~~nowiki~~><~~code~~></~~nowiki~~>		<code>warning: Global repeat not stated in context #<Context Staff=lower (#<Context Voice () >) ></code>

	~~warning: Global repeat not stated in context #~~<~~Context~~ Staff~~=lower (#~~<~~Context Voice ()~~ >) >		The definition of the <code> Repeat_warn_engraver </code> and the lines adding it to the <code> Staff </code> context can preferably be placed in a separate file to be <code>\include</code>:d in your music files as part of the proof reading process.

	~~<nowiki></code></nowiki>~~		<lilypond version="2.24">
			#(define Repeat_warn_engraver
	The definition of the <nowiki><code> Repeat_warn_engraver </code></nowiki> and the lines adding it to the <nowiki><code> Staff </code></nowiki> context can preferably be placed in a separate file to be <nowiki><code>\include</code></nowiki>:d in your music files as part of the proof reading process.		(let
			((repeat-start-anywhere? #f)) ; shared across all instances
	~~<nowiki>~~<lilypond version="2.24">~~</nowiki>~~		(lambda (ctx)
			(let ((repeat-start-local? #f)) ; local for one context
	~~<nowiki>~~#~~</nowiki>~~(define Repeat_warn_engraver		(make-engraver
			((start-translation-timestep engraver)
	(let		(set! repeat-start-anywhere? #f))
			(listeners
	((repeat-start-anywhere? #f)) ; shared across all instances		((volta-repeat-start-event engraver event)
			(set! repeat-start-anywhere? #t)
	(lambda (ctx)		(set! repeat-start-local? #t)))
			((stop-translation-timestep engraver)
	(let ((repeat-start-local? #f)) ; local for one context		(if (and repeat-start-anywhere?
			(not repeat-start-local?))
	(make-engraver		(ly:warning "Global repeat not stated in context ~a" ctx))
			(set! repeat-start-local? #f)))))))
	((start-translation-timestep engraver)

	(set! repeat-start-anywhere? #f))

	(listeners

	((volta-repeat-start-event engraver event)

	(set! repeat-start-anywhere? #t)

	(set! repeat-start-local? #t)))

	((stop-translation-timestep engraver)

	(if (and repeat-start-anywhere?

	(not repeat-start-local?))

	(ly:warning "Global repeat not stated in context ~a" ctx))

	(set! repeat-start-local? #f)))))))

	\layout {		\layout {
			\context {
	\context {		\Staff
			\consists #Repeat_warn_engraver
	\Staff		}

	\consists #Repeat_warn_engraver

	}

	}		}

	~~% Example of usage:~~

	<<		<<
			\new Staff = upper {
	\new Staff = upper {		c'1
			\repeat volta 2 { c' c' c' }
	c'1		\repeat volta 2 {
			d
	\repeat volta 2 { c' c' c' }		}
			}
	\repeat volta 2 {		\new Staff = lower {
			c'1
	d		\repeat volta 2 { c' c' c' }
			% \repeat volta 2 {
	}		e
			% }
	}		}

	\new Staff = lower {

	c'1

	\repeat volta 2 { c' c' c' }

	% \repeat volta 2 { ~~% Mistakenly missing repeat in one of the parts~~

	e

	% }

	}

	>>		>>
			</lilypond>
	~~<nowiki>~~</lilypond~~></nowiki~~>

Mtsb: Undo revision 5178 by Mtsb (talk)

2025-11-24T20:46:24Z

Undo revision 5178 by Mtsb (talk)

← Older revision		Revision as of 20:46, 24 November 2025
Line 1:		Line 1:
	When typesetting orchestral pieces, you will not discover if a repeat is missing in one of the parts if you proof read the score, since the repeat will be typeset anyway if it's included in some other parts. The following engraver (generously contributed in https://lists.gnu.org/archive/html/lilypond-user/2025-11/msg00172.html) automatically detects such missing repeats and issues a warning like		When typesetting orchestral pieces, you will not discover if a repeat is missing in one of the parts if you proof read the score, since the repeat will be typeset anyway if it's included in some other parts. The following engraver (generously contributed in https://lists.gnu.org/archive/html/lilypond-user/2025-11/msg00172.html) automatically detects such missing repeats and issues a warning like

			<nowiki><code></nowiki>

			warning: Global repeat not stated in context #<Context Staff=lower (#<Context Voice () >) >

			<nowiki></code></nowiki>

			The definition of the <nowiki><code> Repeat_warn_engraver </code></nowiki> and the lines adding it to the <nowiki><code> Staff </code></nowiki> context can preferably be placed in a separate file to be <nowiki><code>\include</code></nowiki>:d in your music files as part of the proof reading process.

	<nowiki><lilypond version="2.24"></nowiki>		<nowiki><lilypond version="2.24"></nowiki>

Mtsb: Trying to debug the page.

2025-11-24T20:45:37Z

Trying to debug the page.

← Older revision		Revision as of 20:45, 24 November 2025
Line 1:		Line 1:
	When typesetting orchestral pieces, you will not discover if a repeat is missing in one of the parts if you proof read the score, since the repeat will be typeset anyway if it's included in some other parts. The following engraver (generously contributed in https://lists.gnu.org/archive/html/lilypond-user/2025-11/msg00172.html) automatically detects such missing repeats and issues a warning like		When typesetting orchestral pieces, you will not discover if a repeat is missing in one of the parts if you proof read the score, since the repeat will be typeset anyway if it's included in some other parts. The following engraver (generously contributed in https://lists.gnu.org/archive/html/lilypond-user/2025-11/msg00172.html) automatically detects such missing repeats and issues a warning like

	~~<nowiki><code></nowiki>~~

	~~warning: Global repeat not stated in context #<Context Staff=lower (#<Context Voice () >) >~~

	~~<nowiki></code></nowiki>~~

	The definition of the <nowiki><code> Repeat_warn_engraver </code></nowiki> and the lines adding it to the <nowiki><code> Staff </code></nowiki> context can preferably be placed in a separate file to be <nowiki><code>\include</code></nowiki>:d in your music files as part of the proof reading process.

	<nowiki><lilypond version="2.24"></nowiki>		<nowiki><lilypond version="2.24"></nowiki>

Mtsb: New page, with the useful custom engraver by Lukas-Fabian to detect missing repeats

2025-11-24T20:39:38Z

New page, with the useful custom engraver by Lukas-Fabian to detect missing repeats

New page

When typesetting orchestral pieces, you will not discover if a repeat is missing in one of the parts if you proof read the score, since the repeat will be typeset anyway if it's included in some other parts. The following engraver (generously contributed in https://lists.gnu.org/archive/html/lilypond-user/2025-11/msg00172.html) automatically detects such missing repeats and issues a warning like

<nowiki><code></nowiki>

warning: Global repeat not stated in context #<Context Staff=lower (#<Context Voice () >) >

<nowiki></code></nowiki>

The definition of the <nowiki><code> Repeat_warn_engraver </code></nowiki> and the lines adding it to the <nowiki><code> Staff </code></nowiki> context can preferably be placed in a separate file to be <nowiki><code>\include</code></nowiki>:d in your music files as part of the proof reading process.

<nowiki><lilypond version="2.24"></nowiki>

<nowiki>#</nowiki>(define Repeat_warn_engraver

(let

((repeat-start-anywhere? #f)) ; shared across all instances

(lambda (ctx)

(let ((repeat-start-local? #f)) ; local for one context

(make-engraver

((start-translation-timestep engraver)

(set! repeat-start-anywhere? #f))

(listeners

((volta-repeat-start-event engraver event)

(set! repeat-start-anywhere? #t)

(set! repeat-start-local? #t)))

((stop-translation-timestep engraver)

(if (and repeat-start-anywhere?

(not repeat-start-local?))

(ly:warning "Global repeat not stated in context ~a" ctx))

(set! repeat-start-local? #f)))))))

\layout {

\context {

\Staff

\consists #Repeat_warn_engraver

}

}

% Example of usage:

<<

\new Staff = upper {

c'1

\repeat volta 2 { c' c' c' }

\repeat volta 2 {

d

}

}

\new Staff = lower {

c'1

\repeat volta 2 { c' c' c' }

% \repeat volta 2 { % Mistakenly missing repeat in one of the parts

e

% }

}

>>

<nowiki></lilypond></nowiki>