use lilypond 2.27 and be compatibel to 2.26

* introduce \songsChapter and \markuppage
* have nested chapters in PDF toc

.gitignore

@@ -1,8 +1,8 @@
 # ---> Lilypond
 *.pdf
+*.cho
 *.ps
 *.midi
 *.mid
 *.log
 *~
-

all_base_includes.ly

@@ -1,26 +0,0 @@
-#(define noStandaloneOutput (if (defined? 'noStandaloneOutput) noStandaloneOutput #f))
-
-#(if (defined? 'LAYOUT) #f
-  (let ((scmdir (string-append (dirname (current-filename)) file-name-separator-string "scm" file-name-separator-string)))
-    (load (string-append scmdir "json_parser.scm"))
-    (load (string-append scmdir "resolve_inherits.scm"))
-    (load (string-append scmdir "yaml_parser.scm"))))
-\include "basic_format_and_style_settings.ly"
-\include "eps_file_from_song_dir.ly"
-\include "title_with_category_images.ly"
-\include "chord_settings.ly"
-\include "transposition.ly"
-\include "verses_with_chords.ly"
-\include "arrows_in_scores.ly"
-\include "swing_style.ly"
-\include "inline_score.ly"
-
-% reset important variables
-LAYOUT = \layout { \generalLayout }
-HEADER = {}
-MUSIC = {}
-TEXT = \markuplist {""}
-
-verseChords = {}
-firstVoice = {}
-global = {}

basic_format_and_style_settings.ly

@@ -1,177 +0,0 @@
-\language "deutsch"
-
-\include "default_style.ly"
-\include "default_songinfo_style.ly"
-\include "footer_with_songinfo.ly"
-
-\include #(if (defined? 'customStyleOverridesFile) customStyleOverridesFile "void.ly")
-
-#(set-default-paper-size songFormatAndSize)
-#(set-global-staff-size globalSize)
-
-\paper {
-  property-defaults.fonts.serif = \songChordFont
-  property-defaults.fonts.sans = \songLyricFont
-  %annotate-spacing = ##t
-  % spacing stuff
-  two-sided = ##t
-  inner-margin = 1.5\cm
-  outer-margin = \songMargin
-  binding-offset = 0\cm
-  top-margin = \songMargin
-  bottom-margin = \songMargin
-  system-system-spacing = #'((basic-distance . 10) (padding . 1.5))
-  markup-system-spacing = #'((basic-distance . 1))
-  score-markup-spacing = #'((padding . 2))
-  top-markup-spacing = #'((basic-distance . 0) (minimum-distance . 0) (padding . 0))
-}
-
-generalLayout = \layout {
-  indent = #0
-  \context {
-    \Lyrics
-    \override LyricText.font-size = #lyricSize
-    \override StanzaNumber.font-size = #lyricSize
-    \override StanzaNumber.font-family = #'sans
-    \override LyricText.font-family = #'sans
-    \override LyricExtender.minimum-length = 0
-  }
-  \context {
-    \Staff
-    \accidentalStyle modern
-    \consists Merge_rests_engraver
-  }
-  \context {
-    \Score
-    \remove "Bar_number_engraver"
-    \RemoveEmptyStaves
-    \override VerticalAxisGroup.remove-first = ##t
-    \overrideTimeSignatureSettings
-      4/4               % timeSignatureFraction
-      1/4               % baseMomentFraction
-      #'(1 1 1 1)       % beatStructure
-      #'()		% beamExceptions
-    \overrideTimeSignatureSettings
-      3/4               % timeSignatureFraction
-      1/4               % baseMomentFraction
-      #'(1 1 1 1)       % beatStructure
-      #'()		% beamExceptions
-  }
-  \context {
-    \Voice
-    % ich will lines breaken wie ich will!
-    \remove "Forbid_line_break_engraver"
-    \override NoteHead.layer = 2
-    \override Dots.layer = 2
-    \override Stem.layer = 2
-    \override Flag.layer = 2
-    \override Beam.layer = 2
-  }
-}
-
-%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-%%% kleine Helferlein:
-
-textp = \lyricmode { \markup { \raise #1 \musicglyph #"rests.3" } }
-
-% zweite Stimme alles grau
-secondVoiceStyle = {
-  \override NoteHead.color = #grey
-  \override Dots.color = #grey
-  \override Stem.color = #grey
-  \override Flag.color = #grey
-  \override Beam.color = #grey
-  \override NoteHead.layer = 1
-  \override Dots.layer = 1
-  \override Stem.layer = 1
-  \override Flag.layer = 1
-  \override Beam.layer = 1
-}
-
-firstVoiceStyle = {
-  \override NoteHead.color = #black
-  \override Dots.color = #black
-  \override Stem.color = #black
-  \override Flag.color = #black
-  \override Beam.color = #black
-}
-
-% Deprecated: einzelne Noten innerhalb von \secondVoiceStyle mit schwarzem statt grauem Kopf
-schwarzkopf =
-  #(define-music-function (parser location noten) (ly:music?)
-    (begin (ly:warning "\\schwarzkopf brauchts nicht mehr, das kann ersatzlos weg!") noten))
-
-romanStanza =
-  #(define-music-function (parser location) ()
-  #{ \override StanzaNumber.style = #'roman #})
-
-override-stanza =
-#(define-music-function (parser location stanzanumber) (number?)
-#{
-  \once \override StanzaNumber.forced-spacing = #stanzanumber % misuse property "forced-spacing" to override the stanzanumber
-#}
-)
-
-stanza =
-#(define-music-function (parser location stanzanumber) (number?)
-#{
-  \once \override StanzaNumber.layer = 23 % set this to signal that there is a real stanza and no repeat signs
-  \applyContext
-  #(lambda (context)
-    (let* ((stanzanumber (ly:assoc-get 'forced-spacing (ly:context-grob-definition context 'StanzaNumber) stanzanumber))
-           (stanzastyle (ly:assoc-get 'style (ly:context-grob-definition context 'StanzaNumber)))
-           (formattedStanzaNumber (format #f (if (eq? stanzastyle 'roman) romanStanzaFormat stanzaFormat) stanzanumber)))
-        (ly:context-set-property! context 'stanza formattedStanzaNumber)))
-#}
-)
-
-ref = {
-  \once \override StanzaNumber.layer = 23 % set this to signal that there is a real stanza and no repeat signs
-  \set stanza = \refString
-}
-
-% prints a repStart Sign as stanza if the tag 'repeats is kept.
-% if there was a stanza already set by the stanza function with StanzaNumber.layer = 23 we set that also as stanza.
-repStartWithTag = \lyricmode {
-  \tag #'repeats {
-    \applyContext
-    #(lambda (context)
-      (let ((lastStanza (ly:context-property context 'stanza))
-            (printLastStanza (= (ly:assoc-get 'layer (ly:context-grob-definition context 'StanzaNumber) 0) 23))
-            (stanzaFontSeries (ly:assoc-get 'font-series (ly:context-grob-definition context 'StanzaNumber) 'normal)))
-      (ly:context-set-property! context 'stanza
-        (make-concat-markup
-          (if printLastStanza
-            (list (make-override-markup `(font-series . ,stanzaFontSeries) lastStanza) (make-hspace-markup 1) repStart)
-            (list repStart)
-            )))))
-    \once \override StanzaNumber.font-series = #'normal
-  }
-}
-
-repStopWithTag = \lyricmode {
-  \tag #'repeats {
-    \once \override StanzaNumber.font-series = #'normal
-    \once \override StanzaNumber.direction = 1
-    \set stanza = \markup { \repStop }
-  }
-}
-
-rightHyphen = \lyricmode {
-  \once \override StanzaNumber.font-series = #'normal
-  \once \override StanzaNumber.direction = 1
-  \set stanza = "-"
-}
-
-leftHyphen = \lyricmode {
-  \once \override StanzaNumber.font-series = #'normal
-  \set stanza = "-"
-}
-
-multiVerseSkips =
-#(define-music-function (parser location skips) (number?)
-  #{ \tag #'multiVerse { \repeat unfold #skips { \skip4 } } #})
-
-alt =
-#(define-music-function (parser location a b) (ly:music? ly:music?)
-  #{ \tag #'firstVerse { #a } \tag #'multiVerse { #b } #})

default_songinfo_style.ly

@@ -1,62 +0,0 @@
-\paper {
-  poetPrefix = "Worte:"
-  composerPrefix = "Weise:"
-  compositionPrefix = "Satz:"
-  poetAndComposerEqualPrefix = "Worte und Weise:"
-  voicePrefix = "Stimme:"
-  versePrefix = "Strophe:"
-  translationPrefix = "Übersetzung:"
-  interludePrefix = "Zwischenspiel:"
-  bridgePrefix = "Bridge:"
-
-  authorFormat =
-    #(lambda (noDetails name trail_name birth_year death_year organization)
-        (let ((string-present (lambda (str) (and str (not (and (string? str) (string-null? str))))))
-              (render_informations (lambda (infolist) (string-append (car infolist) (if (or noDetails (null? (cdr infolist))) "" (string-append " (" (string-join (cdr infolist) ", ") ")"))))))
-            (if (or (string-present trail_name) (string-present name))
-              (render_informations (filter string-present (list
-                trail_name
-                name
-                (if (and (string-present birth_year) (string-present death_year))
-                  (ly:format "~a‒~a" birth_year death_year)
-                  (if (string-present birth_year)
-                    (ly:format "*~a" birth_year)
-                    (if (string-present death_year) (ly:format "†~a" death_year) "")))
-                organization
-              )))
-              ""
-          )))
-
-  songinfoMarkup =
-    #(make-on-the-fly-markup
-      (lambda (layout props m)
-        (let* ((between-poet-and-composer-markup (chain-assoc-get 'header:between-poet-and-composer-markup props (make-hspace-markup 3)))
-              (poet-maybe-with-composer (chain-assoc-get 'songinfo:poet-maybe-with-composer props #f))
-              (composer (chain-assoc-get 'songinfo:composer props #f))
-              (copyright (chain-assoc-get 'songinfo:copyright props #f))
-              (infotext (chain-assoc-get 'songinfo:infotext props #f))
-              (translation (chain-assoc-get 'songinfo:translation props #f))
-              (pronunciation (chain-assoc-get 'songinfo:pronunciation props #f))
-              (year_text (chain-assoc-get 'songinfo:year_text props #f))
-              (year_melody (chain-assoc-get 'songinfo:year_melody props #f))
-              (poet-with-year (if (and poet-maybe-with-composer year_text) (string-append poet-maybe-with-composer ", " year_text) poet-maybe-with-composer))
-              (composer-with-year (if (and composer year_melody) (string-append composer ", " year_melody) composer))
-              (poet-and-composer-oneliner (if (and poet-with-year composer-with-year) (markup poet-with-year between-poet-and-composer-markup composer-with-year) #f))
-              (current-line-width (chain-assoc-get 'line-width props (ly:output-def-lookup layout 'line-width))))
-          (stack-lines DOWN 0.0 (chain-assoc-get 'baseline-skip props)
-            (interpret-markup-list layout props
-              (append
-                (if (and poet-and-composer-oneliner (< (interval-length (ly:stencil-extent (interpret-markup layout props poet-and-composer-oneliner) X)) current-line-width))
-                  (list poet-and-composer-oneliner)
-                  (make-wordwrap-string-internal-markup-list #t (string-append
-                    (if poet-with-year (string-append "\n\n" poet-with-year) "")
-                    (if composer-with-year (string-append "\n\n" composer-with-year) "")
-                  )))
-                (make-wordwrap-string-internal-markup-list #t (string-append
-                  (if copyright (string-append "\n\n© " copyright) "")
-                  (if infotext (string-append "\n\n" infotext) "")
-                  (if translation (string-append "\n\nÜbersetzung: " translation) "")
-                  (if pronunciation (string-append "\n\nAussprache: " pronunciation) ""))))))))
-      (make-null-markup)
-    )
-}

default_style.ly

@@ -1,23 +0,0 @@
-songFormatAndSize = "a5"
-songMargin = 5
-songInfoFontSize = 0
-songInfoLineWidthFraction = 0.9
-songTitleSize = 6
-songTitleFont = "LilyPond Sans"
-songChordFont = "LilyPond Sans"
-songLyricFont = "LilyPond Sans"
-songChordFontSeries = #'bold
-songTextChordAlignment = #'left
-songScoreChordFontSize = 2
-songTextChordFontSize = \songScoreChordFontSize
-songTextChordDistance = 2.8
-songTextLineHeigth = 5.8
-songTocColumns = 3
-globalSize = 15
-lyricSize = 1.6
-stanzaFormat = "~a."
-romanStanzaFormat = "~@r."
-refString = "Ref.:"
-% hübsche Wiederholungszeichen für den Liedtext
-repStart = "𝄆"
-repStop = "𝄇"

eps_file_from_song_dir.ly

@@ -1,18 +0,0 @@
-% songfilename auch im Markup verfügbar machen
-#(define-markup-list-command (setsongfilename layout props songfilename markuplist)
-  (string? markup-list?)
-  (interpret-markup-list layout (prepend-alist-chain 'songfilename songfilename props) markuplist))
-
-#(define-markup-command (customEps layout props ysize filename)(number? string?)
-   #:properties ((songfilename "")
-                 (defaultmarkup #f))
-   (interpret-markup layout props
-     (let ((filepath (if (string-null? songfilename)
-                          filename
-                          (ly:format "~a/~a/~a" songPath songfilename filename))))
-       (if (file-exists? filepath)
-             (make-epsfile-markup Y ysize filepath)
-             (if defaultmarkup
-                 defaultmarkup
-                 (ly:format "file does not exist ~a" filepath))
-))))

private_includes/base/all.ily

@@ -0,0 +1,65 @@
+#(define include_dir_not_added? (if (defined? 'include_dir_not_added?) include_dir_not_added? #t))
+#(if include_dir_not_added?
+   (let* ((common-include-dir (dirname (dirname (dirname (current-filename))))))
+      (ly:parser-append-to-include-path common-include-dir)
+      (set! include_dir_not_added? #f)))
+
+#(define noStandaloneOutput (if (defined? 'noStandaloneOutput) noStandaloneOutput #f))
+
+#(define windows? (string-prefix-ci? "windows" (utsname:sysname (uname))))
+
+#(if (defined? 'LAYOUT) #f
+  (let ((scm-load (lambda (filename) (load (
+    string-append
+      ; on windows the detection of absolute pathes is broken (cause they start with a drive letter and not with a /)
+      ; so we have to use relative pathes for load. That works in frescobaldi, but not if you call lilypond from command line,
+      ; with a relative path to the .ly file, so we use absolute pathes on posix systems, where it works.
+      (if windows?
+        ""
+        (string-append (dirname (current-filename)) file-name-separator-string))
+      "scm" file-name-separator-string filename
+    )))))
+    (scm-load "resolve_inherits.scm")
+    (scm-load "yaml_parser.scm")))
+
+#(define (song-includes-data-path filename)
+  (string-join
+    (list
+      (dirname (dirname (dirname (dirname (current-filename)))))
+      "lilypond-song-includes"
+      "data"
+      filename)
+    file-name-separator-string))
+#(define AUTHOR_DATA (if (defined? 'AUTHOR_DATA) AUTHOR_DATA (parse-yml-file (song-includes-data-path "authors.yml"))))
+#(define SONG_DATA (if (defined? 'SONG_DATA) SONG_DATA (parse-yml-file (song-includes-data-path "songs.yml"))))
+
+\include #(if (ly:version? < '(2 27 0)) "compat_lilypond_2_26.ily" "../void.ily")
+\include "merge_rests_engraver_override.ily"
+\include "basic_format_and_style_settings.ily"
+\include "eps_file_from_song_dir.ily"
+\include "embedded_songs.ily"
+\include "title_with_category_images.ily"
+\include "chord_settings.ily"
+\include "chordpro.ily"
+\include "transposition.ily"
+\include "markup_tag_groups_hack.ily"
+\include "verses_with_chords.ily"
+\include "arrows_in_scores.ily"
+\include "swing_style.ily"
+\include "inline_score.ily"
+\include "custom_indentation.ily"
+\include "include_from_song.ily"
+
+% reset important variables
+LAYOUT = \layout { \generalLayout }
+HEADER = {}
+MUSIC = {}
+TEXT = \markuplist {}
+TEXT_PAGES = #f
+EMBEDDED_SONGS = #'()
+
+verseChords = {}
+firstVoice = {}
+global = {}
+
+\resetTagGroups

private_includes/base/basic_format_and_style_settings.ily

@@ -0,0 +1,365 @@
+\language "deutsch"
+
+\include "default_style.ily"
+\include "default_songinfo_style.ily"
+\include "footer_with_songinfo.ily"
+
+\include #(if (defined? 'customStyleOverridesFile) customStyleOverridesFile "../void.ily")
+
+#(set-default-paper-size songFormatAndSize)
+#(set-global-staff-size globalSize)
+
+\paper {
+  property-defaults.fonts.serif = \songChordFont
+  property-defaults.fonts.sans = \songLyricFont
+  %annotate-spacing = ##t
+  % spacing stuff
+  two-sided = ##t
+  inner-margin = 1.5\cm
+  outer-margin = \songMargin
+  binding-offset = 0\cm
+  top-margin = \songMargin
+  bottom-margin = \songMargin
+  system-system-spacing = #'((basic-distance . 10) (padding . 1.5))
+  markup-system-spacing = #'((basic-distance . 1))
+  score-markup-spacing = #'((padding . 2))
+  top-markup-spacing = #'((basic-distance . 0) (minimum-distance . 0) (padding . 0))
+  refMarkupFormatter = #(lambda (layout props stanzanumbers)
+    (interpret-markup layout props
+    (if (null? stanzanumbers)
+        refString
+        (ly:format refStringWithNumbers (string-join (map (lambda (stanzanumber) (ly:format "~a" stanzanumber)) stanzanumbers) ", ")))))
+  bridgeMarkupFormatter = #(lambda (layout props stanzanumbers)
+    (interpret-markup layout props
+    (if (null? stanzanumbers)
+        bridgeString
+        (ly:format bridgeStringWithNumbers (string-join (map (lambda (stanzanumber) (ly:format "~a" stanzanumber)) stanzanumbers) ", ")))))
+}
+
+generalLayout = \layout {
+  indent = #0
+  \context {
+    \Lyrics
+    \override LyricText.font-size = #lyricSize
+    \override StanzaNumber.font-size = #lyricSize
+    \override StanzaNumber.font-family = #'sans
+    \override LyricText.font-family = #'sans
+    \override LyricExtender.minimum-length = 0
+  }
+  \context {
+    \Staff
+    \accidentalStyle modern-voice-cautionary
+    \consists \Better_Merge_rests_engraver
+  }
+  \context {
+    \Score
+    \remove "Bar_number_engraver"
+    \remove "Metronome_mark_engraver"
+    \RemoveEmptyStaves
+    \override VerticalAxisGroup.remove-first = ##t
+    \numericTimeSignature
+    rehearsalMarkFormatter = #format-mark-box-alphabet
+    \overrideTimeSignatureSettings
+      4/4               % timeSignatureFraction
+      1/4               % baseMomentFraction
+      #'(1 1 1 1)       % beatStructure
+      #'()		% beamExceptions
+    \overrideTimeSignatureSettings
+      3/4               % timeSignatureFraction
+      1/4               % baseMomentFraction
+      #'(1 1 1 1)       % beatStructure
+      #'()		% beamExceptions
+  }
+  \context {
+    \Voice
+    % ich will lines breaken wie ich will!
+    \remove "Forbid_line_break_engraver"
+    \override NoteHead.layer = 2
+    \override Rest.layer = 2
+    \override Dots.layer = 2
+    \override Stem.layer = 2
+    \override Flag.layer = 2
+    \override Beam.layer = 2
+    \override Slur.layer = 2
+    \override Tie.layer = 2
+    \override Accidental.layer = 2
+  }
+}
+
+#(define (customized-layout base-layout)
+   (let
+     ((custom-size (ly:output-def-lookup base-layout 'size #f)))
+     (if custom-size (layout-set-staff-size custom-size))))
+
+% Scores in Markups (z.B. inline-score) kopieren ihr \layout schon beim Parsen,
+% also bevor customized-layout greift. Deshalb nachträglich anpassen.
+#(define (customize-embedded-score-layouts! obj)
+   (cond
+     ((ly:score? obj)
+      (for-each
+        (lambda (def)
+          (let ((custom-size (ly:output-def-lookup def 'size #f))
+                (scope (ly:output-def-scope def)))
+            (if custom-size
+              (layout-set-absolute-staff-size-in-module scope (* custom-size (eval 'pt scope))))))
+        (ly:score-output-defs obj)))
+     ((pair? obj)
+      (customize-embedded-score-layouts! (car obj))
+      (customize-embedded-score-layouts! (cdr obj)))))
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%%% kleine Helferlein:
+
+textp = \lyricmode { \markup { \raise #1 \musicglyph #"rests.3" } }
+
+% zweite Stimme alles grau
+secondVoiceStyle = {
+  \override NoteHead.color = #grey
+  \override Rest.color = #grey
+  \override Dots.color = #grey
+  \override Stem.color = #grey
+  \override Flag.color = #grey
+  \override Beam.color = #grey
+  \override Slur.color = #grey
+  \override Tie.color = #grey
+  \override Accidental.color = #grey
+  \override NoteHead.layer = 1
+  \override Rest.layer = 1
+  \override Dots.layer = 1
+  \override Stem.layer = 1
+  \override Flag.layer = 1
+  \override Beam.layer = 1
+  \override Slur.layer = 1
+  \override Tie.layer = 1
+  \override Accidental.layer = 1
+}
+
+firstVoiceStyle = {
+  \override NoteHead.color = #black
+  \override Rest.color = #black
+  \override Dots.color = #black
+  \override Stem.color = #black
+  \override Flag.color = #black
+  \override Beam.color = #black
+  \override Slur.color = #black
+  \override Tie.color = #black
+  \override Accidental.color = #black
+}
+
+% Deprecated: einzelne Noten innerhalb von \secondVoiceStyle mit schwarzem statt grauem Kopf
+schwarzkopf =
+  #(define-music-function (parser location noten) (ly:music?)
+    (begin (ly:warning "\\schwarzkopf brauchts nicht mehr, das kann ersatzlos weg!") noten))
+
+romanStanza =
+  #(define-music-function (parser location) ()
+  #{ \override StanzaNumber.style = #'roman #})
+
+#(define (number-or-number-list? x) (or (number? x) (number-list? x)))
+
+% "1,4" -> (1 4); Einträge, die keine Zahl sind, bleiben Strings ("1b,2b" -> ("1b" "2b"))
+#(define (stanza-numbers-from-string str)
+  (map (lambda (s) (or (string->number s) s))
+       (remove string-null? (map string-trim-both (string-split str #\,)))))
+
+% Kein number? hier, sonst kann der Parser 1,4 nicht mehr als Liste lesen
+#(define (stanza-numbers? x) (or (number-list? x) (string? x)))
+
+override-stanza =
+#(define-music-function (stanzanumbers) (number-or-number-list?)
+#{
+  \once \override StanzaNumber.details.custom-stanzanumber-override = #(if (number? stanzanumbers) (list stanzanumbers) stanzanumbers)
+#}
+)
+
+#(define (romanize-stanza-numbers numbers style)
+  (if (eq? style 'roman)
+      (map (lambda (n) (if (number? n) (format #f "~@r" n) n)) numbers)
+      numbers))
+
+#(define (format-stanza-numbers numbers style)
+  (string-join
+    (map (lambda (n) (format #f stanzaFormat n)) (romanize-stanza-numbers numbers style))
+    ", "))
+
+% Strophennummer, die erst beim Setzen aus den Eigenschaften des StanzaNumber-Grobs gebaut wird
+% (details.custom-stanza-type, details.custom-stanza-numbers, style, details.custom-inline-text).
+% So können \fstanza, \ref, \bridge und \repStartWithTag im selben Zeitschritt kombiniert werden.
+#(define-markup-command (formatted-stanza layout props) ()
+  #:properties ((details '()) (style #f))
+  (let* ((realstanza (ly:assoc-get 'custom-realstanza details #f))
+         (type (ly:assoc-get 'custom-stanza-type details 'verse))
+         (numbers (ly:assoc-get 'custom-stanzanumber-override details
+                    (ly:assoc-get 'custom-stanza-numbers details '())))
+         (inline-text (ly:assoc-get 'custom-inline-text details #f))
+         (inline-direction (ly:assoc-get 'custom-inline-direction details CENTER))
+         (rep-start (and inline-text (eqv? inline-direction LEFT)))
+         (roman-numbers (romanize-stanza-numbers numbers style))
+         (stanza-stencil
+           (and realstanza
+             (case type
+               ((ref) ((ly:output-def-lookup layout 'refMarkupFormatter) layout props roman-numbers))
+               ((bridge) ((ly:output-def-lookup layout 'bridgeMarkupFormatter) layout props roman-numbers))
+               (else (interpret-markup layout props (format-stanza-numbers numbers style))))))
+         (padded-stanza-stencil
+           (and stanza-stencil
+             (interpret-markup layout props (make-pad-left-markup 1 (make-stencil-markup stanza-stencil))))))
+    (if rep-start
+      (interpret-markup layout props
+        (make-concat-markup
+          (append
+            (if padded-stanza-stencil (list (make-stencil-markup padded-stanza-stencil) (make-hspace-markup 1)) '())
+            (list (make-override-markup '(font-series . normal) inline-text)))))
+      (or padded-stanza-stencil empty-stencil))))
+
+#(define (formatted-stanza-music type stanzanumbers)
+#{
+  \once \override StanzaNumber.details.custom-realstanza = ##t % set this to signal that there is a real stanza and no repeat signs
+  \once \override StanzaNumber.details.custom-stanza-type = #type
+  \once \override StanzaNumber.details.custom-stanza-numbers = #stanzanumbers
+  \stanza \markup \formatted-stanza
+#})
+
+% \fstanza 1      -> "1."
+% \fstanza 1,4    -> "1., 4." (nur im Notenmodus, z.B. \chordverse { \fstanza 1,4 } ...)
+% \fstanza "1,4"  -> "1., 4." (auch im \lyricmode, dort versteht LilyPond 1,4 nicht als Liste)
+fstanza =
+#(define-music-function (stanzanumbers) (stanza-numbers?)
+  (formatted-stanza-music 'verse
+    (if (string? stanzanumbers) (stanza-numbers-from-string stanzanumbers) stanzanumbers)))
+
+ref =
+#(define-music-function (stanzanumbers lyrics) ((number-list? (list)) ly:music?)
+#{ \lyricmode {
+    #(formatted-stanza-music 'ref stanzanumbers)
+    #lyrics
+  }
+#}
+)
+
+bridge =
+#(define-music-function (stanzanumbers lyrics) ((number-list? (list)) ly:music?)
+#{ \lyricmode {
+    #(formatted-stanza-music 'bridge stanzanumbers)
+    #lyrics
+  }
+#}
+)
+
+% prints a repStart Sign as stanza if the tag 'repeats is kept.
+% if there is a stanza set by \fstanza in the same moment, \formatted-stanza prints both.
+% Sets custom-inline-text for ChordPro export so it can collect the repeat sign separately
+repStartWithTag =
+#(define-music-function () ()
+#{ \lyricmode {
+  \tag #'repeats {
+    \once \override StanzaNumber.details.custom-inline-text = \repStart
+    \once \override StanzaNumber.details.custom-inline-direction = #LEFT
+    \stanza \markup \formatted-stanza
+  }
+} #})
+
+repStopWithTag = \lyricmode {
+  \tag #'repeats {
+    \once \override StanzaNumber.details.custom-inline-text = \repStop
+    \once \override StanzaNumber.details.custom-inline-direction = #RIGHT
+    \once \override StanzaNumber.font-series = #'normal
+    \once \override StanzaNumber.direction = 1
+    \stanza \markup { \pad-x-right #1 \repStop }
+  }
+}
+
+rightHyphen = \lyricmode {
+  \once \override StanzaNumber.font-series = #'normal
+  \once \override StanzaNumber.direction = 1
+  \stanza "-"
+}
+
+leftHyphen = \lyricmode {
+  \once \override StanzaNumber.font-series = #'normal
+  \stanza "-"
+}
+
+multiVerseSkips =
+#(define-music-function (parser location skips) (number?)
+  #{ \tag #'multiVerse { \repeat unfold #skips { \skip4 } } #})
+
+alt =
+#(define-music-function (parser location a b) (ly:music? ly:music?)
+  #{ \tag #'firstVerse { #a } \tag #'multiVerse { #b } #})
+
+updown =
+#(define-music-function (parser location word) (string?)
+(let ((first-char (string-take word 1))
+      (rest (substring word 1 (string-length word))))
+#{
+  \lyricmode {
+    \markup {
+      \tag #'up #(string-append (string-capitalize first-char) rest)
+      \tag #'down #(string-append (string-downcase first-char) rest)
+    }
+  }
+#}))
+
+dottedExtender = {
+  \override LyricExtender.style = #'dotted-line
+  \override LyricExtender.thickness = 2
+  \override LyricExtender.Y-offset = 0.1
+  \override LyricExtender.stencil =
+    #(lambda (grob)
+      (let* ((stil (ly:lyric-extender::print grob))
+             (nostil (null? stil))
+             (x-ext (if nostil 0 (ly:stencil-extent stil X))))
+         (if nostil
+           stil
+           (make-connected-line
+             (list
+               (cons (car x-ext) 0)
+               (cons (cdr x-ext) 0))
+             grob))))
+}
+
+melisOff = \set ignoreMelismata = ##t
+melisOn = \unset ignoreMelismata
+
+cue =
+#(define-music-function (zahlen) (number-list?)
+  #{
+      \tag #'cues {
+        \tweak self-alignment-X #LEFT
+        \mark
+          #(make-on-the-fly-markup
+            (lambda (layout props m) (interpret-markup layout (prepend-alist-chain 'cues zahlen props) (ly:output-def-lookup layout 'cueMarkup)))
+            (make-null-markup))
+      }
+  #})
+
+#(define-markup-command (ruf-style layout props text) (string?)
+   (interpret-markup layout props
+                     (markup #:italic (string-append "(" text ")"))))
+rufWithMarkup =
+#(define-music-function (text) (markup?)
+   #{
+     \lyricmode {
+       \once \override StanzaNumber.font-series = #'normal
+       \once \override StanzaNumber.direction = 1
+       \stanza #text
+     }
+   #})
+ruf =
+#(define-music-function (text) (string?)
+   (rufWithMarkup (make-ruf-style-markup text)))
+
+underlineOn =
+#(define-music-function () ()
+   #{
+     \override LyricText.stencil =
+     #(lambda (grob)
+        (grob-interpret-markup grob (make-underline-markup (ly:grob-property grob 'text))))
+   #})
+
+underlineOff =
+#(define-music-function () ()
+   #{
+     \revert LyricText.stencil
+   #})

private_includes/base/chord_settings.ily

@@ -38,87 +38,86 @@ shiftChords = #(define-music-function (parser location xshift chords) (number? l
 	$chords
 #})
 
-altChord = #(define-music-function (parser location mainchord altchord) (ly:music? ly:music?)
-(define (chord-namer in-pitches bass inversion context)
-#{
-  \markup {
-    \translate #'(-0.5 . 0)
-    \score {
-      \chords { #mainchord \klamm #altchord }
-      \layout {
-        \LAYOUT
-        \context {
-          \ChordNames
-          \override ChordName.extra-spacing-width = #'(0 . 0.3)
-        }
-        \context {
-          \Score
-          \override SpacingSpanner.spacing-increment = 0
-        }
-      }
-    }
-  }
-#})
-#{
-  \once \set chordNameFunction = #chord-namer
-	#mainchord
-#})
+altChord =
+#(define-music-function (parser location mainchord altchord) (ly:music? ly:music?)
+  (let* ((chord-name (lambda (in-pitches bass inversion context)
+           (make-line-markup (list
+             (ignatzek-chord-names in-pitches bass inversion context)
+             (make-hspace-markup 0.3)
+             (parenthesis-ignatzek-chord-names (music-pitches (transposable (cons (car (music-pitches mainchord)) (car in-pitches)) (music-clone altchord))) '() '() context)
+             ))
+           )))
+    #{
+      \once \set chordNameFunction = #chord-name
+      #mainchord
+    #}))
 
-% kleine Mollakkorde und Alteration ausgeschrieben
-#(define (note-name->german-markup-nosym pitch lowercase?)
-   (define (pitch-alteration-semitones pitch) (inexact->exact (round (* (ly:pitch-alteration pitch) 2))))
-   (define (accidental->markup alteration name)
-     (if (= alteration 0)
-         (make-line-markup (list empty-markup))
-          (if (= alteration FLAT)
-              (if (equal? name "B")
-                  ""
-              ;   (make-line-markup (list (make-hspace-markup 0.2)
-              ;     (make-tiny-markup (make-raise-markup 1.2
-              ;     (make-musicglyph-markup (assoc-get alteration standard-alteration-glyph-name-alist ""))))
-              ;   ))
-              (if (or (equal? name "E") (equal? name "A")) "s" "es"))
-              "is")
-         ))
-   (define (conditional-string-downcase str condition)
-     (if condition (string-downcase str) str))
 
-   (let* ((name (ly:pitch-notename pitch))
-         (alt-semitones  (pitch-alteration-semitones pitch))
-	 (n-a (if (member (cons name alt-semitones) `((6 . -1) (6 . -2)))
-		  (cons 7 (+ 0 alt-semitones))
-		  (cons name alt-semitones))))
-    (make-line-markup
-     (list
-      (make-simple-markup
-       (conditional-string-downcase
-		(vector-ref #("C" "D" "E" "F" "G" "A" "H" "B") (car n-a))
-		lowercase?))
-       (accidental->markup (/ (cdr n-a) 2) (vector-ref #("C" "D" "E" "F" "G" "A" "H" "B") (car n-a)) ))))
-)
+% Akkorde werden so transponiert, dass sie passen, wenn man mit Kapo im angegebenen Bund spielt
+capoTranspose =
+#(define-music-function (fret chords) (number? ly:music?)
+  (define semi->pitch
+    (make-semitone->pitch
+      (music-pitches
+        #{ h b a gis g fis f e es d cis c #})))
+  (transpose
+    (ly:pitch-transpose (semi->pitch fret) (ly:make-pitch 0 0))
+    (ly:make-pitch 0 0)
+    chords))
 
 % additional bass notes should get uppercased
-#(define (bassnote-name->german-markup-nosym pitch lowercase?)(note-name->german-markup-nosym pitch #f))
+#(define (bassnote-name->german-markup-nosym pitch lowercase?)((chord-name:name-markup 'deutsch) pitch #f))
 
+defaultChordPrintings = {
+  <c g>-\markup { \super "5" }
+  %% Dur
+  <c e g a>-\markup { \super "6" } %Standardverhalten
+  <c e a >-\markup { \super "6(no5)" }
+  <c e g a d'>-\markup { \super "6/9" }
+  <c e g b d'>-\markup { \super "9" } %Standardverhalten
+  <c e g b d' f'>-\markup { \super "11" } %Standardverhalten
+  <c e g b d' a'>-\markup { \super "13" }
+  %add chords
+  <c e g d'>-\markup { \super "add9" }
+  <c e g f'>-\markup { \super "add11" }
+  <c e g a'>-\markup { \super "add13" }
+  %major chords
+  <c e g h d'>-\markup { \super "maj9" }
+  %% Moll
+  <c es g a>-\markup { \super "6" } %Standardverhalten
+  <c es a >-\markup { \super "6(no5)" }
+  <c es g a d'>-\markup { \super "6/9" }
+  <c es g b d'>-\markup { \super "9" } %Standardverhalten
+  <c es g b d' f'>-\markup { \super "11" } %Standardverhalten
+  <c es g b d' a'>-\markup { \super "13" }
+  %add chords
+  <c es g d'>-\markup { \super "add9" }
+  <c es g f'>-\markup { \super "add11" }
+  <c es g a'>-\markup { \super "add13" }
+  %major chords
+  <c es g h d'>-\markup { \super "maj9" }
+}
 
 #(define chordNameExceptions
-  (if (defined? 'customChordPrintings)
-  (sequential-music-to-chord-exceptions customChordPrintings #t)
-  '()))
+  (append
+    (if (defined? 'customChordPrintings)
+      (sequential-music-to-chord-exceptions customChordPrintings #t)
+      '())
+    (sequential-music-to-chord-exceptions defaultChordPrintings #t)))
 
 generalLayout = \layout {
   \generalLayout
   \context {
     \ChordNames
-    \semiGermanChords
     \override ChordName.font-size = \songScoreChordFontSize
     \override ChordName.font-series = \songChordFontSeries
     \override ChordName.font-family = #'serif
     chordNameLowercaseMinor = ##t
     chordChanges = ##t
-    % eigenen chordRootNamer damit F# = Fis und Gb = Ges (also alteration ausgeschrieben)
-    chordRootNamer = #note-name->german-markup-nosym
+    chordRootNamer = #(chord-name:name-markup 'deutsch)
     chordNoteNamer = #bassnote-name->german-markup-nosym
+    additionalPitchPrefix = ""
+
     majorSevenSymbol = "maj7"
     chordNameExceptions = \chordNameExceptions
   }
@@ -156,7 +155,7 @@ Ensure_first_chord_after_line_break_printed_engraver =
                   ; the current chord handling implementation in lilypond uses 'begin-of-line-visible to mark repeated chords
                   (ly:grob-set-property! grob 'begin-of-line-visible #f))
                 (set! last-system-column-rank current-system-column-rank)
-                (ly:chord-name::after-line-breaking grob)
+                (item::enforce-musical-break-visibility grob)
                 )))))))
 
 % If you add this engraver to ChordNames Context chords get only printed on chordchanges and not at newline.
@@ -167,4 +166,4 @@ Ignoring_newline_chord_changes_engraver =
        ((chord-name-interface this-engraver grob source-engraver)
          (when (and (ly:context-property ctx 'chordChanges #f) (ly:grob-property grob 'begin-of-line-visible #f))
                   (ly:grob-suicide! grob)
-                )))))
+                )))))

private_includes/base/compat_lilypond_2_26.ily

@@ -0,0 +1,11 @@
+% Abwärtskompatibilität zu LilyPond 2.26.
+% Wird von all.ily nur eingebunden, wenn die laufende LilyPond-Version älter als 2.27 ist.
+% Alles andere ist für die aktuelle 2.27 geschrieben.
+
+% Ab 2.27 gibt es \stanza als Musikfunktion (StanzaEvent), in 2.26 nur die Kontext-Property stanza.
+stanza =
+#(define-music-function (text) (markup?)
+  (context-spec-music (make-property-set 'stanza text) 'Bottom))
+
+% Ab 2.27 heißt ly:chord-name::after-line-breaking item::enforce-musical-break-visibility.
+#(define item::enforce-musical-break-visibility ly:chord-name::after-line-breaking)

private_includes/base/custom_indentation.ily

@@ -0,0 +1,135 @@
+% https://lsr.di.unimi.it/LSR/Snippet?id=1098
+%%%%%%%% HEADER %%%%%%%%
+%
+% this code was prompted by
+% https://lists.gnu.org/archive/html/lilypond-user/2019-07/msg00139.html
+% and offers a pseudoIndent hack suitable for general use
+
+% keywords:
+% indent short-indent indentation system line
+% mid-score temporarily arbitrary individual single just only once
+% coda margin
+% mouse's tale acrostic mesostic spine
+
+%%%%%%%% PSEUDOINDENT FUNCTIONS %%%%%%%%
+
+% these two functions are for indenting individual systems
+% - to left-indent a system, apply \pseudoIndent before the music continues
+% - \pseudoIndents is similar, but lets you also indent on the right
+% - both provide an option for changing that system's instrument names
+
+% N.B. these functions
+% - assume application to non-ragged lines (generally the default)
+% - include a manual \break to ensure application at line start
+% - misbehave if called more than once at the same line start
+
+% the parameters of the (full) pseudoIndents function are:
+% 1: name-tweaks
+%      usually omitted; accepts replacement \markup for instrument names
+%      as an ordered list; starred elements leave their i-names unchanged.
+% 2: left-indent
+%      additional left-indentation, in staff-space units; can be negative,
+%      but avoid a total indentation which implies (unsupported) stretching.
+% 3: right-indent
+%      amount of right-indentation, in staff-space units; can be negative.
+%      - not offered by the (reduced) pseudoIndent function
+
+
+pseudoIndents = % inline alternative to a new \score, also with right-indent
+#(define-music-function (name-tweaks left-indent right-indent)
+  ((markup-list? '()) number? number?)
+  (define (warn-stretched p1 p2) (ly:input-warning (*location*) (G_
+    " pseudoIndents ~s ~s is stretching staff; expect distorted layout") p1 p2))
+  (let* (
+    (narrowing (+ left-indent right-indent)) ; of staff implied by args
+
+    (set-staffsymbol! (lambda (staffsymbol-grob) ; change staff to new width
+      (let* (
+        (left-bound (ly:spanner-bound staffsymbol-grob LEFT))
+        (left-moment (ly:grob-property left-bound 'when))
+        (capo? (moment<=? left-moment ZERO-MOMENT)) ; in first system of score
+        (layout (ly:grob-layout staffsymbol-grob))
+        (lw (ly:output-def-lookup layout 'line-width)) ; debugging info
+        (indent (ly:output-def-lookup layout (if capo? 'indent 'short-indent)))
+        (old-stil (ly:staff-symbol::print staffsymbol-grob))
+        (staffsymbol-x-ext (ly:stencil-extent old-stil X))
+        ;; >=2.19.16's first system has old-stil already narrowed [2]
+        ;; compensate for this (ie being not pristine) when calculating
+        ;; - old leftmost-x (its value is needed when setting so-called 'width)
+        ;; - the new width and position (via local variable narrowing_)
+        (ss-t (ly:staff-symbol-line-thickness staffsymbol-grob))
+        (pristine? (<= 0 (car staffsymbol-x-ext) ss-t)) ; would expect half
+        (leftmost-x (+ indent (if pristine? 0 narrowing)))
+        (narrowing_ (if pristine? narrowing 0)) ; uses 0 if already narrowed
+        (old-width (+ (interval-length staffsymbol-x-ext) ss-t))
+        (new-width (- old-width narrowing_))
+        (new-rightmost-x (+ leftmost-x new-width)) ; and set! this immediately
+        (junk (ly:grob-set-property! staffsymbol-grob 'width new-rightmost-x))
+        (in-situ-stil (ly:staff-symbol::print staffsymbol-grob))
+        (new-stil (ly:stencil-translate-axis in-situ-stil narrowing_ X))
+       ;(new-stil (stencil-with-color new-stil red)) ; for when debugging
+        (new-x-ext (ly:stencil-extent new-stil X)))
+      (ly:grob-set-property! staffsymbol-grob 'stencil new-stil)
+      (ly:grob-set-property! staffsymbol-grob 'X-extent new-x-ext)
+      )))
+
+    (set-X-offset! (lambda (margin-grob) ; move grob across to line start
+      (let* (
+        (old (ly:grob-property-data margin-grob 'X-offset))
+        (new (lambda (grob) (+ (if (procedure? old) (old grob) old) narrowing))))
+      (ly:grob-set-property! margin-grob 'X-offset new))))
+
+    (tweak-text! (lambda (i-name-grob mkup) ; tweak both instrumentname texts
+      (if (and (markup? mkup) (not (string=? (markup->string mkup) "*")))
+      (begin
+        (ly:grob-set-property! i-name-grob 'long-text mkup)
+        (ly:grob-set-property! i-name-grob 'text mkup)
+        )))) ; else retain existing text
+
+    (install-narrowing (lambda (leftedge-grob) ; on staves, + adapt left margin
+      (let* (
+        (sys (ly:grob-system leftedge-grob))
+        (all-grobs (ly:grob-array->list (ly:grob-object sys 'all-elements)))
+        (grobs-named (lambda (name)
+          (filter (lambda (x) (eq? name (grob::name x))) all-grobs)))
+        (first-leftedge-grob (list-ref (grobs-named 'LeftEdge) 0))
+        (relsys-x-of (lambda (g) (ly:grob-relative-coordinate g sys X)))
+        (leftedge-x (relsys-x-of first-leftedge-grob))
+        (leftedged? (lambda (g) (= (relsys-x-of g) leftedge-x)))
+        (leftedged-ss (filter leftedged? (grobs-named 'StaffSymbol))))
+      (if (eq? leftedge-grob first-leftedge-grob) ; ignore other leftedges [1]
+       (begin
+         (for-each set-staffsymbol! leftedged-ss)
+         (for-each set-X-offset! (grobs-named 'SystemStartBar))
+         (for-each set-X-offset! (grobs-named 'InstrumentName))
+         (for-each tweak-text! (grobs-named 'InstrumentName) name-tweaks)
+       ))))))
+
+  (if (negative? narrowing) (warn-stretched left-indent right-indent))
+  #{ % and continue anyway
+    % ensure that these overrides are applied only at begin-of-line
+    \break % (but this does not exclude unsupported multiple application)
+    % give the spacing engine notice regarding the loss of width for music
+    \once \override Score.LeftEdge.X-extent = #(cons narrowing narrowing)
+    % discard line start region of staff and reassemble left-margin elements
+    \once \override Score.LeftEdge.after-line-breaking = #install-narrowing
+    % shift the system to partition the narrowing between left and right
+    \overrideProperty Score.NonMusicalPaperColumn.line-break-system-details
+    .X-offset #(- right-indent)
+    % prevent a leftmost barnumber entering a stretched staff
+    \once \override Score.BarNumber.horizon-padding = #(max 1 (- 1 narrowing))
+  #}))
+
+pseudoIndent = % for changing just left-indent
+#(define-music-function (name-tweaks left-indent)
+  ((markup-list? '()) number?)
+  #{
+    \pseudoIndents $name-tweaks $left-indent 0
+  #})
+
+% [1] versions <2.19.1 can have end-of-line leftedges too
+%     - these were eliminated in issue 3761
+% [2] versions >=2.19.16: the first system behaves differently from the rest
+%     - a side effect of issue 660 ?
+% [3] versions >=2.23.0: LeftEdge's position may well differ in Y (but not in X)
+%     - a side effect of issue 6084 ?

private_includes/base/default_songinfo_style.ily

@@ -0,0 +1,190 @@
+\paper {
+  poetPrefix = "Worte:"
+  composerPrefix = "Weise:"
+  compositionPrefix = "Satz:"
+  adaptionTextPrefix = "Bearbeitung:"
+  adaptionMusicPrefix = "Bearbeitung:"
+  poetAndComposerEqualPrefix = "Worte und Weise:"
+  voicePrefix = "Stimme:"
+  versePrefix = "Strophe:"
+  refPrefix = "Refrain:"
+  translationAuthorPrefix = "Übersetzung:"
+  translationPrefix = "Übersetzung:"
+  pronunciationPrefix = "Aussprache:"
+  interludePrefix = "Zwischenspiel:"
+  bridgePrefix = "Bridge:"
+  author-joiner = #(lambda (author-list) (string-join author-list ", "))
+
+  authorFormat =
+    #(lambda (noDetails name trail_name birth_year death_year organization)
+        (let ((string-present (lambda (str) (and str (not (and (string? str) (string-null? str))))))
+              (render_informations (lambda (infolist) (string-append (car infolist) (if (or noDetails (null? (cdr infolist))) "" (string-append " (" (string-join (cdr infolist) ", ") ")"))))))
+            (if (or (string-present trail_name) (string-present name))
+              (render_informations (filter string-present (list
+                trail_name
+                name
+                (if (and (string-present birth_year) (string-present death_year))
+                  (ly:format "~a‒~a" birth_year death_year)
+                  (if (string-present birth_year)
+                    (ly:format "*~a" birth_year)
+                    (if (string-present death_year) (ly:format "†~a" death_year) "")))
+                organization
+              )))
+              ""
+          )))
+
+  authorContributionFormat =
+    #(lambda* (render-contribution-group render-partial-contribution-group #:key
+        (poetIds '())
+        (translatorIds '())
+        (versePoetData '())
+        (composerIds '())
+        (verseComposerData '())
+        (refComposerIds '())
+        (voiceComposerData '())
+        (compositionIds '())
+        (adaptionTextIds '())
+        (adaptionMusicIds '())
+        (bridgeIds '())
+        (interludeIds '())
+        (year_text #f)
+        (year_translation #f)
+        (year_melody #f)
+        (year_melody_meloref #f)
+        (year_composition #f)
+        (year_adaption_text #f)
+        (year_adaption_music #f)
+        (poetAndComposerEqualPrefix "")
+        (poetPrefix "")
+        (composerPrefix "")
+        (translationAuthorPrefix "")
+        (pronunciationPrefix "")
+        (compositionPrefix "")
+        (adaptionTextPrefix "")
+        (adaptionMusicPrefix "")
+        (bridgePrefix "")
+        (interludePrefix "")
+        (refPrefix ""))
+      (if (and
+            (equal? poetIds composerIds)
+            (null? translatorIds)
+            (null? versePoetData)
+            (null? verseComposerData)
+            (null? refComposerIds)
+            (null? voiceComposerData)
+            (null? compositionIds)
+            (null? adaptionTextIds)
+            (null? adaptionMusicIds)
+            (null? bridgeIds)
+            (null? interludeIds))
+        (list
+          (join-present (list
+            (render-contribution-group poetAndComposerEqualPrefix poetIds)
+            (if (equal? year_text year_melody) year_text (join-present (list year_text year_melody) "/"))
+          ) ", ")
+          #f)
+        (list
+          (if (and (null? poetIds) (null? versePoetData) (null? translatorIds)) #f
+            (string-append
+              poetPrefix
+              " "
+              (join-present (list
+                (join-present (list
+                  (render-contribution-group "" poetIds)
+                  year_text
+                ) ", ")
+                (render-partial-contribution-group 'versePrefix versePoetData)
+                (join-present (list
+                  (render-contribution-group adaptionTextPrefix adaptionTextIds)
+                  year_adaption_text
+                ) ", ")
+                (join-present (list
+                  (render-contribution-group translationAuthorPrefix translatorIds)
+                  year_translation
+                ) ", ")
+              ) "; ")
+            ))
+          (if (and
+                (null? composerIds)
+                (null? compositionIds)
+                (null? adaptionMusicIds)
+                (null? verseComposerData)
+                (null? refComposerIds)
+                (null? voiceComposerData)
+                (null? bridgeIds)
+                (null? interludeIds)) #f
+            (string-append
+              composerPrefix
+              " "
+              (join-present (list
+                (join-present (list
+                  (render-contribution-group "" composerIds)
+                  year_melody
+                ) ", ")
+                (render-partial-contribution-group 'versePrefix verseComposerData)
+                (join-present (list
+                  (render-contribution-group refPrefix refComposerIds)
+                  year_melody_meloref
+                ) ", ")
+                (render-partial-contribution-group 'voicePrefix voiceComposerData)
+                (join-present (list
+                  (render-contribution-group compositionPrefix compositionIds)
+                  year_composition
+                ) ", ")
+                (join-present (list
+                  (render-contribution-group adaptionMusicPrefix adaptionMusicIds)
+                  year_adaption_music
+                ) ", ")
+                (render-contribution-group bridgePrefix bridgeIds)
+                (render-contribution-group interludePrefix interludeIds)
+              ) "; ")
+            )))))
+
+
+  songinfoMarkup =
+    #(make-on-the-fly-markup
+      (lambda (layout props m)
+        (let* ((between-poet-and-composer-markup (chain-assoc-get 'header:between-poet-and-composer-markup props (make-hspace-markup 3)))
+              (poet-maybe-with-composer (chain-assoc-get 'songinfo:poet-maybe-with-composer props #f))
+              (composer (chain-assoc-get 'songinfo:composer props #f))
+              (copyright (chain-assoc-get 'songinfo:copyright props #f))
+              (infotext (chain-assoc-get 'songinfo:infotext props #f))
+              (translation (chain-assoc-get 'songinfo:translation props #f))
+              (pronunciation (chain-assoc-get 'songinfo:pronunciation props #f))
+              (year_text (chain-assoc-get 'songinfo:year_text props #f))
+              (year_melody (chain-assoc-get 'songinfo:year_melody props #f))
+              (poet-with-year (if (and poet-maybe-with-composer year_text) (string-append poet-maybe-with-composer ", " year_text) poet-maybe-with-composer))
+              (composer-with-year (if (and composer year_melody) (string-append composer ", " year_melody) composer))
+              (concat-markupped-strings (lambda (text)
+                (ly:regex-replace (ly:make-regex "(\\S+)(\\\\\\w+(?:\\s+\\[^\\{\\s]*|\\s*\\{[^\\}]*\\}))(\\S*)") text "\\concat {" 1 "\\line {" 2 "}" 3 "}")))
+              (string-with-paragraphs->markuplist (lambda (prefix text)
+                (if text
+                  (apply append
+                    (map
+                      (lambda (paragraph)
+                        (make-wordwrap-internal-markup-list #t
+                          #{ \markuplist { $(ly:parser-include-string (concat-markupped-strings paragraph)) } #}))
+                      (ly:regex-split (ly:make-regex "\r?\n[ \t\r\n]*\n[ \t\r\n]*") (string-append prefix text))))
+                  '())))
+              (poet-and-composer-markup-list
+                (string-with-paragraphs->markuplist "" (string-append
+                  (if poet-with-year (string-append "\n\n" poet-with-year) "")
+                  (if composer-with-year (string-append "\n\n" composer-with-year) "")
+                )))
+              (poet-and-composer-oneliner (if (and poet-with-year composer-with-year) (make-line-markup (cons (cadr poet-and-composer-markup-list) (cons between-poet-and-composer-markup (cddr poet-and-composer-markup-list)))) #f))
+              (current-line-width (chain-assoc-get 'line-width props (ly:output-def-lookup layout 'line-width))))
+          (stack-lines DOWN 0.0 (chain-assoc-get 'baseline-skip props)
+            (interpret-markup-list layout props
+              (append
+                (if (and poet-and-composer-oneliner (< (interval-length (ly:stencil-extent (interpret-markup layout props poet-and-composer-oneliner) X)) current-line-width))
+                  (list poet-and-composer-oneliner)
+                  poet-and-composer-markup-list)
+                (string-with-paragraphs->markuplist "" (string-append
+                  (if copyright (string-append "\n\n© " copyright) "")))
+                (string-with-paragraphs->markuplist "" infotext)
+                (string-with-paragraphs->markuplist (string-append (ly:output-def-lookup layout 'translationPrefix) " ") translation)
+                (string-with-paragraphs->markuplist (string-append (ly:output-def-lookup layout 'pronunciationPrefix) " ") pronunciation)
+                  )))))
+      (make-null-markup)
+    )
+}

private_includes/base/default_style.ily

@@ -0,0 +1,36 @@
+songFormatAndSize = "a5"
+songMargin = 5
+songInfoFontSize = 0
+songInfoLineWidthFraction = 0.9
+songTitleSize = 6
+songTitleFont = "Liberation Sans"
+songChordFont = "Liberation Sans"
+songLyricFont = "Liberation Sans"
+songChordFontSeries = #'bold
+songTextChordAlignment = #'left
+songScoreChordFontSize = 2
+songTextChordFontSize = \songScoreChordFontSize
+songTextChordDistance = 2.8
+songTextLineHeigth = 5.8
+songTocColumns = 3
+globalSize = 15
+lyricSize = 1.6
+stanzaFormat = "~a."
+refString = "Ref.:"
+refStringWithNumbers = "Ref. ~a:"
+bridgeString = "Bridge:"
+bridgeStringWithNumbers = "Bridge ~a:"
+% hübsche Wiederholungszeichen für den Liedtext
+repStart = "𝄆"
+repStop = "𝄇"
+customChordPrintings = {}
+
+\paper {
+  cueMarkup = \markup {
+    \italic
+      #(make-on-the-fly-markup (lambda (layout props m)
+        (interpret-markup layout props
+          (string-join (map (lambda (n) (format #f "~@r." n)) (chain-assoc-get 'cues props)) ", ")))
+        (make-null-markup))
+  }
+}

private_includes/base/embedded_songs.ily

@@ -0,0 +1,157 @@
+%% Mehrere Lieder in einer Liederdatei (z.B. zwei Lieder auf einer Seite)
+%%
+%% Das erste Lied ist das Hauptlied (HEADER), alle weiteren werden als
+%% eingebettete Lieder angemeldet. Eingebettete Lieder bekommen eigene
+%% Eintraege im Inhaltsverzeichnis, in den Kategorie-, Autoren- und
+%% Kapitelverzeichnissen, im PDF-Inhaltsverzeichnis, in der toc.csv und
+%% eine eigene Liednummer. Im Footer steht die Songinfo des letzten
+%% eingebetteten Lieds (abschaltbar mit footersong = ##f im HEADER bzw. mit
+%% footersong = \andereslied umstellbar), die Songinfo des Hauptlieds wird
+%% mit \songinfo-of selbst platziert.
+%%
+%% Beispiel:
+%%
+%%   \include "../../lilypond-song-includes/liedbausteine/lied_a.ly"
+%%   liedA = \captureSong
+%%   \include "../../lilypond-song-includes/liedbausteine/lied_b.ly"
+%%   liedB = \captureSong
+%%
+%%   TEXT = \markuplist {
+%%     \songinfo-of \liedA
+%%     \vspace #2
+%%     \embedded-song-title \liedB
+%%     \vspace #.5
+%%     \score { \songMusic \liedB \layout { \LAYOUT } }
+%%     \with-song \liedB {
+%%       \chordlyrics \secondVerse
+%%     }
+%%   }
+%%
+%%   \restoreSong \liedA
+%%   \embedSong \liedB
+%%   \include "public_includes/layout_bottom.ily"
+%%
+%% \captureSong sichert den Header (basicSongInfo) und die Variablen aus
+%% captured-song-variable-names, damit das naechste \include sie nicht
+%% ueberschreibt. Das Ergebnis ist ein normales Header-Modul, es kann also
+%% auch in \header { \liedA } verwendet werden.
+%%
+%% \restoreSong setzt basicSongInfo, HEADER und diese Variablen zurueck,
+%% TEXT aber nicht. TEXT also vor \restoreSong schreiben, solange darin noch
+%% Variablen des zuletzt eingebundenen Lieds (\secondVerse usw.) stehen.
+%%
+%% Ohne \with-song beziehen sich Strophen mit Akkorden auf das Hauptlied.
+%%
+%% Alle Verzeichniseintraege zeigen auf die erste Seite des Hauptlieds.
+
+#(define captured-song-variable-names '(MUSIC global firstVoice verseChords))
+
+#(define (song-variable song name)
+  (assq-ref (module-ref song 'captured-song-variables '()) name))
+
+#(define (extract-and-check-vars-from-module headermodule varlist)
+  (let* ((headervars (if (module? headermodule) (hash-map->list cons (struct-ref headermodule 0)) '()))
+         (extract-var-and-check (lambda (headervar)
+           (let* ((variableref (assoc-ref headervars headervar))
+                  (extracted (if variableref (variable-ref variableref) #f)))
+              (if (and extracted (not (and (string? extracted) (string-null? extracted)))) extracted #f)))))
+    (map (lambda (varsymbol)
+      (cons varsymbol (extract-var-and-check varsymbol))
+    ) varlist)))
+
+% Text des PDF-Lesezeichens eines Lieds, #f wenn es keins bekommt.
+% Gleiche Regel wie in build-full-title.
+#(define (song-pdf-bookmark-title headermodule)
+  (let* ((vars (extract-and-check-vars-from-module headermodule '(title starttext)))
+         (title (assq-ref vars 'title))
+         (starttext (assq-ref vars 'starttext))
+         (as-string (lambda (m) (if (markup? m) (markup->string m) ""))))
+    (cond ((and title starttext) (string-append (as-string starttext) " | " (as-string title)))
+          (title (as-string title))
+          (starttext (string-append (as-string starttext) " | "))
+          (else #f))))
+
+#(define (embedded-song-list songs)
+  (if (list? songs) (filter module? songs) '()))
+
+#(define (embedded-songs-of-header headermodule)
+  (if (module? headermodule)
+    (embedded-song-list (module-ref headermodule 'embeddedsongs '()))
+    '()))
+
+% Ersetzt alle header:*-Properties durch die Felder aus headermodule, damit
+% keine Felder des Hauptlieds in das andere Lied durchsickern.
+#(define (header-module->props headermodule props)
+  (let ((header-key? (lambda (entry)
+          (and (pair? entry) (symbol? (car entry))
+               (string-prefix? "header:" (symbol->string (car entry)))))))
+    (cons
+      (map (lambda (kv) (cons (symbol-append 'header: (car kv)) (cdr kv)))
+           (ly:module->alist headermodule))
+      (map (lambda (alist) (remove header-key? alist)) props))))
+
+captureSong =
+#(define-scheme-function () ()
+  (let ((song (make-module)))
+    (ly:module-copy song basicSongInfo)
+    (module-define! song 'captured-song-variables
+      (filter-map
+        (lambda (name)
+          (let ((value (ly:parser-lookup name)))
+            (and (not (null? value)) (cons name value))))
+        captured-song-variable-names))
+    song))
+
+% Stellt basicSongInfo, HEADER und die gesicherten Variablen eines Lieds
+% wieder her, als waere es das zuletzt eingebundene.
+restoreSong =
+#(define-void-function (song) (module?)
+  (for-each
+    (lambda (kv) (ly:parser-define! (car kv) (cdr kv)))
+    (module-ref song 'captured-song-variables '()))
+  (ly:parser-define! 'basicSongInfo song)
+  (ly:parser-define! 'HEADER #{ \bookpart { \header { $song } } #}))
+
+embedSong =
+#(define-void-function (song) (module?)
+  (set! EMBEDDED_SONGS (append EMBEDDED_SONGS (list song))))
+
+songMusic =
+#(define-music-function (song) (module?)
+  (let ((music (song-variable song 'MUSIC)))
+    (if (ly:music? music) music (make-music 'SequentialMusic))))
+
+% Strophen, \fromproperty #'header:... usw. beziehen sich innerhalb auf das
+% angegebene Lied. Die Transposition des Hauptlieds wird nicht uebernommen.
+#(define-markup-list-command (with-song layout props song args) (module? markup-list?)
+  (let* ((music-or-empty (lambda (name)
+           (let ((music (song-variable song name)))
+             (if (ly:music? music) music (make-music 'SequentialMusic)))))
+         (verseChords (music-or-empty 'verseChords))
+         (global (music-or-empty 'global))
+         (firstVoice (music-or-empty 'firstVoice)))
+    (interpret-markup-list layout
+      (prepend-alist-chain 'verse-chords #{ \chords { $verseChords } #}
+        (prepend-alist-chain 'verse-reference-voice #{ $global $firstVoice #}
+          (prepend-alist-chain 'transposition (cons #f #f)
+            (header-module->props song props))))
+      args)))
+
+#(define-markup-command (songinfo-of layout props song) (module?)
+  (interpret-markup layout (header-module->props song props)
+    (make-fractional-line-width-markup (make-songinfo-content-markup))))
+
+#(define-markup-command (embedded-song-title layout props song) (module?)
+  (interpret-markup layout (header-module->props song props)
+    (make-fill-line-markup (list (ly:output-def-lookup layout 'defaultTitleMarkup)))))
+
+% PDF-Lesezeichen der eingebetteten Lieder, wird von build-full-title direkt
+% nach dem Lesezeichen des Hauptlieds ausgegeben.
+#(define-markup-command (embedded-songs-to-pdf-toc layout props) ()
+  (apply ly:stencil-add
+    (cons empty-stencil
+      (filter-map
+        (lambda (song)
+          (let ((bookmark (song-pdf-bookmark-title song)))
+            (and bookmark (make-pdf-toc-stencil bookmark 0))))
+        (embedded-song-list (chain-assoc-get 'header:embeddedsongs props '()))))))

private_includes/base/eps_file_from_song_dir.ily

@@ -0,0 +1,28 @@
+% songfilename auch im Markup verfügbar machen
+#(define-markup-list-command (setsongfilename layout props songfilename markuplist)
+  (string? markup-list?)
+  (interpret-markup-list layout (prepend-alist-chain 'songfilename songfilename props) markuplist))
+
+#(define-markup-command (customEps layout props ysize filename)(number? string?)
+   #:properties ((songfilename ""))
+   (interpret-markup layout props
+     (let* ((defaulttitlemarkup (ly:output-def-lookup layout 'defaultTitleMarkup))
+            ;; Determine the song directory to resolve the EPS relative to.
+            ;; In TEXT the name arrives via the markup props (\setsongfilename),
+            ;; but inside MUSIC (e.g. \mark) the props do not carry it, so we
+            ;; fall back to the value stored in the score's \layout block.
+            (layout-songfilename (ly:output-def-lookup layout 'songfilename #f))
+            (songdir (cond ((not (string-null? songfilename)) songfilename)
+                           ((and (string? layout-songfilename)
+                                 (not (string-null? layout-songfilename)))
+                            layout-songfilename)
+                           (else #f)))
+            (filepath (if songdir
+                          (ly:format "~a/~a/~a" songPath songdir filename)
+                          filename)))
+       (if (file-exists? filepath)
+             (make-epsfile-markup Y ysize filepath)
+             (if defaulttitlemarkup
+                 defaulttitlemarkup
+                 (ly:format "file does not exist ~a" filepath))
+))))

private_includes/base/footer_with_songinfo.ily

@@ -1,44 +1,57 @@
 #(use-modules (ice-9 receive))
-#(define-markup-command (print-songinfo layout props) ()
+#(define (format-author author-format-function authorId noDetails)
+  (let ((author (if (defined? 'AUTHOR_DATA) (assoc-ref AUTHOR_DATA authorId) #f)))
+    (if author
+      (author-format-function
+        noDetails
+        (assoc-ref author "name")
+        (assoc-ref author "trail_name")
+        (assoc-ref author "birth_year")
+        (assoc-ref author "death_year")
+        (assoc-ref author "organization")
+      )
+      (if (string-null? authorId)
+          "unbekannt"
+          authorId))))
+
+#(define (find-author-ids-by contributionType authors)
+  (if authors
+    (filter-map (lambda (authordata) (if (member contributionType (cdr authordata)) (car authordata) #f)) authors)
+    (list)))
+
+#(define (find-author-id-with-part-numbers contributionType authors)
+  (if authors
+    (sort-list
+      (filter-map (lambda (authordata)
+        (let ((contributionNumbers (filter-map (lambda (contribution) (if (and (list? contribution) (equal? contributionType (car contribution))) (cadr contribution) #f)) (cdr authordata)))
+              (authorId (car authordata)))
+          (if (null? contributionNumbers) #f (cons authorId (sort-list contributionNumbers <)))
+        )) authors)
+      (lambda (a b) (< (cadr a) (cadr b))))
+    (list)))
+
+#(define (join-present items joiner)
+  (string-join (filter (lambda (item) (and (string? item) (not (string-null? (string-trim-both item))))) items) joiner))
+
+% Songinfo aus den header:*-Properties, ohne Pruefung auf die letzte Seite.
+#(define-markup-command (songinfo-content layout props) ()
   (define (songinfo-from songId key)
     (let ((song (if (defined? 'SONG_DATA) (assoc-ref SONG_DATA songId) #f)))
       (if song
         (assoc-ref song key)
         (ly:warning (ly:format "song with id ~a not found" songId)))))
 
-  (define (format-author authorId noDetails)
-    (let ((author (if (defined? 'AUTHOR_DATA) (assoc-ref AUTHOR_DATA authorId) #f)))
-      (if author
-        ((ly:output-def-lookup layout 'authorFormat)
-          noDetails
-          (assoc-ref author "name")
-          (assoc-ref author "trail_name")
-          (assoc-ref author "birth_year")
-          (assoc-ref author "death_year")
-          (assoc-ref author "organization")
-        )
-        "unbekannt")))
+  (define* (default-author-format authorId #:optional (noDetails #f))
+    (format-author (ly:output-def-lookup layout 'authorFormat) authorId noDetails))
 
   (define (format-poet poetId)
-    (string-append (ly:output-def-lookup layout 'poetPrefix) " " (format-author poetId #f)))
+    (string-append (ly:output-def-lookup layout 'poetPrefix) " " (default-author-format poetId)))
 
   (define (format-composer composerId)
-    (string-append (ly:output-def-lookup layout 'composerPrefix) " " (format-author composerId #f)))
+    (string-append (ly:output-def-lookup layout 'composerPrefix) " " (default-author-format composerId)))
 
   (define (format-poet-and-composer authorId)
-    (string-append (ly:output-def-lookup layout 'poetAndComposerEqualPrefix) " " (format-author authorId #f)))
-
-  (define (find-author-ids-by contributionType authors)
-    (filter-map (lambda (authordata) (if (member contributionType (cdr authordata)) (car authordata) #f)) authors)
-  )
-
-  (define (find-author-id-with-part-numbers contributionType authors)
-    (filter-map (lambda (authordata)
-      (let ((contributionNumbers (filter-map (lambda (contribution) (if (and (list? contribution) (equal? contributionType (car contribution))) (cadr contribution) #f)) (cdr authordata)))
-            (authorId (car authordata)))
-        (if (null? contributionNumbers) #f (cons authorId contributionNumbers))
-      )) authors)
-  )
+    (string-append (ly:output-def-lookup layout 'poetAndComposerEqualPrefix) " " (default-author-format authorId)))
 
   (define (numbered-contribution-prefix contributionNumbers prefixLookup)
     (string-append
@@ -52,7 +65,7 @@
 
   (define (format-authors authorIds)
     (map (lambda (authorId)
-      (format-author
+      (default-author-format
         authorId
         (if (member authorId referencedAuthors)
           #t
@@ -65,7 +78,7 @@
   (define (render-contribution-group contributionPrefix authorIds)
     (if (null? authorIds)
       ""
-      (string-append contributionPrefix " " (string-join (format-authors authorIds) ", ")))
+      (string-append contributionPrefix " " ((ly:output-def-lookup layout 'author-joiner) (format-authors authorIds))))
   )
 
   (define (render-partial-contribution-group prefixLookup authorData)
@@ -74,83 +87,51 @@
       (let ((firstAuthorContributions (cdar authorData)))
         (receive (authorDataSame authorDataOther)
             (partition (lambda (authorEntry) (equal? (cdr authorEntry) firstAuthorContributions)) authorData)
-          (string-append
+          (join-present (list
             (render-contribution-group (numbered-contribution-prefix firstAuthorContributions prefixLookup) (map car authorDataSame))
-            " "
             (render-partial-contribution-group prefixLookup authorDataOther)
-          ))))
-  )
-
-  (define (join-present items joiner)
-    (string-join (filter (lambda (item) (and (string? item) (not (string-null? (string-trim-both item))))) items) joiner)
-  )
+            ) " ")))))
 
   (define (poet-and-composer-from-authors authors)
     (if authors
-      (let (
-            (poetIds (find-author-ids-by 'text authors))
-            (translatorIds (find-author-ids-by 'translation authors))
-            (versePoetData (find-author-id-with-part-numbers 'verse authors))
-            (composerIds (find-author-ids-by 'melody authors))
-            (verseComposerData (find-author-id-with-part-numbers 'meloverse authors))
-            (voiceComposerData (find-author-id-with-part-numbers 'voice authors))
-            (compositionIds (find-author-ids-by 'composition authors))
-            (bridgeIds (find-author-ids-by 'bridge authors))
-            (interludeIds (find-author-ids-by 'interlude authors))
-            (year_text (chain-assoc-get 'header:year_text props #f))
-            (year_translation (chain-assoc-get 'header:year_translation props #f))
-            (year_melody (chain-assoc-get 'header:year_melody props #f))
-            (year_composition (chain-assoc-get 'header:year_composition props #f))
-            )
-        (if (and (equal? poetIds composerIds) (null? translatorIds) (null? versePoetData) (null? verseComposerData) (null? voiceComposerData) (null? compositionIds) (null? bridgeIds) (null? interludeIds))
-          (list
-            (join-present (list
-              (render-contribution-group (ly:output-def-lookup layout 'poetAndComposerEqualPrefix) poetIds)
-              (if (equal? year_text year_melody) year_text (join-present (list year_text year_melody) "/"))
-            ) ", ")
-            #f)
-          (list
-            (if (and (null? poetIds) (null? versePoetData) (null? translatorIds)) #f
-              (string-append
-                (ly:output-def-lookup layout 'poetPrefix)
-                " "
-                (join-present (list
-                  (join-present (list
-                    (render-contribution-group "" poetIds)
-                    year_text
-                  ) ", ")
-                  (render-partial-contribution-group 'versePrefix versePoetData)
-                  (join-present (list
-                    (render-contribution-group (ly:output-def-lookup layout 'translationPrefix) translatorIds)
-                    year_translation
-                  ) ", ")
-                ) "; ")
-              ))
-            (if (and (null? composerIds) (null? compositionIds) (null? verseComposerData) (null? voiceComposerData) (null? bridgeIds) (null? interludeIds)) #f
-              (string-append
-                (ly:output-def-lookup layout 'composerPrefix)
-                " "
-                (join-present (list
-                  (join-present (list
-                    (render-contribution-group "" composerIds)
-                    year_melody
-                  ) ", ")
-                  (render-partial-contribution-group 'versePrefix verseComposerData)
-                  (render-partial-contribution-group 'voicePrefix voiceComposerData)
-                  (join-present (list
-                    (render-contribution-group (ly:output-def-lookup layout 'compositionPrefix) compositionIds)
-                    year_composition
-                  ) ", ")
-                  (render-contribution-group (ly:output-def-lookup layout 'bridgePrefix) bridgeIds)
-                  (render-contribution-group (ly:output-def-lookup layout 'interludePrefix) interludeIds)
-                ) "; ")
-              )))))
+      ((ly:output-def-lookup layout 'authorContributionFormat)
+        render-contribution-group
+        render-partial-contribution-group
+        #:poetIds (find-author-ids-by 'text authors)
+        #:translatorIds (find-author-ids-by 'translation authors)
+        #:versePoetData (find-author-id-with-part-numbers 'verse authors)
+        #:composerIds (find-author-ids-by 'melody authors)
+        #:verseComposerData (find-author-id-with-part-numbers 'meloverse authors)
+        #:refComposerIds (find-author-ids-by 'meloref authors)
+        #:voiceComposerData (find-author-id-with-part-numbers 'voice authors)
+        #:compositionIds (find-author-ids-by 'composition authors)
+        #:adaptionTextIds (find-author-ids-by 'adaption_text authors)
+        #:adaptionMusicIds (find-author-ids-by 'adaption_music authors)
+        #:bridgeIds (find-author-ids-by 'bridge authors)
+        #:interludeIds (find-author-ids-by 'interlude authors)
+        #:year_text (chain-assoc-get 'header:year_text props #f)
+        #:year_translation (chain-assoc-get 'header:year_translation props #f)
+        #:year_melody (chain-assoc-get 'header:year_melody props #f)
+        #:year_melody_meloref (chain-assoc-get 'header:year_melody_meloref props #f)
+        #:year_composition (chain-assoc-get 'header:year_composition props #f)
+        #:year_adaption_text (chain-assoc-get 'header:year_adaption_text props #f)
+        #:year_adaption_music (chain-assoc-get 'header:year_adaption_music props #f)
+        #:poetAndComposerEqualPrefix (ly:output-def-lookup layout 'poetAndComposerEqualPrefix)
+        #:poetPrefix (ly:output-def-lookup layout 'poetPrefix)
+        #:composerPrefix (ly:output-def-lookup layout 'composerPrefix)
+        #:translationAuthorPrefix (ly:output-def-lookup layout 'translationAuthorPrefix)
+        #:pronunciationPrefix (ly:output-def-lookup layout 'pronunciationPrefix)
+        #:compositionPrefix (ly:output-def-lookup layout 'compositionPrefix)
+        #:adaptionTextPrefix (ly:output-def-lookup layout 'adaptionTextPrefix)
+        #:adaptionMusicPrefix (ly:output-def-lookup layout 'adaptionMusicPrefix)
+        #:bridgePrefix (ly:output-def-lookup layout 'bridgePrefix)
+        #:interludePrefix (ly:output-def-lookup layout 'interludePrefix)
+        #:refPrefix (ly:output-def-lookup layout 'refPrefix))
       (list #f #f)
     )
   )
 
   (interpret-markup layout props
-    (if (chain-assoc-get 'page:is-bookpart-last-page props #f)
     (let* ((authors (chain-assoc-get 'header:authors props #f))
            (poet-and-composers (poet-and-composer-from-authors authors))
            (songId (chain-assoc-get 'header:songId props #f))
@@ -164,7 +145,7 @@
             (translation (chain-assoc-get 'header:translation props #f))
             (pronunciation (chain-assoc-get 'header:pronunciation props #f))
             (year_text (if (string? (car poet-and-composers)) #f (chain-assoc-get 'header:year_text props #f)))
-            (year_melody (if (string? (car poet-and-composers)) #f (chain-assoc-get 'header:year_melody props #f))))
+            (year_melody (if (string? (cadr poet-and-composers)) #f (chain-assoc-get 'header:year_melody props #f))))
             (markup
               #:override (cons 'songinfo:poet-maybe-with-composer
                 (if (and poet-maybe-with-composer (not (and (string? poet-maybe-with-composer) (string-null? poet-maybe-with-composer)))) poet-maybe-with-composer #f))
@@ -186,10 +167,25 @@
               #:fontsize songInfoFontSize
               #:sans
               (ly:output-def-lookup layout 'songinfoMarkup)
-            )))
-      (make-null-markup)))
+            ))))
 )
 
+% Songinfo im Footer, nur auf der letzten Seite des Bookparts. Gibt es
+% eingebettete Lieder (siehe embedded_songs.ily), steht hier die Songinfo des
+% letzten eingebetteten Lieds, ausser im Header ist footersong gesetzt
+% (##f = Hauptlied, oder ein mit \captureSong gesichertes Lied).
+#(define-markup-command (print-songinfo layout props) ()
+  (if (chain-assoc-get 'page:is-bookpart-last-page props #f)
+    (let* ((footersong (chain-assoc-get 'header:footersong props 'auto))
+           (embedded (embedded-song-list (chain-assoc-get 'header:embeddedsongs props '())))
+           (song (if (eq? footersong 'auto)
+                     (and (pair? embedded) (last embedded))
+                     footersong)))
+      (interpret-markup layout
+        (if (module? song) (header-module->props song props) props)
+        (make-songinfo-content-markup)))
+    (interpret-markup layout props (make-null-markup))))
+
 #(define-markup-command (print-pagenumber layout props)()
   (let ((label (chain-assoc-get 'header:myindexlabel props #f)))
    (interpret-markup layout props
@@ -206,22 +202,32 @@
       `(line-width . ,(* (chain-assoc-get 'header:songinfo-size-factor props songInfoLineWidthFraction) (ly:output-def-lookup layout 'line-width)))
       arg)))
 
+#(define pdf-encode (@@ (lily framework-ps) pdf-encode))
+% PDF tags
+#(define-markup-command (page-number-to-pdf-label layout props) ()
+     (ly:make-stencil
+      (list 'embedded-ps
+             (ly:format
+              "[ /Label (~a) /PAGELABEL pdfmark\n" (pdf-encode (chain-assoc-get 'page:page-number-string props "?"))))
+      empty-interval empty-interval
+      ))
+
 \paper {
   print-first-page-number = ##t
   first-page-number = #0
 
   oddFooterMarkup = \markup {
     \fill-line {
-      \line { \null }
-      \line { \general-align #Y #DOWN \fractional-line-width \print-songinfo }
+      \line { \page-number-to-pdf-label \null }
+      \line { \if \on-last-page-of-part \general-align #Y #DOWN \fractional-line-width \print-songinfo }
       \line { \if \should-print-page-number \print-pagenumber }
     }
   }
   evenFooterMarkup  = \markup {
     \fill-line {
       \line { \if \should-print-page-number \print-pagenumber }
-      \line { \general-align #Y #DOWN \fractional-line-width \print-songinfo }
-      \line { \null }
+      \line { \if \on-last-page-of-part \general-align #Y #DOWN \fractional-line-width \print-songinfo }
+      \line { \page-number-to-pdf-label \null }
     }
   }
-}
+}

private_includes/base/include_from_song.ily

@@ -0,0 +1,15 @@
+includeFromSong =
+#(define-void-function (filename) (string?)
+  (let ((noDefaultOutputBackup noDefaultOutput))
+    (set! noDefaultOutput #t)
+    (ly:parser-parse-string (ly:parser-clone)
+      (ly:format "\\include \"~a\""
+      (string-append
+        (dirname (dirname (dirname (dirname (current-filename)))))
+        file-name-separator-string
+        "lilypond-song-includes"
+        file-name-separator-string
+        "liedbausteine"
+        file-name-separator-string
+        filename)))
+    (set! noDefaultOutput noDefaultOutputBackup)))

private_includes/base/inline_score.ily

@@ -6,3 +6,8 @@ inline-score =
     #{
       \transposable #TRANSPOSITION #music
     #})
+
+fill-midi =
+#(define-void-function (music) (ly:music?)
+   (set! INLINESCOREMUSIC #{ \INLINESCOREMUSIC #music #})
+)

private_includes/base/markup_tag_groups_hack.ily

@@ -0,0 +1,16 @@
+% We have to record the tag groups for markup, so we use the right tag groups during markup interpretiton.
+recordedTagGroups = #'()
+
+tagGroup =
+#(define-void-function (tags) (symbol-list?)
+   (let ((err (define-tag-group tags)))
+     (if err (ly:parser-error err (*location*))
+         (set! recordedTagGroups (cons tags recordedTagGroups)))))
+
+#(define-markup-command (handle-tag-groups layout props recorded-groups m) (list? markup?)
+   (resetTagGroups)
+   (for-each
+     (lambda (group)
+       (define-tag-group group))
+     recorded-groups)
+   (interpret-markup layout props m))

private_includes/base/merge_rests_engraver_override.ily

@@ -0,0 +1,86 @@
+Better_Merge_rests_engraver =
+#(lambda (context)
+  (define (has-one-or-less? lst) (or (null? lst) (null? (cdr lst))))
+  (define (has-at-least-two? lst) (not (has-one-or-less? lst)))
+  (define (all-equal? lst pred)
+    (or (has-one-or-less? lst)
+        (and (pred (car lst) (cadr lst)) (all-equal? (cdr lst) pred))))
+  (define (measure-count-eqv? a b)
+    (eqv?
+     (ly:grob-property a 'measure-count)
+     (ly:grob-property b 'measure-count)))
+
+  (define (rests-all-unpitched? rests)
+    "Returns true when all rests do not override the staff-position grob
+    property. When a rest has a position set we do not want to merge rests at
+    that position."
+    (every (lambda (rest) (null? (ly:grob-property rest 'staff-position))) rests))
+
+  (define (less-by-layer a b)
+    (<
+      (ly:grob-property b 'layer 0)
+      (ly:grob-property a 'layer 0)))
+
+  (define (merge-mmrests mmrests)
+    "Move all multimeasure rests to the single voice location."
+    (if (all-equal? mmrests measure-count-eqv?)
+        (begin
+          (for-each
+           (lambda (rest) (ly:grob-set-property! rest 'direction CENTER))
+           mmrests)
+          (for-each
+           (lambda (rest) (ly:grob-set-property! rest 'transparent #t))
+           (cdr (sort mmrests less-by-layer))))))
+
+  (define (merge-rests rests)
+    (for-each
+     (lambda (rest) (ly:grob-set-property! rest 'staff-position 0))
+     rests)
+    (for-each
+     (lambda (rest) (ly:grob-set-property! rest 'transparent #t))
+     (cdr (sort rests less-by-layer))))
+
+  (let ((mmrests '())
+        (rests '())
+        (dots '()))
+    (make-engraver
+     ((start-translation-timestep translator)
+      (set! rests '())
+      (set! mmrests '())
+      (set! dots '()))
+     (acknowledgers
+      ((dot-column-interface engraver grob source-engraver)
+       (if (not (ly:context-property context 'suspendRestMerging #f))
+           (set!
+            dots
+            (append (ly:grob-array->list (ly:grob-object grob 'dots))
+                    dots))))
+      ((rest-interface engraver grob source-engraver)
+       (cond
+        ((ly:context-property context 'suspendRestMerging #f)
+         #f)
+        ((grob::has-interface grob 'multi-measure-rest-interface)
+         (set! mmrests (cons grob mmrests)))
+        (else
+         (set! rests (cons grob rests))))))
+     ((stop-translation-timestep translator)
+      (let (;; get a list of the rests 'duration-lengths, 'duration-log does
+            ;; not take dots into account
+            (durs
+             (map
+              (lambda (g)
+                (ly:duration->moment
+                 (ly:prob-property
+                  (ly:grob-property g 'cause)
+                  'duration)))
+              rests)))
+        (if (and
+             (has-at-least-two? rests)
+             (all-equal? durs equal?)
+             (rests-all-unpitched? rests))
+            (begin
+              (merge-rests rests)
+              ;; ly:grob-suicide! works nicely for dots, as opposed to rests.
+              (if (pair? dots) (for-each ly:grob-suicide! (cdr dots)))))
+        (if (has-at-least-two? mmrests)
+            (merge-mmrests mmrests)))))))

private_includes/base/scm/yaml_parser.scm

@@ -0,0 +1,154 @@
+(use-modules (ice-9 rdelim) (ice-9 regex) (ice-9 pretty-print) (srfi srfi-1))
+
+;; Hauptparsingfunktion
+(define (yml-file->scm filename)
+
+  ;; Utility: Zeile einlesen
+  (define (read-lines filename)
+    (call-with-input-file filename
+      (lambda (port)
+        (let loop ((lines '()))
+          (let ((line (read-line port)))
+            (if (eof-object? line)
+                (reverse lines)
+                (let ((clean (string-trim line)))
+                  (if (or (string=? clean "---") (string-null? clean))
+                      (loop lines) ;; Ignoriere "---" oder leere Zeile
+                      (loop (cons line lines))))))))))
+
+  ;; Einrückung bestimmen (Anzahl Leerzeichen am Anfang)
+  (define (line-indent line)
+    (let ((match (string-match "^ *" line)))
+      (if match
+          (match:end match)  ; Anzahl der Leerzeichen = Position nach Leerzeichen
+          0)))               ; Falls kein Match → 0
+
+  ;; Kommentar entfernen
+  (define (strip-comment line)
+    (let ((m (string-match "#.*" line)))
+      (if m
+          (string-trim-right (string-take line (match:start m)))
+          line)))
+
+  ;; Hilfsfunktion: Whitespace entfernen
+  (define (clean-line line)
+    (string-trim (strip-comment line)))
+
+  ;; Ist Zeile leer (nach Entfernen von Kommentar & Whitespace)?
+  (define (blank-or-comment? line)
+    (string-null? (clean-line line)))
+
+  ;; Skalare Werte interpretieren
+  (define (parse-scalar str)
+    (define (strip-quotes s)
+      (cond
+       ((and (string-prefix? "\"" s) (string-suffix? "\"" s))
+        (string-drop-right (string-drop s 1) 1))
+       ((and (string-prefix? "'" s) (string-suffix? "'" s))
+        (string-drop-right (string-drop s 1) 1))
+       (else s)))
+    (let ((s (strip-quotes (string-trim str))))
+      (cond
+       ((string=? s "{}") '())  ;; leere Map
+       ((string=? s "[]") '())  ;; leere Liste
+       ((string-match "^[0-9]+$" s) (string->number s))
+       ((string=? s "true") #t)
+       ((string=? s "false") #f)
+       ((string=? s "null") '())
+       (else s))))
+
+
+  ;; Hilfsfunktion: Zeilen mit gleicher oder höherer Einrückung sammeln
+  (define (take-indented lines min-indent)
+    (let loop ((ls lines) (acc '()))
+      (if (null? ls)
+          (reverse acc)
+          (let ((line (car ls)))
+            (if (or (blank-or-comment? line)
+                    (>= (line-indent line) min-indent))
+                (loop (cdr ls) (cons line acc))
+                (reverse acc))))))
+
+  ;; Hilfsfunktion: N Zeilen überspringen
+  (define (drop lst n)
+    (let loop ((l lst) (i n))
+      (if (or (zero? i) (null? l))
+          l
+          (loop (cdr l) (- i 1)))))
+
+  ;; Listenparsing: Liest Zeilen mit `-` als Listeneinträge
+  (define (parse-list lines current-indent)
+    (let loop ((ls lines) (result '()))
+      (if (null? ls)
+          (reverse result)
+          (let* ((line (clean-line (car ls))))
+            (if (string-match "^-" line)
+                (let* ((indent (line-indent (car ls)))
+                       (item-str (string-trim (string-drop line 1)))
+                       (next-lines (cdr ls)))
+                  (if (or (null? next-lines)
+                          (> (line-indent (car next-lines)) indent))
+                      ;; Verschachtelter Inhalt
+                      (let* ((sub (take-indented next-lines (+ indent 2)))
+                             (parsed (if (null? sub)
+                                         (parse-scalar item-str)
+                                         (parse-lines sub (+ indent 2))))
+                             (remaining (drop next-lines (length sub))))
+                        (loop remaining (cons parsed result)))
+                      ;; Einfacher Skalar
+                      (loop next-lines (cons (parse-scalar item-str) result))))
+                ;; Nicht mehr Teil der Liste
+                (reverse result))))))
+
+  ;; Hauptparser für Key-Value oder Listen
+  (define (parse-lines lines current-indent)
+    (let loop ((ls lines) (result '()))
+      (if (null? ls)
+          (reverse result)
+          (let* ((raw-line (car ls))
+                 (line (clean-line raw-line)))
+            (cond
+             ;; Kommentar oder leere Zeile
+             ((blank-or-comment? raw-line)
+              (loop (cdr ls) result))
+
+             ;; Liste
+             ((string-match "^- " line)
+              (let ((list-lines (take-indented ls current-indent)))
+                (let ((parsed-list (parse-list list-lines current-indent)))
+                  (loop (drop ls (length list-lines))
+                        (cons parsed-list result)))))
+
+             ;; Key: Value
+             ((string-match "^[^:]+:" line)
+              (let* ((kv (string-split line #\:))
+                     (key (string-trim (car kv)))
+                     (value-str (string-trim (string-join (cdr kv) ":")))
+                     (next-lines (cdr ls)))
+                (if (string-null? value-str)
+                    ;; Wert auf nachfolgender Einrückungsebene
+                    (let* ((sub (take-indented next-lines (+ current-indent 2)))
+                           (parsed (parse-lines sub (+ current-indent 2)))
+                           (remaining (drop next-lines (length sub))))
+                      (loop remaining
+                            (cons (cons key parsed) result)))
+                    ;; Einfacher Key:Value
+                    (loop next-lines
+                          (cons (cons key (parse-scalar value-str)) result)))))
+
+             ;; Fehlerhafte Zeile
+             (else
+               ;; Vermeide Fehlermeldung für Leerzeilen oder leere Objekte
+               (if (or (string-null? (string-trim line))
+                       (member line '("{}" "[]")))
+                   (loop (cdr ls) result)
+                   (begin
+                     (format (current-error-port)
+                             "Syntaxfehler: Ungültige Zeile: ~a\n" raw-line)
+                     (loop (cdr ls) result))))
+             )))))
+
+  (let ((lines (read-lines filename)))
+    (parse-lines lines 0)))
+
+(define (parse-yml-file filename) (resolve-inherits (yml-file->scm filename)))

private_includes/base/swing_style.ily

@@ -0,0 +1,121 @@
+swing = \textMark \markup {
+  \line \general-align #Y #DOWN {
+    \score {
+      \new Staff \with {
+        fontSize = #-2
+        \override StaffSymbol.line-count = #0
+%        \override VerticalAxisGroup.Y-extent = #'(0 . 0)
+      }
+      \relative {
+        \stemUp
+        \override Score.SpacingSpanner.common-shortest-duration = #(ly:make-moment 3 16)
+        \override Beam.positions = #'(2 . 2)
+        h'8[ h8]
+      }
+      \layout {
+        ragged-right= ##t
+        indent = 0
+        \context {
+          \Staff \remove "Clef_engraver"
+          \remove "Time_signature_engraver"
+        }
+      }
+    }
+    " ="
+    \score {
+      \new Staff \with {
+        fontSize = #-2
+        \override StaffSymbol.line-count = #0
+%        \override VerticalAxisGroup.Y-extent = #'(0 . 0)
+      }
+      \relative {
+        \stemUp
+        \override Score.SpacingSpanner.common-shortest-duration = #(ly:make-moment 3 16)
+        \override Stem.length = #4.5
+        \tuplet 3/2 { h'4 h8 }
+      }
+      \layout {
+        ragged-right= ##t
+        indent = 0
+        \context {
+          \Staff
+          \remove "Clef_engraver"
+          \remove "Time_signature_engraver"
+        }
+      }
+    }
+  }
+}
+
+swingOff = \textMark \markup {
+  \line \general-align #Y #DOWN {
+    \score {
+      \new Staff \with {
+        fontSize = #-2
+        \override StaffSymbol.line-count = #0
+%        \override VerticalAxisGroup.Y-extent = #'(0 . 0)
+      }
+      \relative {
+        \stemUp
+        \override Score.SpacingSpanner.common-shortest-duration = #(ly:make-moment 3 16)
+        \override Beam.positions = #'(2 . 2)
+        h'8[ h8]
+      }
+      \layout {
+        ragged-right= ##t
+        indent = 0
+        \context {
+          \Staff \remove "Clef_engraver"
+          \remove "Time_signature_engraver"
+        }
+      }
+    }
+    " ="
+    \score {
+      \new Staff \with {
+        fontSize = #-2
+        \override StaffSymbol.line-count = #0
+%        \override VerticalAxisGroup.Y-extent = #'(0 . 0)
+      }
+      \relative {
+        \stemUp
+        \override Score.SpacingSpanner.common-shortest-duration = #(ly:make-moment 3 16)
+        \override Beam.positions = #'(2 . 2)
+        h'8 [h8]
+      }
+      \layout {
+        ragged-right= ##t
+        indent = 0
+        \context {
+          \Staff
+          \remove "Clef_engraver"
+          \remove "Time_signature_engraver"
+        }
+      }
+    }
+  }
+}
+
+\include "swing.ly"
+
+swingMusic =
+#(define-music-function (music) (ly:music?)
+  (define (partial-duration-length m)
+    (let ((name (ly:music-property m 'name))
+          (es (ly:music-property m 'elements))
+          (e (ly:music-property m 'element)))
+      (if (pair? es)
+        (partial-duration-length (car es))
+        (if (ly:music? e)
+          (if (and (eq? name 'ContextSpeccedMusic) (eq? (ly:music-property e 'name) 'PartialSet))
+            (ly:duration->moment (ly:music-property e 'duration))
+            (if (eq? name 'NoteEvent)
+              ZERO-MOMENT
+              (partial-duration-length e)
+            )
+          )
+          ZERO-MOMENT))))
+#{
+  \swing
+  \applySwingWithOffset 8 #'(2 1) #(partial-duration-length music) #music
+#})

private_includes/base/title_with_category_images.ily

@@ -0,0 +1,91 @@
+#(define-markup-command (bookTitleMarkupCustom layout props)()
+   (interpret-markup layout props
+     (make-column-markup
+       (list
+         (make-vspace-markup (chain-assoc-get 'header:titletopspace props 0))
+         (make-customEps-markup (chain-assoc-get 'header:titlesize props 3.5) "titel.eps")
+     ))
+))
+
+#(define-markup-command (category-image layout props size category)(number? string?)
+   (interpret-markup layout props
+     (if noStandaloneOutput
+       (make-epsfileref-markup Y size
+         (category-image-path category))
+       (make-epsfile-markup Y size
+         (category-image-path category)))))
+
+#(define showCategoryImages (if (defined? 'showCategoryImages) showCategoryImages #t))
+
+#(define-markup-command (category-images layout props)()
+   (interpret-markup layout props
+     (if showCategoryImages
+       (make-line-markup (map (lambda (category) (make-category-image-markup 5 category))
+           (string-tokenize (chain-assoc-get 'header:categories props ""))))
+       (make-null-markup))))
+
+#(define pdf-encode (@@ (lily framework-ps) pdf-encode))
+% PDF tags
+% Erzeugt ein PDF-Lesezeichen (Outline-Eintrag) auf der aktuellen Seite.
+% count = Anzahl der direkten Unterpunkte, die (in Seitenreihenfolge) direkt
+%   nachfolgen. 0 = Blatt-Eintrag (kein /Count), >0 = aufgeklappt,
+%   <0 = zugeklappt (Betrag = Anzahl direkter Kinder).
+#(define (make-pdf-toc-stencil title count)
+  (if (string-null? title)
+     empty-stencil
+     (ly:make-stencil
+      (list 'embedded-ps
+             (ly:format
+              "[~a/Action /GoTo /View [/XYZ -4 currentpagedevice /PageSize get 1 get 4 add null] /Title (~a) /OUT pdfmark"
+              (if (= count 0) "" (ly:format "/Count ~a " count))
+              (pdf-encode title)))
+      empty-interval empty-interval
+      ;'(0 . 0) '(0 . 0)
+      )))
+
+% Einzelner (Blatt-)Eintrag im PDF-Inhaltsverzeichnis.
+#(define-markup-command (title-to-pdf-toc layout props title) (string?)
+  (make-pdf-toc-stencil title 0))
+
+% Kapitel-Eintrag mit verschachtelten Unterpunkten.
+% count = Anzahl der direkt nachfolgenden Einträge, die diesem Kapitel
+%   untergeordnet werden sollen (positiv = aufgeklappt, negativ = zugeklappt).
+#(define-markup-command (chapter-to-pdf-toc layout props count title) (integer? string?)
+  (make-pdf-toc-stencil title count))
+
+#(define-markup-command (build-full-title layout props right)(boolean?)
+   (interpret-markup layout (prepend-alist-chain 'songfilename (chain-assoc-get 'header:songfilename props "") props)
+     (let* ((title (chain-assoc-get 'header:title props ""))
+            (starttext (chain-assoc-get 'header:starttext props #f))
+            (pdfbookmark (if starttext (string-append starttext " | " title) title))
+            (chaptertitle (chain-assoc-get 'header:chaptertitle props #f))
+            (chaptercount (chain-assoc-get 'header:chaptercount props 0))
+            (title-markup (ly:output-def-lookup layout (if right 'oddTitleLineMarkup 'evenTitleLineMarkup))))
+     (if title
+       ;; Ist dieses Lied das erste eines Kapitels, wird der Kapitel-Eintrag
+       ;; unmittelbar vor dem Lied-Eintrag ausgegeben, damit die pdfmark-/OUT-
+       ;; Reihenfolge (Elternteil vor Kindern) im PDF-Stream garantiert stimmt.
+       ;; Eingebettete Lieder (embedded_songs.ily) folgen direkt nach dem Lied.
+       (if (and (string? chaptertitle) (not (string-null? chaptertitle)))
+         (markup #:chapter-to-pdf-toc chaptercount chaptertitle
+                 #:title-to-pdf-toc pdfbookmark #:embedded-songs-to-pdf-toc title-markup)
+         (markup #:title-to-pdf-toc pdfbookmark #:embedded-songs-to-pdf-toc title-markup))
+       make-null-markup)
+     )))
+
+\paper {
+  bookTitleMarkup = \markup \null
+  scoreTitleMarkup = \markup \null
+  oddHeaderMarkup = \markup { \if \on-first-page-of-part \build-full-title ##t }
+  evenHeaderMarkup = \markup { \if \on-first-page-of-part \build-full-title ##f }
+  oddTitleLineMarkup = \markup { \fill-line \general-align #Y #UP { \null \bookTitleMarkupCustom \category-images } }
+  evenTitleLineMarkup = \markup { \fill-line \general-align #Y #UP { \category-images \bookTitleMarkupCustom \null } }
+  defaultTitleMarkup = \markup {
+    \override #'(baseline-skip . 3.5)
+    \center-column {
+      \override #`(font-name . ,songTitleFont) { \fontsize #songTitleSize \fromproperty #'header:title }
+      \large \bold \fromproperty #'header:subtitle
+      \smaller \bold \fromproperty #'header:subsubtitle
+    }
+  }
+}

private_includes/base/transposition.ily

@@ -2,7 +2,12 @@ TRANSPOSITION = #(cons #f #f)
 
 transposeGlobal =
 #(define-void-function (from to) (ly:pitch? ly:pitch?)
-   (set! TRANSPOSITION (cons from to)))
+   (if (not (car TRANSPOSITION))
+       (set! TRANSPOSITION (cons from to))
+       (let ((current_to (cdr TRANSPOSITION))
+             (interval (ly:pitch-diff to from)))
+         (set! TRANSPOSITION (cons (car TRANSPOSITION) 
+                                    (ly:pitch-transpose current_to interval))))))
 
 transposable =
 #(define-music-function (fromto music) (pair? ly:music?)

private_includes/base/verses_with_chords.ily

@@ -60,19 +60,20 @@
 
 % Text über Text mittig darstellen
 #(define-markup-command (textup layout props text uptext) (markup? markup?)
+   #:properties ((verselayout generalLayout)
+                 (verse-text-chord-distance songTextChordDistance))
    "Markup über Text mittig darstellen."
-   (let ((verselayout (chain-assoc-get 'verselayout props generalLayout)))
    (interpret-markup layout props
      #{\markup {
        \size-box-to-box-style-dependent ##t ##f
-         \general-align #X #LEFT \override #`(direction . ,UP) \override #'(baseline-skip . 1.0) \dir-column \chord-alignment-style-dependent {
-           \pad-to-box #'(0 . 0) #'(0 . 2.0) { #text }
-           \size-box-to-box ##f ##t #uptext \score { \chords { g4:m a } \layout { \verselayout } }
+         \general-align #X #LEFT \override #`(direction . ,UP) \override #'(baseline-skip . 1) \dir-column \chord-alignment-style-dependent {
+           \pad-to-box #'(0 . 0) #`(0 . ,(- verse-text-chord-distance 0.8)) { #text }
+           \size-box-to-box ##f ##t #uptext \score { \chords { g4:m a } \layout { $verselayout #(customized-layout verselayout) } }
          }
          #text
        }
      #}
-   )))
+   ))
 
 #(define-markup-command (anchor-x-between layout props arga argb)
    (markup? markup?)
@@ -82,16 +83,15 @@
             (ly:stencil-aligned-to m X (- (/ (* la 2) l) 1))
      ))
 
-#(define-markup-command (stanza-raw layout props arg)
-   (string-or-music?)
-   (let ((verselayout (chain-assoc-get 'verselayout props generalLayout)))
+#(define-markup-command (stanza-raw layout props arg) (string-or-music?)
+   #:properties ((verselayout generalLayout))
    (interpret-markup layout props
      (if (and (string? arg) (string-null? arg))
          " "
          #{\markup
-           \score { \new Lyrics { \lyricmode { #(if (ly:music? arg) arg #{ \set stanza = #arg #}) "" } } \layout { \verselayout } }
+           \score { \new Lyrics { \lyricmode { #(if (ly:music? arg) arg #{ \stanza #arg #}) "" } } \layout { $verselayout #(customized-layout verselayout) } }
          #}
-     ))))
+     )))
 
 #(define-markup-command (stanza layout props arg)
    (string-or-music?)
@@ -141,7 +141,7 @@
        (make-wrap-newline-markup
                (ly:regex-replace (ly:make-regex "\\(( *)([^,()]*)( *),([^)]*)\\)")
                  (ly:regex-replace (ly:make-regex "(([^ \n]*\\([^()]*,[^()]+\\)[^ \n(]*)+)") (handle-custom-newlines custom-verse-breaks verse) " \\concat { " 1 " } ")
-                "\\textup \\line { \"" 1 "\" " 2 " \"" 3 "\" } \\score { " transp " \\chords { s4 " 4 " } \\layout { \\verselayout } }")
+                "\\textup \\line { \"" 1 "\" " 2 " \"" 3 "\" } \\score { " transp " \\chords { s4 " 4 " } \\layout { $verselayout #(customized-layout verselayout) } }")
                 )
      ))))
 
@@ -203,32 +203,32 @@
 
 #(define-markup-command (pad-left layout props amount arg)
   (number? markup?)
-  (let* ((m (interpret-markup layout props arg))
-         (x (ly:stencil-extent m X))
-         (y (ly:stencil-extent m Y)))
     (ly:stencil-translate
-      (ly:make-stencil (ly:stencil-expr m)
-                       (cons (- (car x) amount) (cdr x))
-                       y)
-      `(,amount . 0))))
+      (interpret-markup layout props (make-pad-x-left-markup amount arg))
+      `(,amount . 0)))
 
-#(define-markup-command (pad-right layout props amount arg)
-  (number? markup?)
-  (let* ((m (interpret-markup layout props arg))
-         (x (ly:stencil-extent m X))
-         (y (ly:stencil-extent m Y)))
-      (ly:make-stencil (ly:stencil-expr m)
-                       (cons (car x) (+ (cdr x) amount))
-                       y)))
-
-#(define-markup-command (score-equal-height layout props reference-height lines)
-  (number? markup-list?)
+#(define-markup-command (score-equal-height-with-indents layout props lines)
+  (markup-list?)
   #:category music
-  #:properties ((baseline-skip))
-    (stack-stencils Y DOWN baseline-skip
-      (map
-        (lambda (line) (ly:make-stencil (ly:stencil-expr line) (ly:stencil-extent line X) `(,(/ reference-height -2.0) . ,(/ reference-height 2.0))))
-        (interpret-markup-list layout props lines))))
+  #:properties ((intraverse-vspace 0)
+                (verse-line-height songTextLineHeigth)
+                (line-indents '()))
+    (let ((indents-max-index (- (length line-indents) 1)))
+      (stack-stencils Y DOWN intraverse-vspace
+        (index-map
+          (lambda (index line)
+            (let ((stil
+                    (ly:make-stencil
+                      (ly:stencil-expr line)
+                      (ly:stencil-extent line X)
+                      `(,(/ verse-line-height -2.0) . ,(/ verse-line-height 2.0)))))
+              (if (<= index indents-max-index)
+                (ly:stencil-translate-axis
+                  stil
+                  (list-ref line-indents index)
+                  X)
+                stil)))
+          (interpret-markup-list layout props lines)))))
 
 #(define-public (custom-lyric-text::print grob)
   "Allow interpretation of tildes as lyric tieing marks."
@@ -236,37 +236,171 @@
   (let ((text (ly:grob-property grob 'text)))
 
     (grob-interpret-markup grob (if (string? text)
-                                    (make-pad-right-markup -0.1 (make-tied-lyric-markup text))
+                                    (make-pad-x-right-markup -0.1 (make-tied-lyric-markup text))
                                     text))))
 
+Chord_lyrics_spacing_engraver =
+#(lambda (ctx)
+   (let ((last-lyric-syllable #f)
+         (lyric-width-since-last-chord 0)
+         (music-columns-for-last-syllable 0)
+         (last-printed-chord #f)
+         (chord-width-since-last-lyric 0)
+         (lyrics-seen-since-break #f)
+         (have-a-rest #f)
+         (stanza #f)
+         ; Akkord auf einer Skip-Silbe "_" nach Wortende soll über die folgende Silbe
+         (word-continues #f)
+         (continuation-this-step #f)
+         (lyric-skip-this-step #f)
+         (syllable-this-step #f)
+         (chord-this-step #f)
+         (chord-on-lyric-skip #f)
+         (place-at-right-edge
+          (lambda (grob anchor padding)
+            (let ((anchor-width (interval-length (ly:grob-extent anchor anchor X))))
+              (ly:grob-set-parent! grob X anchor)
+              (ly:grob-set-property! grob 'X-offset (+ padding anchor-width))
+              ))))
+     (make-engraver
+      ((start-translation-timestep engraver)
+       (set! continuation-this-step #f)
+       (set! lyric-skip-this-step #f)
+       (set! syllable-this-step #f)
+       (set! chord-this-step #f)
+       )
+      ((stop-translation-timestep engraver)
+       (if (and chord-on-lyric-skip (not (eq? chord-on-lyric-skip chord-this-step)))
+           (begin
+             (if (and syllable-this-step (not chord-this-step))
+                 (begin
+                   (ly:grob-set-parent! chord-on-lyric-skip X syllable-this-step)
+                   (ly:grob-set-property! chord-on-lyric-skip 'X-offset 0)
+                   (ly:grob-set-property! chord-on-lyric-skip 'extra-spacing-width '(+inf.0 . -inf.0))
+                   (set! lyric-width-since-last-chord (interval-length (ly:grob-extent syllable-this-step syllable-this-step X)))))
+             (set! chord-on-lyric-skip #f)))
+       (if syllable-this-step
+           (set! word-continues continuation-this-step))
+       )
+      (listeners
+       ((multi-measure-rest-event engraver event)
+        (set! have-a-rest #t)
+        )
+       ((rest-event engraver event)
+        (set! have-a-rest #t)
+        )
+       ((hyphen-event engraver event)
+        (set! continuation-this-step #t)
+        )
+       ((extender-event engraver event)
+        (set! continuation-this-step #t)
+        )
+       ((lyric-event engraver event)
+        (set! have-a-rest #f)
+        ; "_" wird zu " " und erzeugt keine LyricText
+        (if (equal? (ly:event-property event 'text) " ")
+            (begin
+              (set! lyric-skip-this-step #t)
+              (set! chord-on-lyric-skip #f)))
+        (set! music-columns-for-last-syllable 0)
+        )
+       ((break-event engraver event)
+        (set! last-lyric-syllable #f)
+        (set! lyric-width-since-last-chord 0)
+        (set! music-columns-for-last-syllable 0)
+        (set! last-printed-chord #f)
+        (set! chord-width-since-last-lyric 0)
+        (set! lyrics-seen-since-break #f)
+        (set! chord-on-lyric-skip #f)
+        ))
+      (acknowledgers
+       ((musical-paper-column-interface this-engraver grob source-engraver)
+        (set! music-columns-for-last-syllable (+ 1 music-columns-for-last-syllable))
+        )
+       ((lyric-syllable-interface this-engraver grob source-engraver)
+        (let ((syllable-width (interval-length (ly:grob-extent grob grob X))))
+          (set! lyric-width-since-last-chord (+ lyric-width-since-last-chord syllable-width))
+          )
+        (if (> chord-width-since-last-lyric 0)
+            (if lyrics-seen-since-break
+                (ly:grob-set-property! grob 'extra-spacing-width
+                                       (cons (- chord-width-since-last-lyric) (cdr (ly:grob-property grob 'extra-spacing-width '(0 . 0)))))
+                (if last-printed-chord
+                  (let ((gap-for-starting-rest 2.0))
+                    (if stanza (ly:grob-set-property! stanza 'padding (+ 1 gap-for-starting-rest)))
+                    (ly:grob-set-parent! grob X last-printed-chord)
+                    (ly:grob-set-property! grob 'X-offset gap-for-starting-rest)
+                    )))
+            )
+        (set! syllable-this-step grob)
+        (set! last-lyric-syllable grob)
+        (set! chord-width-since-last-lyric 0)
+        (set! lyrics-seen-since-break #t)
+        )
+       ((chord-name-interface this-engraver grob source-engraver)
+        (if (not (and
+                  (boolean? (ly:grob-property grob 'begin-of-line-visible))
+                  (ly:grob-property grob 'begin-of-line-visible)
+                  lyrics-seen-since-break))
+            (let* ((last-printed-chord-width (if last-printed-chord (interval-length (ly:grob-extent last-printed-chord last-printed-chord X)) 0))
+                   (chord-overwidth (- last-printed-chord-width lyric-width-since-last-chord))
+                   (chord-gap 0.5))
+              (if have-a-rest
+                  (let ((chord-width (interval-length (ly:grob-extent grob grob X))))
+                    (if last-lyric-syllable
+                        (if (and last-printed-chord (> chord-overwidth 0))
+                          (place-at-right-edge grob last-printed-chord chord-gap)
+                          (place-at-right-edge grob last-lyric-syllable 0))
+                        (if last-printed-chord
+                            (place-at-right-edge grob last-printed-chord chord-gap)))
+                    (set! chord-width-since-last-lyric (+ chord-width-since-last-lyric chord-width chord-gap))
+                    ))
+              (if (and last-lyric-syllable last-printed-chord (> chord-overwidth 0))
+                      (ly:grob-set-property! last-lyric-syllable 'extra-spacing-width
+                                             (cons (car (ly:grob-property last-lyric-syllable 'extra-spacing-width '(0 . 0))) (+ chord-gap chord-overwidth)))
+                      )
+              (set! lyric-width-since-last-chord (* (if last-lyric-syllable (interval-length (ly:grob-extent last-lyric-syllable last-lyric-syllable X)) 0) (- 1 (/ 1.0 music-columns-for-last-syllable))))
+              (set! chord-this-step grob)
+              (if (and lyric-skip-this-step (not have-a-rest) (not word-continues))
+                  (set! chord-on-lyric-skip grob))
+              (set! last-printed-chord grob)
+              (set! last-lyric-syllable #f)
+              )
+            (ly:grob-set-property! grob 'X-extent '(+inf.0 . -inf.0))
+            )
+        )
+        ((stanza-number-interface this-engraver grob source-engraver)
+          (set! stanza grob)
+          )
+       )
+      )))
+
 #(define-markup-command (chordlyrics layout props lyrics) (ly:music?)
    #:properties ((verse-chords #{#})
                  (verse-reference-voice #{#})
                  (verse-break-voice #{#})
-                 (verse-line-height songTextLineHeigth)
                  (verse-text-chord-distance songTextChordDistance)
-                 (intraverse-vspace 0)
                  (transposition (cons #f #f))
                  (verselayout generalLayout))
   "Vers mit Akkorden"
   (interpret-markup layout props
     #{
       \markup {
-        \override #`(baseline-skip . ,intraverse-vspace)
-        \score-equal-height #verse-line-height \score-lines {
-          \transposable #transposition
+        \score-equal-height-with-indents \score-lines {
           <<
-            \new Devnull { #verse-break-voice }
-            \new NullVoice = "dummyvoice" { #verse-reference-voice }
-            #(music-clone verse-chords)
+            \new Devnull { #(music-clone verse-break-voice) }
+            \new NullVoice = "dummyvoice" { #(music-clone verse-reference-voice) }
+            \transposable #transposition #(music-clone verse-chords)
             \new Lyrics \lyricsto "dummyvoice" { #lyrics }
           >>
           \layout {
-            \verselayout
+            $verselayout
+            #(customized-layout verselayout)
             ragged-right = ##t
             \context {
               \Lyrics
               \override VerticalAxisGroup.nonstaff-relatedstaff-spacing.basic-distance = #verse-text-chord-distance
+              \override VerticalAxisGroup.nonstaff-relatedstaff-spacing.padding = #(- verse-text-chord-distance songTextChordDistance)
               \override LyricText.parent-alignment-X = #LEFT
               \override LyricText.self-alignment-X = #LEFT
               \override LyricText.word-space = 0.8
@@ -282,13 +416,20 @@
             \context {
               \Score
               \override PaperColumn.keep-inside-line = ##f
-             % \override SpacingSpanner.strict-note-spacing = ##t
+              % \override SpacingSpanner.strict-note-spacing = ##t
               \override SpacingSpanner.uniform-stretching = ##t
               \override SpacingSpanner.spacing-increment = 0
+              % \override SpacingSpanner.packed-spacing = ##t
+              \consists \Chord_lyrics_spacing_engraver
+              % ChordPro engraver in Score context to collect all data
+              \consists \ChordPro_score_collector
               \remove Bar_number_engraver
               \remove Mark_engraver
+              \remove Jump_engraver
               \remove Volta_engraver
               \remove Parenthesis_engraver
+              \remove Metronome_mark_engraver
+              \remove Text_mark_engraver
             }
             \context {
               \Staff
@@ -310,13 +451,7 @@
               \remove Tie_engraver
               \remove Dynamic_engraver
               \remove Note_heads_engraver
-            }
-            \context {
-              \NullVoice
-              \consists Rest_engraver
-              \omit Rest
-             % \undo \omit NoteHead
-             % \hide NoteHead
+              \remove Script_engraver
             }
           }
         }

private_includes/book/appendix.ily

@@ -26,7 +26,7 @@ appendix =
   "call page-ref to appendix-item"
   (interpret-markup layout props
     (markup #:with-link label
-      #:override (cons 'appendixPage (make-page-ref-markup label "XXX" "?"))
+      #:override (cons 'appendixPage (make-page-ref-markup label "888" "?"))
       (ly:output-def-lookup layout 'appendixReferenceMarkup))))
 
 \paper {

private_includes/book/book_include.ily

@@ -1,4 +1,5 @@
 #(define song-list '())
+#(define song-number 0)
 
 #(define (files-in-directory dirname)
       ;;; Generate list containing filenames
@@ -9,7 +10,7 @@
     	     (closedir dir)
     	     files)
     	    (else
-    	     (next (readdir dir) (if (string-match "^(0|\\.)" f) files (cons f files))))))))
+    	     (next (readdir dir) (if (ly:regex-match? (ly:regex-exec (ly:make-regex "^(0|\\.)") f)) files (cons f files))))))))
 
 #(define (file-to-stats filename)
    (set! song-list (cons filename song-list)))
@@ -64,7 +65,10 @@ additionalPageNumbers =
   display-pages-list
 )
 
-
+% TODO:
+% Eigentlich können wir das direkt in oddFooderMarkup und evenFooterMarkup aufrufen
+% vermutlich sogar ohne den delay kram. Wir sollten außerdem einfach nur die property
+% page:page-number-string setzen dann klappts auch mit PDF Seiten
 #(define-markup-command (custom-page-number layout props label real-current-page-number)
   (symbol? number?)
   #:category other
@@ -88,9 +92,10 @@ width may require additional tweaking.)"
         ,(delay (ly:stencil-expr
                  (let* ((display-page (assq-ref (build-display-pages-list layout) label))
                         (real-current-page (if (negative? real-current-page-number) (real-page-number layout label) real-current-page-number))
+                        (number-type (ly:output-def-lookup layout 'page-number-type))
                         (page-markup
                           (if (assq-ref additional-page-switch-label-list label)
-                              (make-concat-markup (list (number-format 'arabic display-page)
+                              (make-concat-markup (list (number-format number-type display-page)
                                 (make-char-markup (+ 97 (- real-current-page (real-page-number layout
                                   (let find-earliest-additional-label
                                        ((rest-additional-page-switch-label-list (member (cons label #t) additional-page-switch-label-list)))
@@ -98,7 +103,7 @@ width may require additional tweaking.)"
                                            (find-earliest-additional-label (cdr rest-additional-page-switch-label-list))
                                            (caar rest-additional-page-switch-label-list)))
                                 ))))))
-                              (number-format 'arabic (+ display-page (- real-current-page (real-page-number layout label))))
+                              (number-format number-type (+ display-page (- real-current-page (real-page-number layout label))))
                           ))
                         (page-stencil (interpret-markup layout props page-markup))
                         (gap (- (interval-length x-ext)
@@ -114,7 +119,7 @@ width may require additional tweaking.)"
 
 
 includeSong =
-#(define-void-function (parser location textproc filename) ((procedure?) string?)
+#(define-void-function (filename) (string?)
      #{
      \bookOutputName #filename
      #}
@@ -125,24 +130,47 @@ includeSong =
         (acons label additional-page-numbers additional-page-switch-label-list))
       (set! song-list
         (acons (string->symbol filename)
-          (acons 'label label (acons 'header HEADER (acons 'music MUSIC (acons 'layout LAYOUT (acons 'text #{ \markuplist \setsongfilename $filename $(if textproc (textproc TEXT) TEXT) #} '())))))
+          `(
+            (label . ,label)
+            (header . ,HEADER)
+            (music . ,MUSIC)
+            (layout . ,LAYOUT)
+            (text-pages . ,(map (lambda (text)
+                      #{ \markuplist \setsongfilename $filename $text #})
+                      TEXT_PAGES))
+          )
           song-list))
     ))
 
 blankpage =
-#(define-void-function (parser location) ()
+#(define-void-function () ()
     (set! song-list
       (acons 'emptyPage
         '()
         song-list)))
 
 imagepage =
-#(define-void-function (parser location xsize filename) (number? string?)
+#(define-void-function (xsize filename) (number? string?)
     (set! song-list
       (acons 'imagePage
-        (acons 'xsize xsize (acons 'filename filename '()))
+        `((xsize . ,xsize)
+          (filename . ,filename))
         song-list)))
 
+markuppage =
+#(define-void-function (mkup) (markup?)
+    (set! song-list
+      (acons 'markupPage
+        `((markup . ,mkup))
+        song-list)))
+
+#(define chapters '())
+
+songsChapter =
+#(define-void-function (title) (string?)
+    (set! chapters
+      (cons (cons title (length song-list)) chapters)))
+
 #(define-markup-command (pagecenter layout props stuff)(markup?)
    (interpret-markup layout props
      (let ((halfpaperheight (/ (ly:output-def-lookup layout 'paper-height) 2))
@@ -151,51 +179,154 @@ imagepage =
    )))
 
 songs =
-#(define-void-function (parser location) ()
+#(define-void-function () ()
+ (let* ((ordered (reverse song-list))
+        (total (length ordered))
+        ;; Ein Lied erzeugt nur dann einen PDF-Outline-Eintrag (/OUT), wenn
+        ;; title oder starttext gesetzt sind (siehe build-full-title). Nur solche
+        ;; Lieder duerfen als Kapitel-Kinder gezaehlt werden -- sonst wird die
+        ;; /Count zu hoch und der erste Folgeeintrag (z.B. ein spaeteres Kapitel)
+        ;; rutscht faelschlich als Kind mit hinein.
+        ;; Eingebettete Lieder (embedded_songs.ily) haben jeweils ein eigenes
+        ;; Lesezeichen, daher die Anzahl statt eines Booleans.
+        (bookmark-count
+          (lambda (e)
+            (if (or (eq? (car e) 'emptyPage)
+                    (eq? (car e) 'imagePage)
+                    (eq? (car e) 'markupPage))
+                0
+                (let* ((headermodule (ly:book-header (assq-ref (cdr e) 'header)))
+                       (vars (extract-and-check-vars-from-module headermodule '(title starttext))))
+                  (+ (if (or (assq-ref vars 'title) (assq-ref vars 'starttext)) 1 0)
+                     (count song-pdf-bookmark-title (embedded-songs-of-header headermodule)))))))
+        (count-bookmark-songs
+          (lambda (start end)
+            (let loop ((i 0) (l ordered) (c 0))
+              (cond ((or (null? l) (>= i end)) c)
+                    ((< i start) (loop (+ i 1) (cdr l) c))
+                    (else (loop (+ i 1) (cdr l) (+ c (bookmark-count (car l)))))))))
+        ;; chapters: (title . start-index). start-index = Anzahl der song-list-
+        ;; Eintraege beim Aufruf von songsChapter = Index in `ordered`, ab dem
+        ;; das Kapitel beginnt.
+        (chapters-asc (sort chapters (lambda (a b) (< (cdr a) (cdr b)))))
+        ;; pending: aufsteigende Liste von (start title count); count = Anzahl
+        ;; der Lesezeichen-Lieder von diesem Kapitel bis zum Beginn des naechsten.
+        (pending
+          (let loop ((chs chapters-asc) (acc '()))
+            (if (null? chs)
+                (reverse acc)
+                (let* ((title (caar chs))
+                       (start (cdar chs))
+                       (end (if (null? (cdr chs)) total (cdadr chs)))
+                       (cnt (count-bookmark-songs start end)))
+                  (loop (cdr chs) (cons (list start title cnt) acc))))))
+        ;; Aktuell aktives Kapitel (Titel-String) waehrend des Durchlaufs. Wird
+        ;; gesetzt, sobald ein Kapitel aktiviert (aus `pending` entfernt) wird --
+        ;; egal ob auf einer Seite (chapter-prefixed-markup) oder auf dem ersten
+        ;; Song. Jeder danach folgende Song erhaelt dieses Kapitel als
+        ;; chapterref-Header-Feld, woraus toc_include.ily den Kapitel-Index baut.
+        (current-chapter #f)
+        ;; Stellt einer beliebigen Seite (markup-/image-/emptyPage) den Kapitel-
+        ;; Eintrag (chapter-to-pdf-toc) bei, falls an Position `this-index` ein
+        ;; Kapitel faellig ist, und entfernt es aus `pending`. So fuehrt die
+        ;; Kapitel-Referenz zur ersten Seite nach dem \songsChapter -- egal
+        ;; welcher Seitentyp das ist. Der Eintrag wird als unsichtbares Overlay
+        ;; (\combine) beigelegt, damit er das Seitenlayout nicht veraendert;
+        ;; \with-dimensions gibt dem sonst extent-losen pdfmark einen minimalen
+        ;; Extent, damit er auch auf leeren Seiten nicht verworfen wird.
+        (chapter-prefixed-markup
+          (lambda (this-index base-markup)
+            (if (and (pair? pending) (<= (car (car pending)) this-index))
+                (let ((cnt (caddr (car pending)))
+                      (title (cadr (car pending))))
+                  (set! pending (cdr pending))
+                  (set! current-chapter title)
+                  (make-combine-markup
+                    base-markup
+                    (make-with-dimensions-markup '(0 . 0) '(0 . 0.1)
+                      (make-chapter-to-pdf-toc-markup cnt title))))
+                base-markup)))
+        (index 0))
  (for-each (lambda (songitems)
-   (ly:book-add-bookpart! (ly:parser-lookup '$current-book)
-    (let ((filename (car songitems))
-          (songvars (cdr songitems)))
-      (if (eq? filename 'emptyPage)
-          #{ \bookpart { \markup { \null } } #}
-      (if (eq? filename 'imagePage)
-          (let ((xsize (assq-ref songvars 'xsize))
-                (filename (ly:format "~a/~a" imagePagePath (assq-ref songvars 'filename))))
-          #{ \bookpart {
-               \paper {
-                 %{
-                 inner-margin = 0
-                 outer-margin = 0
-                 binding-offset = 0
-                 top-margin = 0
-                 bottom-margin = 0
-                 %}
-                 print-page-number = ##f
-                 last-bottom-spacing = #'((basic-distance . 0) (minimum-distance . 0) (padding . 0))
-                 page-count = 1
-              }
-              \markup { \pagecenter { \epsfile #X #xsize #filename } }
-          } #}
-          )
-          (let ((header #{ \bookpart { $(assq-ref songvars 'header) \header {
-                  songfilename = $(symbol->string filename)
-                  myindexlabel = #(assq-ref songvars 'label)
-                } } #})
-                ;(header (assq-ref songvars 'header))
-                (music (assq-ref songvars 'music))
-                (layout (assq-ref songvars 'layout))
-                (text (assq-ref songvars 'text))
-                (label (assq-ref songvars 'label)))
+   (let ((this-index index))
+     (set! index (+ index 1))
+     (ly:book-add-bookpart! (ly:parser-lookup '$current-book)
+      (let ((filename (car songitems))
+            (songvars (cdr songitems)))
+        (if (eq? filename 'emptyPage)
+            #{ \bookpart { \markup { $(chapter-prefixed-markup this-index (make-null-markup)) } } #}
+        (if (eq? filename 'markupPage)
+            ;; Kapitelanfang auf einer markuppage: Kapitel-Eintrag wird dieser
+            ;; Seite beigelegt (siehe chapter-prefixed-markup).
+            #{ \bookpart { \markup { $(chapter-prefixed-markup this-index (assq-ref songvars 'markup)) } } #}
+        (if (eq? filename 'imagePage)
+            (let* ((xsize (assq-ref songvars 'xsize))
+                   (filename (ly:format "~a/~a" imagePagePath (assq-ref songvars 'filename)))
+                   (img-markup #{ \markup { \pagecenter { \epsfile #X #xsize #filename } } #}))
+            #{ \bookpart {
+                 \paper {
+                   %{
+                   inner-margin = 0
+                   outer-margin = 0
+                   binding-offset = 0
+                   top-margin = 0
+                   bottom-margin = 0
+                   %}
+                   print-page-number = ##f
+                   last-bottom-spacing = #'((basic-distance . 0) (minimum-distance . 0) (padding . 0))
+                   page-count = 1
+                }
+                \markup { $(chapter-prefixed-markup this-index img-markup) }
+            } #}
+            )
+            ;; Ist ein Kapitel faellig (Start <= aktuelle Position) und dies ein
+            ;; echtes Lied, wird die Kapitelinfo an dieses Lied gehaengt und aus
+            ;; `pending` entfernt.
+            (let* ((newnumber (+ 1 song-number))
+                   (chaptertitle (if (and (pair? pending) (<= (car (car pending)) this-index))
+                                     (cadr (car pending)) #f))
+                   (chaptercount (if chaptertitle (caddr (car pending)) 0))
+                   ;; Startet das Kapitel erst auf diesem Song (nicht schon auf
+                   ;; einer vorangehenden Seite), wird current-chapter jetzt
+                   ;; gesetzt und pending entfernt -- vor dem Bau des Headers,
+                   ;; damit chapterref bereits das neue Kapitel enthaelt.
+                   (_ (if chaptertitle
+                          (begin (set! current-chapter chaptertitle)
+                                 (set! pending (cdr pending)))))
+                   (header #{ \bookpart { $(assq-ref songvars 'header) \header {
+                     songfilename = $(symbol->string filename)
+                     myindexlabel = #(assq-ref songvars 'label)
+                     songnumber = #(number->string newnumber)
+                     chaptertitle = #chaptertitle
+                     chaptercount = #chaptercount
+                     chapterref = #current-chapter
+                   } } #})
+                   (music (assq-ref songvars 'music))
+                   (layout (assq-ref songvars 'layout))
+                   (text-pages (assq-ref songvars 'text-pages))
+                   (label (assq-ref songvars 'label))
+                   (toc-music (header-module-to-toc! (ly:book-header header) label)))
+            (set! song-number newnumber)
+            ;; Eingebettete Lieder: eigene Liednummer, gleiche Seite (label)
+            (for-each
+              (lambda (song)
+                (let ((tocheader (make-module)))
+                  (set! song-number (+ 1 song-number))
+                  (ly:module-copy tocheader song)
+                  (module-define! tocheader 'songnumber (number->string song-number))
+                  (module-define! tocheader 'chapterref current-chapter)
+                  (header-module-to-toc! tocheader label)))
+              (embedded-songs-of-header (ly:book-header header)))
             #{
               \bookpart {
                 $header
-                \headerToTOC #header #label
-                \score { $music \layout { $layout } }
-                $text
+                $toc-music
+                \score { $music \layout { $layout songfilename = $(symbol->string filename) } }
+                $(add-text-pages text-pages)
               }
-            #}))))))
-   (reverse song-list)
-   ))
+            #}))))))))
+   ordered
+   )))
 
 #(define (boernel-stats)
    (let (

private_includes/book/toc_include.ily

@@ -0,0 +1,489 @@
+% embed all category images in postscript once
+#(define-markup-list-command (embed-category-images layout props)()
+   (map (lambda (category)
+     (interpret-markup layout props
+       (markup #:epsfileembed (category-image-path (symbol->string (car category))))))
+       category-names))
+
+% print a markup-list in columns
+#(define-markup-list-command (columnlayout layout props cols margin heightpair lines) (integer? number? pair? markup-list?)
+   (let create-col-page ((line-width (- (/ (chain-assoc-get 'line-width props
+                          (ly:output-def-lookup layout 'line-width))
+                           cols) margin ))
+                         (cols cols)
+                         (height (car heightpair))
+                         (restlines lines))
+     (cons
+     (interpret-markup layout props
+       (make-fill-line-markup
+        (map (lambda (foo)
+         (make-general-align-markup Y UP (make-override-markup '(baseline-skip . 1) (make-column-markup
+          (let add-to-col ((lines restlines) (height-left height))
+            (set! restlines lines)
+            (if (null? lines)
+              '()
+              (let* ((line-to-stencil (lambda (line) (interpret-markup layout (cons (list (cons 'line-width line-width) (cons 'baseline-skip 1)) props) (markup line))))
+                     (stencil-height (lambda (stencil) (interval-length (ly:stencil-extent stencil Y))))
+                     (linestencil (line-to-stencil (car lines)))
+                     (current-line-height (stencil-height linestencil))
+                     (new-height-left (- height-left current-line-height))
+                     (next-line-height (if (null? (cdr lines)) current-line-height (stencil-height (line-to-stencil (cadr lines)))))
+                     (no-space-for-next-line (and (< next-line-height current-line-height) (< new-height-left next-line-height)))
+                     )
+                (if (or (< new-height-left 0) no-space-for-next-line)
+                  '()
+                  (cons (markup #:stencil linestencil) (add-to-col (cdr lines) new-height-left))))))))))
+          (make-list cols))))
+     (if (null? restlines)
+         (list)
+       (create-col-page line-width cols (cdr heightpair) restlines)))))
+
+%%%%%%%%%%%%%%%%%%%%%%%
+%%%Funktionen für Inhaltsverzeichnis
+% geklaut von da:
+% http://lsr.dsi.unimi.it/LSR/Snippet?id=763
+
+% Usage:
+% - define and index item with \indexItem $sortstring $markup
+% - use \indexSection $sortstring $markup to divide the index into several sections
+% - display the alphabetical index with \markuplines \index
+
+% code ist mostly taken from ./ly/toc-init.ly and just renamed and slightly modfied
+
+%% defined later, in a closure
+#(define*-public (add-index-item! markup-symbol text sorttext #:optional label) #f)
+#(define-public (index-items) #f)
+
+#(let ((index-item-list (list)))
+   (set! add-index-item!
+   (lambda* (markup-symbol textoptions sorttext #:optional (label (gensym "index")))
+       (set! index-item-list
+       ;; We insert index items sorted from the beginning on and do
+       ;; not sort them later - this saves pretty much computing time
+       (insert-alphabetical-sorted! (list label markup-symbol textoptions
+          (ly:string-substitute " " ""
+          (ly:string-substitute "." ""
+          (transliterate-de sorttext))))
+        index-item-list))
+       (make-music 'EventChord
+         'page-marker #t
+         'page-label label
+         'elements (list (make-music 'LabelEvent
+         'page-label label)))))
+   (set! index-items (lambda ()
+         index-item-list)))
+
+#(define (insert-alphabetical-sorted! iitem ilist)
+  (if (null? ilist)
+      (list iitem)
+      (if (string-ci<? (cadddr iitem) (cadddr (car ilist)))
+          (cons iitem ilist)
+          (cons (car ilist) (insert-alphabetical-sorted! iitem (cdr ilist))))))
+
+% code for category index
+#(define*-public (add-category-index-item! categories markup-symbol textoptions #:optional label) #f)
+#(define-public (category-index-items) #f)
+
+#(let ((category-index-hash (make-hash-table)))
+   (set! add-category-index-item!
+   (lambda* (categories markup-symbol textoptions #:optional (label (gensym "index")))
+     (for-each (lambda (category)
+            (let* ((catsym (string->symbol category))
+                   (catlist (hashq-ref category-index-hash catsym
+                              (list (list label 'indexCategoryMarkup `(((combine-with-next . #t) (rawtext . ,category))))))))
+              (if (assq catsym category-names)
+                (hashq-set! category-index-hash catsym
+                  (cons (list label markup-symbol textoptions) catlist))
+                (ly:error "song: <~a> category ~a is not defined!" (markup->string (chain-assoc-get 'rawtext textoptions)) category))))
+       categories)
+       (make-music 'EventChord
+         'page-marker #t
+         'page-label label
+         'elements (list (make-music 'LabelEvent
+         'page-label label)))))
+   (set! category-index-items (lambda ()
+          (append-map (lambda (kv) (reverse (hashq-ref category-index-hash (car kv) (list)))) category-names))))
+
+% code for author index
+#(define*-public (add-author-index-item! authorIDs markup-symbol text #:optional label) #f)
+#(define-public (author-index-items) #f)
+
+#(let ((author-index-hash (make-hash-table)))
+   (set! add-author-index-item!
+   (lambda* (authorIDs markup-symbol textoptions #:optional (label (gensym "index")))
+     (for-each (lambda (authorID)
+            (let* ((authorsym (string->symbol authorID))
+                   (authorlist (hashq-ref author-index-hash authorsym
+                              (list (list label 'indexAuthorMarkup `(((combine-with-next . #t) (rawtext . ,authorID))))))))
+                (hashq-set! author-index-hash authorsym
+                  (cons (list label markup-symbol textoptions) authorlist))
+                ))
+       authorIDs)
+       (make-music 'EventChord
+         'page-marker #t
+         'page-label label
+         'elements (list (make-music 'LabelEvent
+         'page-label label)))))
+   (set! author-index-items (lambda ()
+          (append-map cdr
+            (sort-list
+              (hash-map->list
+                (lambda (authorsym authorlist) (cons (string-downcase (symbol->string authorsym)) (reverse authorlist)))
+                author-index-hash)
+              (lambda (a b) (string-ci<? (car a) (car b))))))))
+
+% code for chapter index
+% Anders als bei Kategorien/Autoren ergibt sich die Kapitelzugehoerigkeit nicht
+% aus dem Song-Header, sondern aus dem \songsChapter, das dem Song vorangeht
+% (in book_include.ily als Header-Feld chapterref an jeden Song gehaengt).
+% Die Kapitel behalten hier ihre Auftritts-Reihenfolge (nicht alphabetisch),
+% ebenso die Songs innerhalb eines Kapitels ihre Song-Reihenfolge.
+#(define*-public (add-chapter-index-item! chapter markup-symbol textoptions #:optional label) #f)
+#(define-public (chapter-index-items) #f)
+
+#(let ((chapter-index-hash (make-hash-table))
+       (chapter-order '()))
+   (set! add-chapter-index-item!
+   (lambda* (chapter markup-symbol textoptions #:optional (label (gensym "index")))
+     (let* ((chaptersym (string->symbol chapter))
+            (existing (hashq-ref chapter-index-hash chaptersym #f))
+            (chapterlist (or existing
+                           (begin
+                             (set! chapter-order (cons chaptersym chapter-order))
+                             (list (list label 'indexChapterMarkup `(((combine-with-next . #t) (rawtext . ,chapter))))))))
+            )
+       (hashq-set! chapter-index-hash chaptersym
+         (cons (list label markup-symbol textoptions) chapterlist)))
+       (make-music 'EventChord
+         'page-marker #t
+         'page-label label
+         'elements (list (make-music 'LabelEvent
+         'page-label label)))))
+   (set! chapter-index-items (lambda ()
+          (append-map (lambda (chaptersym) (reverse (hashq-ref chapter-index-hash chaptersym (list))))
+            (reverse chapter-order)))))
+
+
+#(define-markup-command (with-link-symbol-ref layout props symbol arg)
+   (symbol? markup?)
+   "call with-link with the label referenced by symbol"
+   (let ((label (chain-assoc-get symbol props)))
+     (interpret-markup layout props
+     (markup #:with-link label arg))))
+
+#(define-markup-command (category-image-symbol-ref layout props size symbol)
+   (number? symbol?)
+   "call category-image with the category referenced by symbol"
+   (let ((category (chain-assoc-get symbol props)))
+     (interpret-markup layout props
+     (markup #:category-image size category))))
+
+#(define-markup-command (category-name-symbol-ref layout props symbol)
+   (symbol?)
+   "get the name of a category referenced by symbol"
+   (let* ((category (chain-assoc-get symbol props))
+          (catname (assq (string->symbol category) category-names)))
+     (interpret-markup layout props
+     (markup #:override (cons 'baseline-skip 3.5) (if catname (make-left-column-markup (string-split (cadr catname) #\newline)) category)))))
+
+#(define-markup-command (index-item-with-pattern layout props)()
+    #:properties ((index:text "")
+                  (index:alternative #f)
+                  (index:page #f)
+                  (line-width))
+    (let* (
+            (width (-
+                     line-width
+                     (interval-length (ly:stencil-extent (interpret-markup layout props "XXXX") X))))
+            (lines-reversed
+              (reverse (map (lambda (stil) (markup #:stencil stil))
+                (wordwrap-string-internal-markup-list layout
+                  (prepend-alist-chain 'line-width width
+                    (if index:alternative
+                        (prepend-alist-chain 'font-shape 'italic props)
+                        props))
+                  #f
+                  index:text))))
+            (last-line-with-dots (make-fill-with-pattern-markup 1 RIGHT "." (car lines-reversed) index:page))
+            (lines-without-dots (cdr lines-reversed))
+            (target-line-size-markup
+                 (make-column-markup
+                   (list
+                    (make-simple-markup "Agj")
+                    (make-vspace-markup 0.2))))
+            )
+      (interpret-markup layout props
+        (make-size-box-to-box-markup #f #t
+          (make-with-link-symbol-ref-markup 'index:label
+            (make-column-markup
+              (reverse (cons
+                          last-line-with-dots
+                          (map (lambda (m) (make-size-box-to-box-markup #f #t m target-line-size-markup)) lines-without-dots)))))
+          ; this column is just to have a reference height for resizing
+          (make-column-markup
+            (reverse (map (lambda (m) (make-size-box-to-box-markup #f #t m target-line-size-markup)) (cons last-line-with-dots lines-without-dots))))
+                          ))))
+
+\paper {
+  indexItemMarkup = \markup {
+    \sans \index-item-with-pattern
+  }
+  indexSectionMarkup = \markup \override #'(baseline-skip . 1.5) \left-column {
+    \sans \bold \fontsize #3 \fromproperty #'index:text
+    \null
+  }
+  indexCategoryMarkup = \markup \override #'(baseline-skip . 1.5) \column {
+    \fill-line { \line { \vcenter \category-image-symbol-ref #7 #'index:text \hspace #3 \vcenter \sans \bold \fontsize #3 \category-name-symbol-ref #'index:text } \null }
+    \vspace #.4
+  }
+  indexAuthorMarkup = \markup \override #'(baseline-skip . 1.5) \left-column {
+    \vspace #1
+    \sans \bold \fontsize #3
+      #(make-on-the-fly-markup
+        (lambda (layout props m)
+          (interpret-markup layout props
+            (make-justify-string-markup (format-author (ly:output-def-lookup layout 'authorFormat) (chain-assoc-get 'index:text props #f) #t))))
+        (make-null-markup))
+    \vspace #.4
+  }
+  indexChapterMarkup = \markup \override #'(baseline-skip . 1.5) \left-column {
+    \vspace #1
+    \sans \bold \fontsize #3 \fromproperty #'index:text
+    \vspace #.4
+  }
+}
+
+#(define (prepare-item-markup items layout)
+  (define (single-item-markup index-item)
+    (let* ((label (car index-item))
+           (index-markup (cadr index-item))
+           (textoptions (caddr index-item))
+           (text (chain-assoc-get 'rawtext textoptions))
+           (alternative (chain-assoc-get 'alternative textoptions))
+           (songnumber (chain-assoc-get 'songnumber textoptions)))
+      (markup #:override (cons 'index:label label)
+        #:override (cons 'index:page (markup #:custom-page-number label -1))
+        #:override (cons 'index:text text)
+        #:override (cons 'index:alternative alternative)
+        #:override (cons 'index:songnumber songnumber)
+        (ly:output-def-lookup layout index-markup))))
+  (if (null? items)
+      items
+      (let* ((index-item (car items))
+             (combine-with-next (chain-assoc-get 'combine-with-next (caddr index-item) #f))
+             (restitems (cdr items))
+             (item-markup (single-item-markup index-item)))
+        (if (and combine-with-next (not (null? restitems)))
+            (cons (make-column-markup (list item-markup (single-item-markup (car restitems)))) (prepare-item-markup (cdr restitems) layout))
+            (cons item-markup (prepare-item-markup restitems layout))))
+      ))
+
+#(define-markup-list-command (index-in-columns-with-title layout props index-type title-markup) (symbol? markup?)
+  ( _i "Outputs index alphabetical sorted or in categories" )
+    (let ((items (case index-type
+            ((alphabetical) index-items)
+            ((categories) category-index-items)
+            ((authors) author-index-items)
+            ((chapters) chapter-index-items)))
+          (title (interpret-markup layout props title-markup)))
+      (cons title
+      (interpret-markup-list layout props
+        (make-columnlayout-markup-list songTocColumns 2
+          (let ((h (- (ly:output-def-lookup layout 'paper-height) 12)))
+            (cons (- h (interval-length (ly:stencil-extent title Y))) h))
+          (prepare-item-markup (items) layout))))))
+
+indexItem =
+#(define-music-function (parser location sorttext text) (string? markup?)
+   "Add a line to the alphabetical index, using the @code{indexItemMarkup} paper variable markup."
+   (add-index-item! 'indexItemMarkup (prepend-alist-chain 'rawtext text '()) sorttext))
+
+indexSection =
+#(define-music-function (parser location sorttext text) (string? markup?)
+   "Add a section line to the alphabetical index, using @code{indexSectionMarkup} paper variable markup. This can be used to divide the alphabetical index into different sections, for example one section for each first letter."
+   (add-index-item! 'indexSectionMarkup (prepend-alist-chain 'combine-with-next #t (prepend-alist-chain 'rawtext text '())) sorttext))
+
+#(define (extract-and-check-vars-from-header bookheader varlist)
+  (extract-and-check-vars-from-module (ly:book-header bookheader) varlist))
+
+#(define (header-module-to-toc! headermodule label)
+    (define (all-author-ids authors)
+      (let ((poetIds (find-author-ids-by 'text authors))
+            (translatorIds (find-author-ids-by 'translation authors))
+            (versePoetData (find-author-id-with-part-numbers 'verse authors))
+            (composerIds (find-author-ids-by 'melody authors))
+            (verseComposerData (find-author-id-with-part-numbers 'meloverse authors))
+            (refComposerIds (find-author-ids-by 'meloref authors))
+            (voiceComposerData (find-author-id-with-part-numbers 'voice authors))
+            (compositionIds (find-author-ids-by 'composition authors))
+            (adaptionIds (find-author-ids-by 'adaption authors))
+            (bridgeIds (find-author-ids-by 'bridge authors))
+            (interludeIds (find-author-ids-by 'interlude authors)))
+        (delete-duplicates
+          (append poetIds translatorIds (map car versePoetData) composerIds (map car verseComposerData) refComposerIds (map car voiceComposerData) compositionIds adaptionIds bridgeIds interludeIds))
+    ))
+    (let*
+      (
+       (extractedheadervars (extract-and-check-vars-from-module headermodule '(title starttext alttitle categorytitle categories authors songnumber chapterref)))
+       (title (assq-ref extractedheadervars 'title))
+       (starttext (assq-ref extractedheadervars 'starttext))
+       (alttitle (assq-ref extractedheadervars 'alttitle))
+       (categorytitle (assq-ref extractedheadervars 'categorytitle))
+       (categories (assq-ref extractedheadervars 'categories))
+       (authors (assq-ref extractedheadervars 'authors))
+       (songnumber (assq-ref extractedheadervars 'songnumber))
+       (chapterref (assq-ref extractedheadervars 'chapterref))
+       (textoptions (lambda (text alternative) `(((rawtext . ,text) (alternative . ,alternative) (songnumber . ,songnumber)))))
+       (add-to-toc! (lambda (toctitle alternative)
+                      (add-index-item! 'indexItemMarkup (textoptions toctitle alternative) toctitle label)))
+       )
+           (if categories (add-category-index-item! (string-tokenize categories) 'indexItemMarkup (textoptions (if categorytitle categorytitle title) #f) label))
+           (if authors (add-author-index-item! (all-author-ids authors) 'indexItemMarkup (textoptions (if categorytitle categorytitle title) #f) label))
+           (if chapterref (add-chapter-index-item! chapterref 'indexItemMarkup (textoptions (if categorytitle categorytitle title) #f) label))
+           (if starttext (add-to-toc! starttext #t))
+           (if alttitle
+               (if (list? alttitle)
+                   (for-each (lambda (alt)
+                                (add-to-toc! alt #t))
+                             alttitle)
+                   (add-to-toc! alttitle #t)))
+           (if title (add-to-toc! title #f) #{ #})
+    ))
+
+headerToTOC = #(define-music-function (parser location header label) (ly:book? symbol?)
+  (header-module-to-toc! (ly:book-header header) label))
+
+
+%% https://github.com/NalaGinrut/guile-csv/blob/master/csv/csv.scm
+
+#(define* (sxml->csv sxml port #:key (delimiter #\,))
+  (let* ((d (string delimiter))
+         (csv (map (lambda (l) (string-join l d)) sxml)))
+    (for-each (lambda (l)
+                (format port "~a~%" l))
+              csv)))
+
+#(define csv-write sxml->csv)
+
+#(define-markup-command (write-toc-csv layout props) ()
+  (define (csv-escape field)
+    (if (string-null? field)
+        field
+        (string-append
+          "\""
+          (ly:string-substitute "\n" "\\n"
+            (ly:string-substitute "\"" "\\\"" field))
+          "\"")))
+  (define (format-authors authorIds)
+    (string-join (map (lambda (authorId) (format-author (ly:output-def-lookup layout 'authorFormat) authorId #f)) authorIds) ", "))
+  (define cr-regex (ly:make-regex "\r"))
+  (define crlf-regex (ly:make-regex "\r\n"))
+  (define para-sep-regex (ly:make-regex "\n[ \t\n]*\n[ \t\n]*"))
+  (define whitespace-regex (ly:make-regex "[ \t\n]+"))
+  (define leading-whitespace-regex (ly:make-regex "^[ \t\n]+"))
+  (define trailing-whitespace-regex (ly:make-regex "[ \t\n]+$"))
+  (define (cleanup-whitespaces str)
+    (ly:regex-replace leading-whitespace-regex
+      (ly:regex-replace trailing-whitespace-regex
+        (ly:regex-replace whitespace-regex str " ")
+        "")
+      ""))
+  (define (format-info-paragraphs text)
+    (let* ((para-strings (ly:regex-split
+                        para-sep-regex
+                        (ly:regex-replace
+                         cr-regex
+                         (ly:regex-replace crlf-regex text "\n")
+                         "\n")))
+         (para-lines (map cleanup-whitespaces para-strings)))
+    (string-join para-lines "\n")))
+  (define (generate-toc-csv labelPageTable)
+    (define (song-line filename page-number headermodule)
+            (let* ((extractedheadervars (extract-and-check-vars-from-module headermodule
+                      '(title starttext alttitle categorytitle categories authors year_text year_melody year_translation year_composition year_adaption infotext translation pronunciation copyright source)))
+                   (headervar-or-empty (lambda (varsym)
+                     (let ((extracted (assq-ref extractedheadervars varsym)))
+                       (if extracted extracted ""))))
+                   (authors (assq-ref extractedheadervars 'authors))
+                   (poetIds (find-author-ids-by 'text authors))
+                   (translatorIds (find-author-ids-by 'translation authors))
+                   (versePoetData (find-author-id-with-part-numbers 'verse authors))
+                   (composerIds (find-author-ids-by 'melody authors))
+                   (verseComposerData (find-author-id-with-part-numbers 'meloverse authors))
+                   (refComposerIds (find-author-ids-by 'meloref authors))
+                   (voiceComposerData (find-author-id-with-part-numbers 'voice authors))
+                   (compositionIds (find-author-ids-by 'composition authors))
+                   (adaptionTextIds (find-author-ids-by 'adaption_text authors))
+                   (adaptionMusicIds (find-author-ids-by 'adaption_music authors))
+                   (bridgeIds (find-author-ids-by 'bridge authors))
+                   (interludeIds (find-author-ids-by 'interlude authors)))
+              (map csv-escape
+                (list
+                  filename
+                  page-number
+                  (headervar-or-empty 'title)
+                  (headervar-or-empty 'starttext)
+                  (let ((alttitle-value (headervar-or-empty 'alttitle)))
+                    (if (list? alttitle-value)
+                        (string-join alttitle-value ", ")  ; Wenn eine Liste, dann zusammenfügen
+                        alttitle-value))  ; Wenn kein Liste, den originalen Wert verwenden
+
+                  (headervar-or-empty 'categorytitle)
+                  (headervar-or-empty 'categories)
+                  (format-authors (append poetIds adaptionTextIds (map car versePoetData)))
+                  (format-authors translatorIds)
+                  (format-authors (append composerIds compositionIds adaptionMusicIds bridgeIds interludeIds (map car voiceComposerData) (map car verseComposerData) refComposerIds))
+                  (headervar-or-empty 'year_text)
+                  (headervar-or-empty 'year_melody)
+                  (headervar-or-empty 'year_translation)
+                  (headervar-or-empty 'year_composition)
+                  (headervar-or-empty 'year_adaption_text)
+                  (headervar-or-empty 'year_adaption_music)
+                  (headervar-or-empty 'copyright)
+                  (headervar-or-empty 'source)
+                  (format-info-paragraphs (headervar-or-empty 'infotext))
+                  (format-info-paragraphs (headervar-or-empty 'translation))
+                  (format-info-paragraphs (headervar-or-empty 'pronunciation))
+              ))))
+    ;; Eingebettete Lieder (embedded_songs.ily) bekommen eigene Zeilen mit
+    ;; Dateiname und Seite des Hauptlieds.
+    (let ((song-lines (append-map (lambda (song)
+            (let* ((filename (symbol->string (car song)))
+                   (songvars (cdr song))
+                   (page-number (assoc-get (assq-ref songvars 'label) labelPageTable))
+                   (headermodule (ly:book-header (assq-ref songvars 'header))))
+              (map (lambda (module) (song-line filename page-number module))
+                   (cons headermodule (embedded-songs-of-header headermodule)))))
+            (alist-delete 'markupPage (alist-delete 'imagePage (alist-delete 'emptyPage song-list))))))
+    (call-with-output-file "toc.csv"
+      (lambda (port)
+       (csv-write (cons '(
+        "filename"
+        "page-number"
+        "title"
+        "starttext"
+        "alttitle"
+        "categorytitle"
+        "categories"
+        "poets"
+        "translators"
+        "composers"
+        "year_text"
+        "year_melody"
+        "year_translation"
+        "year_composition"
+        "year_adaption_text"
+        "year_adaption_music"
+        "copyright"
+        "source"
+        "infotext"
+        "translation"
+        "pronunciation"
+        ) song-lines) port))
+  )))
+  ; we use a delayed stencil to have all the page references available
+  (ly:make-stencil
+    `(delay-stencil-evaluation
+      ,(delay (let* ((table (ly:output-def-lookup layout 'label-page-string-table)))
+        (generate-toc-csv (if (list? table) table '()))
+        empty-stencil)))))

private_includes/book/transliteration.ily

@@ -0,0 +1,65 @@
+#(define (transliterate-de str)
+   "Gesamte Transliteration: entfernt Diakritika, ersetzt Sonderzeichen, ergibt ASCII-String."
+
+   (define (remove-diacritics s)
+     (string-join
+       (map (lambda (ch)
+             (let ((code (char->integer ch)))
+               ;; Unicode-Bereich 0300–036F = Combining Diacritical Marks
+               (if (and (>= code #x0300) (<= code #x036F))
+                   ""
+                   (string ch))))
+           (string->list (string-normalize-nfkd s)))
+       ""))
+
+   (define transliteration-table
+     '(
+      ;; Deutsche Umlaute & ß
+      ("ä" . "ae") ("ö" . "oe") ("ü" . "ue")
+      ("Ä" . "Ae") ("Ö" . "Oe") ("Ü" . "Ue")
+      ("ß" . "ss")
+
+      ;; Balkan & mitteleuropäische Sonderzeichen
+      ("Č" . "C") ("č" . "c")
+      ("Š" . "S") ("š" . "s")
+      ("Ž" . "Z") ("ž" . "z")
+      ("Đ" . "D") ("đ" . "d")
+      ("Ł" . "L") ("ł" . "l")
+      ("Ø" . "O") ("ø" . "o")
+      ("Æ" . "Ae") ("æ" . "ae")
+      ("Œ" . "Oe") ("œ" . "oe")
+
+      ;; Kyrillische Buchstaben mit lateinischen Pendants
+      ("А" . "A") ("а" . "a")
+      ("Б" . "B") ("б" . "b")
+      ("В" . "V") ("в" . "v")
+      ("Г" . "G") ("г" . "g")
+      ("Д" . "D") ("д" . "d")
+      ("Е" . "E") ("е" . "e")
+      ("З" . "Z") ("з" . "z")
+      ("И" . "I") ("и" . "i")
+      ("К" . "K") ("к" . "k")
+      ("Л" . "L") ("л" . "l")
+      ("М" . "M") ("м" . "m")
+      ("Н" . "N") ("н" . "n")
+      ("О" . "O") ("о" . "o")
+      ("П" . "P") ("п" . "p")
+      ("Р" . "R") ("р" . "r")
+      ("С" . "S") ("с" . "s")
+      ("Т" . "T") ("т" . "t")
+      ("У" . "U") ("у" . "u")
+      ("Ф" . "F") ("ф" . "f")
+      ("Х" . "Kh") ("х" . "kh")
+      ("Ц" . "Ts") ("ц" . "ts")
+      ("Ч" . "Ch") ("ч" . "ch")
+      ("Ш" . "Sh") ("ш" . "sh")
+      ("Щ" . "Sch") ("щ" . "sch")
+      ("Я" . "Ja") ("я" . "ja")
+      ("Ю" . "Ju") ("ю" . "ju")
+      ("Й" . "J") ("й" . "j")
+    ))
+
+  (remove-diacritics
+    (fold (lambda (pair acc)
+          (ly:string-substitute (car pair) (cdr pair) acc))
+        str transliteration-table)))

public_includes/book_top.ily

@@ -0,0 +1,4 @@
+\include "../private_includes/book/book_include.ily"
+\include "../private_includes/book/transliteration.ily"
+\include "../private_includes/book/toc_include.ily"
+\include "../private_includes/book/appendix.ily"

public_includes/break_paged_output.ily

@@ -0,0 +1,2 @@
+\include "lilypond-book-preamble.ly"
+#(ly:set-option 'separate-page-formats "pdf")

public_includes/layout_bottom.ily

@@ -0,0 +1,126 @@
+MUSIC = { \transposable #TRANSPOSITION \MUSIC }
+
+%% Eingebettete Lieder (siehe embedded_songs.ily) im Header des Hauptlieds
+%% vermerken, daraus bauen Footer, PDF-Lesezeichen und Verzeichnisse.
+#(if (and (pair? EMBEDDED_SONGS) (ly:book? HEADER) (ly:book-header HEADER))
+  (module-define! (ly:book-header HEADER) 'embeddedsongs EMBEDDED_SONGS))
+
+LAYOUT = \layout {
+  \LAYOUT
+  #(customized-layout LAYOUT)
+}
+
+#(customize-embedded-score-layouts! (list TEXT TEXT_PAGES))
+
+verselayout = \layout {
+  \LAYOUT
+  \context {
+    \ChordNames
+    \override ChordName.font-size = \songTextChordFontSize
+  }
+}
+
+TEXT = \markuplist {
+  \override #`(transposition . ,TRANSPOSITION)
+  \override #`(verselayout . ,verselayout)
+  \override #`(verse-chords . ,#{ \chords { \verseChords } #})
+  \override #`(verse-reference-voice . ,#{ \global \firstVoice  #})
+  \handle-tag-groups \recordedTagGroups
+  \TEXT
+}
+
+#(define TEXT_PAGES
+  (map
+    (lambda (text) #{
+      \markuplist {
+        \override #`(transposition . ,TRANSPOSITION)
+        \override #`(verselayout . ,verselayout)
+        \override #`(verse-chords . ,#{ \chords { \verseChords } #})
+        \override #`(verse-reference-voice . ,#{ \global \firstVoice  #})
+        \handle-tag-groups \recordedTagGroups
+        #text
+      }
+    #})
+  (if
+    (and
+      (defined? 'TEXT_PAGES)
+      (pair? TEXT_PAGES))
+    TEXT_PAGES
+    (list TEXT))))
+
+%% Add invisible ChordPro write trigger to last TEXT_PAGES markuplist
+#(when (and (defined? 'chordpro-export-enabled) chordpro-export-enabled (pair? TEXT_PAGES))
+  (let* ((last-index (- (length TEXT_PAGES) 1))
+         (last-page (list-ref TEXT_PAGES last-index))
+         (modified-last-page #{
+           \markuplist {
+             #last-page
+             \chordpro-delayed-write
+           }
+         #}))
+    (set! TEXT_PAGES
+      (append (list-head TEXT_PAGES last-index)
+              (list modified-last-page)))))
+
+#(define (add-text-pages text-pages)
+  (if (pair? text-pages)
+    (begin
+      (add-score (car text-pages))
+      (for-each
+        (lambda (text)
+          (add-music (pageBreak))
+          (add-score text))
+        (cdr text-pages)))))
+
+#(if (not noStandaloneOutput)
+(begin
+  (let ((header (ly:book-header HEADER)) (paper (ly:book-paper HEADER)))
+    (if header (set! $defaultheader header))
+    (if paper (set! $defaultpaper paper))
+  )
+
+  ;; ChordPro export: Store filename and extract metadata from basicSongInfo FIRST
+  (when (and (defined? 'chordpro-export-enabled) chordpro-export-enabled)
+    ;; Use ly:parser-output-name which returns the output basename
+    ;; This will write relative to current working directory (same as PDF)
+    (let ((output-name (ly:parser-output-name)))
+      (set! chordpro-current-filename output-name))
+
+    ;; Try to extract metadata from the HEADER (falls back to basicSongInfo)
+    (let ((header-module (if (and (ly:book? HEADER) (ly:book-header HEADER))
+                             (ly:book-header HEADER)
+                             (and (defined? 'basicSongInfo) basicSongInfo))))
+      (when header-module
+        (let* ((header-alist (ly:module->alist header-module))
+               (title (assoc-ref header-alist 'title))
+               (authors (assoc-ref header-alist 'authors)))
+          (when title
+            (set! chordpro-header-title
+                  (if (markup? title)
+                      (markup->string title)
+                      (if (string? title) title "Untitled"))))
+          (when authors
+            (set! chordpro-header-authors authors))))))
+
+  (add-score #{
+    \score {
+      \MUSIC
+      \layout { \LAYOUT }
+    }#})
+  (add-text-pages TEXT_PAGES)
+
+  (add-score #{
+    \score {
+      \unfoldRepeats { \MUSIC \INLINESCOREMUSIC }
+      \midi {
+        \context {
+          \Staff
+          \remove "Staff_performer"
+        }
+        \context {
+          \Voice
+          \consists "Staff_performer"
+        }
+      }
+    }#})
+))

public_includes/layout_top.ily

@@ -1,6 +1,5 @@
-\version "2.25.8"
 #(ly:set-option 'relative-includes #t)
 
 #(define noDefaultOutput #t)
 
-\include "all_base_includes.ly"
+\include "../private_includes/base/all.ily"

public_includes/pool_bottom.ily

@@ -4,4 +4,4 @@ HEADER = \bookpart {
     \basicSongInfo
   }
 }
-\include #(if noDefaultOutput "void.ly" "standalone_output.ly")
+\include #(if noDefaultOutput "../private_includes/void.ily" "layout_bottom.ily")

public_includes/pool_top.ily

@@ -0,0 +1,5 @@
+#(ly:set-option 'relative-includes #t)
+
+#(define noDefaultOutput (if (defined? 'noDefaultOutput) noDefaultOutput #f))
+
+\include #(if noDefaultOutput "../private_includes/void.ily" "../private_includes/base/all.ily")

scm/json_parser.scm

@@ -1,482 +0,0 @@
-;;; (json parser) --- Guile JSON implementation.
-
-;; Copyright (C) 2013-2020 Aleix Conchillo Flaque <aconchillo@gmail.com>
-;;
-;; This file is part of guile-json.
-;;
-;; guile-json is free software: you can redistribute it and/or modify
-;; it under the terms of the GNU General Public License as published by
-;; the Free Software Foundation; either version 3 of the License, or
-;; (at your option) any later version.
-;;
-;; guile-json is distributed in the hope that it will be useful, but
-;; WITHOUT ANY WARRANTY; without even the implied warranty of
-;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
-;; General Public License for more details.
-;;
-;; You should have received a copy of the GNU General Public License
-;; along with guile-json. If not, see https://www.gnu.org/licenses/.
-
-;;; Commentary:
-
-;; JSON module for Guile
-
-;;; Code:
-
-(define-module (json parser)
-  #:use-module (ice-9 rdelim)
-  #:use-module (ice-9 streams)
-  #:use-module (rnrs io ports)
-  #:export (json->scm
-            json-string->scm
-            json-seq->scm
-            json-seq-string->scm))
-
-;;
-;; Miscellaneuos helpers
-;;
-
-(define (json-exception port)
-  (throw 'json-invalid port))
-
-(define (digit? c)
-  (case c
-    ((#\0 #\1 #\2 #\3 #\4 #\5 #\6 #\7 #\8 #\9) #t)
-    (else #f)))
-
-(define (whitespace? c)
-  (case c
-    ((#\sp #\ht #\lf #\cr) #t)
-    (else #f)))
-
-(define (control-char? ch)
-  (<= (char->integer ch) #x1F))
-
-(define (skip-whitespaces port)
-  (let ((ch (peek-char port)))
-    (cond
-     ((whitespace? ch)
-      (read-char port)
-      (skip-whitespaces port))
-     (else *unspecified*))))
-
-(define (expect-string port expected return)
-  (let loop ((n 0))
-    (cond
-     ;; All characters match.
-     ((= n (string-length expected)) return)
-     ;; Go to next characters.
-     ((eqv? (read-char port) (string-ref expected n))
-      (loop (+ n 1)))
-     ;; Anything else is an error.
-     (else (json-exception port)))))
-
-(define (expect-delimiter port delimiter)
-  (let ((ch (read-char port)))
-    (cond
-     ((not (eqv? ch delimiter)) (json-exception port))
-     ;; Unexpected EOF.
-     ((eof-object? ch) (json-exception port)))))
-
-(define (skip-record-separators port)
-  (when (eqv? #\rs (peek-char port))
-    (read-char port)
-    (skip-record-separators port)))
-
-;;
-;; Number parsing helpers
-;;
-
-(define (expect-digit port)
-  (let ((ch (peek-char port)))
-    (cond
-     ((not (digit? ch)) (json-exception port))
-     ;; Unexpected EOF.
-     ((eof-object? ch) (json-exception port)))))
-
-;; Read + or -, and return 1 or -1 respectively. If something different is
-;; found, return 1.
-(define (read-sign port)
-  (let ((ch (peek-char port)))
-    (cond
-     ((eqv? ch #\+)
-      (read-char port)
-      1)
-     ((eqv? ch #\-)
-      (read-char port)
-      -1)
-     (else 1))))
-
-(define (read-digit-value port)
-  (let ((ch (read-char port)))
-    (cond
-     ((eqv? ch #\0) 0)
-     ((eqv? ch #\1) 1)
-     ((eqv? ch #\2) 2)
-     ((eqv? ch #\3) 3)
-     ((eqv? ch #\4) 4)
-     ((eqv? ch #\5) 5)
-     ((eqv? ch #\6) 6)
-     ((eqv? ch #\7) 7)
-     ((eqv? ch #\8) 8)
-     ((eqv? ch #\9) 9)
-     (else (json-exception port)))))
-
-;; Read digits [0..9].
-(define (read-digits port)
-  (expect-digit port)
-  (let loop ((ch (peek-char port)) (number 0))
-    (cond
-     ((digit? ch)
-      (let ((value (read-digit-value port)))
-        (loop (peek-char port) (+ (* number 10) value))))
-     (else number))))
-
-(define (read-digits-fraction port)
-  (expect-digit port)
-  (let loop ((ch (peek-char port)) (number 0) (length 0))
-    (cond
-     ((digit? ch)
-      (let ((value (read-digit-value port)))
-        (loop (peek-char port) (+ (* number 10) value) (+ length 1))))
-     (else
-      (/ number (expt 10 length))))))
-
-(define (read-exponent port)
-  (let ((ch (peek-char port)))
-    (cond
-     ((or (eqv? ch #\e) (eqv? ch #\E))
-      (read-char port)
-      (let ((sign (read-sign port))
-            (digits (read-digits port)))
-        (if (<= digits 1000) ;; Some maximum exponent.
-            (expt 10 (* sign digits))
-            (json-exception port))))
-     (else 1))))
-
-(define (read-fraction port)
-  (let ((ch (peek-char port)))
-    (cond
-     ((eqv? ch #\.)
-      (read-char port)
-      (read-digits-fraction port))
-     (else 0))))
-
-(define (read-positive-number port)
-  (let* ((number
-          (let ((ch (peek-char port)))
-            (cond
-             ;; Numbers that start with 0 must be a fraction.
-             ((eqv? ch #\0)
-              (read-char port)
-              0)
-             ;; Otherwise read more digits.
-             (else (read-digits port)))))
-         (fraction (read-fraction port))
-         (exponent (read-exponent port))
-         (result (* (+ number fraction) exponent)))
-    (if (and (zero? fraction) (>= exponent 1))
-        result
-        (exact->inexact result))))
-
-(define (json-read-number port)
-  (let ((ch (peek-char port)))
-    (cond
-     ;; Negative numbers.
-     ((eqv? ch #\-)
-      (read-char port)
-      (expect-digit port)
-      (* -1 (read-positive-number port)))
-     ;; Positive numbers.
-     ((digit? ch)
-      (read-positive-number port))
-     ;; Anything else is an error.
-     (else (json-exception port)))))
-
-;;
-;; Object parsing helpers
-;;
-
-(define (read-pair port null ordered)
-  ;; Read key.
-  (let ((key (json-read-string port)))
-    (skip-whitespaces port)
-    (let ((ch (peek-char port)))
-      (cond
-       ;; Skip colon and read value.
-       ((eqv? ch #\:)
-        (read-char port)
-        (cons key (json-read port null ordered)))
-       ;; Anything other than colon is an error.
-       (else (json-exception port))))))
-
-(define (json-read-object port null ordered)
-  (expect-delimiter port #\{)
-  (let loop ((pairs '()) (added #t))
-    (skip-whitespaces port)
-    (let ((ch (peek-char port)))
-      (cond
-       ;; End of object.
-       ((eqv? ch #\})
-        (read-char port)
-        (cond
-         (added (if ordered (reverse! pairs) pairs))
-         (else (json-exception port))))
-       ;; Read one pair and continue.
-       ((eqv? ch #\")
-        (let ((pair (read-pair port null ordered)))
-          (loop (cons pair pairs) #t)))
-       ;; Skip comma and read more pairs.
-       ((eqv? ch #\,)
-        (read-char port)
-        (cond
-         (added (loop pairs #f))
-         (else (json-exception port))))
-       ;; Invalid object.
-       (else (json-exception port))))))
-
-;;
-;; Array parsing helpers
-;;
-
-(define (json-read-array port null ordered)
-  (expect-delimiter port #\[)
-  (skip-whitespaces port)
-  (cond
-   ;; Special case when array is empty.
-   ((eqv? (peek-char port) #\])
-    (read-char port)
-    #())
-   (else
-    ;; Read first element in array.
-    (let loop ((values (list (json-read port null ordered))))
-      (skip-whitespaces port)
-      (let ((ch (peek-char port)))
-        (cond
-         ;; Unexpected EOF.
-         ((eof-object? ch) (json-exception port))
-         ;; Handle comma (if there's a comma there should be another element).
-         ((eqv? ch #\,)
-          (read-char port)
-          (loop (cons (json-read port null ordered) values)))
-         ;; End of array.
-         ((eqv? ch #\])
-          (read-char port)
-          (list->vector (reverse! values)))
-         ;; Anything else other than comma and end of array is wrong.
-         (else (json-exception port))))))))
-
-;;
-;; String parsing helpers
-;;
-
-(define (read-hex-digit->integer port)
-  (let ((ch (read-char port)))
-    (cond
-     ((eqv? ch #\0) 0)
-     ((eqv? ch #\1) 1)
-     ((eqv? ch #\2) 2)
-     ((eqv? ch #\3) 3)
-     ((eqv? ch #\4) 4)
-     ((eqv? ch #\5) 5)
-     ((eqv? ch #\6) 6)
-     ((eqv? ch #\7) 7)
-     ((eqv? ch #\8) 8)
-     ((eqv? ch #\9) 9)
-     ((or (eqv? ch #\A) (eqv? ch #\a)) 10)
-     ((or (eqv? ch #\B) (eqv? ch #\b)) 11)
-     ((or (eqv? ch #\C) (eqv? ch #\c)) 12)
-     ((or (eqv? ch #\D) (eqv? ch #\d)) 13)
-     ((or (eqv? ch #\E) (eqv? ch #\e)) 14)
-     ((or (eqv? ch #\F) (eqv? ch #\f)) 15)
-     (else (json-exception port)))))
-
-(define (read-unicode-value port)
-  (+ (* 4096 (read-hex-digit->integer port))
-      (* 256 (read-hex-digit->integer port))
-      (* 16 (read-hex-digit->integer port))
-      (read-hex-digit->integer port)))
-
-;; Unicode codepoint with surrogates is:
-;;   10000 + (high - D800) + (low - DC00)
-;; which is equivalent to:
-;;  (high << 10) + low - 35FDC00
-;; see
-;;   https://github.com/aconchillo/guile-json/issues/58#issuecomment-662744070
-(define (json-surrogate-pair->unicode high low)
-  (+ (* high #x400) low #x-35FDC00))
-
-(define (read-unicode-char port)
-  (let ((codepoint (read-unicode-value port)))
-    (cond
-     ;; Surrogate pairs. `codepoint` already contains the higher surrogate
-     ;; (between D800 and DC00) . At this point we are expecting another
-     ;; \uXXXX that holds the lower surrogate (between DC00 and DFFF).
-     ((and (>= codepoint #xD800) (< codepoint #xDC00))
-      (expect-string port "\\u" #f)
-      (let ((low-surrogate (read-unicode-value port)))
-        (if (and (>= low-surrogate #xDC00) (< low-surrogate #xE000))
-            (integer->char (json-surrogate-pair->unicode codepoint low-surrogate))
-            (json-exception port))))
-     ;; Reserved for surrogates (we just need to check starting from the low
-     ;; surrogates).
-     ((and (>= codepoint #xDC00) (< codepoint #xE000))
-      (json-exception port))
-     (else (integer->char codepoint)))))
-
-(define (read-control-char port)
-  (let ((ch (read-char port)))
-    (cond
-     ((eqv? ch #\") #\")
-     ((eqv? ch #\\) #\\)
-     ((eqv? ch #\/) #\/)
-     ((eqv? ch #\b) #\bs)
-     ((eqv? ch #\f) #\ff)
-     ((eqv? ch #\n) #\lf)
-     ((eqv? ch #\r) #\cr)
-     ((eqv? ch #\t) #\ht)
-     ((eqv? ch #\u) (read-unicode-char port))
-     (else (json-exception port)))))
-
-(define (json-read-string port)
-  (expect-delimiter port #\")
-  (let loop ((chars '()) (ch (read-char port)))
-    (cond
-     ;; Unexpected EOF.
-     ((eof-object? ch) (json-exception port))
-     ;; Unescaped control characters are not allowed.
-     ((control-char? ch) (json-exception port))
-     ;; End of string.
-     ((eqv? ch #\") (reverse-list->string chars))
-     ;; Escaped characters.
-     ((eqv? ch #\\)
-      (loop (cons (read-control-char port) chars) (read-char port)))
-     ;; All other characters.
-     (else
-      (loop (cons ch chars) (read-char port))))))
-
-;;
-;; Booleans and null parsing helpers
-;;
-
-(define (json-read-true port)
-  (expect-string port "true" #t))
-
-(define (json-read-false port)
-  (expect-string port "false" #f))
-
-(define (json-read-null port null)
-  (expect-string port "null" null))
-
-;;
-;; Main parser functions
-;;
-
-(define (json-read port null ordered)
-  (skip-whitespaces port)
-  (let ((ch (peek-char port)))
-    (cond
-     ;; Unexpected EOF.
-     ((eof-object? ch) (json-exception port))
-     ;; Read JSON values.
-     ((eqv? ch #\t) (json-read-true port))
-     ((eqv? ch #\f) (json-read-false port))
-     ((eqv? ch #\n) (json-read-null port null))
-     ((eqv? ch #\{) (json-read-object port null ordered))
-     ((eqv? ch #\[) (json-read-array port null ordered))
-     ((eqv? ch #\") (json-read-string port))
-     ;; Anything else should be a number.
-     (else (json-read-number port)))))
-
-;;
-;; Public procedures
-;;
-
-(define* (json->scm #:optional (port (current-input-port))
-                    #:key (null 'null) (ordered #f) (concatenated #f))
-  "Parse a JSON document into native. Takes one optional argument,
-@var{port}, which defaults to the current input port from where the JSON
-document is read. It also takes a few of keyword arguments: @{null}: value for
-JSON's null, it defaults to the 'null symbol, @{ordered} to indicate whether
-JSON objects order should be preserved or not (the default) and @{concatenated}
-which can be used to tell the parser that more JSON documents might come after a
-properly parsed document."
-  (let loop ((value (json-read port null ordered)))
-    ;; Skip any trailing whitespaces.
-    (skip-whitespaces port)
-    (cond
-     ;; If we reach the end the parsing succeeded.
-     ((eof-object? (peek-char port)) value)
-     ;; If there's anything else other than the end, check if user wants to keep
-     ;; parsing concatenated valid JSON documents, otherwise parser fails.
-     (else
-      (cond (concatenated value)
-            (else (json-exception port)))))))
-
-(define* (json-string->scm str #:key (null 'null) (ordered #f))
-  "Parse a JSON document into native. Takes a string argument,
-@var{str}, that contains the JSON document. It also takes a couple of keyword
-argument: @{null}: value for JSON's null, it defaults to the 'null symbol and
-@{ordered} to indicate whether JSON objects order should be preserved or
-not (the default)."
-  (call-with-input-string str (lambda (p) (json->scm p #:null null #:ordered ordered))))
-
-(define* (json-seq->scm #:optional (port (current-input-port))
-                        #:key (null 'null) (ordered #f)
-                        (handle-truncate 'skip) (truncated-object 'truncated))
-  "Lazy parse a JSON text sequence from the port @var{port}.
-This procedure returns a stream of parsed documents. The optional argument
-@var{port} defines the port to read from and defaults to the current input
-port. It also takes a few keyword arguments: @{null}: value for JSON's null
-(defaults to the 'null symbol), @{ordered} to indicate whether JSON objects
-order should be preserved or not (the default), @{handle-truncate}: defines how
-to handle data loss, @{truncated-object}: used to replace unparsable
-objects. Allowed values for @{handle-truncate} argument are 'throw (throw an
-exception), 'stop (stop parsing and end the stream), 'skip (default, skip
-corrupted fragment and return the next entry), 'replace (skip corrupted fragment
-and return @{truncated-object} instead)."
-  (letrec ((handle-truncation
-            (case handle-truncate
-              ((throw) json-exception)
-              ((stop) (const (eof-object)))
-              ((skip)
-               (lambda (port)
-                 (read-delimited "\x1e" port 'peek)
-                 (read-entry port)))
-              ((replace)
-               (lambda (port)
-                 (read-delimited "\x1e" port 'peek)
-                 truncated-object))))
-           (read-entry
-            (lambda (port)
-              (let ((ch (read-char port)))
-                (cond
-                 ((eof-object? ch) ch)
-                 ((not (eqv? ch #\rs))
-                  (handle-truncation port))
-                 (else
-                  (skip-record-separators port)
-                  (catch 'json-invalid
-                    (lambda ()
-                      (let ((next (json-read port null ordered)))
-                        (if (eqv? #\lf (peek-char port))
-                            (begin
-                              (read-char port)
-                              next)
-                            (handle-truncation port))))
-                    (lambda (_ port)
-                      (handle-truncation port)))))))))
-    (port->stream port read-entry)))
-
-(define* (json-seq-string->scm str #:key (null 'null) (ordered #f)
-                               (handle-truncate 'skip) (truncated-object 'truncated))
-  "Lazy parse a JSON text sequence from the string @var{str}.
-This procedure returns a stream of parsed documents and also takes the same
-keyword arguments as @code{json-seq->scm}."
-  (call-with-input-string str
-    (lambda (p)
-      (json-seq->scm p #:null null #:ordered ordered
-                     #:handle-truncate handle-truncate
-                     #:truncated-object truncated-object))))
-
-;;; (json parser) ends here

scm/yaml_parser.scm

@@ -1,10 +0,0 @@
-(use-modules (ice-9 popen) (ice-9 textual-ports) (json parser))
-
-(define (yml-file->scm filename)
-  (let* ((python_cmd (string-append "import sys, yaml, json; print(json.dumps(yaml.safe_load(open('" filename "'))))"))
-          (pipe (open-pipe* OPEN_READ "python" "-c" python_cmd))
-          (json (get-string-all pipe)))
-    (close-pipe pipe)
-    (json-string->scm json)))
-
-(define (parse-yml-file filename) (resolve-inherits (yml-file->scm filename)))

snippet_include.ly

@@ -1,8 +0,0 @@
-#(ly:set-option 'relative-includes #t)
-
-#(define noDefaultOutput (if (defined? 'noDefaultOutput) noDefaultOutput #f))
-
-\include #(if noDefaultOutput "void.ly" "all_base_includes.ly")
-
-#(define AUTHOR_DATA (if (defined? 'AUTHOR_DATA) AUTHOR_DATA (call-with-input-file "../data/authors.json" json->scm)))
-#(define SONG_DATA (if (defined? 'SONG_DATA) SONG_DATA (call-with-input-file "../data/songs.json" json->scm)))

standalone_output.ly

@@ -1,54 +0,0 @@
-% set the speed of the midi music
-#(define midiQuarterNoteSpeed (if (defined? 'midiQuarterNoteSpeed) midiQuarterNoteSpeed 90))
-
-MUSIC = { \transposable #TRANSPOSITION \MUSIC }
-
-verselayout = \layout {
-  \LAYOUT
-  \context {
-    \ChordNames
-    \override ChordName.font-size = \songTextChordFontSize
-  }
-}
-TEXT = \markuplist {
-  \override #`(transposition . ,TRANSPOSITION)
-  \override #`(verselayout . ,verselayout)
-  \override #`(verse-chords . ,#{ \chords { \verseChords } #})
-  \override #`(verse-reference-voice . ,#{ \global \firstVoice  #})
-  \TEXT
-}
-
-% nur Output wenn noStandaloneOutput auf false steht
-output = #(if (not noStandaloneOutput)
-#{
-  \bookpart {
-    \HEADER
-
-    \score {
-      \MUSIC
-      \layout { \LAYOUT }
-    }
-
-    \TEXT
-
-    \score {
-      \unfoldRepeats { \MUSIC \INLINESCOREMUSIC }
-      \midi {
-        \context {
-          \Score
-          % Tempo des midi files
-          tempoWholesPerMinute = #(ly:make-moment midiQuarterNoteSpeed 4)
-        }
-      }
-    }
-
-
-  }
-#}
-)
-
-% if we don't want a standalone output, cause we compile a book, we just have an empty output here,
-% so lilypond does not generate output for this song
-\book {
-  \bookpart { \output }
-}

styles.ly

@@ -1,16 +0,0 @@
-#(define bookStyle
-  (if (not (defined? 'bookStyle))
-      #f
-      bookStyle))
-
-#(define songStyle
-  (if (not (defined? 'songStyle))
-      (if (not (defined? 'defaultSongStyle)) 'default defaultSongStyle)
-      songStyle))
-
-#(if (not (boolean? bookStyle))
-         (set! songStyle bookStyle))
-
-#(define (bock-style layout props)
-  "Whether we have bockstyle or not"
-  (eq? songStyle 'bock))

swing_style.ly

@@ -1,48 +0,0 @@
-swing = \mark \markup {
-  \line \general-align #Y #DOWN {
-    \score {
-      \new Staff \with {
-        fontSize = #-2
-        \override StaffSymbol.line-count = #0
-%        \override VerticalAxisGroup.Y-extent = #'(0 . 0)
-      }
-      \relative {
-        \stemUp
-        \override Score.SpacingSpanner.common-shortest-duration = #(ly:make-moment 3 16)
-        \override Beam.positions = #'(2 . 2)
-        h'8[ h8]
-      }
-      \layout {
-        ragged-right= ##t
-        indent = 0
-        \context {
-          \Staff \remove "Clef_engraver"
-          \remove "Time_signature_engraver"
-        }
-      }
-    }
-    " ="
-    \score {
-      \new Staff \with {
-        fontSize = #-2
-        \override StaffSymbol.line-count = #0
-%        \override VerticalAxisGroup.Y-extent = #'(0 . 0)
-      }
-      \relative {
-        \stemUp
-        \override Score.SpacingSpanner.common-shortest-duration = #(ly:make-moment 3 16)
-        \override Stem.length = #4.5
-        \tuplet 3/2 { h'4 h8 }
-      }
-      \layout {
-        ragged-right= ##t
-        indent = 0
-        \context {
-          \Staff
-          \remove "Clef_engraver"
-          \remove "Time_signature_engraver"
-        }
-      }
-    }
-  }
-}

title_with_category_images.ly

@@ -1,68 +0,0 @@
-#(define-markup-command (bookTitleMarkupCustom layout props)()
-   (interpret-markup layout
-     (prepend-alist-chain 'defaultmarkup #{
-\markup {
-  \override #'(baseline-skip . 3.5)
-  \center-column {
-    \override #`(font-name . ,songTitleFont) { \fontsize #songTitleSize \fromproperty #'header:title }
-    \large \bold \fromproperty #'header:subtitle
-    \smaller \bold \fromproperty #'header:subsubtitle
-  }
-}
-                           #}
-     (prepend-alist-chain 'songfilename (chain-assoc-get 'header:songfilename props "") props))
-     (make-column-markup
-       (list
-         (make-vspace-markup (chain-assoc-get 'header:titletopspace props 0))
-         (make-customEps-markup (chain-assoc-get 'header:titlesize props 3.5) "titel.eps")
-     ))
-))
-
-#(define-markup-command (category-image layout props size category)(number? string?)
-   (interpret-markup layout props
-     (if noStandaloneOutput
-       (make-epsfileref-markup Y size
-         (category-image-path category))
-       (make-epsfile-markup Y size
-         (category-image-path category)))))
-
-#(define showCategoryImages (if (defined? 'showCategoryImages) showCategoryImages #t))
-
-#(define-markup-command (category-images layout props)()
-   (interpret-markup layout props
-     (if showCategoryImages
-       (make-line-markup (map (lambda (category) (make-category-image-markup 5 category))
-           (string-tokenize (chain-assoc-get 'header:categories props ""))))
-       (make-null-markup))))
-
-#(define pdf-encode (@@ (lily framework-ps) pdf-encode))
-% PDF tags
-#(define-markup-command (title-to-pdf-toc layout props title) (string?)
-     (ly:make-stencil
-      (list 'embedded-ps
-             (ly:format
-              "[/Action /GoTo /View [/Fit] /Title (~a) /OUT pdfmark" (pdf-encode title)))
-      empty-interval empty-interval
-      ;'(0 . 0) '(0 . 0)
-      ))
-
-#(define-markup-command (title-with-category-images layout props right)(boolean?)
-   (interpret-markup layout props
-     (let* ((title (chain-assoc-get 'header:title props #f))
-            (pdfbookmark (chain-assoc-get 'header:songfilename props title)))
-     (if title
-     ;(if (chain-assoc-get 'header:categories props #f)
-       (if right
-         #{\markup { \title-to-pdf-toc #pdfbookmark \fill-line \general-align #Y #UP { \null \bookTitleMarkupCustom \category-images } } #}
-         #{\markup { \title-to-pdf-toc #pdfbookmark \fill-line \general-align #Y #UP { \category-images \bookTitleMarkupCustom \null } } #})
-       ;#{\markup \fill-line \general-align #Y #UP { \null \bookTitleMarkupCustom \null } #})
-      ;(make-null-markup))
-      #{ \markup { " " } #})
-     )))
-
-\paper {
-  bookTitleMarkup = \markup \null
-  scoreTitleMarkup = \markup \null
-  oddHeaderMarkup = \markup { \if \on-first-page-of-part \title-with-category-images ##t }
-  evenHeaderMarkup = \markup { \if \on-first-page-of-part \title-with-category-images ##f }
-}

toc_include.ly

@@ -1,247 +0,0 @@
-% embed all category images in postscript once
-#(define-markup-list-command (embed-category-images layout props)()
-   (map (lambda (category)
-     (interpret-markup layout props
-       (markup #:epsfileembed (category-image-path (symbol->string (car category))))))
-       category-names))
-
-% print a markup-list in columns
-#(define-markup-list-command (columnlayout layout props cols margin heightpair lines) (integer? number? pair? markup-list?)
-   (let create-col-page ((line-width (- (/ (chain-assoc-get 'line-width props
-                          (ly:output-def-lookup layout 'line-width))
-                           cols) margin ))
-                         (cols cols)
-                         (height (car heightpair))
-                         (restlines lines))
-     (cons
-     (interpret-markup layout props
-       (make-fill-line-markup
-        (map (lambda (foo)
-         (make-general-align-markup Y UP (make-override-markup '(baseline-skip . 1) (make-column-markup
-          (let add-to-col ((lines restlines) (height-left height))
-            (set! restlines lines)
-            (if (null? lines)
-              '()
-              (let* ((line-to-stencil (lambda (line) (interpret-markup layout (cons (list (cons 'line-width line-width) (cons 'baseline-skip 1)) props) (markup line))))
-                     (stencil-height (lambda (stencil) (interval-length (ly:stencil-extent stencil Y))))
-                     (linestencil (line-to-stencil (car lines)))
-                     (current-line-height (stencil-height linestencil))
-                     (new-height-left (- height-left current-line-height))
-                     (next-line-height (if (null? (cdr lines)) current-line-height (stencil-height (line-to-stencil (cadr lines)))))
-                     (no-space-for-next-line (and (< next-line-height current-line-height) (< new-height-left next-line-height)))
-                     )
-                (if (or (< new-height-left 0) no-space-for-next-line)
-                  '()
-                  (cons (markup #:stencil linestencil) (add-to-col (cdr lines) new-height-left))))))))))
-          (make-list cols))))
-     (if (null? restlines)
-         (list)
-       (create-col-page line-width cols (cdr heightpair) restlines)))))
-
-%%%%%%%%%%%%%%%%%%%%%%%
-%%%Funktionen für Inhaltsverzeichnis
-% geklaut von da:
-% http://lsr.dsi.unimi.it/LSR/Snippet?id=763
-
-% Usage:
-% - define and index item with \indexItem $sortstring $markup
-% - use \indexSection $sortstring $markup to divide the index into several sections
-% - display the alphabetical index with \markuplines \index
-
-% code ist mostly taken from ./ly/toc-init.ly and just renamed and slightly modfied
-
-%% defined later, in a closure
-#(define*-public (add-index-item! markup-symbol text sorttext #:optional label) #f)
-#(define-public (index-items) #f)
-
-#(let ((index-item-list (list)))
-   (set! add-index-item!
-   (lambda* (markup-symbol text sorttext #:optional (label (gensym "index")))
-       (set! index-item-list
-       ;; We insert index items sorted from the beginning on and do
-       ;; not sort them later - this saves pretty much computing time
-       (insert-alphabetical-sorted! (list label markup-symbol text
-        ;; this crazy hack is necessary because lilypond depends on guile 1.8 atm
-        ;; and so the cool unicode conversion functions cannot be used
-          (ly:string-substitute " " ""
-          (ly:string-substitute "…" ""
-          (ly:string-substitute "Č" "C"
-          (ly:string-substitute "Đ" "D"
-          (ly:string-substitute "Т" "T"
-          (ly:string-substitute "Ä" "Ae"
-          (ly:string-substitute "ä" "ae"
-          (ly:string-substitute "Ö" "O"
-          (ly:string-substitute "ö" "oe"
-          (ly:string-substitute "Ü" "U"
-          (ly:string-substitute "ü" "ue" sorttext))))))))))))
-        index-item-list))
-       (make-music 'EventChord
-         'page-marker #t
-         'page-label label
-         'elements (list (make-music 'LabelEvent
-         'page-label label)))))
-   (set! index-items (lambda ()
-         index-item-list)))
-
-#(define (insert-alphabetical-sorted! iitem ilist)
-  (if (null? ilist)
-      (list iitem)
-      (if (string-ci<? (cadddr iitem) (cadddr (car ilist)))
-          (cons iitem ilist)
-          (cons (car ilist) (insert-alphabetical-sorted! iitem (cdr ilist))))))
-
-% code for category index
-#(define*-public (add-category-index-item! categories markup-symbol text #:optional label) #f)
-#(define-public (category-index-items) #f)
-
-#(let ((category-index-hash (make-hash-table)))
-   (set! add-category-index-item!
-   (lambda* (categories markup-symbol text #:optional (label (gensym "index")))
-     (for-each (lambda (category)
-            (let* ((catsym (string->symbol category))
-                   (catlist (hashq-ref category-index-hash catsym
-                              (list (list label 'indexCategoryMarkup category)))))
-              (if (assq catsym category-names)
-                (hashq-set! category-index-hash catsym
-                  (cons (list label markup-symbol text) catlist))
-                (ly:error "song: <~a> category ~a is not defined!" (markup->string text) category))))
-       categories)
-       (make-music 'EventChord
-         'page-marker #t
-         'page-label label
-         'elements (list (make-music 'LabelEvent
-         'page-label label)))))
-   (set! category-index-items (lambda ()
-          (append-map (lambda (kv) (reverse (hashq-ref category-index-hash (car kv) (list)))) category-names))))
-
-
-
-
-#(define-markup-command (with-link-symbol-ref layout props symbol arg)
-   (symbol? markup?)
-   "call with-link with the label referenced by symbol"
-   (let ((label (chain-assoc-get symbol props)))
-     (interpret-markup layout props
-     (markup #:with-link label arg))))
-
-#(define-markup-command (category-image-symbol-ref layout props size symbol)
-   (number? symbol?)
-   "call category-image with the category referenced by symbol"
-   (let ((category (chain-assoc-get symbol props)))
-     (interpret-markup layout props
-     (markup #:category-image size category))))
-
-#(define-markup-command (category-name-symbol-ref layout props symbol)
-   (symbol?)
-   "get the name of a category referenced by symbol"
-   (let* ((category (chain-assoc-get symbol props))
-          (catname (assq (string->symbol category) category-names)))
-     (interpret-markup layout props
-     (markup #:override (cons 'baseline-skip 3.5) (if catname (make-left-column-markup (string-split (cadr catname) #\newline)) category)))))
-
-#(define-markup-command (index-item-with-pattern layout props)()
-     (let (
-            (text (chain-assoc-get 'index:text props))
-            (page (chain-assoc-get 'index:page props))
-            (width (-
-                     (chain-assoc-get 'line-width props)
-                     (interval-length (ly:stencil-extent (interpret-markup layout props "XXXX") X))))
-            )
-     (interpret-markup layout props
-       (make-column-markup
-         (let ((revlist
-                (if (markup? text)
-                    (list text)
-                    (reverse (map (lambda (stil) (markup #:stencil stil))
-                      (wordwrap-string-internal-markup-list layout
-                        (cons (if (chain-assoc-get 'alternative text)
-                                (list (cons 'line-width width) (cons 'font-shape 'italic))
-                                (list (cons 'line-width width))) props) #f
-                        (chain-assoc-get 'rawtext text))))))
-               (target-size-markup
-                 (make-column-markup
-                   (list
-                    (make-simple-markup "Agj")
-                    (make-vspace-markup 0.2))))
-               )
-               (reverse (map (lambda (m)
-                               (make-size-box-to-box-markup #f #t m target-size-markup))
-                          (cons
-                           (make-with-link-symbol-ref-markup 'index:label (make-fill-with-pattern-markup 1 RIGHT "." (car revlist) page))
-                           (cdr revlist)))))))))
-
-\paper {
-  indexItemMarkup = \markup {
-    \index-item-with-pattern
-  }
-  indexSectionMarkup = \markup \override #'(baseline-skip . 1.5) \left-column {
-    \sans \bold \fontsize #3 \fromproperty #'index:text
-    \null
-  }
-  indexCategoryMarkup = \markup \override #'(baseline-skip . 1.5) \column {
-    \fill-line { \line { \vcenter \category-image-symbol-ref #7 #'index:text \hspace #3 \vcenter \sans \bold \fontsize #3 \category-name-symbol-ref #'index:text } \null }
-    \vspace #.4
-  }
-
-}
-
-#(define (prepare-item-markup items layout)
-   (map (lambda (index-item)
-         (let ((label (car index-item))
-               (index-markup (cadr index-item))
-               (text (caddr index-item)))
-           (markup #:override (cons 'index:label label)
-             #:override (cons 'index:page (markup #:custom-page-number label -1))
-             #:override (cons 'index:text text)
-             (ly:output-def-lookup layout index-markup))))
-       (items)))
-
-#(define-markup-list-command (index-in-columns-with-title layout props index-type title-markup) (symbol? markup?)
-  ( _i "Outputs index alphabetical sorted or in categories" )
-    (let ((items (case index-type
-            ((alphabetical) index-items)
-            ((categories) category-index-items)))
-          (title (interpret-markup layout props title-markup)))
-      (cons title
-      (interpret-markup-list layout props
-        (make-columnlayout-markup-list songTocColumns 2
-          (let ((h (- (ly:output-def-lookup layout 'paper-height) 12)))
-            (cons (- h (interval-length (ly:stencil-extent title Y))) h))
-          (prepare-item-markup items layout))))))
-
-indexItem =
-#(define-music-function (parser location sorttext text) (string? markup?)
-   "Add a line to the alphabetical index, using the @code{indexItemMarkup} paper variable markup."
-   (add-index-item! 'indexItemMarkup text sorttext))
-
-indexSection =
-#(define-music-function (parser location sorttext text) (string? markup?)
-   "Add a section line to the alphabetical index, using @code{indexSectionMarkup} paper variable markup. This can be used to divide the alphabetical index into different sections, for example one section for each first letter."
-   (add-index-item! 'indexSectionMarkup text sorttext))
-
-#(define (extract-var-from-module module sym)
-  (let ((variableref (assoc-ref module sym)))
-    (if variableref (variable-ref variableref) #f))
-  )
-
-headerToTOC = #(define-music-function (parser location header label) (ly:book? symbol?)
-    (let*
-      (
-       (headervars (hash-map->list cons (struct-ref (ly:book-header header) 0)))
-       (extract-var-and-check (lambda (headervar) (let
-                                                   ((extracted (extract-var-from-module headervars headervar)))
-                                                   (if (and extracted (not (string-null? extracted))) extracted #f)
-                                                    )))
-       (title (extract-var-and-check 'title))
-       (alttitle (extract-var-and-check 'alttitle))
-       (altalttitle (extract-var-and-check 'altalttitle))
-       (categorytitle (extract-var-and-check 'categorytitle))
-       (categories (extract-var-and-check 'categories))
-       (add-to-toc! (lambda (toctitle tocmarkup)
-                      (add-index-item! 'indexItemMarkup tocmarkup toctitle label)))
-       )
-           (if categories (add-category-index-item! (string-tokenize categories) 'indexItemMarkup (cons (list (cons 'rawtext (if categorytitle categorytitle title))) '()) label))
-           (if alttitle (add-to-toc! alttitle (cons (list (cons 'rawtext alttitle) (cons 'alternative #t)) '())))
-           (if altalttitle (add-to-toc! altalttitle (cons (list (cons 'rawtext altalttitle) (cons 'alternative #t)) '())))
-           (if title (add-to-toc! title (cons (list (cons 'rawtext title)) '())) #{ #})
-    ))