refactor include system

private_includes/base/all.ily

@@ -0,0 +1,49 @@
+#(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 "json_parser.scm")
+    (scm-load "resolve_inherits.scm")
+    (scm-load "yaml_parser.scm")))
+#(define AUTHOR_DATA (if (defined? 'AUTHOR_DATA) AUTHOR_DATA (parse-yml-file "../../lilypond-song-includes/data/authors.yml")))
+#(define SONG_DATA (if (defined? 'SONG_DATA) SONG_DATA (parse-yml-file "../../lilypond-song-includes/data/songs.yml")))
+
+\include "basic_format_and_style_settings.ily"
+\include "eps_file_from_song_dir.ily"
+\include "title_with_category_images.ily"
+\include "chord_settings.ily"
+\include "transposition.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
+
+verseChords = {}
+firstVoice = {}
+global = {}

private_includes/base/arrows_in_scores.ily

@@ -0,0 +1,63 @@
+%%%%%%%%%%%%%%%%% Pfeilezeugs
+% http://lilypond.org/doc/v2.19/Documentation/snippets/vocal-music
+#(define-markup-command (arrow-at-angle layout props angle-deg length fill)
+   (number? number? boolean?)
+   (let* (
+           (PI-OVER-180 (/ (atan 1 1) 34))
+           (degrees->radians (lambda (degrees) (* degrees PI-OVER-180)))
+           (angle-rad (degrees->radians angle-deg))
+           (target-x (* length (cos angle-rad)))
+           (target-y (* length (sin angle-rad))))
+     (interpret-markup layout props
+       (markup
+        #:translate (cons (/ target-x 2) (/ target-y 2))
+        #:rotate angle-deg
+        #:translate (cons (/ length -2) 0)
+        #:concat (#:draw-line (cons length 0)
+                   #:arrow-head X RIGHT fill)))))
+
+
+splitStaffBarLineMarkup = \markup \with-dimensions #'(0 . 0) #'(0 . 0) {
+  \combine
+  \arrow-at-angle #45 #(sqrt 8) ##t
+  \arrow-at-angle #-45 #(sqrt 8) ##t
+}
+
+splitStaffBarLine = {
+  \once \override Staff.BarLine.stencil =
+  #(lambda (grob)
+     (ly:stencil-combine-at-edge
+      (ly:bar-line::print grob)
+      X RIGHT
+      (grob-interpret-markup grob splitStaffBarLineMarkup)
+      0))
+  \break
+}
+
+convDownStaffBarLine = {
+  \once \override Staff.BarLine.stencil =
+  #(lambda (grob)
+     (ly:stencil-combine-at-edge
+      (ly:bar-line::print grob)
+      X RIGHT
+      (grob-interpret-markup grob #{
+        \markup\with-dimensions #'(0 . 0) #'(0 . 0) {
+          \translate #'(0 . -.13)\arrow-at-angle #-45 #(sqrt 8) ##t
+        }#})
+      0))
+  \break
+}
+
+convUpStaffBarLine = {
+  \once \override Staff.BarLine.stencil =
+  #(lambda (grob)
+     (ly:stencil-combine-at-edge
+      (ly:bar-line::print grob)
+      X RIGHT
+      (grob-interpret-markup grob #{
+        \markup\with-dimensions #'(0 . 0) #'(0 . 0) {
+          \translate #'(0 . .14)\arrow-at-angle #45 #(sqrt 8) ##t
+        }#})
+      0))
+  \break
+}

private_includes/base/basic_format_and_style_settings.ily

@@ -0,0 +1,255 @@
+\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) ", ")))))
+}
+
+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 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
+    \override Accidental.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 Accidental.color = #grey
+  \override NoteHead.layer = 1
+  \override Dots.layer = 1
+  \override Stem.layer = 1
+  \override Flag.layer = 1
+  \override Beam.layer = 1
+  \override Accidental.layer = 1
+}
+
+firstVoiceStyle = {
+  \override NoteHead.color = #black
+  \override Dots.color = #black
+  \override Stem.color = #black
+  \override Flag.color = #black
+  \override Beam.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 #})
+
+override-stanza =
+#(define-music-function (parser location stanzanumber) (number?)
+#{
+  \once \override StanzaNumber.forced-spacing = #stanzanumber % misuse property "forced-spacing" to override the stanzanumber
+#}
+)
+
+#(define (stanza . stanzanumbers)
+#{
+  \once \override StanzaNumber.layer = 23 % set this to signal that there is a real stanza and no repeat signs
+  \applyContext
+  #(lambda (context)
+    (let* ((stanzanumber-override (ly:assoc-get 'forced-spacing (ly:context-grob-definition context 'StanzaNumber) #f))
+           (stanza-style (ly:assoc-get 'style (ly:context-grob-definition context 'StanzaNumber)))
+           (stanza-format (lambda (stanzanumber) (format #f (if (eq? stanza-style 'roman) romanStanzaFormat stanzaFormat) stanzanumber))))
+        (ly:context-set-property! context 'stanza
+          (string-join (map stanza-format
+                            (if stanzanumber-override (list stanzanumber-override) stanzanumbers))
+                        ", "))))
+#}
+)
+
+ref =
+#(define-music-function (stanzanumbers lyrics) ((number-list? (list)) ly:music?)
+#{ \lyricmode {
+    \once \override StanzaNumber.layer = 23 % set this to signal that there is a real stanza and no repeat signs
+    \set stanza = #(make-on-the-fly-markup (lambda (layout props m) ((ly:output-def-lookup layout 'refMarkupFormatter) layout props stanzanumbers)) (make-null-markup))
+    #lyrics
+  }
+#}
+)
+
+% 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 } #})
+
+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
+       \set stanza = #text
+     }
+   #})
+ruf =
+#(define-music-function (text) (string?)
+   (rufWithMarkup (make-ruf-style-markup text)))

private_includes/base/chord_settings.ily

@@ -0,0 +1,217 @@
+% Akkorde können auch geklammert sein
+#(define (parenthesis-ignatzek-chord-names in-pitches bass inversion context)
+(markup #:line ( "(" (ignatzek-chord-names in-pitches bass inversion context) ")" )))
+klamm = #(define-music-function (parser location chords) (ly:music?)
+#{
+	\set chordNameFunction = #parenthesis-ignatzek-chord-names
+	$chords
+	\set chordNameFunction = #ignatzek-chord-names
+#})
+
+repeats-around-chords =
+#(define-music-function (parser location chords) (ly:music?)
+#{
+  \once \set noChordSymbol = \markup { \normal-text \repStart }
+  r4
+	$chords
+  \once \set noChordSymbol = \markup { \normal-text \repStop }
+  r4
+#})
+
+bchord =
+#(define-music-function (parser location chords) (ly:music?)
+#{
+	\override ChordName.font-series = #'bold
+	$chords
+	\revert ChordName.font-series
+#})
+
+shiftChord = #(define-music-function (parser location xshift chord) (number? ly:music?)
+#{
+	\once \override ChordName.extra-offset = #`(,xshift . 0)
+	$chord
+#})
+
+shiftChords = #(define-music-function (parser location xshift chords) (number? ly:music?)
+#{
+	\override ChordName.extra-offset = #`(,xshift . 0)
+	$chords
+#})
+
+altChord =
+#(define-music-function (parser location mainchord altchord) (ly:music? ly:music?)
+  (let* ((remove-point-and-click
+           (lambda (grob)
+             (ly:grob-set-property! grob 'cause #f)
+             (ly:text-interface::print grob)))
+         (chord-name (lambda (in-pitches bass inversion context) #{
+           \markup {
+             \translate #'(-0.5 . 0)
+             \score {
+               \chords { \transposable #(cons (car (music-pitches mainchord)) (car in-pitches)) { #(music-clone mainchord) \klamm #(music-clone altchord) } }
+               \layout {
+                 \LAYOUT
+                 \context {
+                   \ChordNames
+                   \override ChordName.extra-spacing-width = #'(0 . 0.3)
+                   \override ChordName.stencil = #remove-point-and-click
+                 }
+                 \context {
+                   \Score
+                   \override SpacingSpanner.spacing-increment = 0
+                 }
+               }
+             }
+           }#})))
+    #{
+      \once \set chordNameFunction = #chord-name
+      #mainchord
+    #}))
+
+% 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))
+
+% 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)) ))))
+)
+
+% additional bass notes should get uppercased
+#(define (bassnote-name->german-markup-nosym pitch lowercase?)(note-name->german-markup-nosym 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
+  (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
+    chordNoteNamer = #bassnote-name->german-markup-nosym
+    majorSevenSymbol = "maj7"
+    chordNameExceptions = \chordNameExceptions
+  }
+}
+
+% Akkord mit Bunddiagramm anzeigen
+#(define-markup-command (fret-chord layout props fret chord) (string? string?)
+   (interpret-markup layout props
+     #{ \markup { \override #'(baseline-skip . 2)
+          \center-column {
+            \score { \new ChordNames {
+              #(ly:parser-include-string (string-append "\\chordmode { s4 " chord " }"))
+            } \layout { \generalLayout } }
+            \override #'(fret-diagram-details . ((barre-type . straight))) {
+              \fret-diagram-terse #fret
+            }
+          }
+        }
+     #}))
+
+% If you add this engraver to ChordNames Context chords get only printed on chordchanges and if its the first chord after line break.
+Ensure_first_chord_after_line_break_printed_engraver =
+  #(lambda (ctx)
+     (define last-system-column-rank 0)
+     (make-engraver
+      (acknowledgers
+       ((chord-name-interface this-engraver grob source-engraver)
+          (ly:grob-set-property! grob 'after-line-breaking
+            (lambda (grob)
+              (let ((current-system-column-rank (car (ly:grob-spanned-column-rank-interval (ly:grob-system grob)))))
+                (if (and
+                       (ly:context-property ctx 'chordChanges #f)
+                       (ly:grob-property grob 'begin-of-line-visible #f)
+                       (not (= last-system-column-rank current-system-column-rank)))
+                  ; 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)
+                )))))))
+
+% If you add this engraver to ChordNames Context chords get only printed on chordchanges and not at newline.
+Ignoring_newline_chord_changes_engraver =
+  #(lambda (ctx)
+     (make-engraver
+      (acknowledgers
+       ((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/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 +1,73 @@
+\paper {
+  poetPrefix = "Worte:"
+  composerPrefix = "Weise:"
+  compositionPrefix = "Satz:"
+  adaptionPrefix = "Bearbeitung:"
+  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)))
+              (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 paragraph) } #}))
+                      (ly:regex-split (ly:make-regex "\n[ \t\n]*\n[ \t\n]*") text)))
+                  '()))))
+          (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) "")))
+                (string-with-paragraphs->markuplist "" infotext)
+                (string-with-paragraphs->markuplist "Übersetzung: " translation)
+                (string-with-paragraphs->markuplist "Aussprache: " pronunciation)
+                  )))))
+      (make-null-markup)
+    )
+}

private_includes/base/default_style.ily

@@ -0,0 +1,35 @@
+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."
+romanStanzaFormat = "~@r."
+refString = "Ref.:"
+refStringWithNumbers = "Ref. ~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/eps_file_from_song_dir.ily

@@ -0,0 +1,18 @@
+% 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))
+           (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 defaulttitlemarkup
+                 defaulttitlemarkup
+                 (ly:format "file does not exist ~a" filepath))
+))))

private_includes/base/footer_with_songinfo.ily

@@ -0,0 +1,240 @@
+#(use-modules (ice-9 receive))
+#(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-markup-command (print-songinfo 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* (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) " " (default-author-format poetId)))
+
+  (define (format-composer composerId)
+    (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) " " (default-author-format authorId)))
+
+  (define (numbered-contribution-prefix contributionNumbers prefixLookup)
+    (string-append
+      (string-join (map (lambda (contributionNumber) (ly:format "~a." contributionNumber)) contributionNumbers) ", ")
+      " "
+      (ly:output-def-lookup layout prefixLookup)
+    )
+  )
+
+  (define referencedAuthors '())
+
+  (define (format-authors authorIds)
+    (map (lambda (authorId)
+      (default-author-format
+        authorId
+        (if (member authorId referencedAuthors)
+          #t
+          (begin
+            (set! referencedAuthors (cons authorId referencedAuthors))
+            #f)))
+    ) authorIds)
+  )
+
+  (define (render-contribution-group contributionPrefix authorIds)
+    (if (null? authorIds)
+      ""
+      (string-append contributionPrefix " " (string-join (format-authors authorIds) ", ")))
+  )
+
+  (define (join-present items joiner)
+    (string-join (filter (lambda (item) (and (string? item) (not (string-null? (string-trim-both item))))) items) joiner)
+  )
+
+  (define (render-partial-contribution-group prefixLookup authorData)
+    (if (null? authorData)
+      ""
+      (let ((firstAuthorContributions (cdar authorData)))
+        (receive (authorDataSame authorDataOther)
+            (partition (lambda (authorEntry) (equal? (cdr authorEntry) firstAuthorContributions)) authorData)
+          (join-present (list
+            (render-contribution-group (numbered-contribution-prefix firstAuthorContributions prefixLookup) (map car authorDataSame))
+            (render-partial-contribution-group prefixLookup authorDataOther)
+            ) " ")))))
+
+  (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))
+            (adaptionIds (find-author-ids-by 'adaption 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))
+            (year_adaption (chain-assoc-get 'header:year_adaption props #f))
+            )
+        (if (and (equal? poetIds composerIds) (null? translatorIds) (null? versePoetData) (null? verseComposerData) (null? voiceComposerData) (null? compositionIds) (null? adaptionIds) (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? adaptionIds) (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
+                  ) ", ")
+                  (join-present (list
+                    (render-contribution-group (ly:output-def-lookup layout 'adaptionPrefix) adaptionIds)
+                    year_adaption
+                  ) ", ")
+                  (render-contribution-group (ly:output-def-lookup layout 'bridgePrefix) bridgeIds)
+                  (render-contribution-group (ly:output-def-lookup layout 'interludePrefix) interludeIds)
+                ) "; ")
+              )))))
+      (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))
+           (poetId (chain-assoc-get 'header:poetId props (if songId (songinfo-from songId "poet") #f)))
+           (composerId (chain-assoc-get 'header:composerId props (if songId (songinfo-from songId "composer") #f)))
+           (poet-and-composer-same (equal? poetId composerId)))
+      (let ((infotext (chain-assoc-get 'header:infotext props (chain-assoc-get 'header:songinfo props #f)))
+            (poet-maybe-with-composer (chain-assoc-get 'header:poet props (if poetId (if poet-and-composer-same (format-poet-and-composer poetId) (format-poet poetId)) (car poet-and-composers))))
+            (composer (chain-assoc-get 'header:composer props (if (and composerId (not poet-and-composer-same)) (format-composer composerId) (cadr poet-and-composers))))
+            (copyright (chain-assoc-get 'header:copyright props #f))
+            (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))))
+            (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))
+              #:override (cons 'songinfo:composer
+                (if (and composer (not (and (string? composer) (string-null? composer)))) composer #f))
+              #:override (cons 'songinfo:copyright
+                (if (and copyright (not (and (string? copyright) (string-null? copyright)))) copyright #f))
+              #:override (cons 'songinfo:infotext
+                (if (and infotext (not (and (string? infotext) (string-null? infotext)))) infotext #f))
+              #:override (cons 'songinfo:translation
+                (if (and translation (not (and (string? translation) (string-null? translation)))) translation #f))
+              #:override (cons 'songinfo:pronunciation
+                (if (and pronunciation (not (and (string? pronunciation) (string-null? pronunciation)))) pronunciation #f))
+              #:override (cons 'songinfo:year_text
+                (if (and year_text (not (and (string? year_text) (string-null? year_text)))) year_text #f))
+              #:override (cons 'songinfo:year_melody
+                (if (and year_melody (not (and (string? year_melody) (string-null? year_melody)))) year_melody #f))
+              #:override '(baseline-skip . 3.0)
+              #:fontsize songInfoFontSize
+              #:sans
+              (ly:output-def-lookup layout 'songinfoMarkup)
+            )))
+      (make-null-markup)))
+)
+
+#(define-markup-command (print-pagenumber layout props)()
+  (let ((label (chain-assoc-get 'header:myindexlabel props #f)))
+   (interpret-markup layout props
+     (markup #:large #:bold
+        (if label
+         (make-custom-page-number-markup label (chain-assoc-get 'page:page-number props 0))
+         (make-fromproperty-markup 'page:page-number-string)
+        )
+   ))))
+
+#(define-markup-command (fractional-line-width layout props arg)(markup?)
+  (interpret-markup layout props
+    (make-override-markup
+      `(line-width . ,(* (chain-assoc-get 'header:songinfo-size-factor props songInfoLineWidthFraction) (ly:output-def-lookup layout 'line-width)))
+      arg)))
+
+\paper {
+  print-first-page-number = ##t
+  first-page-number = #0
+
+  oddFooterMarkup = \markup {
+    \fill-line {
+      \line { \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 { \if \on-last-page-of-part \general-align #Y #DOWN \fractional-line-width \print-songinfo }
+      \line { \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

@@ -0,0 +1,13 @@
+INLINESCOREMUSIC = {}
+
+inline-score =
+#(define-music-function (music) (ly:music?)
+   (set! INLINESCOREMUSIC #{ \INLINESCOREMUSIC #music #})
+    #{
+      \transposable #TRANSPOSITION #music
+    #})
+
+fill-midi =
+#(define-void-function (music) (ly:music?)
+   (set! INLINESCOREMUSIC #{ \INLINESCOREMUSIC #music #})
+)

private_includes/base/scm/json_parser.scm

@@ -0,0 +1,482 @@
+;;; (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

private_includes/base/scm/resolve_inherits.scm

@@ -0,0 +1,22 @@
+(define (resolve-inherit-entry-in-list alist entry)
+  (let* ((key (car entry))
+        (attributes (cdr entry))
+        (inherits (assoc-ref attributes "inherits")))
+    (if inherits
+      (let* ((alist-without-entry (alist-delete key alist))
+            (inherit-entry (assoc inherits alist-without-entry))
+            (inherits-attributes (if inherit-entry (alist-copy (cdr (resolve-inherit-entry-in-list alist-without-entry inherit-entry)))))
+            (override-attributes (alist-delete "inherits" attributes)))
+        (if inherit-entry
+          (begin
+            (for-each (lambda (attribute) (assoc-set! inherits-attributes (car attribute) (cdr attribute))) override-attributes)
+            (cons key inherits-attributes)
+          )
+          (ly:error "~a can not inherit from ~a" key inherits))
+      )
+      entry
+    )))
+
+(define (resolve-inherits alist)
+  (map (lambda (entry) (resolve-inherit-entry-in-list alist entry)) alist)
+)

private_includes/base/scm/yaml_parser.scm

@@ -0,0 +1,25 @@
+(if (not windows?) (use-modules (ice-9 popen)))
+(use-modules (ice-9 textual-ports) (json parser))
+
+; We use Python to convert the data yamls like the authors.yml to json, that we can parse in scheme.
+; Windows does not like Pipes, so we use a tmpfile instead.
+; Be sure you have PyYAML installed. On Windows that could be done for example like "py -m pip install PyYAML"
+(define (yml-file->scm filename)
+  (if windows?
+    (let* ((port (make-tmpfile #f))
+            (tmpfilepath (port-filename port))
+            (ignore (close-port port))
+            (python_code (string-append "import sys, yaml, json; f = open(r'" tmpfilepath "', 'w'); f.write(json.dumps(yaml.safe_load(open(r'" filename "')))); f.close()"))
+            (status (system (string-append (search-executable '("python3" "python" "py")) " -X utf8 -c \"" python_code "\"")))
+            (readport (open-file tmpfilepath "r" #:encoding "UTF-8"))
+            (json (get-string-all readport)))
+      (close-port readport)
+      (delete-file tmpfilepath)
+      (json-string->scm (if (status:exit-val status) json "{}")))
+    (let* ((python_code (string-append "import sys, yaml, json; print(json.dumps(yaml.safe_load(open(r'" filename "'))))"))
+            (pipe (open-pipe (string-append "PYTHONHOME='' " (search-executable '("python3" "python" "py")) " -X utf8 -c \"" python_code "\"") OPEN_READ))
+            (json (get-string-all pipe)))
+      (close-pipe pipe)
+      (json-string->scm json))))
+
+(define (parse-yml-file filename) (resolve-inherits (yml-file->scm filename)))

private_includes/base/swing_style.ily

@@ -0,0 +1,121 @@
+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"
+        }
+      }
+    }
+  }
+}
+
+swingOff = \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 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 (parser location 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 +1,64 @@
+#(define-markup-command (bookTitleMarkupCustom layout props)()
+   (interpret-markup layout
+     (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 [/XYZ -4 currentpagedevice /PageSize get 1 get 4 add null] /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 ""))
+            (starttext (chain-assoc-get 'header:starttext props #f))
+            (pdfbookmark (if starttext (string-append starttext " | " title) title)))
+     (if title
+       (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 { " " } #})
+     )))
+
+\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 }
+  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

@@ -0,0 +1,22 @@
+TRANSPOSITION = #(cons #f #f)
+
+transposeGlobal =
+#(define-void-function (from to) (ly:pitch? ly:pitch?)
+   (set! TRANSPOSITION (cons from to)))
+
+transposable =
+#(define-music-function (fromto music) (pair? ly:music?)
+  (if (car fromto)
+    #{
+      \transpose #(car fromto) #(cdr fromto) #music
+    #}
+    music))
+
+% Akkorde in Strophen transponieren
+#(define-markup-list-command (transpose layout props from to markuplist)
+  (markup? markup? markup-list?)
+
+  (define (markup->pitch m)
+    (ly:assoc-get (string->symbol (markup->string m)) pitchnames))
+
+  (interpret-markup-list layout (prepend-alist-chain 'transposition (cons (markup->pitch from) (markup->pitch to)) props) markuplist))

private_includes/base/verses_with_chords.ily

@@ -0,0 +1,352 @@
+% parsing line by line
+#(define-markup-command (wrap-newline layout props text) (string?)
+   "Text Zeile für Zeile parsen"
+   (interpret-markup layout props
+     #{ \markup { \column {
+     $(let ((verse-markup-string (
+        string-append "\\line { "
+          (ly:regex-replace (ly:make-regex "\r?\n") text " } \\line { ")
+          " \\size-box-to-box ##f ##t \"\" \"Agj\" }" )))
+       (ly:parser-include-string verse-markup-string))
+     }}#}
+   )
+)
+
+#(define-markup-command (size-box-to-box layout props use-x use-y abox bbox)
+  (boolean? boolean? markup? markup?)
+  (let* ((ma (interpret-markup layout props abox))
+         (mb (interpret-markup layout props bbox))
+         (ax (ly:stencil-extent ma X))
+         (ay (ly:stencil-extent ma Y))
+         (bx (ly:stencil-extent mb X))
+         (by (ly:stencil-extent mb Y))
+         (halfdiffabx (* (- (interval-length bx) (interval-length ax)) 0.5)))
+    (ly:stencil-translate (ly:make-stencil (ly:stencil-expr ma)
+                     (if use-x
+                          (if (< halfdiffabx 0)
+                              (cons
+                                (- (interval-bound ax DOWN) halfdiffabx)
+                                (+ (interval-bound ax UP) halfdiffabx))
+                              bx)
+                       ax)
+                     (if use-y by ay))
+      (cons (if (and use-x (< halfdiffabx 0)) halfdiffabx 0) 0) )))
+
+#(define-markup-command (size-box-to-box-left-aligned layout props use-x use-y abox bbox)
+  (boolean? boolean? markup? markup?)
+  (let* ((ma (interpret-markup layout props abox))
+         (mb (interpret-markup layout props bbox))
+         (ax (ly:stencil-extent ma X))
+         (ay (ly:stencil-extent ma Y))
+         (bx (ly:stencil-extent mb X))
+         (by (ly:stencil-extent mb Y)))
+    (ly:make-stencil (ly:stencil-expr ma)
+                     (if use-x bx ax)
+                     (if use-y by ay))
+    ))
+
+#(define-markup-command (size-box-to-box-style-dependent layout props use-x use-y abox bbox)
+   (boolean? boolean? markup? markup?)
+   (interpret-markup layout props
+   (case songTextChordAlignment
+     ((center) (make-size-box-to-box-markup use-x use-y abox bbox))
+     ((left) (make-size-box-to-box-left-aligned-markup use-x use-y abox bbox)))))
+
+#(define-markup-command (chord-alignment-style-dependent layout props chord-with-text) (markup?)
+   (interpret-markup layout props
+   (case songTextChordAlignment
+     ((center) (make-center-align-markup chord-with-text))
+     ((left) (make-left-align-markup chord-with-text)))))
+
+% Text über Text mittig darstellen
+#(define-markup-command (textup layout props text uptext) (markup? markup?)
+   "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 } }
+         }
+         #text
+       }
+     #}
+   )))
+
+#(define-markup-command (anchor-x-between layout props arga argb)
+   (markup? markup?)
+   (let* ((la (interval-length (ly:stencil-extent (interpret-markup layout props arga) X)))
+          (m (interpret-markup layout props (markup #:general-align Y DOWN arga argb (make-size-box-to-box-markup #t #t (markup #:null) arga))))
+          (l (interval-length (ly:stencil-extent m X))))
+            (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)))
+   (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 } }
+         #}
+     ))))
+
+#(define-markup-command (stanza layout props arg)
+   (string-or-music?)
+   (interpret-markup layout props
+     (make-size-box-to-box-markup #f #t (make-stanza-raw-markup arg) (make-stanza-raw-markup "x"))))
+
+#(define (handle-custom-newlines custom-verse-breaks text)
+  (if (null? custom-verse-breaks)
+    text
+    (let make-custom-linebreaks
+      ((break-words custom-verse-breaks)
+       (newtext (ly:regex-replace (ly:make-regex "\r?\n") text " ")))
+      (if (null? break-words)
+          newtext
+          (make-custom-linebreaks
+            (cdr break-words)
+            (ly:regex-replace
+              (ly:make-regex
+                (string-append
+                  "("
+                  (string-concatenate
+                    (map
+                      (lambda (character)
+                        (let ((escaped_char (ly:regex-quote (string character))))
+                             (string-append "(?: *,[^,)]+\\)" escaped_char "|\\(?" escaped_char ")")))
+                      (string->list (car break-words))))
+                  "(?: *,[^,)]+\\))?)(.*)$"))
+              newtext
+              1 "\n" 2))))))
+
+#(use-modules (lily display-lily))
+
+% Kompletten Vers mit Akkorden
+#(define-markup-command (chordverse layout props stanza verse) (string-or-music? string?)
+   #:properties (
+    (intraverse-vspace 0)
+    (custom-verse-breaks '())
+    (transposition (cons #f #f))
+    (verselayout generalLayout)
+    )
+   "Vers mit Akkorden"
+   (let ((transp (if (car transposition)
+                    (string-append "\\transpose " (symbol->string (note-name->lily-string (car transposition))) " " (symbol->string (note-name->lily-string (cdr transposition))))
+                    "")))
+   (interpret-markup layout props
+     (markup #:override `(baseline-skip . ,(+ intraverse-vspace songTextLineHeigth)) #:anchor-x-between #:stanza stanza
+       (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 } }")
+                )
+     ))))
+
+% Kompletter Vers aus dem Akkorde entfernt werden
+#(define-markup-command (nochordverse layout props stanza verse) (string-or-music? string?)
+   #:properties ((intraverse-vspace 0)(custom-verse-breaks '()))
+   "Vers ohne Akkorde"
+   (interpret-markup layout props
+     (markup #:override `(baseline-skip . ,(+ intraverse-vspace 3.0)) #:anchor-x-between #:stanza stanza
+           #:wrap-newline (ly:regex-replace (ly:make-regex "\\(([^,]*),([^)]*)\\)") (handle-custom-newlines custom-verse-breaks verse) 1)
+     )
+   )
+)
+
+#(define-markup-command (verseformat layout props verse) (markup?)
+   #:properties ((verselayout generalLayout))
+   "Textformatierung für Strophen"
+   (interpret-markup layout props
+     (let* (
+         (layout-scale (ly:output-def-lookup layout 'output-scale 1.0))
+         (verselayout-scale (ly:output-def-lookup verselayout 'output-scale layout-scale))
+         (mag-scale (/ verselayout-scale layout-scale))
+         (lyric-context-props (ly:context-def-lookup (ly:assoc-get 'Lyrics (ly:output-find-context-def verselayout 'Lyrics)) 'property-ops))
+         (lyric-size (caddr (find (lambda (prop) (and (equal? 'push (car prop)) (equal? 'LyricText (cadr prop)) (equal? 'font-size (cadddr prop)))) lyric-context-props)))
+       )
+       (make-magnify-markup mag-scale (make-sans-markup (make-fontsize-markup lyric-size verse)))
+     )
+   )
+)
+
+#(define-markup-command (group-verses layout props versegroup) (markup-list?)
+   #:properties ((verse-cols 1)
+                 (verse-vspace 1)
+                 (verse-hspace 1)
+                 (verse-ordering-horizontal #f))
+   "Gruppiere Strophen in einem Markup auf Wunsch spaltenweise"
+   (define (add-markup-between-elements reverses markup-between elements)
+     ((if reverses fold fold-right) (lambda (element filled-list)
+              (cons element (if (null? filled-list) '() (cons markup-between filled-list))))
+        '() elements))
+   (let* ((column-item-count (ceiling (/ (length versegroup) verse-cols)))
+          (column-data (make-list verse-cols)))
+    (let columnize-list ((index 0) (items versegroup))
+      (if (not (null? items))
+        (let* ((column-index (if verse-ordering-horizontal
+                                 (modulo index verse-cols)
+                                 (floor (/ index column-item-count))))
+               (column-markups (list-ref column-data column-index)))
+          (list-set! column-data column-index (cons (car items) column-markups))
+          (columnize-list (+ index 1) (cdr items)))))
+    (interpret-markup layout props
+      (make-fill-line-markup (list (make-verseformat-markup (make-line-markup
+        (add-markup-between-elements #f
+          (make-hspace-markup verse-hspace)
+          (map (lambda (column-markups)
+              (make-column-markup
+                (add-markup-between-elements #t (make-vspace-markup verse-vspace) column-markups)))
+            column-data)))))))))
+
+#(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))))
+
+#(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-with-indents layout props lines)
+  (markup-list?)
+  #:category music
+  #: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."
+  ;; See also similar code in Lyric_performer.
+  (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))
+                                    text))))
+
+#(define-markup-command (chordlyrics layout props lyrics) (ly:music?)
+   #:properties ((verse-chords #{#})
+                 (verse-reference-voice #{#})
+                 (verse-break-voice #{#})
+                 (verse-text-chord-distance songTextChordDistance)
+                 (transposition (cons #f #f))
+                 (verselayout generalLayout))
+  "Vers mit Akkorden"
+  (interpret-markup layout props
+    #{
+      \markup {
+        \score-equal-height-with-indents \score-lines {
+          <<
+            \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
+            #(let
+              ((custom-size (ly:output-def-lookup verselayout 'size #f)))
+              (if custom-size (layout-set-staff-size custom-size)))
+            ragged-right = ##t
+            \context {
+              \Lyrics
+              \override VerticalAxisGroup.nonstaff-relatedstaff-spacing.basic-distance = #verse-text-chord-distance
+              \override LyricText.parent-alignment-X = #LEFT
+              \override LyricText.self-alignment-X = #LEFT
+              \override LyricText.word-space = 0.8
+              \override LyricSpace.minimum-distance = 0.8
+              \override LyricText.stencil = #custom-lyric-text::print
+            }
+            \context {
+              \ChordNames
+              \override VerticalAxisGroup.staff-affinity = ##f
+              \override ChordName.extra-spacing-width = #'(-0.1 . 0.1)
+              \consists \Ensure_first_chord_after_line_break_printed_engraver
+            }
+            \context {
+              \Score
+              \override PaperColumn.keep-inside-line = ##f
+             % \override SpacingSpanner.strict-note-spacing = ##t
+              \override SpacingSpanner.uniform-stretching = ##t
+              \override SpacingSpanner.spacing-increment = 0
+              \remove Bar_number_engraver
+              \remove Mark_engraver
+              \remove Jump_engraver
+              \remove Volta_engraver
+              \remove Parenthesis_engraver
+              \remove Metronome_mark_engraver
+            }
+            \context {
+              \Staff
+              \remove Staff_symbol_engraver
+              \remove Clef_engraver
+              \remove Time_signature_engraver
+              \remove Bar_engraver
+              \remove Separating_line_group_engraver
+              \omit KeySignature
+              \omit KeyCancellation
+            }
+            \context {
+              \Voice
+              \remove Stem_engraver
+              \remove Rest_engraver
+              \remove Multi_measure_rest_engraver
+              \remove Phrasing_slur_engraver
+              \remove Slur_engraver
+              \remove Tie_engraver
+              \remove Dynamic_engraver
+              \remove Note_heads_engraver
+              \remove Script_engraver
+            }
+            \context {
+              \NullVoice
+              \consists Rest_engraver
+              \omit Rest
+              \undo \omit NoteHead
+              \hide NoteHead
+              \override NoteHead.X-extent = #'(0 . 0)
+            }
+          }
+        }
+      }
+    #}
+  )
+)
+
+#(define-markup-command (nochordlyrics layout props lyrics) (ly:music?)
+    "Vers ohne Akkorde"
+  (interpret-markup layout props
+    (markup
+      #:override `(verse-chords . ,#{#})
+      #:override `(verse-line-height . ,(- songTextLineHeigth 2))
+      #:chordlyrics lyrics))
+)

private_includes/book/appendix.ily

@@ -0,0 +1,44 @@
+appendix =
+#(define-void-function (parser location title) (markup?)
+  (define (appendix-item->markup layout props appendix-item)
+    (interpret-markup layout props
+      (markup
+          #:override (cons 'appendixItem:heading (assoc-ref appendix-item "heading"))
+          #:override (cons 'appendixItem:text (assoc-ref appendix-item "text"))
+          (ly:output-def-lookup layout 'appendixItemMarkup))))
+  (ly:book-add-bookpart! (ly:parser-lookup '$current-book)
+  #{
+    \bookpart {
+      \markup { #title }
+      #(for-each
+          (lambda (item)
+            (add-score (ly:make-page-label-marker (string->symbol (car item))))
+            (add-text
+              (make-on-the-fly-markup
+                (lambda (layout props arg) (appendix-item->markup layout props (cdr item)))
+                (make-null-markup)))
+          )
+        (reverse APPENDIX_DATA))
+    }
+  #}))
+
+#(define-markup-command (appendix-ref layout props label) (symbol?)
+  "call page-ref to appendix-item"
+  (interpret-markup layout props
+    (markup #:with-link label
+      #:override (cons 'appendixPage (make-page-ref-markup label "888" "?"))
+      (ly:output-def-lookup layout 'appendixReferenceMarkup))))
+
+\paper {
+  appendixItemMarkup = \markup {
+    \left-column {
+      \line { \large \bold \fromproperty #'appendixItem:heading }
+      \vspace #0.2
+      \sans \wordwrap-field #'appendixItem:text
+      \vspace #0.7
+    }
+  }
+  appendixReferenceMarkup = \markup {
+    \fromproperty #'appendixPage
+  }
+}

private_includes/book/book_include.ily

@@ -0,0 +1,371 @@
+#(define song-list '())
+#(define song-number 0)
+
+#(define (files-in-directory dirname)
+      ;;; Generate list containing filenames
+      (let ((dir (opendir dirname)))
+        (let next ((f (readdir dir))
+    	       (files '()))
+          (cond ((eof-object? f)
+    	     (closedir dir)
+    	     files)
+    	    (else
+    	     (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)))
+
+
+#(define additional-page-switch-label-list '())
+#(define additional-page-numbers #f)
+
+normalPageNumbers =
+#(define-void-function (parser location) ()
+  (set! additional-page-numbers #f)
+)
+additionalPageNumbers =
+#(define-void-function (parser location) ()
+  (set! additional-page-numbers #t)
+)
+
+#(define (real-page-number layout label)
+  (let ((table (ly:output-def-lookup layout 'label-page-table)))
+        (if (list? table)
+            (assoc-get label table)
+            #f))
+  )
+
+#(define display-pages-list '())
+#(define (build-display-pages-list layout)
+  (if (null? display-pages-list)
+    (let calculate-display-page ((switch-label-list additional-page-switch-label-list))
+      (let* ((label (caar switch-label-list))
+             (is-additional (cdar switch-label-list))
+             (real-page (real-page-number layout label))
+             (rest-switch-label-list (cdr switch-label-list))
+             (display-page (if (null? rest-switch-label-list)
+               (if is-additional (- real-page 1) real-page)
+               (let* ((previous-label (caar rest-switch-label-list))
+                      (previous-is-additional (cdar rest-switch-label-list))
+                      (previous-display-page (calculate-display-page rest-switch-label-list)))
+                  (+ previous-display-page
+                    (if previous-is-additional
+                      (if is-additional 0 1)
+                      (if is-additional
+                          (- (- real-page (real-page-number layout previous-label)) 1)
+                          (- real-page (real-page-number layout previous-label)))
+                    )
+                  )
+               )
+             ))
+      )
+      (set! display-pages-list (acons label display-page display-pages-list))
+      display-page
+    )))
+  display-pages-list
+)
+
+
+#(define-markup-command (custom-page-number layout props label real-current-page-number)
+  (symbol? number?)
+  #:category other
+  "
+@cindex referencing page number, in text
+
+Reference to a page number.  @var{label} is the label set on the referenced
+page (using the @code{\\label} command), @var{gauge} a markup used to estimate
+the maximum width of the page number, and @var{default} the value to display
+when @var{label} is not found.
+
+(If the current book or bookpart is set to use roman numerals for page numbers,
+the reference will be formatted accordingly -- in which case the @var{gauge}'s
+width may require additional tweaking.)"
+  (let* ((gauge-stencil (interpret-markup layout props "XXX"))
+         (x-ext (ly:stencil-extent gauge-stencil X))
+         (y-ext (ly:stencil-extent gauge-stencil Y)))
+    (ly:stencil-outline
+     (ly:make-stencil
+      `(delay-stencil-evaluation
+        ,(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))
+                        (page-markup
+                          (if (assq-ref additional-page-switch-label-list label)
+                              (make-concat-markup (list (number-format 'arabic 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)))
+                                       (if (cdadr rest-additional-page-switch-label-list)
+                                           (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))))
+                          ))
+                        (page-stencil (interpret-markup layout props page-markup))
+                        (gap (- (interval-length x-ext)
+                                (interval-length (ly:stencil-extent page-stencil X)))))
+                   (interpret-markup layout props
+                                     (make-line-markup
+                                      (list
+                                       (make-hspace-markup gap)
+                                       page-markup)))))))
+      x-ext
+      y-ext)
+     (make-filled-box-stencil x-ext y-ext))))
+
+
+includeSong =
+#(define-void-function (parser location filename) (string?)
+     #{
+     \bookOutputName #filename
+     #}
+    (ly:parser-parse-string (ly:parser-clone)
+      (ly:format "\\include \"~a/~a/~a.ly\"" songPath filename filename))
+    (let ((label (gensym "index")))
+      (set! additional-page-switch-label-list
+        (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-pages
+                    (map (lambda (text)
+                      #{ \markuplist \setsongfilename $filename $text #})
+                      TEXT_PAGES)
+                    '())))))
+          song-list))
+    ))
+
+blankpage =
+#(define-void-function (parser location) ()
+    (set! song-list
+      (acons 'emptyPage
+        '()
+        song-list)))
+
+imagepage =
+#(define-void-function (parser location xsize filename) (number? string?)
+    (set! song-list
+      (acons 'imagePage
+        (acons 'xsize xsize (acons 'filename filename '()))
+        song-list)))
+
+#(define-markup-command (pagecenter layout props stuff)(markup?)
+   (interpret-markup layout props
+     (let ((halfpaperheight (/ (ly:output-def-lookup layout 'paper-height) 2))
+           (halfstuffheight (/ (interval-length (ly:stencil-extent (interpret-markup layout props stuff) Y)) 2)))
+       (make-fill-line-markup (list (make-pad-to-box-markup '(0 . 0) (cons (- (- halfpaperheight halfstuffheight)) (+ halfpaperheight halfstuffheight)) stuff)))
+   )))
+
+songs =
+#(define-void-function (parser location) ()
+ (for-each (lambda (songitems)
+   (ly:book-add-bookpart! (ly:parser-lookup '$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* ((newnumber (+ 1 song-number))
+                 (header #{ \bookpart { $(assq-ref songvars 'header) \header {
+                   songfilename = $(symbol->string filename)
+                   myindexlabel = #(assq-ref songvars 'label)
+                   songnumber = #(number->string newnumber)
+                 } } #})
+                 (music (assq-ref songvars 'music))
+                 (layout (assq-ref songvars 'layout))
+                 (text-pages (assq-ref songvars 'text-pages))
+                 (label (assq-ref songvars 'label)))
+            (set! song-number newnumber)
+            #{
+              \bookpart {
+                $header
+                \headerToTOC #header #label
+                \score { $music \layout { $layout } }
+                $(add-text-pages text-pages)
+              }
+            #}))))))
+   (reverse song-list)
+   ))
+
+#(define (boernel-stats)
+   (let (
+          (songs (map (lambda (song) (symbol->string (car song))) (alist-delete 'emptyPage song-list)))
+          (opticalline "---------------------------------------------------------"))
+   (ly:warning (string-join (list
+     opticalline
+     (string-concatenate (list "Inkludiert: " (number->string (length songs)) " Lieder\n"))
+     ;(string-join songs "\n")
+     "Nicht inkludiert:"
+     opticalline
+     (string-join (sort-list (lset-difference string=? (files-in-directory songPath) songs) string<?) "\n")
+     opticalline
+     ) "\n" )
+)))
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%% Include Images once and reference them:
+#(define bbox-regexp
+  (ly:make-regex "%%BoundingBox:[ \t]+([0-9-]+)[ \t]+([0-9-]+)[ \t]+([0-9-]+)[ \t]+([0-9-]+)"))
+
+#(define (get-postscript-bbox string)
+  "Extract the bbox from STRING, or return #f if not present."
+  (let*
+      ((match (ly:regex-exec bbox-regexp string)))
+
+    (if match
+        (map (lambda (x)
+               (string->number (ly:regex-match-substring match x)))
+             (cdr (iota 5)))
+
+        #f)))
+
+
+#(define eps-references '())
+
+#(define-public (eps-file-ref->stencil axis size just-embed file-name)
+  (let*
+      ((already-embedded (assq (string->symbol file-name) eps-references))
+       (counter (if already-embedded (cadr already-embedded) (if (null-list? eps-references) 1 (+ 1 (cadar eps-references)))))
+       (form-name (ly:format "IDForm~a" counter))
+       (data-name (ly:format "ImageData~a" counter))
+       (eps-content (ly:gulp-file file-name))
+       (contents (ly:format "~a execform" form-name))
+       (bbox (if already-embedded (cddr already-embedded) (get-postscript-bbox (car (string-split eps-content #\nul)))))
+       (bbox-size (if (= axis X)
+                      (- (list-ref bbox 2) (list-ref bbox 0))
+                      (- (list-ref bbox 3) (list-ref bbox 1))
+                      ))
+       (factor (if (< 0 bbox-size)
+                   (exact->inexact (/ size bbox-size))
+                   0))
+       (scaled-bbox
+        (map (lambda (x) (* factor x)) bbox))
+       ;; We need to shift the whole eps to (0,0), otherwise it will appear
+       ;; displaced in lilypond (displacement will depend on the scaling!)
+       (translate-string (ly:format "~a ~a translate" (- (list-ref bbox 0)) (- (list-ref bbox 1))))
+       (clip-rect-string (ly:format
+                          "~a ~a ~a ~a rectclip"
+                          (list-ref bbox 0)
+                          (list-ref bbox 1)
+                          (- (list-ref bbox 2) (list-ref bbox 0))
+                          (- (list-ref bbox 3) (list-ref bbox 1)))))
+
+    (if (not already-embedded) (set! eps-references
+                                     (acons (string->symbol file-name) (cons counter bbox) eps-references)))
+    (if bbox
+        (ly:make-stencil
+         (list
+          'embedded-ps
+          (string-append
+           (if (and already-embedded (not just-embed)) "" (ly:format
+            "
+/~a
+currentfile
+<< /Filter /SubFileDecode
+   /DecodeParms << /EODCount 0 /EODString (*EOD*) >>
+>> /ReusableStreamDecode filter
+~a
+*EOD*
+def
+
+/~a
+<< /FormType 1
+   /BBox [~a ~a ~a ~a]
+   /Matrix [ 1 0 0 1 0 0]
+   /PaintProc
+   { pop
+       /ostate save def
+         /showpage {} def
+         /setpagedevice /pop load def
+         ~a 0 setfileposition ~a cvx exec
+       ostate restore
+   } bind
+>> def
+" data-name eps-content form-name (list-ref bbox 0) (list-ref bbox 1) (list-ref bbox 2) (list-ref bbox 3) data-name data-name))
+           (if just-embed "" (ly:format
+            "
+gsave
+currentpoint translate
+BeginEPSF
+~a dup scale
+~a
+~a
+%%BeginDocument: ~a
+~a
+%%EndDocument
+EndEPSF
+grestore
+"         factor translate-string  clip-rect-string file-name contents
+))))
+         ;; Stencil starts at (0,0), since we have shifted the eps, and its
+         ;; size is exactly the size of the scaled bounding box
+         (if just-embed '(0 . 0) (cons 0 (- (list-ref scaled-bbox 2) (list-ref scaled-bbox 0))))
+         (if just-embed '(0 . 0) (cons 0 (- (list-ref scaled-bbox 3) (list-ref scaled-bbox 1)))))
+
+        (ly:make-stencil "" '(0 . 0) '(0 . 0)))
+    ))
+
+#(define-markup-command (epsfileref layout props axis size file-name)
+  (number? number? string?)
+  #:category graphic
+  "
+@cindex inlining an Encapsulated PostScript image
+
+Inline an EPS image.  The image is scaled along @var{axis} to
+@var{size}.
+
+@lilypond[verbatim,quote]
+\\markup {
+  \\general-align #Y #DOWN {
+    \\epsfile #X #20 #\"context-example.eps\"
+    \\epsfile #Y #20 #\"context-example.eps\"
+  }
+}
+@end lilypond"
+  (if (ly:get-option 'safe)
+      (interpret-markup layout props "not allowed in safe")
+      (eps-file-ref->stencil axis size #f file-name)
+      ))
+
+#(define-markup-command (epsfileembed layout props file-name)
+  (string?)
+  #:category graphic
+  "
+@cindex inlining an Encapsulated PostScript image
+
+Inline an EPS image.  The image is scaled along @var{axis} to
+@var{size}.
+
+@lilypond[verbatim,quote]
+\\markup {
+  \\general-align #Y #DOWN {
+    \\epsfile #X #20 #\"context-example.eps\"
+    \\epsfile #Y #20 #\"context-example.eps\"
+  }
+}
+@end lilypond"
+  (if (ly:get-option 'safe)
+      (interpret-markup layout props "not allowed in safe")
+      (eps-file-ref->stencil X 30 #t file-name)
+      ))

private_includes/book/toc_include.ily

@@ -0,0 +1,445 @@
+% 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 "Š" "S"
+          (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))))
+
+% 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 text #:optional (label (gensym "index")))
+     (for-each (lambda (authorID)
+            (let* ((authorsym (string->symbol authorID))
+                   (authorlist (hashq-ref author-index-hash authorsym
+                              (list (list label 'indexAuthorMarkup authorID)))))
+                (hashq-set! author-index-hash authorsym
+                  (cons (list label markup-symbol text) 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))))))))
+
+
+#(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
+  }
+}
+
+#(define (prepare-item-markup items layout)
+   (map (lambda (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))))
+       (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)
+            ((authors) author-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 'rawtext text '()) sorttext))
+
+#(define (extract-and-check-vars-from-header bookheader varlist)
+  (let* ((headervars (hash-map->list cons (struct-ref (ly:book-header bookheader) 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)))
+
+headerToTOC = #(define-music-function (parser location header label) (ly:book? symbol?)
+    (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))
+            (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) (map car voiceComposerData) compositionIds adaptionIds bridgeIds interludeIds))
+    ))
+    (let*
+      (
+       (extractedheadervars (extract-and-check-vars-from-header header '(title starttext alttitle categorytitle categories authors songnumber)))
+       (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))
+       (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 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) #{ #})
+    ))
+
+
+%% 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)
+    (let ((song-lines (map (lambda (song)
+            (let* ((filename (symbol->string (car song)))
+                   (songvars (cdr song))
+                   (page-number (number->string (assoc-get (assq-ref songvars 'label) labelPageTable)))
+                   (extractedheadervars (extract-and-check-vars-from-header (assq-ref songvars 'header)
+                      '(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))
+                   (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)))
+              (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 (map car versePoetData)))
+                  (format-authors translatorIds)
+                  (format-authors (append composerIds compositionIds adaptionIds bridgeIds interludeIds (map car voiceComposerData) (map car verseComposerData)))
+                  (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)
+                  (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))
+              ))))
+            (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"
+        "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-table)))
+        (generate-toc-csv (if (list? table) table '()))
+        empty-stencil)))))

private_includes/void.ily

@@ -0,0 +1,5 @@
+% this is just an empty dummy file to make conditional includes work so that relative pathes could be used
+% this is working if #(ly:set-option 'relative-includes #t) was set:
+% \include #(if condition relative/path/to/file.ly void.ly)
+% but this does not work:
+% #(if condition (ly:parser-include-string "\\include \"relative/path/to/file.ly\""))