allow inherits in json file

all_base_includes.ly

@@ -1,7 +1,8 @@
 #(define noStandaloneOutput (if (defined? 'noStandaloneOutput) noStandaloneOutput #f))
 
-#(if (defined? 'LAYOUT) #f (load "json_parser.scm"))
+#(if (defined? 'LAYOUT) #f (load (string-append (dirname (current-filename)) file-name-separator-string "json_parser.scm")))
 #(use-modules (json parser))
+\include "resolve_inherits.ly"
 \include "basic_format_and_style_settings.ly"
 \include "eps_file_from_song_dir.ly"
 \include "title_with_category_images.ly"

basic_format_and_style_settings.ly

@@ -147,4 +147,15 @@ repStopWithTag = \lyricmode {
     \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 = "-"
 }

chord_settings.ly

@@ -138,3 +138,44 @@ generalLayout = \layout {
           }
         }
      #}))
+
+% If you add this engraver to ChordNames Context chords get only printed on chordchanges and not at newline.
+% See https://lists.gnu.org/archive/html/lilypond-user/2020-07/msg00187.html
+Ignoring_newline_chord_changes_engraver =
+  #(lambda (ctx)
+    (let* ((chord #f)
+           (last-chord #f))
+
+   (define (at-line-beginning? grob)
+     (let* ((col (ly:item-get-column grob))
+            (ln (ly:grob-object col 'left-neighbor))
+            (col-to-check (if (ly:grob? ln) ln col)))
+       (and (eq? #t (ly:grob-property col-to-check 'non-musical))
+            (= 1 (ly:item-break-dir col-to-check)))))
+
+     (make-engraver
+      (acknowledgers
+       ((chord-name-interface this-engraver grob source-engraver)
+
+         (if chord
+             (begin
+               (set! last-chord chord)
+               (set! chord #f)))
+
+         (set! chord (ly:grob-property grob 'text))
+
+         ;; If two subsequent chords are equal and chordChanges is enabled,
+         ;; set 'after-line-breaking to a procedure which sets the stencil
+         ;; to an empty-stencil if the new chord is at line-start.
+         (if (and (equal? chord last-chord)
+                  (ly:context-property ctx 'chordChanges #f))
+             (ly:grob-set-property! grob 'after-line-breaking
+               (lambda (grob)
+                 (if (at-line-beginning? grob)
+                     (ly:grob-set-property! grob 'stencil empty-stencil))
+                 ;; keep default
+                 (ly:chord-name::after-line-breaking grob))))))
+      ((finalize this-engraver)
+        ;; house keeping
+        (set! chord #f)
+        (set! last-chord #f)))))

resolve_inherits.ly

@@ -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)
+)

verses_with_chords.ly

@@ -277,6 +277,7 @@
               \ChordNames
               \override VerticalAxisGroup.staff-affinity = ##f
               \override ChordName.extra-spacing-width = #'(-0.1 . 0.1)
+              \consists \Ignoring_newline_chord_changes_engraver
             }
             \context {
               \Score