new engraver for spacing in chordlyrics

private_includes/base/all.ily

@@ -19,7 +19,6 @@
         (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")))

private_includes/base/scm/json_parser.scm

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

private_includes/base/scm/yaml_parser.scm

@@ -1,25 +1,154 @@
-(if (not windows?) (use-modules (ice-9 popen)))
+(use-modules (ice-9 rdelim) (ice-9 regex) (ice-9 pretty-print) (srfi srfi-1))
-(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.
+;; Hauptparsingfunktion
-; 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))
+  ;; Utility: Zeile einlesen
-            (tmpfilepath (port-filename port))
+  (define (read-lines filename)
-            (ignore (close-port port))
+    (call-with-input-file filename
-            (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()"))
+      (lambda (port)
-            (status (system (string-append (search-executable '("python3" "python" "py")) " -X utf8 -c \"" python_code "\"")))
+        (let loop ((lines '()))
-            (readport (open-file tmpfilepath "r" #:encoding "UTF-8"))
+          (let ((line (read-line port)))
-            (json (get-string-all readport)))
+            (if (eof-object? line)
-      (close-port readport)
+                (reverse lines)
-      (delete-file tmpfilepath)
+                (let ((clean (string-trim line)))
-      (json-string->scm (if (status:exit-val status) json "{}")))
+                  (if (or (string=? clean "---") (string-null? clean))
-    (let* ((python_code (string-append "import sys, yaml, json; print(json.dumps(yaml.safe_load(open(r'" filename "'))))"))
+                      (loop lines) ;; Ignoriere "---" oder leere Zeile
-            (pipe (open-pipe (string-append "PYTHONHOME='' " (search-executable '("python3" "python" "py")) " -X utf8 -c \"" python_code "\"") OPEN_READ))
+                      (loop (cons line lines))))))))))
-            (json (get-string-all pipe)))
+
-      (close-pipe pipe)
+  ;; Einrückung bestimmen (Anzahl Leerzeichen am Anfang)
-      (json-string->scm json))))
+  (define (line-indent line)
+    (let ((match (string-match "^ *" line)))
+      (if match
+          (match:end match)  ; Anzahl der Leerzeichen = Position nach Leerzeichen
+          0)))               ; Falls kein Match → 0
+
+  ;; Kommentar entfernen
+  (define (strip-comment line)
+    (let ((m (string-match "#.*" line)))
+      (if m
+          (string-trim-right (string-take line (match:start m)))
+          line)))
+
+  ;; Hilfsfunktion: Whitespace entfernen
+  (define (clean-line line)
+    (string-trim (strip-comment line)))
+
+  ;; Ist Zeile leer (nach Entfernen von Kommentar & Whitespace)?
+  (define (blank-or-comment? line)
+    (string-null? (clean-line line)))
+
+  ;; Skalare Werte interpretieren
+  (define (parse-scalar str)
+    (define (strip-quotes s)
+      (cond
+       ((and (string-prefix? "\"" s) (string-suffix? "\"" s))
+        (string-drop-right (string-drop s 1) 1))
+       ((and (string-prefix? "'" s) (string-suffix? "'" s))
+        (string-drop-right (string-drop s 1) 1))
+       (else s)))
+    (let ((s (strip-quotes (string-trim str))))
+      (cond
+       ((string=? s "{}") '())  ;; leere Map
+       ((string=? s "[]") '())  ;; leere Liste
+       ((string-match "^[0-9]+$" s) (string->number s))
+       ((string=? s "true") #t)
+       ((string=? s "false") #f)
+       ((string=? s "null") '())
+       (else s))))
+
+
+  ;; Hilfsfunktion: Zeilen mit gleicher oder höherer Einrückung sammeln
+  (define (take-indented lines min-indent)
+    (let loop ((ls lines) (acc '()))
+      (if (null? ls)
+          (reverse acc)
+          (let ((line (car ls)))
+            (if (or (blank-or-comment? line)
+                    (>= (line-indent line) min-indent))
+                (loop (cdr ls) (cons line acc))
+                (reverse acc))))))
+
+  ;; Hilfsfunktion: N Zeilen überspringen
+  (define (drop lst n)
+    (let loop ((l lst) (i n))
+      (if (or (zero? i) (null? l))
+          l
+          (loop (cdr l) (- i 1)))))
+
+  ;; Listenparsing: Liest Zeilen mit `-` als Listeneinträge
+  (define (parse-list lines current-indent)
+    (let loop ((ls lines) (result '()))
+      (if (null? ls)
+          (reverse result)
+          (let* ((line (clean-line (car ls))))
+            (if (string-match "^-" line)
+                (let* ((indent (line-indent (car ls)))
+                       (item-str (string-trim (string-drop line 1)))
+                       (next-lines (cdr ls)))
+                  (if (or (null? next-lines)
+                          (> (line-indent (car next-lines)) indent))
+                      ;; Verschachtelter Inhalt
+                      (let* ((sub (take-indented next-lines (+ indent 2)))
+                             (parsed (if (null? sub)
+                                         (parse-scalar item-str)
+                                         (parse-lines sub (+ indent 2))))
+                             (remaining (drop next-lines (length sub))))
+                        (loop remaining (cons parsed result)))
+                      ;; Einfacher Skalar
+                      (loop next-lines (cons (parse-scalar item-str) result))))
+                ;; Nicht mehr Teil der Liste
+                (reverse result))))))
+
+  ;; Hauptparser für Key-Value oder Listen
+  (define (parse-lines lines current-indent)
+    (let loop ((ls lines) (result '()))
+      (if (null? ls)
+          (reverse result)
+          (let* ((raw-line (car ls))
+                 (line (clean-line raw-line)))
+            (cond
+             ;; Kommentar oder leere Zeile
+             ((blank-or-comment? raw-line)
+              (loop (cdr ls) result))
+
+             ;; Liste
+             ((string-match "^- " line)
+              (let ((list-lines (take-indented ls current-indent)))
+                (let ((parsed-list (parse-list list-lines current-indent)))
+                  (loop (drop ls (length list-lines))
+                        (cons parsed-list result)))))
+
+             ;; Key: Value
+             ((string-match "^[^:]+:" line)
+              (let* ((kv (string-split line #\:))
+                     (key (string-trim (car kv)))
+                     (value-str (string-trim (string-join (cdr kv) ":")))
+                     (next-lines (cdr ls)))
+                (if (string-null? value-str)
+                    ;; Wert auf nachfolgender Einrückungsebene
+                    (let* ((sub (take-indented next-lines (+ current-indent 2)))
+                           (parsed (parse-lines sub (+ current-indent 2)))
+                           (remaining (drop next-lines (length sub))))
+                      (loop remaining
+                            (cons (cons key parsed) result)))
+                    ;; Einfacher Key:Value
+                    (loop next-lines
+                          (cons (cons key (parse-scalar value-str)) result)))))
+
+             ;; Fehlerhafte Zeile
+             (else
+               ;; Vermeide Fehlermeldung für Leerzeilen oder leere Objekte
+               (if (or (string-null? (string-trim line))
+                       (member line '("{}" "[]")))
+                   (loop (cdr ls) result)
+                   (begin
+                     (format (current-error-port)
+                             "Syntaxfehler: Ungültige Zeile: ~a\n" raw-line)
+                     (loop (cdr ls) result))))
+             )))))
+
+  (let ((lines (read-lines filename)))
+    (parse-lines lines 0)))
 
 (define (parse-yml-file filename) (resolve-inherits (yml-file->scm filename)))

private_includes/base/verses_with_chords.ily

@@ -253,6 +253,113 @@
                                     (make-pad-right-markup -0.1 (make-tied-lyric-markup text))
                                     text))))
 
+Chord_lyrics_spacing_engraver =
+#(lambda (ctx)
+   (let ((last-note-head #f)
+         (note-head-extended #f)
+         (last-lyric-syllable-width 0)
+         (lyric-width-since-last-chord 0)
+         (notes-on-syllable-count 0)
+         (last-chord-name #f)
+         (remaining-chord-width 0)
+         (last-rest #f)
+         (rest-count 0)
+         (multi-measure-rest-count 0)
+         (stanza-shift 0))
+     (make-engraver
+      (listeners
+       ((multi-measure-rest-event engraver event)
+        (set! multi-measure-rest-count (+ multi-measure-rest-count 1))
+        )
+       ((break-event engraver event)
+        (set! last-note-head #f)
+        (set! note-head-extended #f)
+        (set! last-lyric-syllable-width 0)
+        (set! lyric-width-since-last-chord 0)
+        (set! notes-on-syllable-count 0)
+        (set! last-chord-name #f)
+        (set! remaining-chord-width 0)
+        (set! last-rest #f)
+        (set! rest-count 0)
+        (set! multi-measure-rest-count 0)
+        (set! stanza-shift 0)
+        ))
+      (acknowledgers
+       ((note-head-interface this-engraver grob source-engraver)
+        (if (and (> rest-count 0) (not last-note-head))
+            (let ((rest-spacing-on-line-start 1.2))
+              (ly:grob-set-property! grob 'minimum-X-extent (cons (- rest-spacing-on-line-start) 0))
+              (set! stanza-shift rest-spacing-on-line-start)
+              ))
+        (set! notes-on-syllable-count (+ 1 notes-on-syllable-count))
+        (set! last-note-head grob)
+        (set! note-head-extended #f)
+        (set! last-rest #f)
+        (set! rest-count 0)
+        (set! multi-measure-rest-count 0)
+        )
+       ((lyric-syllable-interface this-engraver grob source-engraver)
+        (set! remaining-chord-width (max 0 (- remaining-chord-width lyric-width-since-last-chord)))
+        (set! last-lyric-syllable-width (- (cdr (ly:grob-extent grob grob X)) 0.2))
+        (set! lyric-width-since-last-chord (+ lyric-width-since-last-chord last-lyric-syllable-width))
+        (if last-note-head (set! notes-on-syllable-count 1))
+        )
+       ((chord-name-interface this-engraver grob source-engraver)
+        (if (not (and
+                  (boolean? (ly:grob-property grob 'begin-of-line-visible))
+                  (ly:grob-property grob 'begin-of-line-visible)))
+            (let ((on-a-rest (> rest-count 0)))
+              (if (not on-a-rest)
+                  (set! notes-on-syllable-count (- notes-on-syllable-count 1)))
+              (if (and last-chord-name (= multi-measure-rest-count 1) (> lyric-width-since-last-chord remaining-chord-width))
+                  (ly:grob-set-property! last-chord-name 'extra-spacing-width (cons -0.1 (+ 0.1 (- lyric-width-since-last-chord remaining-chord-width)))))
+              (if last-note-head
+                  (let* ((last-note-min-x-extent (ly:grob-property last-note-head 'minimum-X-extent))
+                         (last-note-min-x-lower (if (pair? last-note-min-x-extent) (car last-note-min-x-extent) 0))
+                         (last-note-min-x-upper (if (pair? last-note-min-x-extent) (cdr last-note-min-x-extent) 0)))
+                    (if on-a-rest
+                        (begin
+                         (if (not note-head-extended)
+                             (begin
+                              (ly:grob-set-property! last-note-head 'minimum-X-extent
+                                                     (cons last-note-min-x-lower (- last-lyric-syllable-width -2 (* 2.2 rest-count))))
+                              (set! note-head-extended #t)
+                              ))
+                         (ly:grob-set-property! last-rest 'minimum-X-extent (cons 0 2))
+                         )
+                        (if (and (> lyric-width-since-last-chord 0)
+                                 (> remaining-chord-width lyric-width-since-last-chord))
+                            (ly:grob-set-property! last-note-head 'minimum-X-extent
+                                                   (cons (- -1.2 (- remaining-chord-width lyric-width-since-last-chord)) last-note-min-x-upper))
+                            (let* ((width-per-note-head 0.5)
+                                   (note-width-since-last-chord (* width-per-note-head notes-on-syllable-count)))
+                              (if (> remaining-chord-width note-width-since-last-chord)
+                                  (ly:grob-set-property! last-note-head 'minimum-X-extent
+                                                         (cons (- note-width-since-last-chord remaining-chord-width) last-note-min-x-upper))
+                                  )
+                              )
+                            )
+                        )))
+              (set! last-chord-name grob)
+              (set! remaining-chord-width
+                    (if (and on-a-rest (equal? (ly:prob-property (ly:grob-property grob 'cause) 'duration) (ly:prob-property (ly:grob-property last-rest 'cause) 'duration)))
+                        0
+                        (cdr (ly:grob-extent grob grob X))))
+              (set! lyric-width-since-last-chord 0)
+              (set! notes-on-syllable-count (if on-a-rest 0 1))
+              ))
+        )
+       ((rest-interface this-engraver grob source-engraver)
+        (set! rest-count (+ 1 rest-count))
+        (set! last-rest grob)
+        (set! multi-measure-rest-count 0)
+        )
+       ((stanza-number-interface this-engraver grob source-engraver)
+        (ly:grob-set-property! grob 'padding (+ 1 stanza-shift)))
+       ))))
+
+%#(ly:set-option 'debug-skylines #t)
+
 #(define-markup-command (chordlyrics layout props lyrics) (ly:music?)
    #:properties ((verse-chords #{#})
                  (verse-reference-voice #{#})
@@ -280,6 +387,7 @@
             \context {
               \Lyrics
               \override VerticalAxisGroup.nonstaff-relatedstaff-spacing.basic-distance = #verse-text-chord-distance
+              \override VerticalAxisGroup.nonstaff-relatedstaff-spacing.padding = #(- verse-text-chord-distance songTextChordDistance)
               \override LyricText.parent-alignment-X = #LEFT
               \override LyricText.self-alignment-X = #LEFT
               \override LyricText.word-space = 0.8
@@ -298,6 +406,8 @@
              % \override SpacingSpanner.strict-note-spacing = ##t
               \override SpacingSpanner.uniform-stretching = ##t
               \override SpacingSpanner.spacing-increment = 0
+              %\override SpacingSpanner.packed-spacing = ##t
+              \consists \Chord_lyrics_spacing_engraver
               \remove Bar_number_engraver
               \remove Mark_engraver
               \remove Jump_engraver
@@ -331,9 +441,10 @@
               \NullVoice
               \consists Rest_engraver
               \omit Rest
+              \override Rest.X-extent = #'(0 . 0)
               \undo \omit NoteHead
               \hide NoteHead
-              \override NoteHead.X-extent = #'(0 . 0)
+              \override NoteHead.X-extent = #'(0 . 0.5)
             }
           }
         }