load AUTHOR_DATA via path convention

* compatibilty to Liederbuchgenerator
* apply standalone output directly to top level not wrapped in a book

all_base_includes.ly

@@ -5,6 +5,9 @@
     (load (string-append scmdir "json_parser.scm"))
     (load (string-append scmdir "resolve_inherits.scm"))
     (load (string-append scmdir "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.ly"
 \include "eps_file_from_song_dir.ly"
 \include "title_with_category_images.ly"

break_paged_output.ily

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

snippet_include.ly

@@ -3,6 +3,3 @@
 #(define noDefaultOutput (if (defined? 'noDefaultOutput) noDefaultOutput #f))
 
 \include #(if noDefaultOutput "void.ly" "all_base_includes.ly")
-
-#(define AUTHOR_DATA (if (defined? 'AUTHOR_DATA) AUTHOR_DATA (call-with-input-file "../data/authors.json" json->scm)))
-#(define SONG_DATA (if (defined? 'SONG_DATA) SONG_DATA (call-with-input-file "../data/songs.json" json->scm)))

standalone_output.ly

@@ -18,19 +18,19 @@ TEXT = \markuplist {
   \TEXT
 }
 
-% nur Output wenn noStandaloneOutput auf false steht
-output = #(if (not noStandaloneOutput)
-#{
-  \bookpart {
-    \HEADER
-
+#(if (not noStandaloneOutput)
+(begin
+  (let ((header (ly:book-header HEADER)) (paper (ly:book-paper HEADER)))
+    (if header (set! $defaultheader header))
+    (if paper (set! $defaultpaper paper))
+  )
+  (add-score #{
     \score {
       \MUSIC
       \layout { \LAYOUT }
-    }
-
-    \TEXT
-
+    }#})
+  (add-score TEXT)
+  (add-score #{
     \score {
       \unfoldRepeats { \MUSIC \INLINESCOREMUSIC }
       \midi {
@@ -40,15 +40,5 @@ output = #(if (not noStandaloneOutput)
           tempoWholesPerMinute = #(ly:make-moment midiQuarterNoteSpeed 4)
         }
       }
-    }
-
-
-  }
-#}
-)
-
-% if we don't want a standalone output, cause we compile a book, we just have an empty output here,
-% so lilypond does not generate output for this song
-\book {
-  \bookpart { \output }
-}
+    }#})
+))