Swap lilypond out for abcm2ps, which is much easier to integrate with.

peppermint.guiconfig.json

@@ -25,7 +25,7 @@
 	"parser_ext_renderers": { "type": "parserext", "description": "Used by the parsedown parser as an object mapping fenced code block languages to their respective external renderers. Should be in the form <code>language_code</code> → <code>external renderer definition</code>. See the default for examples on how to define an external renderer. Warning: On Windows, the enforcement of strict time limits is not possible. Beware of DoS attacks!", "default": {
 		"nomnoml": {
 			"name": "nomnoml",
-			"description": "The nomnoml UML diagram renderer. Requires the nomnoml npm package to be globally installed.",
+			"description": "The nomnoml UML diagram renderer. Requires the 'nomnoml' npm package to be globally installed.",
 			"url": "http://nomnoml.com/",
 			"cli": "nomnoml {input_file} {output_file} 0",
 			"cli_mode": "file",
@@ -39,12 +39,12 @@
 			"cli_mode": "pipe",
 			"output_format": "image/svg+xml"
 		},
-		"lilypond": {
+		"abc": {
-			"name": "LilyPond",
+			"name": "ABC Notation",
-			"description": "A music notation typesetter. Requires lilypond to be installed. WARNING: Don't enable lilypond if you allow anonymous edits. While every effort has been made to close loopholes, a DoS attack may still be possible against your server.",
+			"description": "A simple music notation typesetter. Much easier to understand than Lilypond. Requires abcm2ps to be installed.",
-			"url": "http://lilypond.org/manuals.html",
+			"url": "https://abcnotation.com/",
-			"cli": "lilypondzzzzzz --silent -ddelete-intermediate-files -dbackend=eps -dresolution=600 --output {output_file} {input_file}",
+			"cli": "abcm2ps -g -O - -",
-			"cli_mode": "file",
+			"cli_mode": "pipe",
 			"output_format": "image/svg+xml"
 		},
 		"latexserver": {

test.ly

@@ -0,0 +1,179 @@
+% From https://superuser.com/q/96970/164168
+% TODO: Figure out how to induce lilypond to execute this *first*
+\paper {
+  indent = 0\mm
+  line-width = 200\mm
+  oddHeaderMarkup = ""
+  evenHeaderMarkup = ""
+  oddFooterMarkup = ""
+  evenFooterMarkup = ""
+}
+
+
+% Created on Sun Feb 26 14:01:54 PST 2012
+\version "2.14.0"
+
+\header {
+	title = "I'll Walk With You" 
+ 	composer = "Carol Lynn Pearson and Reid N Nibley" 
+ 	
+ 	%tagline = "169"
+}
+\paper {
+ oddFooterMarkup = \markup { "Childrens Songbook 140-141" } 
+ 
+}
+
+\include "predefined-ukulele-fretboards.ly"
+ 
+mynotes = {
+	  
+	s2. fis4
+	d e fis g
+	e e8 d e2
+	b4 cis8  d e4 fis
+	d d d fis
+	<d a'>4 g2 <cis, a'>4
+	<d fis>2. fis4
+	d e fis g
+	e e8 d e2
+	b4 cis8 d e4 fis
+	d d d fis
+	<d a'>4 g2 <cis, a'>4
+	<d fis>2. d4
+	<d g> fis e e
+	<d a'> g fis fis
+	e fis g a
+	<e b'>2 cis
+	d1 (
+	d2.) r4
+	<fis d'>4 b <d, b'> cis'
+	<cis, a'> a' <cis, a'> a'
+	<e c'> a <c, a'> b'
+	d, d d fis
+	<d a'> g2 <cis, a'>4
+	<d fis>1
+	fis4 e fis e 
+	e e a e 
+	e d e d 
+	<d g> a' b g
+	<cis, fis>4 e2 fis4
+	d1
+	<d a'>4 g2 <cis, a'>4
+	<d fis>2. d4
+	<d g> fis e e 
+	<d a'> g fis fis 
+	e fis g a 
+	<d, e b'>2 <cis cis'> 
+	<d d'>1
+	
+	
+}
+
+myFretChords = {
+	\chordmode {
+	 d e:m g a:7 b:m e:7 a d:7 a:m
+	
+	}	
+}
+\score{
+	<<
+	\new ChordNames {
+      \myFretChords
+    }
+    \new FretBoards {
+      \set Staff.stringTunings = #ukulele-tuning
+      \myFretChords
+    }
+>>
+}
+
+
+\score { 
+	<<
+	
+		
+		
+	\new ChordNames {
+		\chordmode { 
+			d1 s  e:m
+			g2 a:7 d1 g2 a:7 d1
+			s e:m g2 a:7 d1
+			g2 a:7 d1 e:m d
+			e:m s2 a:7 d1
+			s
+			b2:m e:7 
+			a1 a2:m d:7 g1 e2:m a:7 d1
+			e:7 a d:7 g
+			 a:7 d g2 a:7
+			 d1 e:m
+			 d1 e:m s2 a:7 d1
+			
+		}
+
+	}
+	
+	\new Staff {
+		
+		\time 4/4		
+		\clef treble
+		%\transpose cis d {
+		\key d \major
+		\relative c' { 	
+		 % Type notes here 
+		  \mynotes			
+		}	
+		% }
+	}
+	
+	
+	
+	\addlyrics {
+		%verse 1
+		  
+		  If you don't walk as most peo -- ple do,
+Some peo -- ple walk a -- way from you,
+But I won't! I won't!
+If you don't talk as most peo -- ple do,
+Some peo -- ple talk and laugh at you,
+But I won't! I won't!
+I'll walk with you. I'll talk with you.
+That's how I'll show my love for you.
+Je -- sus walked a -- way from none.
+He gave his love to ev -- 'ry -- one.
+So I will! I will!
+Je -- sus blessed all he could see,
+Then turned and said, Come, fol -- low me.
+And I will! I will!
+I will! I will!
+I'll walk with you. I'll talk with you.
+That's how I'll show my love for you.
+		    
+		 
+	}
+	\addlyrics{
+		%verse 2
+		
+
+	
+	}
+	
+	
+	\new TabStaff {
+		\set TabStaff.stringTunings = #ukulele-tuning
+		%\transpose cis d{
+		\relative c'{
+			\mynotes
+			%\myNewNotes
+		}
+		% }
+	}
+
+>>
+%\midi{}
+
+
+}
+	
+
+