Move internal functions into separate file for deprecation

lib/embellishments.ily

@@ -42,10 +42,10 @@ dragddr = \drummode { \drumgrace { g16[\dr g] } } 	% Drag right with start repea
 draggdr = \drummode { \drumgrace { d16[\dr d] } } 	% Drag left  with start repeat
 
 % Open Drags
-odragd =   \drummode { \drumgrace { << { g16[ g] } { s16 s32^\markup { \musicglyph #"scripts.open" } } >> } }		% Open Drag right
-odragg =   \drummode { \drumgrace { << { d16[ d] } { s16 s32^\markup { \musicglyph #"scripts.open" } } >> }	}		% Open Drag left
-odragddr = \drummode { \drumgrace { << { d16[\dr d] } { s16 s32^\markup { \musicglyph #"scripts.open" } } >> } }	% Open Drag right with start repeat
-odraggdr = \drummode { \drumgrace { << { g16[\dr g] } { s16 s32^\markup { \musicglyph #"scripts.open" } } >> } }	% Open Drag left  with start repeat
+odragd =   \drummode { \drumgrace { << { g16[ g] } { s16 s32^\markup { \musicglyph #"scripts.open" } } >> } }          % Open Drag right
+odragg =   \drummode { \drumgrace { << { d16[ d] } { s16 s32^\markup { \musicglyph #"scripts.open" } } >> }    }               % Open Drag left
+odragddr = \drummode { \drumgrace { << { d16[\dr d] } { s16 s32^\markup { \musicglyph #"scripts.open" } } >> } }       % Open Drag right with start repeat
+odraggdr = \drummode { \drumgrace { << { g16[\dr g] } { s16 s32^\markup { \musicglyph #"scripts.open" } } >> } }       % Open Drag left  with start repeat
 
 % Ruff
 ruffg =   \drummode { \drumgrace { d16[ g d] } }	% Ruff right
@@ -63,18 +63,12 @@ sruffddr = \drummode { \drumgrace { d16[\dr g g] } }	% Swiss Ruff left  with sta
 %%  Embellishment functions, automatic left or right    %%
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 
-get-first-note = #(define-music-function (music) (ly:music?)
-	"Get the first note-event in @var{music}"
-	(let ((note (car (extract-typed-music music 'note-event))))
-	  note
-	  )
-)
 
 #(define (autohandFunc left right)
 	"Return a music function that prepends @var{left} if the first next note-event is of type 'left-hand,
 else it will prepend @var{right}"
 	(define-music-function (parser location music) (ly:music? )
-		(let ((note (get-first-note music)))
+		(let ((note (_get-first-note music)))
 			#{
 				#(if (string=? (symbol->string (ly:music-property note 'drum-type)) "left-hand")
 					#{ $left #}
@@ -98,6 +92,7 @@ optflamdr = #(autohandFunc optflamgdr optflamddr )
 % Drag
 drag = #(autohandFunc dragg dragd )
 dragdr = #(autohandFunc draggdr dragddr )
+
 % Open Drag
 odrag = #(autohandFunc odragg odragd )
 odragdr = #(autohandFunc odraggdr odragddr )

lib/flourishing.ily

@@ -338,9 +338,9 @@ flourish = #(define-music-function (parser location notes) (ly:music?)
 scoop = #(define-music-function (music) (ly:music?) 
 	#{
 		<>^"scoop"\startGroup
-		#(allbutlastnote music)
+		#(_allbutlastnote music)
 		<>\stopGroup
-		#(lastnote music)
+		#(_lastnote music)
 	#})
 %---------------------------------------------------%
 % music function definitions

lib/internal_functions.ily

@@ -0,0 +1,27 @@
+% ================================================= %
+%     Internal Functions                            %
+%     as used by other files in this library        %
+% ================================================= %
+% Part of lilydrum
+
+#(define ( _get-first-note mus)
+	"Get the first note-event in @var{music}"
+	(let ((note (car (extract-typed-music mus 'note-event))))
+	  note
+	  )
+)
+
+#(define (_allbutlastnote mus)
+	"Reverse the elements, Pop of (cdr) the first element, Reverse again, put it in a SequentialMusic"
+	(let ((elts (ly:music-property mus 'elements)))
+		(make-music 'SequentialMusic 'elements (reverse (cdr (reverse elts))))
+	)
+)
+
+#(define (_lastnote mus)
+	"Get the last element, make it a list, put it in a SequentialMusic"
+	(let ((elts (ly:music-property mus 'elements)))
+		(make-music 'SequentialMusic 'elements (list (last elts)))
+	)
+)
+

lib/musical_functions.ily

@@ -91,18 +91,6 @@ odr = #(define-event-function (parser location) () #{ -\tag #'tutti \startGroup
 ofr = #(define-event-function (parser location) () #{ -\tag #'tutti \stopGroup #})
 rn = #(define-event-function (parser location) () #{ -\tag #'tutti ^\markup \path #0.1 #'((moveto 0 0)(rlineto 0 1)(rlineto 4 0)(rlineto 0 -1)) #})
 
-#(define (allbutlastnote mus)
-   "Reverse the elements, Pop of (cdr) the first element, Reverse again, put it in a SequentialMusic"
-	(let ((elts (ly:music-property mus 'elements)))
-		(make-music 'SequentialMusic 'elements (reverse (cdr (reverse elts))))
-	)
-)
-#(define (lastnote mus)
-   "Get the last element, make it a list, put it in a SequentialMusic"
-	(let ((elts (ly:music-property mus 'elements)))
-		(make-music 'SequentialMusic 'elements (list (last elts)))
-	)
-)
 tutti =
 #(define-music-function (myMusic) (ly:music?)
 	(define (grace-music-filter event)

lilydrum.ly

@@ -26,6 +26,8 @@
 
 #(ly:set-option 'relative-includes #t)
 
+\include "lib/internal_functions.ily"
+
 \include "lib/layout_tweaks.ily"
 \include "lib/musical_functions.ily"
 \include "lib/embellishments.ily"