Dead code :(

engine/block.py

@@ -358,4 +358,6 @@ class Block(object):
         else:
             skipstring = ""
 
-        return "\n  % Block: " + self.name + "\n    " + " ".join(item.lilypond(carryLilypondRanges) for item in self.data) + skipstring + "\n"
+        #Format:  Block name as comment, followed by a music expression { block data }
+        #The music expression doesn't hurt, but is useful for repeats
+        return "\n  % Block: " + self.name + "\n   { " + " ".join(item.lilypond(carryLilypondRanges) for item in self.data) + skipstring + " } \n"

engine/resources/lilypondTemplates/default.ly

@@ -70,9 +70,9 @@ correctFraction = #(lambda (grob)
     \remove "Note_heads_engraver"
     \consists "Completion_heads_engraver"
     \remove "Rest_engraver"
-    \consists "Completion_rest_engraver"    
+    \consists "Completion_rest_engraver"
     tieWaitForNote = ##t
-    
+
   }
   \context { \Staff
     \RemoveEmptyStaves
@@ -84,6 +84,8 @@ correctFraction = #(lambda (grob)
     %\consists "Default_bar_line_engraver"
 
     \override NoteHead  #'style = #'baroque  %breve and longa are squared.
+
+
   }
 }
 
@@ -94,6 +96,7 @@ tempoStaff = { %$$TEMPOSTAFF$$ }
 %$$VOICES$$
 
 \score{
+
 <<
 %How the definitions are arranged. Only staffgroups (staff prefix) and staffs, merged as voices.
 \accidentalStyle Score.neo-modern-voice
@@ -105,4 +108,3 @@ tempoStaff = { %$$TEMPOSTAFF$$ }
         %$$SUBTEXT$$
   %}
 }
-

engine/track.py

@@ -840,12 +840,60 @@ class Track(object):
 
         upbeatLy = "\\partial {} ".format(Duration.createByGuessing(self.upbeatInTicks).lilypond(carryLilypondRanges)) if self.upbeatInTicks else ""
 
+        #Find sequential content-linked blocks to convert them into lilypond voltas
+        last = set()
+        currentFirstBlockInARow = None
+        repeatCounter = 0
+        blockRepeatIndex = {} #block : int
+        blockRepeatTotal = {} #first block : int. This is not the same as len(set(block.linkedContentBlocksInScore())) because the latter is all links in total, while we only want the consecutive count. Only the first block of a row is in here.
+
+        #TODO: Contentlink -> Volta conversion is currently deactivated for multi-track. Too many lilypond problems
+        #As long as blockRepeatTotal exists and is empty export will treat each block as standalone, so everything works
+        #The commented-out code does not show the number of repeats, and more importantly, places the same repeats in all staffs, even if they do not exist there.
+        #This is not compatible with real-life music where one instrument plays the same part twice, but the second one has a different version the 2nd time.
+        #If we ever find a lilypond way to only set synchronized repeats this can get activated for more tracks.
+
+        codeActivated = len(self.parentData.tracks) == 1
+        codeActivated = False #TODO:   NO! Too fragile
+
+        for block in self.blocks: #in order
+            links = set(block.linkedContentBlocksInScore()) #it's a generator
+            if links:
+                if codeActivated and links == last:
+                    #This is not the first one in a row.
+                    repeatCounter += 1
+                    blockRepeatTotal[currentFirstBlockInARow] += 1
+                else:
+                    #This is the first one in a row. Reset.
+                    repeatCounter = 0
+                    currentFirstBlockInARow = block
+                    blockRepeatTotal[currentFirstBlockInARow] = 1
+                last = links
+            blockRepeatIndex[block] = repeatCounter #0 for standalone blocks. Each block one entry
+
+
+        #Another round through the blocks to generate data
+        lyData = ""
+        for block in self.blocks:
+            if block in blockRepeatTotal:
+                l = blockRepeatTotal[block]
+                if l > 1:
+                    assert blockRepeatIndex[block] == 0
+                    lyData += f"\n \\repeat volta {l}" +  block.lilypond(carryLilypondRanges)  #the lilypond block includes music expression { }
+
+                else:
+                    #No voltas. We could do \repeat volta 1 but that would be ugly lilypond.
+                    lyData += block.lilypond(carryLilypondRanges)
+            else:
+                # A linked block in a row.
+                # do NOT export any content linked block that is not the first in a row.
+                # they are included as voltas above.
+                pass
 
-        data = " ".join(block.lilypond(carryLilypondRanges) for block in self.blocks)
-        if data:
-            return timeSig + upbeatLy + data + "\n"
+        if lyData:
+            return timeSig + upbeatLy + lyData + "\n"
         else:
-            return ""
+            return "" #Empty track
 
 
     def serialize(self)->dict: