Makefile for sheet music with LilyPond and LaTeX

Makefile

SHELL = /bin/sh
.SUFFIXES:
.SILENT:
.PHONY: timidity clean

# If you want more output, change this.
REDIRECT = > /dev/null
SHEETMUSICDIR = Songs
AOBSHEETMUSICDIR = AOB/Songs
DRAFTSHEETMUSICDIR = Drafts/Songs
MUSICSOURCEDIR = Source
AOBMUSICSOURCEDIR = AOB/Source
DRAFTMUSICSOURCEDIR = Drafts/Source
SHEETMUSIC = $(wildcard $(SHEETMUSICDIR)/*.lytex)
AOBSHEETMUSIC = $(wildcard $(AOBSHEETMUSICDIR)/*.lytex)
DRAFTSHEETMUSIC = $(wildcard $(DRAFTSHEETMUSICDIR)/*.lytex)
VPATH = $(SHEETMUSICDIR):$(MUSICSOURCEDIR):$(AOBSHEETMUSICDIR):$(AOBMUSICSOURCEDIR):$(DRAFTSHEETMUSICDIR):$(DRAFTMUSICSOURCEDIR)

PDFFILES = $(SHEETMUSIC:$(SHEETMUSICDIR)/%.lytex=%.pdf) $(AOBSHEETMUSIC:$(AOBSHEETMUSICDIR)/%.lytex=%.pdf) $(DRAFTSHEETMUSIC:$(DRAFTSHEETMUSICDIR)/%.lytex=%.pdf)
MIDIFILES = $(SHEETMUSIC:$(SHEETMUSICDIR)/%.lytex=%.midi) $(AOBSHEETMUSIC:$(AOBSHEETMUSICDIR)/%.lytex=%.midi) $(DRAFTSHEETMUSIC:$(DRAFTSHEETMUSICDIR)/%.lytex=%.midi)
FLACFILES = $(SHEETMUSIC:$(SHEETMUSICDIR)/%.lytex=%.flac) $(AOBSHEETMUSIC:$(AOBSHEETMUSICDIR)/%.lytex=%.flac) $(DRAFTSHEETMUSIC:$(DRAFTSHEETMUSICDIR)/%.lytex=%.flac)
OUTDIRS = $(SHEETMUSIC:$(SHEETMUSICDIR)/%.lytex=%/) $(AOBSHEETMUSIC:$(AOBSHEETMUSICDIR)/%.lytex=%/) $(DRAFTSHEETMUSIC:$(DRAFTSHEETMUSICDIR)/%.lytex=%/)

help:
	@echo 'Music makefile targets:'
	@echo ' '
	@echo '                  help  -  (this message)'
	@echo '                 music  -  compile all sheet music'
	@echo '                  midi  -  compile all sheet music as midi'
	@echo '                  flac  -  compile all sheet music as midi and flac'
	@echo '                 clean  -  remove generated files'
	@echo '                <song>  -  compile a single song'
	@echo '           <song>.midi  -  compile a single song as a midi'
	@echo '           <song>.flac  -  compile a single song as midi and flac'
	@echo ' '
	@echo '    AOB:    $(AOBSHEETMUSIC:$(AOBSHEETMUSICDIR)/%.lytex=%)'
	@echo '    Drafts: $(DRAFTSHEETMUSIC:$(DRAFTSHEETMUSICDIR)/%.lytex=%)'
	@echo '    Other:  $(SHEETMUSIC:$(SHEETMUSICDIR)/%.lytex=%)'

music: $(PDFFILES)
midi: $(MIDIFILES)
flac: $(FLACFILES)

timidity:
	@command -v timidity $(REDIRECT) 2>&1 || { \
		echo >&2 "Timidity is not installed. No flac file will be generated."; \
		exit 1; \
	}

%.flac: timidity %.midi
	timidity -OF $(word 2,$^) $(REDIRECT)

clean:
	@$(RM) -rf -- $(PDFFILES) $(MIDIFILES) $(FLACFILES) $(OUTDIRS)

%.tex: %.lytex $(MUSICSOURCEDIR)/*.ly $(AOBMUSICSOURCEDIR)/*.ly $(DRAFTMUSICSOURCEDIR)/*.ly
	lilypond-book --include=$(AOBMUSICSOURCEDIR) \
		--include=$(MUSICSOURCEDIR) \
		--include=$(DRAFTMUSICSOURCEDIR) \
		--latex-program=xelatex --output=$* --pdf $<

%.midi: %.tex
	find $* -name '*.midi' -exec cp \{\} $*.midi \;

%.pdf: %.lytex $(MUSICSOURCEDIR)/*.ly $(AOBMUSICSOURCEDIR)/*.ly $(DRAFTMUSICSOURCEDIR)/*.ly %.tex
	(cd $*; xelatex --interaction=nonstopmode --shell-escape --synctex=2 $*.tex)
	cp $*/$*.pdf .

%: %.pdf %.midi
	@echo ""