MIXTAPE_DIR := mixtape
CLASSIC_DIR := classic
SRC_EXTENSION := .cho

MIXTAPE_FILES := $(wildcard $(MIXTAPE_DIR)/*$(SRC_EXTENSION))
CLASSIC_FILES := $(wildcard $(CLASSIC_DIR)/*$(SRC_EXTENSION))

MIXTAPE_PDF := $(patsubst $(MIXTAPE_DIR)/%$(SRC_EXTENSION), $(MIXTAPE_DIR)/%.pdf, $(MIXTAPE_FILES))
CLASSIC_PDF := $(patsubst $(CLASSIC_DIR)/%$(SRC_EXTENSION), $(CLASSIC_DIR)/%.pdf, $(CLASSIC_FILES))

MIXTAPE_HTML := $(patsubst $(MIXTAPE_DIR)/%$(SRC_EXTENSION), $(MIXTAPE_DIR)/%.html, $(MIXTAPE_FILES))
CLASSIC_HTML := $(patsubst $(CLASSIC_DIR)/%$(SRC_EXTENSION), $(CLASSIC_DIR)/%.html, $(CLASSIC_FILES))

MIXTAPE_SONGBOOK := mixtape.pdf
CLASSIC_SONGBOOK := classic.pdf

.DEFAULT_GOAL := all

$(MIXTAPE_DIR)/%.pdf: $(MIXTAPE_DIR)/%$(SRC_EXTENSION)
	chordpro -o $@ $<

$(MIXTAPE_DIR)/%.html: $(MIXTAPE_DIR)/%$(SRC_EXTENSION)
	chordpro -o $@ $<

$(CLASSIC_DIR)/%.pdf: $(CLASSIC_DIR)/%$(SRC_EXTENSION)
	chordpro -o $@ $<

$(CLASSIC_DIR)/%.html: $(CLASSIC_DIR)/%$(SRC_EXTENSION)
	chordpro -o $@ $<

all: $(MIXTAPE_PDF) $(MIXTAPE_HTML) $(CLASSIC_PDF) $(CLASSIC_HTML) $(MIXTAPE_SONGBOOK) $(CLASSIC_SONGBOOK)

$(MIXTAPE_SONGBOOK): $(MIXTAPE_PDF)
	gs -dBATCH -dNOPAUSE -q -sDEVICE=pdfwrite -sOutputFile=$@ $^

$(CLASSIC_SONGBOOK): $(CLASSIC_PDF)
	gs -dBATCH -dNOPAUSE -q -sDEVICE=pdfwrite -sOutputFile=$@ $^

.PHONY: html
html: $(MIXTAPE_HTML) $(CLASSIC_HTML)

.PHONY: pdf
pdf: $(MIXTAPE_PDF) $(CLASSIC_PDF) $(MIXTAPE_SONGBOOK) $(CLASSIC_SONGBOOK)

.PHONY: clean
clean:
	rm -f $(MIXTAPE_PDF) $(MIXTAPE_HTML) $(CLASSIC_PDF) $(CLASSIC_HTML) $(MIXTAPE_SONGBOOK) $(CLASSIC_SONGBOOK)