SRC_DIR := $(wildcard content/*)
SRC_EXTENSION := .cho

SONG_CHO := $(foreach dir,$(SRC_DIR),$(wildcard $(dir)/*$(SRC_EXTENSION)))
SONG_PDF := $(patsubst %$(SRC_EXTENSION),%.pdf,$(SONG_CHO))
SONG_HTML := $(patsubst %$(SRC_EXTENSION),%.html,$(SONG_CHO))
SONGBOOK := songbook.pdf

SHELL := $(shell echo $$SHELL)

.DEFAULT_GOAL := all

%.pdf: %$(SRC_EXTENSION)
	$(SHELL) -c 'chordpro --config=chordpro.json -o $@ $<'

%.html: %$(SRC_EXTENSION)
	$(SHELL)  -c 'chordpro --config=chordpro.json -o $@ $<'

all: $(SONG_PDF) $(SONG_HTML) $(SONGBOOK)

$(SONGBOOK): $(SONG_PDF)
	gs -dBATCH -dNOPAUSE -q -sDEVICE=pdfwrite -sOutputFile=$@ $^

.PHONY: html
html: $(SONG_HTML)

.PHONY: pdf
pdf: $(SONG_PDF)

.PHONY: clean
clean:
	rm -f $(SONG_PDF) $(SONG_HTML) $(SONGBOOK)