BUILD = build
MAKEFILE = Makefile
OUTPUT_FILENAME = book
METADATA = metadata.yml
CHAPTERS = chapters/*.md
TOC = --toc --toc-depth=2
IMAGES_FOLDER = images
IMAGES = $(IMAGES_FOLDER)/*
COVER_IMAGE = $(IMAGES_FOLDER)/cover.png
LATEX_CLASS = report
MATH_FORMULAS = --webtex
CSS_FILE = style.css
CSS_ARG = --css=$(CSS_FILE)
METADATA_ARG = --metadata-file=$(METADATA)
ARGS = $(TOC) $(MATH_FORMULAS) $(CSS_ARG) $(METADATA_ARG)

all:	book

book:	html	pdf

clean:
	rm -r $(BUILD)

html:	$(BUILD)/html/$(OUTPUT_FILENAME).html

pdf:	$(BUILD)/pdf/$(OUTPUT_FILENAME).pdf

$(BUILD)/html/$(OUTPUT_FILENAME).html:	$(MAKEFILE)	$(METADATA)	$(CHAPTERS)	$(CSS_FILE)	$(IMAGES)
	mkdir -p $(BUILD)/html
	pandoc $(ARGS) --standalone --to=html5 -o $@ $(CHAPTERS)
	cp -R $(IMAGES_FOLDER)/ $(BUILD)/html/$(IMAGES_FOLDER)/
	cp $(CSS_FILE) $(BUILD)/html/$(CSS_FILE)

$(BUILD)/pdf/$(OUTPUT_FILENAME).pdf:	$(MAKEFILE)	$(METADATA)	$(CHAPTERS)	$(CSS_FILE)	$(IMAGES)
	mkdir -p $(BUILD)/pdf
	pandoc $(ARGS) -V documentclass=$(LATEX_CLASS) -o $@ $(CHAPTERS)