Makefile

BUILD = build
MAKEFILE = Makefile
OUTPUT_FILENAME = book
METADATA = metadata.yml
CHAPTERS = docs/book.md docs/common-interview-questions.md docs/katas.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:	epub pdf

clean:
	rm -r $(BUILD)

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

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

$(BUILD)/epub/$(OUTPUT_FILENAME).epub:	$(MAKEFILE) $(METADATA) $(CHAPTERS) style-epub.css $(IMAGES) \
					$(COVER_IMAGE)
	mkdir -p $(BUILD)/epub
	pandoc $(ARGS) --epub-cover-image=$(COVER_IMAGE) -o $@ $(CHAPTERS)

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