# file settings
BUILD_DIR 	:= build
DOCUMENT	:= essence_of_electronics.tex

# tex settings
TEX := lualatex \
		-interaction=nonstopmode \
		-halt-on-error \
		-output-directory=$(BUILD_DIR)

# automated stuff
_DOCUMENT := $(BUILD_DIR)/$(DOCUMENT)
_DOCUMENT_SRC := $(patsubst %.pdf,%.tex,$(DOCUMENT))

# recipes
.PHONY: build_dir
all: $(_DOCUMENT)

$(_DOCUMENT): $(_DOCUMENT_SRC) build_dir
	$(TEX) $<

build_dir:
	mkdir -p $(BUILD_DIR)/tex