Useful resources for pretty makefiles.

lib.mk

GREEN  := $(shell tput setaf 2 2>/dev/null)
YELLOW := $(shell tput setaf 3 2>/dev/null)
BOLD   := $(shell tput bold    2>/dev/null)
RESET  := $(shell tput sgr0    2>/dev/null)

define rich_echo
printf "${BOLD}$(1)${RESET}\t$(2)\n"
endef


TARGET_MAX_CHAR_NUM=20
## Show this message
help:
	@echo ''
	@echo 'Usage:'
	@echo '  ${YELLOW}make${RESET} ${GREEN}<target>${RESET}'
	@echo ''
	@echo 'Targets:'
	@awk '/^[a-zA-Z\-_0-9]+:/ { \
		helpMessage = match(lastLine, /^## (.*)/); \
		if (helpMessage) { \
			helpCommand = substr($$1, 0, index($$1, ":")-1); \
			helpMessage = substr(lastLine, RSTART + 3, RLENGTH); \
			printf "  ${YELLOW}%-$(TARGET_MAX_CHAR_NUM)s${RESET} ${GREEN}%s${RESET}\n", helpCommand, helpMessage; \
		} \
	} \
	{ lastLine = $$0 }' $(MAKEFILE_LIST)