Makefile

#!/bin/bash -eu

.DEFAULT_GOAL := help
.PHONY: help

STR = foo
$(eval TS := $(shell date +%Y%m%d%H%M%S%N))

hoge: ## [hoge] make hoge STR=bar
	@echo "STR: ${STR}"
	@echo ${TS}
	@sleep 1
	@echo ${TS}
	@sleep 1
	@echo ${TS}

help:
	@grep -E '^[a-zA-Z_-]+:.*?## .*$$' $(MAKEFILE_LIST) | awk 'BEGIN {FS = ":.*?## "}; {printf "\033[36m%-30s\033[0m %s\n", $$1, $$2}'