Makefile

# 當前目錄位置
PREFIX = $(shell pwd)
WATCH = $(PREFIX)/bin/watch

watch: $(WATCH)
	# 用 -s 來讓 make 安靜，不顯示 `make: Nothing to be done for `all'.` 這種訊息
	$(WATCH) -i 300ms make -s

# 安裝 watch 指令
$(WATCH):
	@-mkdir -p ./bin
	@cd /tmp \
	 && git clone https://github.com/tj/watch.git \
	 && cd watch \
	 && PREFIX=$(PREFIX) make install \
	 && cd .. \
	 && rm -rf watch