Go process livereload for development

Makefile

PID     = tmp/server.pid
APPNAME	= app
FSWATCH_PATTERNS = ./

server:
	@make restart
	@fswatch -o $(FSWATCH_PATTERNS) | xargs -n1 -I{} make restart || make kill
	@make kill
	
kill:
	@cat $(PID) 2>/dev/null | xargs -L1 kill || true
	@rm -f $(PID)

restart:
	@make kill
	@go build -o $(APPNAME)
	@echo ">>>>>>>>>>>>>>>>>>>>>>>>>> Restarted at $$(date)"
	@mkdir -p tmp
	@./$(APPNAME) -logtostderr -v=3 & echo $$! > $(PID)

.PHONY: server kill restart

See https://github.com/mattgreen/watchexec as a simpler solution.