easy-going-rails/bin/may_kill_dev.sh

#!/bin/bash

PORT=3000

pid_rails=$(ss -tlnp | grep "$PORT" | grep -oP "pid=\K(\d+)" | head -n1)
if [[ -n $pid_rails ]]; then
	echo "============================================================================"	
	echo "Rails already runs on port $PORT, You've asked for debugger on the same port."
	echo "============================================================================"	
	echo -n "Do you to want to kill rails process in order to launch debugger: (y/N)?: "
	read -n1 answer
	case $(echo $answer | tr '[A-Z]' '[a-z]') in
	        y|yes) kill -15 $pid_rails ;;
	        *)     echo " means NO"; exit 1 ;;
	esac
else
	echo "port $PORT is free for debugger, go on..."
fi