shell 创建带参数的命令方法

while [ "$1" != "" ]
do
  case $1 in
    -pn | --prjname )       shift
                            prj_name=$1 ;;
    -ge | --gitemail )      shift
                            git_email=$1 ;;
    -gn | --gitname )       shift
                            git_name=$1 ;;
    -h | --help )           usage
                            exit 1 ;;
     * )                    echo -e "\033[1;31m\"$1\" is not a vaild option\033[0m"
                            usage
                            exit ;;   
  esac
done