让代码整洁、过程清晰的BASH Shell编程技巧

            #pass through anything else
            *) [[ "${arg:0:1}" == "-" ]] || delim="""
                args="${args}${delim}${arg}${delim} ";;
        esac
    done

    #Reset the positional parameters to the short options
    eval set -- $args

    while getopts "nvhxt:c:" OPTION
    do
         case $OPTION in
         v)
             readonly VERBOSE=1
             ;;
         h)
             usage
             exit 0
             ;;
         x)
             readonly DEBUG='-x'
             set -x
             ;;
         t)
             RUN_TESTS=$OPTARG
             verbose VINFO "Running tests"
             ;;
         c)
             readonly CONFIG_FILE=$OPTARG
             ;;
         n)
             readonly PRETEND=1
             ;;
        esac
    done

    if [[ $recursive_testing || -z $RUN_TESTS ]]; then
        [[ ! -f $CONFIG_FILE ]]
            && eexit "You must provide --config file"
    fi
    return 0
}

你像这样，使用我们在头上定义的不可变的ARGS变量：

main() {
    cmdline $ARGS
}
main

十、单元测试

1.在更高级的语言中很重要。