getopts的不会连续两次打电话？ [英] getopts won't call twice in a row?

问题描述

由于某些原因，选择做工精细的第一个电话lib_progress_bar -c@-u_0 100 ，但在第二个电话并超越一切默认情况下，因为它看起来像 getopts的C：ü：D：p：S：％：M：标志是不正确的，第二次左右，或永远不会执行ATLEAST的情况下当我用设置-x

 ＃！/斌/庆典lib_progress_bar（）{
    局部电流= 0
    当地最大= 100
    本地completed_char =＃
    本地uncompleted_char =。
    当地小数= 1
    当地preFIX =[
    当地后缀=]
    当地percent_sign =％
    当地MAX_WIDTH = $（tput的COLS）    当地完整的保持减法宽度ATLEAST％的字符
    当地填充= 3    而getopts的C：ü：D：P：S：％：M：标志;做
        案$旗在
            C）completed_char =$ OPTARG;;
            U）uncompleted_char =$ OPTARG;;
            D）十进制=$ OPTARG;;
            P）preFIX =$ OPTARG;;
            S）后缀=$ OPTARG;;
            ％）percent_sign =$ OPTARG;;
            M）MAX_WIDTH =$ OPTARG;;
        ESAC
    DONE
    移位$（（OPTIND-1））
    电流= $ {1： -  $当前}
    最大= $ {2： -  $最大}
    如果（（十进制大于0））;然后
        （（填充=填充+小数+ 1））
    科幻
    让减法= $ {＃completed_char} + $ {＃preFIX} + $ {＃后缀} +填充+ $ {＃percent_sign}
    让宽度= MAX_WIDTH减法
    如果（（宽度小于5））;然后
        （（ATLEAST = 5 +减法））
        回声＆GT;和2（$ MAX_WIDTH）的MAX_WIDTH太小，至少要包含$ ATLEAST
        返回1
    科幻
    如果（（电流＆GT;最大））;然后
        回声＆GT;和2的电流值必须小于最高值。
        返回1
    科幻    百分比= $（AWK -vF =％$ {}填充$ {}十进制F-vC = $当前-vM = $最大'BEGIN {printf的（'F'，C / M * 100）}'）    （（字符=电流*宽/最大））    ＃sprintf的N个零，到命名为ARG于-v的VAR
    printf的-v完整的％0 *。* D'''$字符''
    printf的-v保持％* 0 * D'''$（（宽 - 字符））''    ＃与所需的字符替换零
    完整= $ {//完成0 /$ completed_char}
    依然= $ {//保持0 /$ uncompleted_char}    printf的％s％S％s％S％s％S \\ r'$preFIX$完整，$留，后缀$$％的$ percent_sign    如果（（电流＆GT; = MAX））;然后
        回声
    科幻
}
lib_progress_bar -c@-u_0 100
回声
lib_progress_bar -c@-u_25 100
回声
lib_progress_bar -c@-u_50 100
回声出口;
 

解决方案

只需添加：

 本地OPTIND
 

在您的函数的顶部

For some reason the options work fine the first call of lib_progress_bar -c "@" -u "_" 0 100, but on the second call and beyond everything is default because it seems like getopts c:u:d:p:s:%:m: flag isn't true the second time around, or atleast the case is never executed when I used set -x

#!/bin/bash



lib_progress_bar() {
    local current=0
    local max=100 
    local completed_char="#"    
    local uncompleted_char="."  
    local decimal=1 
    local prefix=" ["
    local suffix="]"
    local percent_sign="%"
    local max_width=$(tput cols)

    local complete remain subtraction width atleast percent chars
    local padding=3

    while getopts c:u:d:p:s:%:m: flag; do
        case "$flag" in
            c) completed_char="$OPTARG";;
            u) uncompleted_char="$OPTARG";;
            d) decimal="$OPTARG";;
            p) prefix="$OPTARG";;
            s) suffix="$OPTARG";;
            %) percent_sign="$OPTARG";;
            m) max_width="$OPTARG";;
        esac
    done
    shift $((OPTIND-1))


    current=${1:-$current} 
    max=${2:-$max} 


    if (( decimal > 0 )); then
        (( padding = padding + decimal + 1 ))
    fi


    let subtraction=${#completed_char}+${#prefix}+${#suffix}+padding+${#percent_sign}
    let width=max_width-subtraction


    if (( width < 5 )); then
        (( atleast = 5 + subtraction ))
        echo >&2 "the max_width of ($max_width) is too small, must be atleast $atleast" 
        return 1 
    fi


    if (( current > max ));then
        echo >&2 "current value must be smaller than max. value"
        return 1
    fi

    percent=$(awk -v "f=%${padding}.${decimal}f" -v "c=$current" -v "m=$max" 'BEGIN{printf('f', c / m * 100)}')

    (( chars = current * width / max))

    # sprintf n zeros into the var named as the arg to -v
    printf -v complete '%0*.*d' '' "$chars" ''
    printf -v remain '%0*.*d' '' "$((width - chars))" ''

    # replace the zeros with the desired char
    complete=${complete//0/"$completed_char"}
    remain=${remain//0/"$uncompleted_char"}

    printf '%s%s%s%s %s%s\r' "$prefix" "$complete" "$remain" "$suffix" "$percent" "$percent_sign"

    if (( current >= max )); then
        echo ""
    fi
}


lib_progress_bar -c "@" -u "_" 0 100 
echo
lib_progress_bar -c "@" -u "_" 25 100
echo
lib_progress_bar -c "@" -u "_" 50 100
echo

exit;

解决方案

Just add:

local OPTIND

at the top of your function.

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