如何根据时间计数使bash变量在单数和复数结尾之间改变单词？

Question

我还不是一个好的bash脚本编写者。

在下面的示例脚本中，我试图通过步骤，检查自步骤开始以来经过的时间量，并使用正确的单数或复数结尾来描述已经过去的时间量。

如果经过的时间量减少到1秒，我希望脚本告诉我需要1秒“才能完成步骤，如果除了1秒之外还有其他任何东西，我希望它告诉我它花了x个“秒”

#!\bin\bash
STEP=0
STEPS=4
RUN=1

while [ $RUN -eq 1 ]
do
    if (( RUNTIME == 1 ))
    then
      SEC="second"
    else
      SEC="seconds"
    fi


    STEP=$(( STEP + 1 ))
    printf "\\nStep $STEP/$STEPS\\n"
    printf "Hi!\\n"
    TIME=$SECONDS
    RUNTIME=$(( TIME - START_TIME ))
    printf "That took $RUNTIME $SEC\\n\\n"

    STEP=$(( STEP + 1 ))
    printf "Step $STEP/$STEPS\\n"
    printf "Hi!\\n"
    sleep 1s
    TIME1=$SECONDS
    RUNTIME=$(( TIME1 - TIME ))
    printf "That took $RUNTIME $SEC\\n\\n"

    STEP=$(( STEP + 1 ))
    printf "Step $STEP/$STEPS\\n"
    printf "Hi!\\n"
    sleep 2s
    TIME2=$SECONDS
    RUNTIME=$(( TIME2 - TIME1 ))
    printf "That took $RUNTIME $SEC\\n\\n"

    STEP=$(( STEP + 1 ))
    printf "Step $STEP/$STEPS\\n"
    printf "Hi!\\n"
    sleep 3s
    TIME3=$SECONDS
    RUNTIME=$(( TIME3 - TIME2 ))
    printf "That took $RUNTIME $SEC\\n\\n"

    END_TIME=$SECONDS
    RUNTIME=$(( END_TIME - START_TIME ))
    printf "The script took $RUNTIME $SEC to complete.\\n\\n"

    RUN=0

done

Answer 1

大卫，如果你还没有发现这个问题，那就更像鸡蛋或鸡蛋了。这意味着您在循环开始时基于SEC的值设置RUNTIME，而不是在输出之前的RUNTIME的当前值。一个更好的方法来处理这个，而不是在循环的顶部计算SEC，只需编写一个小函数，根据"second"的值输出"seconds"或RUNTIME并将其合并到你的printf（如果你不在WSL不应该在格式字符串中包含双\\ - 尽管从你使用它，它看起来像你是）

你可以做一些简单的事情：

#!/bin/bash

STEP=0
STEPS=4
RUN=1

secorsecs () {              ## simple sec or secs function based on $RUNTIME
    local seconds="second"  ## your base output is "second"
    if (( RUNTIME != 1 ))   ## if RUNTIME != 1
    then
        seconds+="s"        ## append an "s" to the end
    fi
    printf "%s" "$seconds"  ## output result
}

while [ $RUN -eq 1 ]
do
    STEP=$(( STEP + 1 ))
    printf "\\nStep $STEP/$STEPS\\n"
    printf "Hi!\\n"
    TIME=$SECONDS
    RUNTIME=$(( TIME - START_TIME ))
    printf "That took $RUNTIME $(secorsecs)\\n\\n"

    STEP=$(( STEP + 1 ))
    printf "Step $STEP/$STEPS\\n"
    printf "Hi!\\n"
    sleep 1s
    TIME1=$SECONDS
    RUNTIME=$(( TIME1 - TIME ))
    printf "That took $RUNTIME $(secorsecs)\\n\\n"

    STEP=$(( STEP + 1 ))
    printf "Step $STEP/$STEPS\\n"
    printf "Hi!\\n"
    sleep 2s
    TIME2=$SECONDS
    RUNTIME=$(( TIME2 - TIME1 ))
    printf "That took $RUNTIME $(secorsecs)\\n\\n"

    STEP=$(( STEP + 1 ))
    printf "Step $STEP/$STEPS\\n"
    printf "Hi!\\n"
    sleep 3s
    TIME3=$SECONDS
    RUNTIME=$(( TIME3 - TIME2 ))
    printf "That took $RUNTIME $(secorsecs)\\n\\n"

    END_TIME=$SECONDS
    RUNTIME=$(( END_TIME - START_TIME ))
    printf "The script took $RUNTIME $(secorsecs) to complete.\\n\\n"

    RUN=0

done

示例使用/输出

$ bash seconds.sh

Step 1/4
Hi!
That took 0 seconds

Step 2/4
Hi!
That took 1 second

Step 3/4
Hi!
That took 2 seconds

Step 4/4
Hi!
That took 3 seconds

The script took 6 seconds to complete.

仔细看看，如果您有其他问题，请告诉我。