Bash:并行化 FOR 循环执行等待来自 grep

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grep 进入 FOR 循环以对找到的行执行一些操作，在 FOR 循环内循环搜索要搜索的值，提供并行执行，但结果并不总是可预测的。我想强制执行根本不平行。
和代码示例:

for __loopVar in $(seq 1 32)
do 
    echo "do some stuff no so much time consuming"
    echo "calculate __someTextVar"

    for each_line in  $(grep -HiRF "$__someTextvar" --include \*.log $PATH_logFiles)
    do
        echo "some other stuff, with each line returned by grep"
    done
done

问题，(我假设)在等待 grep 返回值时，它从以下循环(“一些东西”)开始，混合了一些全局变量。
注意:通过多 channel 运行 Ubuntu 20.04.1 LTS。

Answer 1

您的循环是嵌套的，我相信它会给您带来一些困惑，因为我看不到外循环的目的。
如果您添加这些值的一些基本 echo ，我希望它变得更加清晰/明显:

for __loopVar in $(seq 1 3)

do
    echo "__loopVar value is ${__loopVar}"
    for each_line in  $(grep -HiRF "no" --include \sometext.txt $PATH_logFiles)

    do
    echo "__loopVar value2 is ${__loopVar}"
    echo "each_line value2 is ${each_line}"
    done

done

输出:

__loopVar value is 1
__loopVar value2 is 1
each_line value2 is sometext.txt:another
__loopVar value2 is 1
each_line value2 is b
__loopVar value2 is 1
each_line value2 is sometext.txt:and
__loopVar value2 is 1
each_line value2 is another
__loopVar value2 is 1
each_line value2 is d
__loopVar value is 2
__loopVar value2 is 2
each_line value2 is sometext.txt:another
__loopVar value2 is 2
each_line value2 is b
__loopVar value2 is 2
each_line value2 is sometext.txt:and
__loopVar value2 is 2
each_line value2 is another
__loopVar value2 is 2
each_line value2 is d
__loopVar value is 3
__loopVar value2 is 3
each_line value2 is sometext.txt:another
__loopVar value2 is 3
each_line value2 is b
__loopVar value2 is 3
each_line value2 is sometext.txt:and
__loopVar value2 is 3
each_line value2 is another
__loopVar value2 is 3
each_line value2 is d

我认为你想要做的更像是这样的:

IFS=$'\n'
for __loopVar in $(seq 1 3)
do
echo ${__loopVar}
    for each_line in  $(cat sometext.txt)
    do
        echo "some other stuff, with each line returned by grep ${each_line}"
    done
done

所以转义空格(让文件的猫得到整行)
然后循环 _loopVar 次。

$cat sometext.txt
Line a
another b
some other c
and another d
last value is e
$ bash 2.sh
1
some other stuff, with each line returned by grep Line a
some other stuff, with each line returned by grep another b
some other stuff, with each line returned by grep some other c
some other stuff, with each line returned by grep and another d
some other stuff, with each line returned by grep last value is e
2
some other stuff, with each line returned by grep Line a
some other stuff, with each line returned by grep another b
some other stuff, with each line returned by grep some other c
some other stuff, with each line returned by grep and another d
some other stuff, with each line returned by grep last value is e
3
some other stuff, with each line returned by grep Line a
some other stuff, with each line returned by grep another b
some other stuff, with each line returned by grep some other c
some other stuff, with each line returned by grep and another d
some other stuff, with each line returned by grep last value is e

由于您一开始就提供了一个不完整的脚本，因此此代码仍需要更改以匹配您的预期行为。 (例如，将 cat 命令更改为您的工作 grep)。