bash包装纸将stderr颜色涂成红色 [英] bash wrapper to color stderr red

问题描述

Bash支持颜色，即\033[31m切换为红色，而\033[0m切换回无颜色.

Bash supports colors, i.e. \033[31m switches to red and \033[0m switches back to uncolored.

我想制作一个小型的bash包装器，将红色的stderr可靠地放出，即应该将\033[31m放在stderr的后面，然后将\033[0m放到stderr的后面.

I would like to make a small bash-wrapper that reliably puts out stderr in red, i.e. it should put \033[31m before and \033[0m after everything that comes from stderr.

我不确定这是否可能，因为当两个并行进程(甚至单个进程)同时向stdout和stderr写入时，就必须有一种方法来按字符逐个区分基础.

I'm not sure that this is even possible, because when two parallel processes (or even a single process) writes to both stdout and stderr there would have to be a way to distinguish the two by a character-by-character basis.

推荐答案

基于安德鲁顿的包装器

更改:

• 将stderr输出放回stderr
• 避免在行中使用echo -e处理内容

• Puts the stderr output back to stderr
• Avoid echo -e processing content in the lines

包装器

#!/bin/bash

"${@}" 2> >(
while read line; do
    echo -ne "\033[31m" 1>&2
    echo -n "${line}" 1>&2
    echo -e "\033[0m" 1>&2
done
)

问题: 输出线最终分组，而不是混合stdout/stderr

Issues: The output lines end up grouped, rather than mixed stdout/stderr

测试脚本:

#!/bin/bash

echo Hi
echo "\033[32mStuff"
echo message
echo error 1>&2
echo message
echo error 1>&2
echo message
echo error 1>&2

输出:

Hi
\033[32mStuff
message
message
message
error # <- shows up red
error # <- shows up red
error # <- shows up red

这篇关于bash包装纸将stderr颜色涂成红色的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！