通配/路径扩展结肠癌作为分隔符 [英] Globbing/pathname expansion with colon as separator

问题描述

我怎么可以转换包含水珠字符的字符串，如

 的/ var / lib中/宝石/ * /箱
 

成文件名的冒号分隔字符串（即PATH兼容）匹配模式？

即。 回声的/ var / lib中/宝石/ * /斌将返回

  /var/lib/gems/1.8/bin /var/lib/gems/1.9.1/bin
 

我想

  /var/lib/gems/1.8/bin:/var/lib/gems/1.9.1/bin
 

代替。

最明显的方法是简单地替换为空格字符：通过 TR ，但如果文件名本身包含空格字符不起作用

解决方案

其实，我想到了一个更好的解决方案：使用shell函数

 功能连接（）{
    当地IFS = $ 1
    转移
    回声$ *
}myString的= $（加入'：'在/ var / lib中/宝石/ * / bin中）
 

How can I convert a string containing glob characters such as

/var/lib/gems/*/bin

into a colon-separated string of filenames (i.e. PATH compatible) matching the pattern?

i.e. echo /var/lib/gems/*/bin will return

/var/lib/gems/1.8/bin /var/lib/gems/1.9.1/bin

I want

/var/lib/gems/1.8/bin:/var/lib/gems/1.9.1/bin 

instead.

The obvious approach is simply to replace the space character with ':' via tr, but that doesn't work if the filename itself contains the space character.

解决方案

Actually, I thought of a better solution: use a shell function.

function join() {
    local IFS=$1
    shift
    echo "$*"
}

mystring=$(join ':' /var/lib/gems/*/bin)

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