引号中的波浪号扩展 [英] Tilde expansion in quotes

问题描述

我编写了一个脚本，其中必须在可能包含波浪号的用户定义目录中找到一些文件(因此，可能有 user_defined_directory='~/foo').构造看起来像

I write a script where must find some files in a user-defined directory which may contain tilde (thus, it's possible to have user_defined_directory='~/foo'). The construct looks like

found_files=$(find "$user_defined_directory" -type f … )

我使用引号来覆盖该路径中可能的空格，但根据手册页，波浪号扩展在引号中不起作用.我知道 : 运算符可能可以进行这种扩展，但我不知道如何在这里使用它.

I use quotes to cover possible spaces in that path, but tilde expansion does not work in quotes according to man page. I know about : operator that probably can do this expansion, but I can’t figure out how to use it here.

'user-defined-directory' 取自用户 $HOME 目录中的另一个配置文件.它不是作为参数传递给我的脚本，而是从我编写的脚本中的另一个配置中解析出来的.

The ‘user-defined-directory’ is being taken from another configuration file in user $HOME directory. It is not passing to my script as a parameter, it’s being parsed from that another config in the script I write.

推荐答案

您可以使用 "${user_defined_directory/#~/$HOME}" 替换开头的~"带有当前用户主目录的字符串.请注意，这不会处理 ~username/subdir 格式，只会处理普通的 ~.如果您需要处理更复杂的版本，则需要编写一个更复杂的转换器.

You can use "${user_defined_directory/#~/$HOME}" to replace a "~" at the beginning of the string with the current user's home directory. Note that this won't handle the ~username/subdir format, only a plain ~. If you need to handle the more complex versions, you'll need to write a much more complex converter.

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