如何更改PowerShell提示符以仅显示父目录和当前目录？ [英] How can I change the PowerShell prompt to show just the parent directory and current directory?

问题描述

我想缩短我的PowerShell提示符，使其仅显示父目录和当前目录。例如，如果密码是

  C：\Users\ndunn\OneDrive\Documents\Webucator\ ClassFiles\python-basics\Demos 
  

我希望提示符为：

  PS ..\python-basics\Demos> 
  

我可以将其设为 PS ..\Demos> 通过更改配置文件中的 prompt（）函数：

1. 通过在PowerShell中运行 $ profile 查找配置文件的位置。


2. 打开（或创建并打开）配置文件。 / li>
   
3. 更改（或添加）以下 prompt（）函数：

---

 功能提示
 {
 $ folder = $（（（get-item $ pwd）.Name） 
 PS ..\ $ folder> 
} 
  

---

我尝试使用 split（）和负索引，但无法使其正常工作。 / p>

此外，我只想在pwd至少降低两个级别的情况下执行此操作。如果pwd类似于C：\folder\folder，我想显示默认提示。

有什么想法吗？

解决方案

尝试以下功能，该功能应在Windows和类似Unix的平台（在PowerShell Core 中）均适用：

 函数global：prompt {
 $ dirSep = [IO.Path] :: DirectorySeparatorChar 
 $ pathComponents = $ PWD.Path.Split （$ dirSep）
 $ displayPath = if（$ pathComponents.Count -le 3）{
 $ PWD.Path 
} else {
'... {0} {1}' -f $ dirSep，（$ pathComponents [-2，-1] -join $ dirSep）
} 
" PS {0} $（'>'*（$ nestedPromptLevel + 1））" ; -f $ displayPath 
} 
  

请注意，我选择了单个字符…（水平省略号， U + 2026 ）表示路径的省略部分，因为 .. 可能与引用 parent 目录。

注意：非ASCII范围的…字符只有在封闭脚本文件（假定为您的 $ PROFILE 文件-使用BOM表另存为UTF-8 ^[1] 或UTF-16LE（ 。

如果由于某种原因对您不起作用，请使用三个不同的句点（'...'而不是'…'），但请注意，这将导致提示时间更长。

---

^{[1] BOM仅在 Windows PowerShell 中是必需的；相比之下，PowerShell Core 默认情况下采用UTF-8，因此不需要BOM。}

I would like to shorten my PowerShell prompt so that it just shows the parent directory and the current directory. For example, if the pwd is

C:\Users\ndunn\OneDrive\Documents\Webucator\ClassFiles\python-basics\Demos

I want the prompt to be:

PS ..\python-basics\Demos> 

I can get it to be just PS ..\Demos> by changing the prompt() function in the Profile file:

1. Find location of Profile file by running $profile in PowerShell.
2. Open (or create and open) Profile file.
3. Change (or add) the following prompt() function:

---

function prompt
{
  $folder = "$( ( get-item $pwd ).Name )"
  "PS ..\$folder> "
}

---

I tried using split() and negative indexing, but wasn't able to get it to work.

Also, I only want to do this if the pwd is at least two levels down. If the pwd is something like C:\folder\folder, I'd like to show the default prompt.

Any ideas?

解决方案

Try the following function, which should work on Windows and Unix-like platforms (in PowerShell Core) alike:

function global:prompt {
  $dirSep = [IO.Path]::DirectorySeparatorChar
  $pathComponents = $PWD.Path.Split($dirSep)
  $displayPath = if ($pathComponents.Count -le 3) {
    $PWD.Path
  } else {
    '…{0}{1}' -f $dirSep, ($pathComponents[-2,-1] -join $dirSep)
  }
  "PS {0}$('>' * ($nestedPromptLevel + 1)) " -f $displayPath
}

Note that I've chosen single character … (HORIZONTAL ELLIPSIS, U+2026) to represent the omitted part of the path, because .. could be confused with referring to the parent directory.

Note: The non-ASCII-range … character is only properly recognized if the enclosing script file - assumed to be your $PROFILE file - is either saved as UTF-8 with BOM^[1] or as UTF-16LE ("Unicode").

If, for some reason, that doesn't work for you, use three distinct periods ('...' instead of '…'), though note that that will result in a longer prompt.

---

^{[1] The BOM is only a necessity in Windows PowerShell; by contrast, PowerShell Core assumes UTF-8 by default, so no BOM is needed.}

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