Powershell 开关中断标签未被执行

Question

作为更大脚本的一部分，我已经实现了下面详述的 switch。目的是当脚本执行时，用户可以选择

1. 在屏幕上输入要迁移的用户，或者
2. 从文件导入。

如果选择了从文件导入选项——我想测试文件是否存在——如果没有，我想退出并返回开关标签 :choose。但是，当我选择从文件导入选项并提供一个不存在的路径时，脚本会继续并且不会中断或返回到标签。我哪里错了？

$chooseInputMethod = @"
This script migrates one or more user accounts between two trusted domains in a forest e.g. from domain1 to domain2 (or vice versa)

Select method to specify user(s) to migrate:

1. Enter name(s) on-screen (default)
2. Import name(s) from file

Enter selection number
"@

$choosePath = @"
Enter path to file..

Notes

  - Filename: 
    If file is located in script directory ($pwd) you can enter the filename without a path e.g. users.txt

  - No quotation marks: 
    DO NOT put any quotes around the path even if it contains spaces e.g. e:\temp\new folder\users.txt

Enter path or filename
"@

$enterUsernames = @"
Enter username(s) seperate each with a comma e.g. test1 or test1,test2,test3`n`nEnter name(s)
"@

cls
:choose switch (Read-Host $chooseInputMethod) {
    1 { cls; $usersFromScreen = Read-Host $enterUsernames }
    2 {
        cls;
        $usersFromFile = Read-Host $choosePath;
        if (-not (Test-Path $usersFromFile -PathType Leaf)) {
            break choose
        }
    }
    default { cls; $usersFromScreen = Read-Host $enterUsernames }
}

Write-Host "hello"

Answer 1

来自documentation for break :

In PowerShell, only loop keywords, such as Foreach, For, and While can have a label.

因此，尽管 switch 具有循环功能，但在这种情况下不被视为循环。

但是，在这种情况下，我不明白为什么没有标签的 break 是不够的。