Powershell脚本使用read-host行调用其他powershell脚本

Question

我有多个powershell脚本，每个脚本都有一些read-host行，这样用户就可以在脚本中提供一些值，例如服务器的名称或某些情况下的true/false。

Ike创建一个powershell脚本，它将调用其他脚本，我的问题是:有没有一种方法可以让我的主脚本填充这些读取主机值？

或者，处理这个问题的最好方法是什么？我不想改变我现有的脚本。

Answer 1

不要试图重复发明轮子。Powershell已经能够提示缺少的参数，因此可以使用它来读取服务器名称等内容。它还能够在执行任何危险操作之前提示确认：

PS C:\> function Foo-Bar
>> {
>>     [CmdletBinding(SupportsShouldProcess=$true,
>>                   ConfirmImpact='High')]
>>     Param
>>     (
>>         # The target server
>>         [Parameter(Mandatory=$true,
>>                    ValueFromPipeline=$true,
>>                    ValueFromPipelineByPropertyName=$true,
>>                    ValueFromRemainingArguments=$false,
>>                    Position=0)]
>>         [ValidateNotNull()]
>>         [string[]]
>>         $ServerName
>>     )
>>
>>     Process
>>     {
>>         foreach ($srv in $ServerName) {
>>             if ($pscmdlet.ShouldProcess("$srv", "Foo-Bar the server"))
>>             {
>>                 Write-Output "$srv has been Foo'ed"
>>             }
>>         }
>>     }
>> }
>>
PS C:\> Foo-Bar

cmdlet Foo-Bar at command pipeline position 1
Supply values for the following parameters:
ServerName[0]: first
ServerName[1]: second
ServerName[2]: third
ServerName[3]:

Confirm
Are you sure you want to perform this action?
Performing the operation "Foo-Bar the server" on target "first".
[Y] Yes  [A] Yes to All  [N] No  [L] No to All  [S] Suspend  [?] Help (default is "Y"): y
first has been Foo'ed

Confirm
Are you sure you want to perform this action?
Performing the operation "Foo-Bar the server" on target "second".
[Y] Yes  [A] Yes to All  [N] No  [L] No to All  [S] Suspend  [?] Help (default is "Y"): a
second has been Foo'ed
third has been Foo'ed
PS C:\> Foo-Bar alpha,beta -confirm:$False
alpha has been Foo'ed
beta has been Foo'ed
PS C:\>

将代码放入cmdlet并使用ShouldProcess，您就可以完全控制何时提示用户继续，以及是否提示用户输入缺失值。

这也为你提供了免费的演练支持：

PS C:\> Foo-Bar alpha,beta -WhatIf
What if: Performing the operation "Foo-Bar the server" on target "alpha".
What if: Performing the operation "Foo-Bar the server" on target "beta".