自动执行 PowerShell 响应以提示 [英] Automate PowerShell Response to prompt

问题描述

创建一个调用应用程序 cmdlet 的 PowerShell 脚本.当 cmdlet 运行时，它会提示响应并且脚本挂起.cmdlet 没有用于此的任何参数.有没有办法以编程方式响应?我试过 ECHO 但这不起作用.脚本挂起

Creating a PowerShell script that calls an apps cmdlet. When then cmdlet runs it prompts for a response and the scripts hangs. The cmdlet doesn't have any parameters for this. Is there any way to respond programmatically? I tried ECHO but that doesn't work. script hanging

推荐答案

获取通过主机请求输入的 PowerShell 脚本的唯一方法 - 通常是通过 Read-Host - 读取来自管道而不是键盘的输入用于将脚本作为外部PowerShell实例运行.

The only way to get PowerShell scripts that solicit input via the host - typically, via Read-Host - to read input from the pipeline instead of from the keyboard is to use to run the script as an external PowerShell instance.

一个简单的例子:

# Does NOT work: pipeline input is IGNORED and Read-Host "hangs", i.e.,
# it waits for interactive input.
'y' | & { Read-Host "Y/N?" }


# OK: By launching the command via a new PowerShell instance,
#     Read-Host reads from the pipeline (stdin).
#     To run a script file externally, use -file instead of -command.
'y' | powershell -noprofile -command 'Read-Host "Y/N?"'

注意:通过外部 PowerShell 实例运行脚本/命令是有代价的:

Note: Running the script / command via an external PowerShell instance comes at a cost:

• 就性能而言，创建新的 PowerShell 进程成本高昂.

• Creating a new PowerShell process is costly in terms of performance.

默认情况下，新实例的输出将是文本(字符串)，而不是对象.

Output from the new instance will be textual (strings) by default, not objects.

• 您可以通过将 -OutputFormat xml 传递给外部实例并通过 Import-CliXml 对结果进行后处理来近似通常的进程内体验代码>，但这有局限性.

• You can approximate the usual in-process experience by passing -OutputFormat xml to the external instance and post-processing the results via Import-CliXml, but that has limitations.

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