Question

词汇表：

主持人：PowershellHost会话
互动：[Environment]::UserInteractive -eq $True

情景：

创建一个powershell模块，该模块只会在出现故障情况下中止并且没有错误。在这种情况下，某些命令/模块只能在完整的交互式主机（如ISE和控制台）中正常工作，但不能在虚假的交互式主机（如NuGet包管理器控制台）中正常工作

解决方案失败：

# Add value to Powershell manifest(psd1) 
# Issue: Only supports a string for the `PowerShellHostName` property. How to specify both `ConsoleHost` and `Windows PowerShell ISE Host`? Unknown if this property supports regex, and even if it does, will the behavior change since it's not documented?
@{
    ....
    # Name of the Windows PowerShell host required by this module
    # PowerShellHostName = ''
    ....
}

解决方案失败：

# Check for interactive shell
# Issue: UserInteractive is still set in embedded shells like NuGet package manager
# console. Commands that expect user input directly often hang.
if([Environment]::UserInteractive) {
    # Do stuff, dotsource, etc
}

解决方案失败：

# Issue: returning still leaves module loaded, and it appears in Get-Module list
# Even if value is supplied for return, powershell's return statement is 'special'
# and the value is ignored
if($Host.Name -inotmatch '(ConsoleHost|Windows PowerShell ISE Host)') {
    Write-Warning "Host [$($Host.Name)] not supported, aborting"
    return 
}

解决方案失败：

# Issue: Module isn't loaded, so it can't be unloaded
if( $Host.Name -inotmatch '(ConsoleHost|Windows PowerShell ISE Host)' ) {
    Remove-Module ThisModuleName
}

解决方案失败：

# Issue: Powershell module error output is just passthrough, import-module 
# still reports success, even though $Error is has more stuff than before
if( $Host.Name -inotmatch '(ConsoleHost|Windows PowerShell ISE Host)' ) {
    Write-Error "Unsupported Host:" $Host.Name
}

烦人的解决方案：

# Issue: Leaves two errors on the stack, one for the throw, one for the module not 
# loading successfully
if($Host.Name -inotmatch '(ConsoleHost|Windows PowerShell ISE Host)') {
    throw "Host [$($Host.Name)] not supported, aborting"
}

不是解决方案：

Force user to wrap the import every time.

可疑解决方案：

将模块拆分为嵌套子模块，一个用于“公共”，另一个用于每个支持的主机。为每个使用子文件夹，并为每个子文件复制psd1。看起来它最终会成为可维护性的噩梦，特别是在嵌套依赖项方面。

UberModule
    /ModuleCommon
        /ModuleCommon.(psd1|psm1)
    /ConsoleHostSpecific
        /ConsoleHostSpecific.(psd1|psm1)
    /IseHostSpecific
        /IseHostSpecific.(psd1|psm1)
    /etc...

有更好的方法可以做到这一点，还是超级模块拆分是唯一的方法？

Answer 1

查看#requires关键字，它可能会提供您尚未尝试的一些选项。我不知道NuGet Package Manager Console是否具有唯一的ShellId。

#Requires –ShellId Microsoft.PowerShell

http://technet.microsoft.com/en-us/library/hh847765.aspx

Powershell模块在不支持的主机上中止加载

1 个答案: