如何编写if exist语句块以检查是否已使用名称数组安装了Powershell模块

Question

更新:每个retryW接受的解决方案的最终工作脚本。这是实现我的总体目标的最简单的方法。

##########################
### INSTALL PS MODULES ###
##########################
Function inmod { Clear-Host

$modulesArray = @(
  "Convert",
  "Get-UserProfile",
  "Get-WindowsVersion",
  "PoshInternals",
  "PSConsoleTheme",
  "PSSpeedTest",
  "UpdateOS",
  "WindowsPSModulePath",
  "WindowsConsoleFonts",
  "xFailOverCluster"
)

ForEach($mod in $modulesArray) {
    If(Get-Module -ListAvailable $mod) {
        Continue; CLS
    } Else {
        Write-Host "Installing '$mod'"
        Install-Module $mod -Force -ErrorAction 'SilentlyContinue'
    }
  }
}

#############################
### UN-INSTALL PS MODULES ###
#############################
Function unmod { Clear-Host

$modulesArray = @(
  "Convert",
  "Get-UserProfile",
  "Get-WindowsVersion",
  "PSConsoleTheme",
  "PSSpeedTest",
  "WindowsPSModulePath",
  "WindowsConsoleFonts",
  "xFailOverCluster"
)

ForEach($mod in $modulesArray) {
    If(Get-Module -ListAvailable $mod) {
        Continue; CLS
    } Else {
        Write-Host "Un-Installing '$mod'"
        Uninstall-Module $mod
    }
  }
}

#################################
### UN-INSTALL ALL PS MODULES ###
#################################
Function unmodall { Clear-Host

ForEach($mods in (Get-Module -ListAvailable *).Name | Get-Unique) {
   Write-Host "Un-Installing '$mod'"
   Uninstall-Module $mod
  }
}

#########################
### UPDATE PS MODULES ###
#########################
Function upmod { Clear-Host

$modulesArray = @(
  "Convert",
  "Get-UserProfile",
  "Get-WindowsVersion",
  "PoshInternals",
  "PSConsoleTheme",
  "PSSpeedTest",
  "UpdateOS",
  "WindowsPSModulePath",
  "WindowsConsoleFonts",
  "xFailOverCluster"
)

ForEach($mod in $modulesArray) {
    If(Get-Module -ListAvailable $mod) {
        Continue; CLS
    } Else {
        Write-Host "Updating '$mod'"
        Update-Module $mod -Force
    }
  }
}

旧更新:对Lee_Dailey的响应

使用他的一些观点/建议，我已经将我的脚本进行到了下面这一点。

然而，我认为我遇到了新的问题，尽管我这次找到了匹配的对象。

If ($_ -match $item)似乎运行得很好。

If ($_ -notmatch $item)似乎不起作用。

我想我知道为什么，但我不完全确定。它可能会匹配ForEach ($item in (Get-Module -ListAvailable *).Name | Get-Unique)中找到的每个匹配项，并以某种方式导致问题？？

感谢你到目前为止的帮助。它帮助我进步了很多！

Function imods {
Write-Host; CLS

$AddModulesArray = @(
"Convert",
"Get-UserProfile",
"Get-WindowsVersion",
"PoshInternals",
"PSConsoleTheme",
"PSSpeedTest",
"UpdateOS",
"WindowsPSModulePath",
"WindowsConsoleFonts",
"xFailOverCluster"
)

ForEach ($item in (Get-Module -ListAvailable *).Name | Get-Unique) {
$_ = $item
$AddModulesArray | ForEach-Object {
If ($_ -notmatch $item) {
  Write-Host
  Write-Host Installing $_
  Install-Module -Name $_
  Read-Host -Prompt "Press Enter to continue"
  }
Else {
If ($_ -match $item) {
  Write-Host
  Write-Host $_ Already Exists
  Read-Host -Prompt "Press Enter to continue"
    }
   }
 }
}
}

此外，我知道使用`分隔行并不是很好的做法，但我发现这样读起来更容易。

Answer 1

您可以极大地简化这一过程，只需循环遍历要安装的模块列表，而不是所有模块，即可加快速度。

function imods {
    # Clear screen
    Clear-Host

    # Modules we need
    $modulesArray = @(
        "Convert",
        "Get-UserProfile",
        "Get-WindowsVersion",
        "PoshInternals",
        "PSConsoleTheme",
        "PSSpeedTest",
        "UpdateOS",
        "WindowsPSModulePath",
        "WindowsConsoleFonts",
        "xFailOverCluster"
    )

    # Rather than looking through both arrays, just loop through the ones we care about
    foreach($mod in $modulesArray) {
        if(Get-Module -ListAvailable $mod) {
            # Module exists
            Write-Host "Module '$mod' is already installed"
        } else {
            # Module does not exist, install it
            Write-Host "Installing '$mod'"
            Install-Module $mod
        }
    }
}