MiniLab

0.8.2

Private/InstallFeatureDism.ps1

                                function InstallFeatureDism {

    [CmdletBinding()]

    Param (

        [Parameter(Mandatory=$True)]

        [string]$Feature,   # Microsoft-Hyper-V, Containers, etc

        [Parameter(Mandatory=$False)]

        [switch]$AllowRestarts,

        [Parameter(Mandatory=$False)]

        [string]$ParentFunction

    )

    # Import the Dism Module

    if ($(Get-Module).Name -notcontains "Dism") {

        try {

            Import-Module Dism

        }

        catch {

            # Using full path to Dism Module Manifest because sometimes there are issues with just 'Import-Module Dism'

            $DismModuleManifestPaths = $(Get-Module -ListAvailable -Name Dism).Path

            foreach ($MMPath in $DismModuleManifestPaths) {

                try {

                    Import-Module $MMPath -ErrorAction Stop

                    break

                }

                catch {

                    Write-Verbose "Unable to import $MMPath..."

                }

            }

        }

    }

    if ($(Get-Module).Name -notcontains "Dism") {

        Write-Error "Problem importing the Dism PowerShell Module! Unable to proceed with Hyper-V install! Halting!"

        $global:FunctionResult = "1"

        return

    }

    # Check to see if the feature is already installed

    $FeatureCheck = Get-WindowsOptionalFeature -FeatureName $Feature -Online

    if ($FeatureCheck.State -ne "Enabled") {

        if ($ParentFunction) {

            Write-Warning "Please re-run $ParentFunction function AFTER this machine (i.e. $env:ComputerName) has restarted."

        }

        try {

            # Don't allow restart unless -AllowRestarts is explictly provided to this function

            Write-Host "Installing the Feature $Feature..."

            $FeatureInstallResult = Enable-WindowsOptionalFeature -Online -FeatureName $Feature -All -NoRestart -WarningAction SilentlyContinue

            # NOTE: $FeatureInstallResult contains properties [string]Path, [bool]Online, [string]WinPath,

            # [string]SysDrivePath, [bool]RestartNeeded, [string]$LogPath, [string]ScratchDirectory,

            # [string]LogLevel

        }

        catch {

            Write-Error $_

            $global:FunctionResult = "1"

            return

        }

    }

    else {

        Write-Warning "The Feature $Feature is already installed! No action taken."

    }

    if ($FeatureInstallResult.RestartNeeded) {

        if ($AllowRestarts) {

            Restart-Computer -Confirm:$false -Force

        }

        else {

            Write-Warning "You must restart in order to complete the Feature $Feature installation!"

        }

    }

    $FeatureInstallResult

}

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