Install-WMF4.ps1

<#	
	.NOTES
	===========================================================================
	 Created with: 	SAPIEN Technologies, Inc., PowerShell Studio 2015 v4.2.89
	 Created on:   	7/30/2015 12:48 PM
	 Created by:   	Colin Squier <hexalon@gmail.com
	 Filename:     	Install-WMF4.ps1
	===========================================================================
	.DESCRIPTION
		Automates installation of PowerShell 4.
#>

<#
	.SYNOPSIS
		Returns the path of the executing script's directory.
	
	.DESCRIPTION
		Sapien's implementation of the variable $HostInvocation
		causes a conflict the with the system's variable.
	
	.EXAMPLE
		PS C:\> Get-ScriptDirectory
	
	.NOTES
		Work around for handling Sapien's custom host environment.
#>
function Get-ScriptDirectory
{
	if ($HostInvocation -ne $null)
	{
		Split-Path $HostInvocation.MyCommand.path
	}
	else
	{
		#$Invocation = (Get-Variable MyInvocation -Scope 1).Value
		#Split-Path $Invocation.MyInvocation.path
		Split-Path $script:MyInvocation.MyCommand.Path
	}
}

If (-NOT ([Security.Principal.WindowsPrincipal] [Security.Principal.WindowsIdentity]::GetCurrent()).IsInRole(`
[Security.Principal.WindowsBuiltInRole] "Administrator"))
{
	Write-Warning "You do not have Administrator rights to run this script!`nPlease re-run this script as an Administrator!"
	Break
}

$RequiredOSVersion = "6.1.7601"
$OS = (Get-WmiObject -Class Win32_OperatingSystem)
$scriptDirectory = Get-ScriptDirectory
$Source = (Split-Path -Path $scriptDirectory -Parent)
$PackagePath = (Join-Path -Path $Source -ChildPath "ComputerSetup\WMF4")
$File32 = "Windows6.1-KB2819745-x86-MultiPkg.msu"
$File64 = "Windows6.1-KB2819745-x64-MultiPkg.msu"
$Product = "Windows Management Framework 4"

$FullPath32 = Join-Path -Path $PackagePath -ChildPath $File32
$FullPath64 = Join-Path -Path $PackagePath -ChildPath $File64

$Version = [Environment]::Version
$Version = $Version.Major

If ($Version -ge 4)
{
	Write-Host "$Product or later already installed." -ForegroundColor Green
	break
}

If ([version]$OS.Version -eq $RequiredOSVersion)
{	
	#$HotFix = (Get-HotFix | Where-Object { $_.HotfixID -eq 'KB2506143' -or $_.HotfixID -eq 'KB2819745' })
	$HotFix = (Get-HotFix | Where-Object { $_.HotfixID -eq 'KB2819745' })
	
	if (!($HotFix -eq $null))
	{
		Write-Host "$Product or later already installed." -ForegroundColor Green
	}
	
	If ($($OS.OSArchitecture) -eq '32-bit')
	{
		If ($HotFix -eq $null)
		{
			Write-Host "Installing $Product"
			$UpdateFile = Start-Process -FilePath "wusa.exe" -ArgumentList "`"$FullPath32`" /quiet /norestart" -Wait -Passthru
			$ExitCode = $UpdateFile.ExitCode
			Write-Host "$Product installer exit code: $ExitCode"
			If ($ExitCode -eq 0)
			{
				Write-Host "Installation completed successfully." -ForegroundColor Green
			}
			ElseIf ($ExitCode -eq 1602)
			{
				Write-Host "The user canceled installation." -ForegroundColor White
			}
			ElseIf ($ExitCode -eq 1603)
			{
				Write-Host "A fatal error occurred during installation." -ForegroundColor Red
			}
			ElseIf ($ExitCode -eq 1641)
			{
				Write-Host "A restart is required to complete the installation. This message indicates success." -ForegroundColor Yellow
			}
			ElseIf ($ExitCode -eq 3010)
			{
				Write-Host "A restart is required to complete the installation. This message indicates success." -ForegroundColor Yellow
			}
			ElseIf ($ExitCode -eq 5100)
			{
				Write-Host "The user's computer does not meet system requirements." -ForegroundColor Red
			}
		}
	}
	Else
	{
		If ($HotFix -eq $null)
		{
			Write-Host "Installing $Product"
			$UpdateFile = Start-Process -FilePath "wusa.exe" -ArgumentList "`"$FullPath64`" /quiet /norestart" -Wait -Passthru
			$ExitCode = $UpdateFile.ExitCode
			Write-Host "$Product installer exit code: $ExitCode"
			If ($ExitCode -eq 0)
			{
				Write-Host "Installation completed successfully." -ForegroundColor Green
			}
			ElseIf ($ExitCode -eq 1602)
			{
				Write-Host "The user canceled installation." -ForegroundColor White
			}
			ElseIf ($ExitCode -eq 1603)
			{
				Write-Host "A fatal error occurred during installation." -ForegroundColor Red
			}
			ElseIf ($ExitCode -eq 1641)
			{
				Write-Host "A restart is required to complete the installation. This message indicates success." -ForegroundColor Yellow
			}
			ElseIf ($ExitCode -eq 3010)
			{
				Write-Host "A restart is required to complete the installation. This message indicates success." -ForegroundColor Yellow
			}
			ElseIf ($ExitCode -eq 5100)
			{
				Write-Host "The user's computer does not meet system requirements." -ForegroundColor Red
			}
		}
	}
}
Else
{
	Write-Host "The user's computer does not meet system requirements." -ForegroundColor Red
}