powershell PS_v5_install.ps1

Posted 2021-05-22

$Description = "Gets Powershell 5 onto your system and optionally installs all the latest DSC Resource Kit Modules"
$Changes = @"

  NOTE: After any restarts initiated by the script, you must kick off the script again.

  [1] Sets PowerShell Execution Policy to "RemoteSigned"
  [2] Installs .NET 4.5.1 if not present
  [3] Install WMF 4 preequisite (Win 7 / Server 2008 R2 ONLY) if not present [Restarts]
  [4] Updates to PSH version 5.0.10514.6 (Production Preview 8/31/2015) [Restarts]
  [4] Installs PSReadline module which ships preinstalled with Windows 10 WMF 5
  [6] Offers to install entire DSC resource kit (for testing).
"@

clear-host
Write-output "****************************************************"
Write-output "Quick Config by Darwin (CSI-Windows.com)..."
Write-output $Description
Write-output "Changes to be made:"
Write-output $Changes
Write-output "****************************************************"

Function Test-ProcHasAdmin {Return [bool](([System.Security.Principal.WindowsIdentity]::GetCurrent()).groups -match "S-1-5-32-544")}
If (!(Test-ProcHasAdmin))
  {Throw "You must be running as an administrator, please restart as administrator"}

Function Console-Prompt {
  Param( [String[]]$choiceList,[String]$Caption = "Please make a selection",[String]$Message = "Choices are presented below",[int]$default = 0 )
$choicedesc = New-Object System.Collections.ObjectModel.Collection[System.Management.Automation.Host.ChoiceDescription] 
$choiceList | foreach { 
$comps = $_ -split '=' 
$choicedesc.Add((New-Object "System.Management.Automation.Host.ChoiceDescription" -ArgumentList $comps[0],$comps[1]))} 
#$choicedesc.Add((New-Object "System.Management.Automation.Host.ChoiceDescription" -ArgumentList $_))} 
$Host.ui.PromptForChoice($caption, $message, $choicedesc, $default) 
}

Switch (Console-Prompt -Caption "Proceed?" -Message "Running this script will make the above changes, proceed?" -choice "&Yes=Yes", "&No=No" -default 1)
  {
  1 {
    Write-Warning "Installation was exited by user."
    Pause
    Exit
    }
  }

"Getting Started..." | out-default

Write-Warning "Re-run this script as many times as necessary.  On Windows 7 SP1 and Server 2008 R2 SP1, this will probably be three times."

Set-ExecutionPolicy RemoteSigned

$os = (Get-WmiObject "Win32_OperatingSystem")

If (!(Test-Path env:ChocolateyInstall))
  {
  "Installing Chocolatey Package Manager..." | out-default
  iex ((new-object net.webclient).DownloadString('https://chocolatey.org/install.ps1')) 
  $env:path = "$($env:ALLUSERSPROFILE)\chocolatey\bin;$($env:Path)"
  }

"Available versions of Dot Net" | out-default
If ((get-itemproperty "hklm:software\microsoft\net framework setup\ndp\v4\full" -ea silentlycontinue | Select -Expand Release -ea silentlycontinue) -ge 378675)
  {
  "The minimum Dot Net Version (4.5.1) or greater is installed." | out-default
  }
Else
  {
  "The minimum Dot Net Version (4.5.1) or greater is NOT installed, installing 4.5.1..." | out-default
  Choco Install -y dotnet4.5.1    
  }

If ([version]$os.version -eq [version]"6.1.7600")
  {
  throw  "You must apply SP1 to Windows 7 or Server 2008 R2, exiting..."
  }

If (([version]$os.version -ge [version]"6.1.7601") -AND ([version]$os.version -lt [version]"6.2"))
  {
  If ($PSVersionTable.PSVersion -lt [Version]'4.0')
    {
    Write-Warning " Windows 7 SP1 and Server 2008 R2 SP1 must have PowerShell 4 installed before installing version 5"  
    Write-Warning "Installing PowerShell version 4 and rebooting..."
    Write-Warning "Please re-run this script after the reboot."
    cinst -y PowerShell -version 4.0.20141001
    restart-computer
    }
  }

  If ($PSVersionTable.PSVersion -lt [Version]'5.0.10105')
  {
  Write-Output "Installing PowerShell 5 Chocolatey Package..."
  Choco Install PowerShell -version 5.0.10514-ProductionPreview -confirm
  restart-computer
  }
  Else
  {
  Write-Output "PowerShell 5 is installed."
  }

  If ([Version]$PSVersionTable.PSVersion -ge [Version]'5.0')
    {

     Get-PackageProvider -Name NuGet -ForceBootstrap | out-null
     Install-Module -Name PSReadline -Scope AllUsers -Force
     Write-Output "Installed PSReadline from PowerShellGallery.com to match Windows 10 PowerShell 5 shipped configuration."

  Switch (Console-Prompt -Caption "Install all the latest DSC Resources from PowerShellGallery.com?" -Message "Do you wish to Install the DSC Resource Kit?" -choice "&Yes=Yes", "&No=No" -default 0)
    {
	0 {

	"You are running PowerShell 5, Installing all the latest DSCResourcekit modules from PowerShellGallery.com" | Out-Default
	"Automatically installing and activating the Nuget provider." | Out-Default
    Get-PackageProvider -Name NuGet -ForceBootstrap | out-null
	$existingrescount = (Get-DSCResource).count
    $reskitmodulecount = (find-module | where tags -contains "DSCResourceKit").count 
    "Installing $reskitmodulecount modules, please be patient as this can take a while..."
	#Get all the latest DSCResourcekit Modules
    find-module | where tags -contains "DSCResourceKit" | install-module -force
	$newDSCcount = (Get-DSCResource).count - $existingrescount
	"Installed $reskitmodulecount modules, containing $newDSCcount DSC Resources, use `"Get-DSCResource`" to see what was installed." | Out-Default
	}
       } 
    }