Remote Server Administration Tools 2.1809.0.20190205

$ErrorActionPreference = 'Stop'

$1809Build = 17763

$osInfo = Get-WmiObject Win32_OperatingSystem | Select-Object Version, ProductType, Caption, OperatingSystemSKU, BuildNumber

Write-host "Detected:  $($osInfo.Caption)" -ForegroundColor Cyan

$osInfo.Version = [version]$osInfo.Version
if ($osInfo.Version -lt [version]'6.0') {
   Throw 'The Remote System Administration Toolkit (RSAT) requires Windows Vista or later.'
}
elseif ($osInfo.ProductType -ne 1) {
   Write-Warning 'The Remote System Administration Toolkit (RSAT) is built into Windows Server, so no need for an actual install.'
   Return
}
# See here for determining the edition of Windows via SKU:
#   https://superuser.com/questions/1328506/windows-edition-on-non-english-systems
# The list below are the valid SKUs for Windows editions that can have RSAT
elseif ((1,4,6,16,27,28,48,49,70,72,84,103,121,122,125,126,129,130,133,161,162) -notcontains ($osInfo.OperatingSystemSKU)) {
   Throw 'The Remote System Administration Toolkit (RSAT) can only install on Professional, Enterprise, or Education editions of Windows.'
}

$web = New-Object Net.WebClient
if ($osInfo.Version.Major -eq 6) {
   switch ($osInfo.Version.Minor) {
      0 { # Vista
            If (Get-OSArchitectureWidth -eq 64) {
               Throw 'Vista x64 is not supported.'; return
            }
            $html = $web.DownloadString('https://www.microsoft.com/download/confirmation.aspx?id=21090') 
            $Checksum = '507c857b6a7cb15abaa36730b57d65487587ea62d7cf73f7b24542c1ef70038a' }
      1 { # Win7
            $html = $web.DownloadString('https://www.microsoft.com/download/confirmation.aspx?id=7887') 
            $Checksum = 'fcc36f0686f23bf57b0c719dfc86b06e8d2b501f93a08ed81704d15ab1726b41'
            $Checksum64 = '1d9f49878fff72d9954ec58cf10b72d8edc3d9126c10b1c4155b7912e2450f3c' }
      2 { # Win8
            $html = $web.DownloadString('https://www.microsoft.com/download/confirmation.aspx?id=28972') 
            $Checksum = '050aefe2568de7e9e28d75c6752a8287cbbb0f2a0f2be5dd0e0c75ba29aff941'
            $Checksum64 = '9799352c104d56a3bb7e5f931dadb4aa3361fce3d41be23699787a23347f207a' }
      3 { # Win8.1
            $html = $web.DownloadString('https://www.microsoft.com/download/confirmation.aspx?id=39296') 
            $Checksum = 'eb62cfabdc0c3231a1ba2d5310f4ff1daf6294b89b143cc10b255becb1da5b75'
            $Checksum64 = 'dea5540a59e018e04e088afb2aa326fb690d27a983fd3cbffefbfcfdde20a47d' }
   }
} elseif ($osInfo.Version.Major -eq 10) { # Windows 10
   $pp = Get-PackageParameters
   if ($osInfo.BuildNumber -lt $1809Build) {
      switch ($pp.Server) {
         '2016' { $WS = '2016'
                  $Checksum = '6d46ef85cb63cf5c949706b7890bc1bb56a8c30506700262fe5ef4999b7380f3'
                  $Checksum64 = '4aeb716f301783e56739f9b0a361e2aa4f1e1d6b947b76c1d61af70b0ff0b4c7' }
         '1709' { $WS = '1709'
                  $Checksum = 'b62f131993908e24f093c8d630b84d49a829d9f7922dab17aa2f42867b096c43'
                  $Checksum64 = '72b34e1bef5c790081ffda24e18a5eb3cbe26944baee604aae0deddd8bfe6ebc' }
         default { $WS = '1803'
                  $Checksum = '968c20e6492b89fe72fe1cf496b90b7106492258a02d1333a6aa810be7cf5b49'
                  $Checksum64 = '3908b653c8bc5567684ab2779ee110dc2c0d56d2a33a329fe5460ecce55aaebe' }
      }
      $html = $web.DownloadString('https://www.microsoft.com/download/confirmation.aspx?id=45520')
      Write-Host "Installing tools for managing Windows Server $WS." -ForegroundColor Cyan
   }
}

If (($osInfo.Version.Major -ne 10) -or ($osInfo.BuildNumber -lt $1809Build)) {
   $urls = select-string '"https[^"]*msu"' -input $html -AllMatches |
   ForEach-Object {$_.matches} | 
   ForEach-Object {$_.value.trim('"')} |
   Select-Object -unique |
   Where-Object {$_ -match "WS_?$WS"}

   $url        = $urls | where-Object {$_ -match 'x86' }
   $url64      = $urls | where-Object {$_ -match 'x64' }

   $packageArgs = @{
      PackageName   = $env:ChocolateyPackageName
      FileType      = 'msu'
      Url           = $url
      Url64bit      = $url64
      Checksum      = $Checksum
      Checksum64    = $Checksum64
      ChecksumType  = 'sha256'
      SilentArgs    = '/quiet /norestart'
      ValidExitCodes= @(0,3010,-2146233087,2359302)
   }
   Install-ChocolateyPackage @packageArgs

} else {
   # Based on https://gallery.technet.microsoft.com/Install-RSAT-for-Windows-75f5f92f
   $WSUSKey = 'HKLM:\SOFTWARE\Policies\Microsoft\Windows\WindowsUpdate\AU'
   if (Test-Path $WSUSKey) {
      $Save = (Get-ItemProperty -Path $WSUSKey -Name 'UseWUServer' -ErrorAction SilentlyContinue).UseWUServer
      Set-ItemProperty -Path $WSUSKey -Name 'UseWUServer' -Value 0
      Restart-Service wuauserv
   }

   $WhereArray = @()
   if ($pp.AD) {$WhereArray += '($_.Name -like "Rsat.ActiveDirectory*")'}
   if ($pp.GP) {$WhereArray += '($_.Name -like "Rsat.GroupPolicy*")'}
   if ($pp.SM) {$WhereArray += '($_.Name -like "Rsat.ServerManager*")'}
   if ($pp.CS) {$WhereArray += '($_.Name -like "Rsat.CertificateServices*")'}
   if ($pp.RD) {$WhereArray += '($_.Name -like "Rsat.RemoteDesktop*")'}
   if ($pp.FS) {$WhereArray += '($_.Name -like "Rsat.FileServices*")'}
   if ($pp.DNS) {$WhereArray += '($_.Name -like "Rsat.DNS*")'}
   if ($pp.DHCP) {$WhereArray += '($_.Name -like "Rsat.DHCP*")'}

   if ($WhereArray.count -eq 0) {
      $WhereArray += '$_.Name -like "Rsat*"'
   }
   $WhereString = '$_.State -eq "NotPresent" -AND (' + ($WhereArray -join ' -OR ') + ')'

   $Tools = Get-WindowsCapability -Online | Where-Object $([scriptblock]::Create($WhereString))
   foreach ($Item in $Tools) {
      try {
         Write-Host "`nAdding $($Item.Name) to Windows"
         $DISMobject = Add-WindowsCapability -Online -Name $Item.Name
         if ($DISMobject.RestartNeeded) {
            Write-Warning "A reboot is required."
         }
      }
      catch { Write-Warning -Message $_.Exception.Message; break }
   }
   Write-Host "`n"
   Write-Verbose "Windows Feature install log is at $($DISMobject.LogPath)"

   if (Test-Path $WSUSKey) {
      If ($Save -ne $null) {
         Set-ItemProperty -Path $WSUSKey -Name 'UseWUServer' -Value $Save
      } else {
         Remove-ItemProperty -Path $WSUSKey -Name 'UseWUServer' -Force
      }
      Restart-Service wuauserv
   }
}