Occasional Utility: Everyday Powershell - Part 7 - Powershell to Upgrade Powershell 4

This is the next part in an ongoing series about Powershell. You may have heard about how awesome Powershell is but have struggled to find ways to make it useful in your day to day work. That's what this series is going to address. It'll provide scripts and knowledge to address practical everyday problems!

This is a script you can run that'll upgrade you to the newest version of the Windows Management Framework (version 4). What's so good about WMF4? Why Powershell 4 is in it!

#http://download.microsoft.com/download/3/D/6/3D61D262-8549-4769-A660-230B67E15B25/Windows8-RT-KB2799888-x64.msu

if ($PSVersionTable.psversion.Major -ge 4)
{
    write-host "Powershell 4 Installed already you don't need this"
    Exit-PSSession
}

$powershellpath = "C:\powershell"

function download-file
{
    param ([string]$path, [string]$local)
    $client = new-object system.net.WebClient
    $client.Headers.Add("user-agent", "PowerShell")
    $client.downloadfile($path, $local)
}

if (!(test-path $powershellpath))
{
    New-Item -ItemType directory -Path $powershellpath
}

if (($PSVersionTable.CLRVersion.Major) -lt 4)
{
    $DownloadUrl = "http://download.microsoft.com/download/B/A/4/BA4A7E71-2906-4B2D-A0E1-80CF16844F5F/dotNetFx45_Full_setup.exe"
    $FileName = $DownLoadUrl.Split('/')[-1]
    download-file $downloadurl "$powershellpath\$filename"
    ."$powershellpath\$filename"
}

#You may need to reboot after the .NET 4.5 install if so just run the script again.

if ([System.IntPtr]::Size -eq 4)
{
    $DownloadUrl = "http://download.microsoft.com/download/3/D/6/3D61D262-8549-4769-A660-230B67E15B25/Windows6.1-KB2819745-x86-MultiPkg.msu"
}
Else
{
    $DownloadUrl = "http://download.microsoft.com/download/3/D/6/3D61D262-8549-4769-A660-230B67E15B25/Windows6.1-KB2819745-x64-MultiPkg.msu"
}

$FileName = $DownLoadUrl.Split('/')[-1]
download-file $downloadurl "$powershellpath\$filename"

."$powershellpath\$filename"

You can use this script to save you typing ".net 4.5 framework" and "windows management framework 4" into Google. It's got the Microsoft download URLs hardcoded, and we use our tricky download-file function from weeks ago. Which is the great thing about getting into scripting, you really only have to solve a particular problem once! When the solution is in your script repository you can clone your own work!

The bulk of this script is just checking what .net and powershell versions are installed continuing or breaking depending on that. This should be familiar territory if you've been following along for the past 6 weeks.

We do check the Environment and check if we're running a 64bit version of windows then download the correct WMF file for your OS. That's a bit tricky.

We've also included the WMF for windows 8 so if you've got it installed you can copy and paste that into the $downloadurl (while you wear a potplant for a hat you mad windows 8 bugger you).

2 comments:

Chris.LemoyNovember 28, 2013 at 7:51 AM
Was a bit hesitant, but it worked a treat. had to change one setting in my
PS.

Set-ExecutionPolicy Unrestricted

Thanks Ben.
UnknownNovember 28, 2013 at 12:19 PM
Dear Mr Haslett,

I had your script stored on my hard drive and came across it recently. I had saved the script as UpdateToPS4.ps1 and was most dismayed to find that your script updates powershell rather than updating my PC to a PS4.

While I accept some responsibility for the naming of a script on my hard drive I feel you should accept the lion's share of responsibility and provide me with a full refund forthwith.

What do you say, let's settle this like men and not get the lawyers involved eh?

Wednesday, November 6, 2013

Everyday Powershell - Part 7 - Powershell to Upgrade Powershell 4

2 comments: