Windows Terminal installation script for Windows Server 2022

wt22.ps1

param (
	[alias('update','install','apply')]
	[switch]$run, # action mode
	[switch]$force # skips edition limitation
)

If ($PSVersionTable.PSVersion.Major -ge 7) {
	Write-Error 'This script needs be run by version of PowerShell prior to 7.0'
}

# check Windows edition
$wininfo = Get-ItemProperty -Path 'HKLM:\SOFTWARE\Microsoft\Windows NT\CurrentVersion'
if ($wininfo.ProductName -notmatch 'Server 2022') {
	Write-Warning 'This script is primarily intendent for Windows Server 2022.'
	if (-not $force) {return}
}

$downloadDir     = $env:temp
$framworkPkgUrl  = 'https://aka.ms/Microsoft.VCLibs.x64.14.00.Desktop.appx'
$framworkPkg     = "$downloadDir\Microsoft.VCLibs.x64.14.00.Desktop.appx"
$xamlPkg         = "$downloadDir\microsoft.ui.xaml.2.7.3.zip"
$xamlUrl         = 'https://www.nuget.org/api/v2/package/Microsoft.UI.Xaml/2.7.3'
$msixbundle      = "$downloadDir\Microsoft.WindowsTerminal.msixbundle"
$releasesUri     = 'https://api.github.com/repos/microsoft/terminal/releases/latest'

$progressPreference = 'silentlyContinue'
$downloadUri = ((Invoke-RestMethod -Method GET -Uri $releasesUri).assets | Where-Object name -like "*.msixbundle").browser_download_url #| Select-Object -First 1
if (-not $downloadUri) {
	Write-Warning "Retrieve WT download url error occurred."
	return
}

# Get prerequisites status
$packages    = Get-AppxPackage
$uixaml      = $packages.Where{$_.name -match 'Microsoft\.UI\.Xaml\.2\.7'}
$vclibstatus = $packages.Where{$_.name -match 'Microsoft\.VCLibs\.140\.00\.UWPDesktop'}
$wtver       = $packages.Where{$_.name -match 'Windowsterminal'}.version
$storever    = if ($downloadUri -match '/v([\d.]+)/') {$matches[1]}

if ($run) {
	# Start installation/update
	if ($wtver) {
		if ([version]$storever -le [version]$wtver) {
			Write-Host 'No update is required.'
			return
		}
	}

	Write-Host 'Downloading packages...'
	#Start-BitsTransfer -Source $framworkPkgUrl -Destination $framworkPkg
	#Start-BitsTransfer -Source $downloadUri -Destination $msixbundle
	if (-not $vclibstatus) {
		Write-Host '  VCLibs package'
		Invoke-WebRequest -Uri $framworkPkgUrl -OutFile $framworkPkg
	}
	if (-not $uixaml) {
		Write-Host '  Xaml package'
		Invoke-WebRequest -Uri $xamlUrl -OutFile $xamlPkg
	}
	Write-Host '  WT package'
	Invoke-WebRequest -Uri $downloadUri -OutFile $msixbundle

	Write-Host 'Installing packages...'
	if (-not $uixaml) {
		Write-Host '  Xaml package'
		Expand-Archive $xamlpkg -DestinationPath "$downloadDir\xamlpkg" -Force #-ErrorAction Stop
		Add-AppxPackage -Path "$downloadDir\xamlpkg\tools\AppX\x64\Release\Microsoft.UI.Xaml.2.7.appx"
	}

	if (-not $vclibstatus) {
		Write-Host '  VCLibs package'
		Add-AppxPackage -Path $framworkPkg
	}
	$vclibstatus = (Get-AppxPackage).Where{$_.name -match 'Microsoft\.VCLibs\.140\.00\.UWPDesktop'}
	if ($vclibstatus) {
		Write-Host '  WT package'
		Add-AppxPackage -Path $msixbundle
	} else {
		Write-Warning 'Could not install Microsoft.VCLibs.x64.14.00.'
	}

	# Cleanup
	Remove-Item $framworkPkg -Force -ErrorAction 0
	Remove-Item $msixbundle -Force -ErrorAction 0
	Remove-Item "$downloadDir\xamlpkg" -Force -Recurse -ErrorAction 0
	Write-Host 'Done.'
} 
else { # view mode
	$installed = 'Installed (required)'
	$notinstalled = 'Not installed (required)'
	[pscustomobject]@{
		InstalledVersion = if ($wtver) {$wtver} else {'Not installed'}
		LatestVersion    = $storever
		WTDownloadUri    = $downloadUri
		VCLibs           = if ($vclibstatus) {$installed} else {$notinstalled}
		UIXamlPackage    = if ($uixaml) {$installed} else {$notinstalled}
	}
}