# script created by @Izybkr (https://github.com/microsoftfeedback/WinDbg-Feedback/issues/19#issuecomment-1513926394) with my minor updates to make it work with latest WinDbg releases):

param(
    $OutDir = ".",
    [ValidateSet("x64", "x86", "arm64")]
    $Arch = "x64"
)

if (!(Test-Path $OutDir)) {
    $null = mkdir $OutDir
}

$ErrorActionPreference = "Stop"

if ($PSVersionTable.PSVersion.Major -le 5) {
    [Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12

    # This is a workaround to get better performance on older versions of PowerShell
    $ProgressPreference = 'SilentlyContinue'
}

# Download the appinstaller to find the current uri for the msixbundle
Invoke-WebRequest https://aka.ms/windbg/download -OutFile $OutDir\windbg.appinstaller

# Download the msixbundle
$msixBundleUri = ([xml](Get-Content $OutDir\windbg.appinstaller)).AppInstaller.MainBundle.Uri

# Download the msixbundle (but name as zip for older versions of Expand-Archive
Invoke-WebRequest $msixBundleUri -OutFile $OutDir\windbg.zip

# Extract the 3 msix files (plus other files)
Expand-Archive -DestinationPath $OutDir\UnzippedBundle $OutDir\windbg.zip

# Expand the build you want - also renaming the msix to zip for Windows PowerShell
$fileName = switch ($Arch) {
    "x64" { "windbg_win-x64" }
    "x86" { "windbg_win-x86" }
    "arm64" { "windbg_win-arm64" }
}

# Rename msix (for older versions of Expand-Archive) and extract the debugger
Rename-Item "$OutDir\UnzippedBundle\$fileName.msix" "$fileName.zip"
Expand-Archive -DestinationPath "$OutDir\windbg" "$OutDir\UnzippedBundle\$fileName.zip"

Remove-Item -Recurse -Force "$OutDir\UnzippedBundle"
Remove-Item -Force "$OutDir\windbg.appinstaller"
Remove-Item -Force "$OutDir\windbg.zip"

# Now you can run:
& $OutDir\windbg\DbgX.Shell.exe