[New Feature]: Update WinGet to use UI.XAML 2.8

[denelon]

Description of the new feature/enhancement

Keeping dependencies current is generally a good idea.

It would also help resolve:

• [Update Request]: Windows Terminal winget-pkgs#108419

Proposed technical implementation details (optional)

No response

[A9G-Data-Droid]

Question: Why would a command line utility call anything from UI.Xaml?

Statement: A package manager needs to be able to run without any libraries or dependancies because that package manager is used to manage all libraries and dependencies. Consider making it self-contained.

[florelis]

Why would a command line utility call anything from UI.Xaml?

It doesn't. But winget is packaged along DesktopAppInstaller (the UI that shows up when you double-click on an .msix/.msixbundle), which has a dependency on WinUI 2.7.

[A9G-Data-Droid]

That seems like an odd choice for a package manager that might be running on a headless server.

These should be two completely different workflows:

1. Using DesktopAppInstaller to install
2. Using WinGet to install

When using workflow 2 I would expect all interaction to happen on the command line. Now on a system that has a desktop installed it would make sense for WinGet to be able to automatically install the DesktopAppInstaller when any package needs it, just like any other dependency.

[Trenly]

@denelon - This has been completed?

[huuub]

This problem is back... I installed xaml 2.8.6 but it needs 2.8???

[huuub]

I am using this as a workaround:
$progressPreference = 'silentlyContinue'
Write-Information "Downloading WinGet and its dependencies..."
Invoke-WebRequest -Uri https://aka.ms/getwinget -OutFile Microsoft.DesktopAppInstaller_8wekyb3d8bbwe.msixbundle
Invoke-WebRequest -Uri https://aka.ms/Microsoft.VCLibs.x64.14.00.Desktop.appx -OutFile Microsoft.VCLibs.x64.14.00.Desktop.appx
Invoke-WebRequest -Uri https://github.com/microsoft/microsoft-ui-xaml/releases/download/v2.8.6/Microsoft.UI.Xaml.2.8.x64.appx -OutFile Microsoft.UI.Xaml.2.8.x64.appx
Add-AppxPackage Microsoft.VCLibs.x64.14.00.Desktop.appx
Add-AppxPackage Microsoft.UI.Xaml.2.8.x64.appx
Add-AppxPackage Microsoft.DesktopAppInstaller_8wekyb3d8bbwe.msixbundle