Installers requiring interaction in UI don't work via SSH

[TomBrien]

Brief description of your issue

I should start by saying that I am not entirely surprised by this but trying to install an application with a installer requiring interaction (such as WinSCP) over an SSH connection just results in the installation hanging at Installing....

Steps to reproduce

1. SSH into a machine with winget installed (note I am SSHing into an admin account and thus the prompt is elevated.
2. Try to install (for example) WinSCP with winget install winwcp

Expected behavior

I guess winget should detect the installer is hanging and kill it providing some useful feedback.

Actual behavior

Installation just hangs at Installing...

Cancelling the install with ctrl+c and running get-process -name winscp* shows two process running:

NPM(K)    PM(M)      WS(M)     CPU(s)      Id  SI ProcessName
 ------    -----      -----     ------      --  -- -----------
     10     4.67       8.38       0.11   22476   0 WinSCP.WinSCP.5.17.5
     14     6.86      12.94       0.08   94084   0 WinSCP.WinSCP.5.17.5.tmp

RDPing into the machine and trying to install the same way gives a file access error (presumably due to these processes).

Killing these processes allows the command to work when run locally via RDP and the installer window pops up asking to install for all users or not.

I haven't tried with a X11 server running to see if I can catch the GUI

Environment

[winget --info]
Windows Package Manager v0.1.41331 Preview
Copyright (c) Microsoft Corporation. All rights reserved.

Windows: Windows.Desktop v10.0.18363.836
Package: Microsoft.DesktopAppInstaller v1.0.41331.0

Any other software?

[falko]

@TomBrien how did you even manage to launch winget via ssh? Did you find a workaround for #513?