uno-check is not running on Ubuntu MATE with VSC

[AfB102]

I am attempting to build an application for Ubuntu MATE running on an ASUS K50i laptop which implements a dektop window GUI communicating with a serial COM() port. I have installed VSC and used it's plugin tool to install dotnet8, C++, C# and presumably uno.

Refer to the following list for applications presently installed:

Entering "dotnet --info" into a terminal shows this (some items omitted for brevity)-

.NET SDK:
Version: 8.0.405

Runtime environment:
OS Name: ubuntu
OS Version: 20.04
RID: linux-x64
Base Path: /snap/dotnet-sdk/255/sdk/8.0.405/

.net workloads installed:
Configured to use loose manifests when installing new manidests.
There are no workloads to display

.NET SDKs installed:
8.0.405 [/snap/dotnet-sdk/255/sdk]

.NET runtimes installed:
Microsoft-AspNetCore.App 8.0.12 [/snap/dotnet-sdk/255/sdk/shared/Microsoft.AspNetCore.app]
Microsoft-NetCore.App 8.0.12 [/snap/dotnet-sdk/255/sdk/shared/Microsoft.NetCore.App]

Other architectures found:
None

Environment variables:
Not set

global.json file:
Not found

Looking around the file system I cannot locate the executable that is launched by entering "uno-check" so per the instructions on the uno website I key in "~/dotnet/tools/uno-check" and I get the following display:

You will notice that the second line is generated in error. Indeed .net SDK and the .net Runtime are both installed on this system. they are version8. I conclude that the uno installer expects to find them at a different (hard-coded?) location. Also troublesome is that message offered as the solution in line 10 refers to version 6. It points to a web-based guide for installing v. 6 and is a technical nightmare to contemplate.

SO, I ask is uno supported on .net8 and if so how do I complete the install process beyond this point?

[jeromelaban]

Thanks for the question.

It looks like your system is not configured appropriately for running dotnet, and it looks like unoplatform/uno.check#349, most likely because DOTNET_ROOT is not set. It's not clear why some distributions do not have this variable set, and others do.

Could you tell how you installed .NET in the first place?

[jeromelaban]

Should I "Uninstall" all the .net stuff which is now in VSC?

Uno's vscode does not install .NET bits explicitly, but C# dev kit does to some extents depending on the distribution.

How do I do an adequate removal of .net8 if I don't know where all the component file are?

We're not explicitly supporting this distribution, so we can't tell, but given it's based on ubuntu, I'd guess it's similar to the original ubuntu.

Is there also a "Registry" clean required like there is in M.S. Windows?

That is general Linux question that is best asked on Linux forums.

What is the best method to use installing .netX ?

See this .NET documentation link, which uses official ubuntu feeds.

Should I install .net8 or .net9?

.NET 9 is best at this time.

[AfB102]

Thanks for your replies.

On the first point I did install C# dev extensions in VSC specifically authored by M.S. in the hopes that at least they would be a seamless integration, optimistic I know.

On the second item in your reply- I have done a search and have a procedure in front of me that describes the steps recommended so I will just have to try that. Google AI gladly spit that one out in seconds.

Thanks for the link on the fourth reply above. I'll look at it and see where it leads me.

I'll attempt a new install of .net9

Just as an aside. If I fail to get a proper launch of uno-check and a successful install of uno is doomed, what is the best way to clean away any remaining uno installation related files from my system? I already know I can uninstall the extension from within VSC.

[jeromelaban]

Just as an aside. If I fail to get a proper launch of uno-check and a successful install of uno is doomed, what is the best way to clean away any remaining uno installation related files from my system? I already know I can uninstall the extension from within VSC.

Uno is mainly an extension and dotnet nuget packages. If you remove both, it will return in a default state.

Note that running uno-check is mostly needed for installing some android and AOT webassembly dependencies. If you don't need that, you can use uno directly from Rider.

[AfB102]

I followed the install instructions for .net9 SDK from the link (official ubuntu feeds) you listed above. In all the reading I did so far it seems to be highly recommended that the source be the Ubuntu feeds NOT the M.S. sources.

So I opened a terminal and proceeded by submitting the code provided. The result was a stream of events that I screen copied . The copy is just below. I saw some errors reported but I have no idea whether or not they were critical and prevented a correct install. For all I know they may have been warnings or just not needed.

Previously I uninstalled the extensions to .net Installer and uno in the VSC application main screen.
I then reinstalled all but the uno extensions.

I will reinstall the uno extension sooner or later.

You see the line I was given to use (the first one in the screen shot above) attempts to install the SDK version 9.0 BUT when I now run dotnet --info at the command line it STILL reports:

I'm pretty much at my wit's end here not getting anything consistent with what I would expect.

[jeromelaban]

Thanks for the update. As I mentioned, we do not support Ubuntu MATE explicitly, and it definitely seems that the feeds from the official sources from ubuntu are not appropriate for your environment.

You may want to install .NET manually using the scripted install, which may be your way around using .NET 9.

Still, as you have .NET 8 installed, it should still be possible to create an app using dotnet new unoapp -tfm net8.0 -o MyProject, or by using https://new.platform.uno to select more options to create your project.