How to build and debug in a Linux distribution using VSCode?

[PlatinumLucario]

I must be missing something really important, because attempting to build this results in a System.ArgumentNullException.

Surely, it must be because it was missing the libraries that Gir.Core needs, right? Well as soon as I put all the needed libraries into the same directory as the executable, this happened:

It looks like it opened successfully, but nothing opened. So I'm really curious, is there anything I'm missing? I've installed all the dependencies that were listed in the readme.

[fsobolev]

Surely, it must be because it was missing the libraries that Gir.Core needs, right?

No. It's not enough to use only dotnet to build the app, there is extra stuff (gresource and *ui files), and so there is justfile for a reason. If I'm not mistaken, the error you got initially is because *.ui files are not found in the assembly - because they were not compiled using blueprint-compiler. I'm not familiar with VSCode enough so I can't say unfortunately how to properly change launch configuration, but what you essentially want is to execute just run.
But what happens on the second screenshot is a mystery to me. I can only say that it's not required to move libs to the folder with executable.

[PlatinumLucario]

Brilliant! Thank you! I was missing the blueprint-compiler and just packages. That's what I needed for how this project is set up.

[fsobolev]

My previous answer became obsolete, since we moved to Cake build system and also some parts of building process were moved to csproj file, so now dotnet run works fine, there's no need for a special command to simply build and run the app (although blueprint-compiler is still needed, but not just). But for publishing and installing commands, see CONTRIBUTING.md.