Failed to load Project with no error message

[sarahsturgeon]

OS: OSX
Vim: Neovim v0.9.0
Dotnet: 7.0.102 SDK

Opening a large monorepo and starting the OmniSharp server (only used the built-in Install command) with:

:OmniSharpStartSerever Project.sln

Leads to a Failed to load project message for every .csproj file in the monorepo, but it doesn't provide a reason for why it failed. i.e.:

Failed to load project: /Users/bsturgeon/RiderProjects/dotnet/src/Common/Utils/Utils.csproj

Just trying to figure out what I can do to debug this further.

Let me know if you need to know anything else about my setup. Thank you!

[nickspoons]

Have you looked in the log? :OmniSharpOpenLog

[sarahsturgeon]

Ahhh, there we go. Knew I was missing something obvious.

[fail]: OmniSharp.MSBuild.ProjectLoader
        The reference assemblies for ".NETFramework,Version=v7.0" were not found. You might be using an older .NET SDK to target .NET 5.0 or higher. Update Visual Studio and/or your .NET SDK.

Now I have an error to work with at least.

$dotnet --version
7.0.101

I clearly have dotnet 7.

$dotnet --list-sdks
3.1.301 [/usr/local/share/dotnet/sdk]
5.0.101 [/usr/local/share/dotnet/sdk]
5.0.303 [/usr/local/share/dotnet/sdk]
6.0.101 [/usr/local/share/dotnet/sdk]
7.0.101 [/usr/local/share/dotnet/sdk]

I also seem to have a lot of sdks installed.. wonder if it's getting confused or something

[nickspoons]

What OmniSharp-vim config do you have? This is a dotnet project (not Framework) so I think you'll need to be using the net6 build of omnisharp-roslyn. Do you have let g:OmniSharp_server_use_net6 = 1 in your config?

[sarahsturgeon]

The only configs I have set up for Omnisharp-vim are:

let g:OmniSharp_start_server = 0

I tried setting the SDK and useModernNet in ~/.config/.omnisharp/omnisharp.json, but I'll remove those unless you suggest I try them.

I'll try let g:OmniSharp_server_use_net6 = 1

[nickspoons]

After setting let g:OmniSharp_server_use_net6 = 1 you'll need to reinstall the server, :OmniSharpInstall. That downloads a different server build of omnisharp-roslyn.

[nickspoons]

By the way,

I tried setting the SDK and useModernNet in ~/.config/.omnisharp/omnisharp.json, but I'll remove those unless you suggest I try them.

The default path for system-wide omnisharp.json is ~/.omnisharp/omnisharp.json, it's not under ~/.config unluess you configured it with an OMNISHARPHOME environment variable

[sarahsturgeon]

Well then I guess it didn't make any difference, haha.

It does seem to be loading now!
The 180s timeout triggers, so I imagine the sheer number of .csproj files is just taking too long.
Could that cause any issues?

I used the bindings suggested in the Wiki, but is there an easy way to use CoC to handle the goto-def, find uses, etc.?

Thanks for the help, I appreciate it

[sarahsturgeon]

Also, is there any way to start the server in the background so I don't have to wait a couple of minutes every time I want to work on the project? Or do I have a misguided idea of how it works

[nickspoons]

Also, is there any way to start the server in the background so I don't have to wait a couple of minutes every time I want to work on the project? Or do I have a misguided idea of how it works

You have specifically stopped the server from loading automatically with let g:OmniSharp_server_use_net6 = 1. Or am i misunderstanding you?

[nickspoons]

Can you share a log please? I don't think it's working correctly yet - have you re-installed the server?

[sarahsturgeon]

Also, is there any way to start the server in the background so I don't have to wait a couple of minutes every time I want to work on the project? Or do I have a misguided idea of how it works

You have specifically stopped the server from loading automatically with let g:OmniSharp_server_use_net6 = 1. Or am i misunderstanding you?

Yes, I'm good with that. But when I do manually start the server, it takes about 2 minutes to load all of the csproj files.

So my question is; is there a way to start the server outside of vim and leave it running, so when I open vim the server is already running and ready to go, no csproj loading required.

All of the bindings are working as expected, so I think things are looking pretty good. If I can get closer CoC integration I'll be very happy

[nickspoons]

No vim can't interact with an external process that it hasn't started itself, so the only way to run language servers is for vim to start them and handle all of the input/output.

I don't really know what you mean by coc integration. Coc uses certain bindings for go-to-definition, find-usages etc. - just override those same bindings in .cs buffers.

[sarahsturgeon]

Ah, makes sense.

Maybe I could use the HTTP interaction instead? Could I do the whole background thing in that setup?

Good idea on the rebinds, simple and easy 👍

[nickspoons]

What you are describing is basically the only benefit to the HTTP version of the server, over stdio - yes it worked independently of vim that way.

Unfortunately that integration was also very limited and so is extremely light on features. The HTTP integration used python and hasn't been developed in several years. There is syntax highlighting but it's not highly accurate, there is no test runner, the log is much more basic. Essentially ... I don't recommend it.

If I were you I'd create personal .sln files to deal with the project or projects you are using. That is a matter of a few seconds:

dotnet new sln -n MyTempSolution
dotnet sln MyTempSolution.sln add Proj1.csproj
dotnet sln MyTempSolution.sln add Proj2.csproj

[sarahsturgeon]

That's a pretty good idea. Not ideal, but it's a fair compromise.

For projects that I don't add, will they be essentially invisible to find-usages, etc.?