Not showing any completion for UnityEngine

[Falconerd]

Hello, I have tried a few things such as removing dotnet completely, having both dotnet and mono, installing msbuild from the AUR, installing the Unity Game Engine for Arch.

I am running the Unity Game Engine on Windows and trying to use Neovim through Arch on WSL2 as my text editor.

Auto-complete works for native C# such as List..., IEnumerator, etc. However nothing is coming up for the unity classes.

I'm unsure what else to do, any help is appreciated.

OS: Arch (via WSL2)
Editor: Neovim
Plugin: omnisharp-vim

OmniSharp log

3  {"Event":"log","Body":{"LogLevel":"INFORMATION","Name":"OmniSharp.Stdio.Host","Message":"Starting OmniSharp on arch 0.0 (x64)"},"Seq":1,"Type":"event"}
3  {"Event":"log","Body":{"LogLevel":"INFORMATION","Name":"OmniSharp.Services.DotNetCliService","Message":"DotNetPath set to dotnet"},"Seq":2,"Type":"event"}
3  {"Event":"log","Body":{"LogLevel":"INFORMATION","Name":"OmniSharp.MSBuild.Discovery.MSBuildLocator","Message":"Located 2 MSBuild instance(s)\n            1: Mono 16.4 - \"/usr/lib/mono/msbuild/Current/bin\"\n            2: StandAlone 16.4 - \"/home/falconerd/.cache/omnisharp-vim/omnisharp-roslyn/.msbuild/Current/Bin\""},"Seq":3,"Type":"event"}
3  {"Event":"log","Body":{"LogLevel":"INFORMATION","Name":"OmniSharp.MSBuild.Discovery.MSBuildLocator","Message":"Registered MSBuild instance: Mono 16.4 - \"/usr/lib/mono/msbuild/Current/bin\"\n            CscToolExe = csc.exe\n            CscToolPath = /home/falconerd/.cache/omnisharp-vim/omnisharp-roslyn/.msbuild/Current/Bin/Roslyn"},"Seq":4,"Type":"event"}
3  {"Event":"log","Body":{"LogLevel":"INFORMATION","Name":"OmniSharp.Cake.CakeProjectSystem","Message":"Detecting Cake files in '/mnt/c/Users/Dylan Falconer/dev/omnisharp-test'."},"Seq":5,"Type":"event"}
3  {"Event":"log","Body":{"LogLevel":"INFORMATION","Name":"OmniSharp.Cake.CakeProjectSystem","Message":"Could not find any Cake files"},"Seq":6,"Type":"event"}
3  {"Event":"log","Body":{"LogLevel":"INFORMATION","Name":"OmniSharp.MSBuild.ProjectSystem","Message":"No solution files found in '/mnt/c/Users/Dylan Falconer/dev/omnisharp-test'"},"Seq":7,"Type":"event"}
3  {"Event":"log","Body":{"LogLevel":"INFORMATION","Name":"OmniSharp.Script.ScriptProjectSystem","Message":"Detecting CSX files in '/mnt/c/Users/Dylan Falconer/dev/omnisharp-test'."},"Seq":8,"Type":"event"}
3  {"Event":"log","Body":{"LogLevel":"INFORMATION","Name":"OmniSharp.Script.ScriptProjectSystem","Message":"Could not find any CSX files"},"Seq":9,"Type":"event"}
3  {"Event":"log","Body":{"LogLevel":"INFORMATION","Name":"OmniSharp.WorkspaceInitializer","Message":"Invoking Workspace Options Provider: OmniSharp.Roslyn.CSharp.Services.CSharpFormattingWorkspaceOptionsProvider, Order: 0"},"Seq":10,"Type":"event"}
3  {"Event":"log","Body":{"LogLevel":"INFORMATION","Name":"OmniSharp.WorkspaceInitializer","Message":"Invoking Workspace Options Provider: OmniSharp.Roslyn.CSharp.Services.RenameWorkspaceOptionsProvider, Order: 100"},"Seq":11,"Type":"event"}
3  {"Event":"log","Body":{"LogLevel":"INFORMATION","Name":"OmniSharp.WorkspaceInitializer","Message":"Invoking Workspace Options Provider: OmniSharp.Roslyn.CSharp.Services.ImplementTypeWorkspaceOptionsProvider, Order: 110"},"Seq":12,"Type":"event"}
3  {"Event":"log","Body":{"LogLevel":"INFORMATION","Name":"OmniSharp.WorkspaceInitializer","Message":"Invoking Workspace Options Provider: OmniSharp.Roslyn.CSharp.Services.EditorConfigWorkspaceOptionsProvider, Order: 200"},"Seq":13,"Type":"event"}
3  {"Event":"log","Body":{"LogLevel":"INFORMATION","Name":"OmniSharp.WorkspaceInitializer","Message":"Configuration finished."},"Seq":14,"Type":"event"}
3  {"Event":"log","Body":{"LogLevel":"INFORMATION","Name":"OmniSharp.Stdio.Host","Message":"Omnisharp server running using Stdio at location '/mnt/c/Users/Dylan Falconer/dev/omnisharp-test' on host -1."},"Seq":15,"Type":"event"}
3  {"Event":"log","Body":{"LogLevel":"INFORMATION","Name":"OmniSharp.OmniSharpWorkspace","Message":"Miscellaneous file: /mnt/c/Users/Dylan Falconer/dev/omnisharp-test/Assets/ACSScript.cs added to workspace"},"Seq":18,"Type":"event"}

[SirIntruder]

3 {"Event":"log","Body":{"LogLevel":"INFORMATION","Name":"OmniSharp.MSBuild.ProjectSystem","Message":"No solution files found in '/mnt/c/Users/Dylan Falconer/dev/omnisharp-test'"},"Seq":7,"Type":"event"}

Omnisharp didn't find solution .sln file at all, and is targetting folder as a group of random .cs files. Most likely Unity didn't generate .sln and .csproj files at all. You will probably need to tweak with Unity preferences for external test editor.

[ijacquez]

On Linux, I generate my .sln files via a script, update-solution.sh. It calls Unity directly:

TERM="xterm" "${UNITY_PATH}" -projectPath "${PROJECT_PATH}" -batchmode -quit -nographics -logFile - -executeMethod "UnityEditor.SyncVS.SyncSolution"

You can guess what the environment variables are...

There is one slight problem in that even after I call the above, Omnisharp doesn't update. For example, if I add a file, it won't pick it up until I kill and restart the process.

[SirIntruder]

Normally, Unity regenerates csproj when you add a new file, and omnisharp picks up on that. Omnisharp never changes .csproj files.

[ijacquez]

Normally, Unity regenerates csproj when you add a new file, and omnisharp picks up on that. Omnisharp never changes .csproj files.

Yes, that's exactly right. However, Omnisharp doesn't pick up on it, not until I restart it. I'll verify what's happening.

[SirIntruder]

Potential failure point crossed my mind, o# relies on outside FileWatcherService (like the one in vscode), hooking into file system and sending "FileChanged" messages to omnisharp whenever any file in the directory gets changed. I don't think Omnisharp will respond on its own.

[filipw]

I don't think Omnisharp will respond on its own.

correct, the "change" event must be submitted by the editor

[ijacquez]

correct, the "change" event must be submitted by the editor

Thanks for the info. I'm (quickly) looking into Omnisharp for Emacs, and I don't see any "change" related event. I only see something like "updatebuffer".

[nickspoons]

We don't use a "change" event in OmniSharp-vim either, just /updateBuffer. There is no endpoint called /change, but there are /filesChanged and /changeBuffer, as well as /open and /close. In my experience in both .NET Core and .NET Framework, none of these are necessary. Although I'll admit to restarting the server after too many changes sometimes. I'd love a quick overview over what these endpoints do?