How do I exclude directories from the language server?

[nathanvy]

My project is structured as follows:

|
+- Makefile
+- .sln
+- src/
|      +-- *.cs/
|      +-- .csproj
+- staging/
|      +--- files get copied here for deploy
...

For deployment, the Makefile copies relevant items into staging/ and then rsync copies them to a remote server. I understand this is not modern devops but it's a long story. Anyways, the problem is that the .csproj file that lives in src/ also gets copied to the staging directory, and when that happens my editor picks up duplicates of everything, including the csproj file, and I get weird errors involving missing using directives and stuff.

I would like, therefore, to tell the language server to simply ignore anything under staging/ but it's not clear to me how I can accomplish this. Is what I'm after even possible?

[JoeRobich]

@nathanvy When you say "language server" do you mean Roslyn LSP?

[nathanvy]

Essentially, yes. I'm running Emacs rather than VS code but otherwise it's the same. Every time I run make deploy then the project file gets duplicated into the staging folder and then I'll get errors to do with e.g. MathNet or Npgsql not being found.

Whereas, if I delete the contents of the staging folder everything works as expected.

[nathanvy]

I should add that the errors are purely to do with the language server, because the project still compiles just fine. It's merely that the language server appears to get confused, which normally wouldn't bother me but the intellisense/completion stops working.

[jasonmalinowski]

So the language server itself isn't the one that has the logic of "see there's a .csproj there in staging"; we're only going to look at solution/project files that come through from the client via the project/open LSP message. Which would make me think your emacs client is the one telling us to do that...somewhere. Any chance it has a setting that's appropriate here?

[nathanvy]

Well, that was embarassing.

I dug into it and it turns out I had two language servers installed (this one and csharp-ls), emacs was prioritizing csharp-ls rather than roslyn-lsp, and it was csharp-ls that was behaving strangely and not roslyn. I don't recall ever installing csharp-ls on this machine! oops.

Thanks for the help.

[jasonmalinowski]

At least it's solved!