Ruby-LSP and Rubocop cannot be disabled

[Nicktriez]

Summary

Ruby-lsp and Rubocop keeps starting despite being disabled.

Description

Zed docs notes that you can't use both Solargrapth and Ruby-lsp at the same time. But despite saying that, I've both running, and cannot turn of Ruby-lsp.

Steps to reproduce:

1. Open Zed and configure it not to use Ruby-lsp.
2. Generate new Rails project.
3. Open project in Zed.
4. Zed runs Ruby-lsp if an .ERB file is opened.

settings.json

Expected Behavior: I expect Ruby-lsp not to start when configured so in Zed settings. Even if I do have the gem installed.
Actual Behavior: Instead Zed tries to start Ruby-lsp no matter what. Even if I have uninstalled the gem and disabled it in Zed settings.

Zed Version and System Specs

Zed: v0.201.8 (Zed)
OS: Linux Wayland pop 24.04
Memory: 30.5 GiB
Architecture: x86_64
GPU: AMD Radeon RX 7900 GRE (RADV NAVI31) || radv || Mesa 25.1.5-1pop0175346342224.04~8af185e

[vitallium]

You need to disable ruby-lsp for HTML+ERB explicitly because Zed treats Ruby and HTML+ERB as two different file types:

{
  "languages": {
    "HTML/ERB": {
      "language_servers": [
        "!ruby-lsp"
      ],
      "formatter": {
        "external": {
          "command": "erb-formatter",
          "arguments": [
            "--stdin-filename",
            "{buffer_path}",
            "--print-width",
            "120"
          ]
        }
      }
    },
    "Ruby": {
      "language_servers": [
        "solargraph",
        "tailwindcss-language-server",
        "!rubocop",
        "!ruby-lsp"
      ]
    }
  }
}

Can you please try the configuration above? Thanks!

[vitallium]

But you made an excellent suggestion about explicitly disabling ruby-lsp for HTML+ERB. The Ruby extension has solargraph enabled by default, but opening any ERB file starts the Ruby LSP. I think that's strange, and we shouldn't do that. I will open a PR to disable Ruby LSP for HTML+ERB files. Thanks!