Helix seems to run all available language server

[lalala-233]

For example, I have installed marksman and markdown-oxide.

helix --health markdown
Configured language servers:
  ✓ marksman: /usr/bin/marksman
  ✓ markdown-oxide: /usr/bin/markdown-oxide
Configured debug adapter: None
Configured formatter: None
Tree-sitter parser: ✓
Highlight queries: ✓
Textobject queries: ✘
Indent queries: ✘

Then, when I open a markdown file, helix will start two language servers, instead of the first one in languages.toml.

It is also mentioned in some issues, like #12153.

I think it's better to run the first available language-server if users don't specify it.

It also allows us to support more lsp without requiring user to edit ~/.config/helix/languages.toml

---

Official document metioned that

it's often useful to only enable/disable certain language-server features for these language servers.

It's usually to compose different features from different language-server, but I think it's better to specify to use more than one lsp explicitly instead of by default.

---

But changing default behaviour may break something, though, I think this change will not break anything unless someone rely on it (people ususally use only one lsp at one time, right?).

An possible way is to provide a flag field to control if you'd like to start all lsp. Another way is to provide a field to specify fallback lsp if default lsp is not available.

Did you like this idea? I'd like to create a pr.

[the-mikedavis]

This is intentional so that you can run multiple language servers with different capabilities. There are some languages like Python where we have a few competing language servers and selecting the first available might make sense. But the current behavior should be kept as default.

The original point of the language-servers key being an array is that you should be able to run multiple language servers at once on one document.

[lalala-233]

Running multiple lsp at once is great. But it is useful only when you need it.

I think running only one lsp is better if you don't explicitly specify.

So how about adding a new field allow us to add fallback list? Currently we use language-servers for both running multiple server (you need some configuration) and fallback list (default config file, like

helix/languages.toml

Line 2089 in 14eda10

language-servers = [ "marksman", "markdown-oxide", "rumdl" ]

). It is strange when you find multiple lsp are running without configuration.