[Bug] None-ls plugin trying to spawn multiple instances of the none-ls language server

[foxyseta]

I am unable to use the bug report issue template, as I am having trouble reproducing my problem on a minimal config.

Steps to reproduce

This happens when I start neovim on some files.

Actual behaviour

On startup, I get the following error message:

[null-ls] failed to start null-ls client with config: {
  cmd = <function 1>,
  filetypes = { "fish", "gitcommit", "yaml", "lua", "luau", "typst", "typ", "text", "org", "markdown" },
  flags = {
    debounce_text_changes = 250
  },
  name = "null-ls",
  on_attach = <function 2>,
  on_exit = <function 3>,
  on_init = <function 4>,
  root_dir = "/home/foxy/desktop/phd/research/den-sem-ho-lang"
}

Still, the LS is correctly attached to my buffer. So my guess is that the plugin is attempting to spawn multiple LS instances for the same buffer.

Proposed solution

Before this invocation

none-ls.nvim/lua/null-ls/client.lua

Line 150 in c9317c2

id = lsp.start(config)

,

would it be possible to check if none-ls is already attached to the buffer? Only if it is not, we should try to spawn a new instance.