Add disableDiagnostics setting

I’m not yet using coc-rust-analyzer, my old setup is:

  let languageservers = {}

  let languageservers['rust'] = {
  \   'command': 'ra_lsp_server',
  \   'filetypes': ['rust'],
  \   'rootPatterns': ['Cargo.toml'],
  \   'disableDiagnostics': v:true
  \ }

  call coc#config('languageserver', languageservers)

Having disableDiagnostics is important in my setup because at the moment rust-analyzer isn’t useful for diagnostics, so I’m using ALE with RLS for that. I’m not sure whether I can already use this setting with coc-rust-analyzer or it needs to be added.

[oblitum]

@JeanMertz thanks for you report, that makes me give it a try 😃

[JeanMertz]

but I believe I’ll stick RLS bc it feels a lighter solution.

For what it’s worth, I’m using this plugin with cargo-watch (using clippy instead of check), and have had no issues with performance or heaviness.

Contrast that to the past when I used RLS, which could take 10+ seconds before it gave back any feedback after making a change to a document in a larger project.

I’m definitely going to check out your solution, but I have the opposite feeling of finding RLS heavyweight and RA+Clippy lightweight. Perhaps that feeling is no longer justified, so I’m definitely going to give it a go!