What's the proper way to use lsp?

[gcb]

tried to naive way:
$ cargo install slint-lsp

and then adding 'slint': ['slint-lsp', '~/.cargo/bin/slint-lsp'] to my list of linters on Vim ALE.

But that doesn't seem to be the right thing to do.

[tronical]

I don't think that we have support for linting in the LSP. But code completion, live-preview, etc. should work. You can find slightly more detailed instructions on how to integrate the lsp into Vim in our editors README.

[hunger]

Did you tell vim that the file type is slint? It won't start the LSP for any other type of file (see the README @tronical pointed you to).

I never used vim, neovim works pretty much out of the box, so it should work in vim as well.

[gcb]

I think it's the other way around. things that work on vim work on neovim.

but yes, i do have filetype set correctly.

autocmd BufRead,BufNewFile *.slint set filetype=slint

and i use ALE, not CoC, but it is also configured there:

let g:ale_linters = {
...
    \   'slint':  ['slint-lsp', '~/.cargo/bin/slint-lsp', ...several other path attempts],
...
let g:ale_fixers = {
   \ 'javascript': ['eslint'],
   \ 'slint': ['slint-lsp'],
}

I think the problem might be with this line from ALE doc:

All of ALE's completion information must come from Language Server Protocol linters, or from tsserver for TypeScript.

I guess neovim forces the lsp protocol and ALE+vim doesn't. so when it tries to load the lsp as a linter, the slint-lsp doesn't subscribe as a linter so it is never loaded? ..and then never used for completion/etc. (i know nothing of LSP protocols. i just smash them hard on my editors until they sort of work)

:ALEInfo
 Current Filetype: slint
Available Linters: []
  Enabled Linters: []
  Ignored Linters: []
 Suggested Fixers:
  'remove_trailing_lines' - Remove all blank lines at the end of a file.
  'trim_whitespace' - Remove all trailing whitespace characters at the end of every line.
 
 Global Variables:

[ogoffart]

Not a VIM user so i can't really help you. That said, slint-lsp is not a linter but it's a language server using the LSP, which i think is different.

If you figure it out, please let us know how we can document it better.

[hunger]

Neovim and vim are not that similar anymore, especially when it comes to LSP configuration.

I never used ALE, sorry. Looking at the repository, the rust LSP support has some more fields than yours: See here. Do you maybe need to add that lsp is stdio? You might also want to define a project root (if that is not defined by default already).