kak-lsp Log shows `Language server is not initialized`

Question

I have installed kak-lsp successfully with plug.kak. I have placed the kak-lsp.toml in ~/.config/kak-lsp/kak-lsp.toml. For the rustlang part it looks like this:

[language.rust]
filetypes = ["rust"]
roots = ["Cargo.toml"]
command = "sh"
args = ["-c", "if command -v rustup >/dev/null; then $(rustup which rls); else rls; fi"]

However, when I launch kakoune, it doesn't autocomplete or anything, except it only shows warning for unused variables(and stuff like this). So I turned on the logs, and it gave me this output:

Jun 30 04:29:35.209 DEBG Language server is not initialized, parking request, module: kak_lsp::controller:100

The full log is here

What am I missing?

Answer 1

your log contains

lsp-handle-progress 'Building'

This means that rls is just not fully ready yet. It needs to build the entire crate to find all references. This can take a few minutes, depending on the size of your project. The result will be cached in target/rls, so it will be much faster on subsequent launches.

Note that the default implementation of lsp-handle-progress doesn't do anything. You can override it to show messages with echo or info.