Ergonomic ability to restart with updated settings

[ModProg]

Language server

rust-analyzer

Requested feature

I want to be able to activate Features and change the target, for which I need to restart the language server.

I'm currently doing this:

function RustTarget(target)
    for _, client in ipairs(vim.lsp.get_active_clients()) do
        if client.name == "rust_analyzer" then
            local settings = client.config.settings
            client.stop()
            settings["rust-analyzer"] = vim.tbl_deep_extend("force",
            settings["rust-analyzer"], { cargo = { target = target } })

            local config = require("lspconfig.configs")["rust_analyzer"]
            config.setup({
                settings = settings
            })

            config.launch()
        end
    end
end

Ideally, I'd like a way to do client.restart({settings = updated_settings}).

It would also be nice, if I could get a better way to access a client i.e.

something_get_client("rust-analyzer")
-- instead of
for _, client in ipairs(vim.lsp.get_active_clients()) do
    if client.name == "rust_analyzer" then

Other clients which have this feature

No response