Timeout in neovim LSP

[jheuel]

Problem description

Trying to format the current neovim buffer using vim.lsp.buf.format fails with a message that the LSP times out. It runs instantly if I only use rustfmt without leptosfmt. Increasing the timeout to 5s still fails, while running leptosfmt . on the whole project in the terminal finishes in well under a second. My system is a M1 MacBook Pro.

Configuration

Leptosfmt is configured in the recommended way by creating a rust-analyzer.toml with the content

[rustfmt] 
overrideCommand = ["leptosfmt", "--stdin", "--rustfmt"]

[bryanmaina]

I have a similar issue. Running it directedly in the terminal hangs for ever.

I have the override in my rustaceanvim config and conform.nvim runs it with

timeout_ms = 1000,
lsp_fallback = false,
async = false,

It does format the code inside view! and does not format outside of it. My guess is that it does well on the leptos parts and gives up on rustfmt parts.

I have added vim.g.rustfmt_autosave = 1 my config to be able to format the code outside of the view! macro and I will wait for this command to return to its normal behavior.

[bryanmaina]

I have done some extra experiments. Turns out it works as expected with some tweaks in my particular config.

I had conform formatter set to "rustfmt" and the override in rustaceanvim as follow:

server = {
	default_settings = {
		["rust-analyzer"] = {
			rustfmt = {
				overrideCommand = { "leptosfmt", "--stdin", "--rustfmt" },
			 },
               } 
       }
}

And this was just not working as expected. I removed the override from the rust-analyzer config , set the formatter in conform.nvim config to rust = { "leptosfmt" } and customized the formatter it by adding prepend_args without "stdin" because conform.nvim already adds it.

		formatters = {
			leptosfmt = {
				prepend_args = { "--rustfmt" },
			},
		},

Here is my full config with conform.nvim that works as expected

return {
	"stevearc/conform.nvim",
	event = { "BufReadPre", "BufNewFile" },
	keys = {
		{
			"<leader>cf",
			desc = "Format current file",
			function()
				require("conform").format({
					lsp_fallback = false,
					async = false,
					timeout_ms = 1000,
				})
			end,
			mode = { "n", "v" },
		},
	},
	opts = {
		formatters_by_ft = {
			astro = { "prettierd" },
			bash = { "beautysh" },
			css = { "prettierd" },
			erb = { "htmlbeautifier" },
			graphql = { "prettierd" },
			go = { "gofmt" },
			html = { "htmlbeautifier" },
			java = { "google-java-format" },
			kotlin = { "ktlint" },
			javascript = { "prettierd" },
			javascriptreact = { "prettierd" },
			json = { "prettierd" },
			lua = { "stylua" },
			markdown = { "prettierd" },
			proto = { "buf" },
			ruby = { "standardrb" },
			rust = { "leptosfmt" },
			scss = { "prettierd" },
			sh = { "shellcheck" },
			svelte = { "prettierd" },
			toml = { "taplo" },
			typescript = { "prettierd" },
			typescriptreact = { "prettierd" },
			xml = { "xmllint" },
			-- yaml = { "yamlfix" },
		},
		formatters = {
			leptosfmt = {
				prepend_args = { "--rustfmt" },
			},
		},
	},
}

I am kind of lost. I have no idea why it stopped working with the previous config. Maybe something related to the rust-analyzer configs it self or the environment(WSL).