FixCurrent script for code actions in neovim in Lua

fixcurrent.lua

return function()
	local params = vim.lsp.util.make_range_params() -- get params for current position
	params.context = {
		diagnostics = vim.lsp.diagnostic.get_line_diagnostics(),
		only = { "quickfix" },
	}

	local actions_per_client, err = vim.lsp.buf_request_sync(
		0,
		"textDocument/codeAction",
		params,
		900
	)

	if err then
		return
	end

	if actions_per_client == nil or vim.tbl_isempty(actions_per_client) or #actions_per_client == 0 then
		vim.notify("no quickfixes available")
		return
	end

	-- Collect the available actions
	local actions = {}
	for cid, resp in pairs(actions_per_client) do
		if resp.result ~= nil then
			for _, result in pairs(resp.result) do
				-- add the actions with a cid to the table
				local action = {}
				action["cid"] = cid
				for k, v in pairs(result) do
					action[k] = v
				end
				table.insert(actions, action)
			end
		end
	end

	-- Try to find a preferred action.
	local preferred_action = nil
	for _, action in ipairs(actions) do
		if action.isPreferred then
			preferred_action = action
			break
		end
	end

	-- If we failed to find a preferred action, try to find a non-null-ls action.
	local non_null_ls_action = nil
	for _, action in ipairs(actions) do
		if action.command ~= "NULL_LS_CODE_ACTION" then
			non_null_ls_action = action
			break
		end
	end

	-- If we failed to find a non-null-ls action, use the first one.
	local first_action = nil
	if #actions > 0 then
		first_action = actions[1]
	end

	-- Using null-ls a lot of quickfixes are returned but all tend to be
	-- worse than what the real LSP is offering, we try to use other
	-- actions first, then only fall back to whatever null-ls is offering.
	local top_action = preferred_action or non_null_ls_action or first_action

	-- print(vim.inspect(top_action))

	local picked_one = false

	vim.lsp.buf.code_action({
		context = {
			only = { "quickfix" },
		},
		filter = function(action, ctx)
			if picked_one then
				return true
			elseif top_action ~= nil and action.title == top_action.title then
				picked_one = true
				return false
			else
				return true
			end
		end,
		apply = true,
	})
end

init.lua

local on_attach = function(client, bufnr)
	local nmap = function(keys, func, desc)
		if desc then
			desc = "LSP: " .. desc
		end

		vim.keymap.set("n", keys, func, { buffer = bufnr, desc = desc })
	end

  nmap("gq", require("fixcurrent"), "[G]o [Q]uickfix")
end

local servers = {
	gopls = {},
	-- pyright = {},
	rust_analyzer = {},
	tsserver = {},
	lua_ls = {
		Lua = {
			workspace = { checkThirdParty = false },
			telemetry = { enable = false },
		},
	},
}

local capabilities = vim.lsp.protocol.make_client_capabilities()

-- Setup mason so it can manage external tooling
require("mason").setup()

-- Ensure the servers above are installed
local mason_lspconfig = require("mason-lspconfig")

mason_lspconfig.setup({
	ensure_installed = vim.tbl_keys(servers),
})

mason_lspconfig.setup_handlers({
	function(server_name)
		require("lspconfig")[server_name].setup({
			capabilities = capabilities,
			on_attach = on_attach,
			settings = servers[server_name],
		})
	end,
})

Yes, it does. I removed the part about null-ls as I use jdtls with neovim-lsp directly, so it's just local top_action = actions[1]. The error I got is

E5108: Error executing lua: /usr/share/nvim/runtime/lua/vim/lsp/buf.lua:796: command: expected string, got nil

and a stack trace pointing to https://gist.github.com/alextes/e6704e5376709d194d21f615f8542ccb#file-init-lua-L10. Seems like a validate() call inside vim.lsp.buf.execute_command expects the argument passed in to be a table containing command key, but the action object here does not have that key.

{
  cid = 1,
  data = {
    pid = "0",
    rid = "0"
  },
  diagnostics = { {
      code = "570425394",
      data = { "Micronaut" },
      message = "Micronaut cannot be resolved",
      range = {
        ["end"] = {
          character = 17,
          line = 4
        },
        start = {
          character = 8,
          line = 4
        }
      },
      severity = 1,
      source = "Java"
    } },
  kind = "quickfix",
  title = "Import 'Micronaut' (io.micronaut.runtime)"
}

I don't know much about LSP or Neovim API, so I can't fix it for now. Just commented to show appreciation, as all the language servers I used advertised isPreferred support, but none have that key in the action :|

@duongdominhchau my bad! I didn't notice what you're looking at is very old!! I'll update the gist right now.

Thanks for the appreciation 💛

Thank you for the update. I tried this new config but cannot autofix with Ruff, to make it works, I flipped the boolean value returned from filter and remove the only = "quickfix". It sounds reasonable to me, not sure why it needs to be removed 🤷

Writing it here in case someone else gets into the same issue as me.

Edit: Wonderful, the new solution works with both jdtls and ruff_lsp. Thanks again.