refactor: fix luals warnings

lua/lspconfig/configs.lua

@@ -2,6 +2,7 @@ local util = require 'lspconfig.util'
 local async = require 'lspconfig.async'
 local api, validate, lsp, fn = vim.api, vim.validate, vim.lsp, vim.fn
 local tbl_deep_extend = vim.tbl_deep_extend
+local nvim_eleven = vim.fn.has 'nvim-0.11' == 1
 
 local configs = {}
 
@@ -34,13 +35,13 @@ end
 ---@param config_name string
 ---@param config_def table Config definition read from `lspconfig.configs.<name>`.
 function configs.__newindex(t, config_name, config_def)
-  validate {
-    name = { config_name, 's' },
-    default_config = { config_def.default_config, 't' },
-    on_new_config = { config_def.on_new_config, 'f', true },
-    on_attach = { config_def.on_attach, 'f', true },
-    commands = { config_def.commands, 't', true },
-  }
+  if nvim_eleven then
+    validate('name', config_name, 'string')
+    validate('default_config', config_def.default_config, 'table')
+    validate('on_new_config', config_def.on_new_config, 'function', true)
+    validate('on_attach', config_def.on_attach, 'function', true)
+    validate('commands', config_def.commands, 'table', true)
+  end
 
   if config_def.default_config.deprecate then
     vim.deprecate(
@@ -53,11 +54,11 @@ function configs.__newindex(t, config_name, config_def)
   end
 
   if config_def.commands then
-    for k, v in pairs(config_def.commands) do
-      validate {
-        ['command.name'] = { k, 's' },
-        ['command.fn'] = { v[1], 'f' },
-      }
+    if nvim_eleven then
+      for k, v in pairs(config_def.commands) do
+        validate('command.name', k, 'string')
+        validate('command.fn', v[1], 'function')
+      end
     end
   else
     config_def.commands = {}
@@ -74,24 +75,18 @@ function configs.__newindex(t, config_name, config_def)
   function M.setup(user_config)
     local lsp_group = api.nvim_create_augroup('lspconfig', { clear = false })
 
-    validate {
-      cmd = {
-        user_config.cmd,
-        { 'f', 't' },
-        true,
-      },
-      root_dir = { user_config.root_dir, { 's', 'f' }, true },
-      filetypes = { user_config.filetype, 't', true },
-      on_new_config = { user_config.on_new_config, 'f', true },
-      on_attach = { user_config.on_attach, 'f', true },
-      commands = { user_config.commands, 't', true },
-    }
-    if user_config.commands then
-      for k, v in pairs(user_config.commands) do
-        validate {
-          ['command.name'] = { k, 's' },
-          ['command.fn'] = { v[1], 'f' },
-        }
+    if nvim_eleven then
+      validate('cmd', user_config.cmd, { 'function', 'table' }, true)
+      validate('root_dir', user_config.root_dir, { 'string', 'function' }, true)
+      validate('filetypes', user_config.filetype, 'table', true)
+      validate('on_new_config', user_config.on_new_config, 'function', true)
+      validate('on_attach', user_config.on_attach, 'function', true)
+      validate('commands', user_config.commands, 'table', true)
+      if user_config.commands then
+        for k, v in pairs(user_config.commands) do
+          validate('command.name', k, 'string')
+          validate('command.fn', v[1], 'function')
+        end
       end
     end
 

lua/lspconfig/util.lua

@@ -28,9 +28,9 @@ function M.bufname_valid(bufname)
 end
 
 function M.validate_bufnr(bufnr)
-  validate {
-    bufnr = { bufnr, 'n' },
-  }
+  if nvim_eleven then
+    validate('bufnr', bufnr, 'number')
+  end
   return bufnr == 0 and api.nvim_get_current_buf() or bufnr
 end
 
@@ -174,7 +174,9 @@ M.path = (function()
 end)()
 
 function M.search_ancestors(startpath, func)
-  validate { func = { func, 'f' } }
+  if nvim_eleven then
+    validate('func', func, 'function')
+  end
   if func(startpath) then
     return startpath
   end
@@ -192,14 +194,6 @@ function M.search_ancestors(startpath, func)
   end
 end
 
-function M.tbl_flatten(t)
-  return nvim_eleven and vim.iter(t):flatten(math.huge):totable() or vim.tbl_flatten(t)
-end
-
-function M.get_lsp_clients(filter)
-  return nvim_eleven and lsp.get_clients(filter) or lsp.get_active_clients(filter)
-end
-
 local function escape_wildcards(path)
   return path:gsub('([%[%]%?%*])', '\\%1')
 end
@@ -326,6 +320,18 @@ function M.strip_archive_subpath(path)
   return path
 end
 
+--- Functions that can be removed once minimum required neovim version is high enough
+
+function M.tbl_flatten(t)
+  --- @diagnostic disable-next-line:deprecated
+  return nvim_eleven and vim.iter(t):flatten(math.huge):totable() or vim.tbl_flatten(t)
+end
+
+function M.get_lsp_clients(filter)
+  --- @diagnostic disable-next-line:deprecated
+  return nvim_eleven and lsp.get_clients(filter) or lsp.get_active_clients(filter)
+end
+
 --- Deprecated functions
 
 --- @deprecated use `vim.fn.isdirectory(path) == 1` instead

plugin/lspconfig.lua

@@ -45,7 +45,7 @@ local get_clients_from_cmd_args = function(arg)
     return ''
   end)
   for id in (arg or ''):gmatch '(%d+)' do
-    local client = lsp.get_client_by_id(tonumber(id))
+    local client = lsp.get_client_by_id(assert(tonumber(id)))
     if client == nil then
       err_msg = err_msg .. ('client id "%s" not found\n'):format(id)
     end