refactor: fix luals warnings

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
@@ -245,6 +239,7 @@ function M.get_active_clients_list_by_ft(filetype)
   local clients = M.get_lsp_clients()
   local clients_list = {}
   for _, client in pairs(clients) do
+    --- @diagnostic disable-next-line:undefined-field
     local filetypes = client.config.filetypes or {}
     for _, ft in pairs(filetypes) do
       if ft == filetype then
@@ -326,6 +321,18 @@ 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

scripts/docgen.lua

@@ -278,10 +278,9 @@ local function make_implemented_servers_list()
 end
 
 local function generate_readme(template_file, params)
-  vim.validate {
-    lsp_server_details = { params.lsp_server_details, 's' },
-    implemented_servers_list = { params.implemented_servers_list, 's' },
-  }
+  vim.validate('lsp_server_details', params.lsp_server_details, 'string')
+  vim.validate('implemented_servers_list', params.implemented_servers_list, 'string')
+
   local input_template = readfile(template_file)
   local readme_data = template(input_template, params)