refactor(inc-selection): simplify keymap and add error message

lua/nvim-treesitter/incremental_selection.lua

@@ -5,6 +5,7 @@ local ts_utils = require "nvim-treesitter.ts_utils"
 local locals = require "nvim-treesitter.locals"
 local parsers = require "nvim-treesitter.parsers"
 local queries = require "nvim-treesitter.query"
+local utils = require "nvim-treesitter.utils"
 
 local M = {}
 
@@ -138,22 +139,14 @@ function M.attach(bufnr)
   local config = configs.get_module "incremental_selection"
   for funcname, mapping in pairs(config.keymaps) do
     if mapping then
-      ---@type string, string|function
-      local mode, rhs
-      if funcname == "init_selection" then
-        mode = "n"
-        ---@type function
-        rhs = M[funcname]
+      local mode = funcname == "init_selection" and "n" or "x"
+      local rhs = M[funcname] ---@type function
+
+      if not rhs then
+        utils.notify("Unknown keybinding: " .. funcname .. debug.traceback(), vim.log.levels.ERROR)
       else
-        mode = "x"
-        rhs = M[funcname] ---@type function
+        vim.keymap.set(mode, mapping, rhs, { buffer = bufnr, silent = true, desc = FUNCTION_DESCRIPTIONS[funcname] })
       end
-      vim.keymap.set(
-        mode,
-        mapping,
-        rhs,
-        { buffer = bufnr, silent = true, noremap = true, desc = FUNCTION_DESCRIPTIONS[funcname] }
-      )
     end
   end
 end