split custom._utils into meaningful modules

after/plugin/init.lua

@@ -15,7 +15,7 @@ vim.api.nvim_create_autocmd({ "BufEnter", "WinEnter" }, {
   callback = function()
     local extra_whitespaces = ""
 
-    if require("custom._utils").is_in(vim.bo.filetype, {
+    if require("custom.list").is_in(vim.bo.filetype, {
           "", "aerial", "help", "presenting_markdown", "neo-tree", "git"
         }) then
       extra_whitespaces = "//"

lua/custom/keymap.lua

+local M = {}
+
+function M.nmap(keys, func, desc, bufnr)
+  vim.keymap.set('n', keys, func, { buffer = bufnr, silent = true, noremap = true, desc = desc })
+end
+
+return M

lua/custom/_utils.lua → lua/custom/list.lua

 local M = {}
 
-function M.nmap(keys, func, desc, bufnr)
-  vim.keymap.set('n', keys, func, { buffer = bufnr, silent = true, noremap = true, desc = desc })
-end
-
 -- return true if the `value` is inside the `list`, false otherwise
 function M.is_in(value, list)
   for _, item in ipairs(list) do

lua/custom/plugins/harpoon.lua

@@ -4,7 +4,7 @@ return {
     config = function()
       local mark = require("harpoon.mark")
       local ui = require("harpoon.ui")
-      local nmap = require("custom._utils").nmap
+      local nmap = require("custom.keymap").nmap
 
       nmap("<leader>ha", mark.add_file)
       nmap("<leader>he", ui.toggle_quick_menu)

plugin/keymap/lists.lua

-local nmap = require("custom._utils").nmap
+local nmap = require("custom.keymap").nmap
 
 -- quickfix
 nmap("<leader>co", "<cmd>copen<CR>")

plugin/keymap/splits.lua

-local nmap = require("custom._utils").nmap
+local nmap = require("custom.keymap").nmap
 
 -- Maximize, close and equalize
 nmap("<leader>wm", "<C-w>_<C-w>|")