Put configuration elements in different files

conf/nvim/lua/functions.lua

@@ -0,0 +1,17 @@
+function map(key)
+  -- get the extra options
+  local opts = {noremap = true}
+  for i, v in pairs(key) do
+    if type(i) == 'string' then opts[i] = v end
+  end
+
+  -- basic support for buffer-scoped keybindings
+  local buffer = opts.buffer
+  opts.buffer = nil
+
+  if buffer then
+    vim.api.nvim_buf_set_keymap(0, key[1], key[2], key[3], opts)
+  else
+    vim.api.nvim_set_keymap(key[1], key[2], key[3], opts)
+  end
+end