feat(cmp): create undo point right before confirming a completion

lua/lazyvim/plugins/coding.lua

@@ -36,7 +36,15 @@ return {
           ["<C-f>"] = cmp.mapping.scroll_docs(4),
           ["<C-Space>"] = cmp.mapping.complete(),
           ["<C-e>"] = cmp.mapping.abort(),
-          ["<CR>"] = cmp.mapping.confirm({ select = true }), -- Accept currently selected item. Set `select` to `false` to only confirm explicitly selected items.
+          ["<CR>"] = function(fallback)
+            if cmp.visible() then
+              LazyVim.create_undo()
+              if cmp.confirm({ select = true }) then
+                return
+              end
+            end
+            return fallback()
+          end,
           ["<S-CR>"] = cmp.mapping.confirm({
             behavior = cmp.ConfirmBehavior.Replace,
             select = true,

lua/lazyvim/util/init.lua

@@ -190,4 +190,12 @@ function M.dedup(list)
   return ret
 end
 
+M.CREATE_UNDO = vim.api.nvim_replace_termcodes("<c-G>u", true, true, true)
+function M.create_undo()
+  if vim.api.nvim_get_mode().mode == "i" then
+    dd("undo")
+    vim.api.nvim_feedkeys(M.CREATE_UNDO, "n", false)
+  end
+end
+
 return M