Create undotree.lua

lua/lazyvim/plugins/extras/editor/undotree.lua

@@ -0,0 +1,26 @@
+return {
+  {
+    "mbbill/undotree",
+    cmd = "UndotreeToggle",
+    keys = {
+      -- [U]ndo [T]ree
+      { "<leader>uT", "<cmd>UndotreeToggle<cr>", desc = "Undo Tree Toggle" },
+    },
+    init = function()
+      -- Persist undo, refer https://github.com/mbbill/undotree#usage
+      local undodir = vim.fn.expand("~/.undo-nvim")
+
+      if vim.fn.has("persistent_undo") == 1 then
+        if vim.fn.isdirectory(undodir) == 0 then
+          os.execute("mkdir -p " .. undodir)
+        end
+
+        vim.opt.undodir = undodir
+        vim.opt.undofile = true
+      end
+
+      -- set layout style to 2, let g:undotree_WindowLayout = 2
+      vim.g.undotree_WindowLayout = 2
+    end,
+  },
+}