neovim: add undotree

neovim/.config/nvim/after/plugin/undotree.lua

@@ -0,0 +1,4 @@
+vim.opt.undodir = os.getenv("HOME") .. ".vim/undodir"
+vim.opt.undofile = true
+
+vim.keymap.set("n", "<leader>u", vim.cmd.UndotreeToggle)

neovim/.config/nvim/init.lua

@@ -47,6 +47,8 @@ require("packer").startup(function(use)
   use({ "williamboman/mason.nvim", "williamboman/mason-lspconfig.nvim" })
   use({ "jose-elias-alvarez/null-ls.nvim" })
 
+  use({ "mbbill/undotree" })
+
   if PACKER_BOOTSTRAP then
     require("packer").sync()
   end