fix: fixes #9, empty highlight group errors. also add missing plugins dir

Author: cseickel

README.md

@@ -10,7 +10,11 @@ Example for packer:
     use {
         "nvim-neo-tree/neo-tree.nvim",
         branch = "v1.x",
-        requires = { "MunifTanjim/nui.nvim" },
+        requires = { 
+          "nvim-lua/plenary.nvim",
+          "kyazdani42/nvim-web-devicons", -- not strictly required, but recommended
+          "MunifTanjim/nui.nvim" 
+        },
         config = function ()
             require("neo-tree").setup()
             vim.cmd([[nnoremap \ :NeoTreeReveal<cr>]])

lua/neo-tree/ui/highlights.lua

@@ -61,6 +61,8 @@ local function create_highlight_group(hl_group_name, link_to_if_exists, backgrou
     end
     if foreground then
       cmd = cmd .. " guifg=#" .. foreground
+    else
+      cmd = cmd .. " guifg=NONE"
     end
     if gui then
       cmd = cmd .. " gui=" .. gui

plugin/neo-tree.vim

@@ -0,0 +1,9 @@
+if exists('g:loaded_neo_tree')
+  finish
+endif
+let g:loaded_neo_tree = 1
+
+command! NeoTreeClose  lua require("neo-tree").close()
+command! NeoTreeFocus  lua require("neo-tree").focus()
+command! NeoTreeShow   lua require("neo-tree").show(nil, true)
+command! NeoTreeReveal lua require("neo-tree.sources.filesystem").reveal_current_file()