Fix empty dir icons updating incorrectly

lua/lib/lib.lua

@@ -92,6 +92,7 @@ end
 
 function M.unroll_dir(node)
   node.open = not node.open
+  if node.children_initial then node.children_initial = false end
   if #node.entries > 0 then
     renderer.draw(M.Tree, true)
   else

lua/lib/populate.lua

@@ -15,9 +15,8 @@ local path_to_matching_str = require'lib.utils'.path_to_matching_str
 local function dir_new(cwd, name)
   local absolute_path = cwd..'/'..name
   local stat = luv.fs_stat(absolute_path)
-  local handle = luv.fs_opendir(absolute_path, nil, 1)
-  local child = luv.fs_readdir(handle)
-  luv.fs_closedir(handle)
+  local handle = luv.fs_scandir(absolute_path)
+  local has_children = luv.fs_scandir_next(handle) ~= nil
   return {
     name = name,
     absolute_path = absolute_path,
@@ -26,7 +25,7 @@ local function dir_new(cwd, name)
     match_name = path_to_matching_str(name),
     match_path = path_to_matching_str(absolute_path),
     open = false,
-    has_children = child ~= nil,
+    children_initial = has_children,
     entries = {}
   }
 end

lua/lib/renderer.lua

@@ -238,8 +238,7 @@ local function update_draw_data(tree, depth, markers)
     local git_hl = get_git_hl(node)
 
     if node.entries then
-      local icon = get_folder_icon(node.open, node.link_to ~= nil, #node.entries ~= 0 or node.has_children)
-      if node.has_children then node.has_children = nil end
+      local icon = get_folder_icon(node.open, node.link_to ~= nil, #node.entries ~= 0 or node.children_initial)
       local git_icon = get_git_icons(node, index, offset, #icon+1) or ""
       -- INFO: this is mandatory in order to keep gui attributes (bold/italics)
       set_folder_hl(index, offset, #icon, #node.name+#git_icon, 'NvimTreeFolderName')