From 1b04082872aaa4b58f0259a2b049402a88be67b6 Mon Sep 17 00:00:00 2001
From: kiyan <yazdani.kiyan@protonmail.com>
Date: Thu, 30 Sep 2021 13:17:05 +0200
Subject: [PATCH] fix: do not display empty string or nil callbacks in help
 view

---
 lua/nvim-tree/renderer/init.lua | 4 +++-
 lua/nvim-tree/view.lua          | 2 +-
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/lua/nvim-tree/renderer/init.lua b/lua/nvim-tree/renderer/init.lua
index 4e9f9bcf..ab57e8c3 100644
--- a/lua/nvim-tree/renderer/init.lua
+++ b/lua/nvim-tree/renderer/init.lua
@@ -354,7 +354,9 @@ local M = {}
 function M.draw_help()
   local help_lines = {'HELP'}
   local help_hl = {{'NvimTreeRootFolder', 0, 0, #help_lines[1]}}
-  local mappings = view.View.mappings
+  local mappings = vim.tbl_filter(function(v)
+    return v.cb ~= nil and v.cb ~= ""
+  end, view.View.mappings)
   local processed = {}
   for _, b in pairs(mappings) do
     local cb = b.cb
diff --git a/lua/nvim-tree/view.lua b/lua/nvim-tree/view.lua
index ca94f389..40d6481a 100644
--- a/lua/nvim-tree/view.lua
+++ b/lua/nvim-tree/view.lua
@@ -98,7 +98,7 @@ local function create_buffer()
       for _, key in pairs(b.key) do
         a.nvim_buf_set_keymap(M.View.bufnr, b.mode or 'n', key, b.cb, { noremap = true, silent = true, nowait = true })
       end
-    else
+    elseif b.cb then
       a.nvim_buf_set_keymap(M.View.bufnr, b.mode or 'n', b.key, b.cb, { noremap = true, silent = true, nowait = true })
     end
   end