fix: should redraw when buffer is unloaded and trying to open

Author: kyazdani42

lua/nvim-tree.lua

@@ -358,7 +358,7 @@ local function setup_vim_commands()
     command! NvimTreeClose lua require'nvim-tree'.close()
     command! NvimTreeToggle lua require'nvim-tree'.toggle()
     command! NvimTreeFocus lua require'nvim-tree'.focus()
-    command! NvimTreeRefresh lua require'nvim-tree'.refresh()
+    command! NvimTreeRefresh lua require'nvim-tree.lib'.refresh_tree(true)
     command! NvimTreeClipboard lua require'nvim-tree'.print_clipboard()
     command! NvimTreeFindFile lua require'nvim-tree'.find_file(true)
     command! -nargs=1 NvimTreeResize lua require'nvim-tree'.resize(<args>)
@@ -398,6 +398,7 @@ local function setup_autocommands(opts)
   if opts.update_focused_file.enable then
     vim.cmd "au BufEnter * lua require'nvim-tree'.find_file(false)"
   end
+  vim.cmd "au BufUnload NvimTree lua require'nvim-tree.view'.View.winnr = {}"
 
   vim.cmd "augroup end"
 end

lua/nvim-tree/lib.lua

@@ -460,12 +460,15 @@ function M.open()
   M.set_target_win()
 
   local cwd = vim.fn.getcwd()
-  view.open()
+  local should_redraw = view.open()
 
   local respect_buf_cwd = vim.g.nvim_tree_respect_buf_cwd or 0
   if respect_buf_cwd == 1 and cwd ~= M.Tree.cwd then
     M.change_dir(cwd)
   end
+  if should_redraw then
+    M.redraw()
+  end
 end
 
 function M.sibling(node, direction)

lua/nvim-tree/view.lua

@@ -302,7 +302,9 @@ local function is_buf_valid(bufnr)
 end
 
 function M.open(options)
+  local should_redraw = false
   if not is_buf_valid(M.View.bufnr) then
+    should_redraw = true
     create_buffer()
   end
 
@@ -320,6 +322,7 @@ function M.open(options)
 	if not opts.focus_tree then
 		vim.cmd("wincmd p")
 	end
+  return should_redraw
 end
 
 local function get_existing_buffers()