chore: add guards to prepare setup refactoring

lua/nvim-tree.lua

@@ -183,6 +183,8 @@ local function update_base_dir_with_filepath(filepath, bufnr)
 end
 
 function M.find_file(with_open)
+  if not with_open and not TreeExplorer then return end
+
   local bufname = vim.fn.bufname()
   local bufnr = api.nvim_get_current_buf()
   local filepath = vim.fn.fnamemodify(bufname, ':p')
@@ -224,6 +226,7 @@ function M.on_leave()
   end, 50)
 end
 
+-- TODO: rewrite this to take into account setup by open
 function M.open_on_directory()
   local should_proceed = _config.update_to_buf_dir.auto_open or view.win_open()
   if not _config.update_to_buf_dir.enable or not should_proceed then

lua/nvim-tree/actions/change-dir.lua

@@ -10,6 +10,8 @@ local M = {
 }
 
 function M.fn(name)
+  if not TreeExplorer then return end
+
   local foldername = name == '..' and vim.fn.fnamemodify(utils.path_remove_trailing(TreeExplorer.cwd), ':h') or name
   local no_cwd_change = vim.fn.expand(foldername) == TreeExplorer.cwd
   local new_tab = a.nvim_get_current_tabpage()

lua/nvim-tree/actions/reloaders.lua

@@ -33,7 +33,7 @@ end
 
 local event_running = false
 function M.reload_explorer(callback)
-  if event_running or not TreeExplorer.cwd or vim.v.exiting ~= vim.NIL then
+  if event_running or not TreeExplorer or not TreeExplorer.cwd or vim.v.exiting ~= vim.NIL then
     return
   end
   event_running = true
@@ -52,7 +52,7 @@ function M.reload_explorer(callback)
 end
 
 function M.reload_git()
-  if not git.config.enable or event_running then
+  if not TreeExplorer or not git.config.enable or event_running then
     return
   end
   event_running = true

lua/nvim-tree/lib.lua

@@ -47,6 +47,7 @@ local function get_node_at_line(line)
 end
 
 function M.get_node_at_cursor()
+  if not TreeExplorer then return end
   local winnr = view.get_winnr()
   local hide_root_folder = view.View.hide_root_folder
   if not winnr then

lua/nvim-tree/renderer/init.lua

@@ -371,7 +371,7 @@ end
 local M = {}
 
 function M.draw()
-  if not TreeExplorer or not api.nvim_buf_is_loaded(view.View.bufnr) then
+  if not TreeExplorer or not view.View.bufnr or not api.nvim_buf_is_loaded(view.View.bufnr) then
     return
   end
   local cursor
@@ -404,7 +404,7 @@ function M.draw()
 end
 
 function M.render_hl(bufnr)
-  if not api.nvim_buf_is_loaded(bufnr) then return end
+  if not bufnr or not api.nvim_buf_is_loaded(bufnr) then return end
   api.nvim_buf_clear_namespace(bufnr, namespace_id, 0, -1)
   for _, data in ipairs(hl) do
     api.nvim_buf_add_highlight(bufnr, namespace_id, data[1], data[2], data[3], data[4])