chore: migrate to classic (#2991)

* add classic, migrating nodes classes

* add mixins to classic

* typechecked optargs constructors for nodes

* typechecked optargs constructors for watcher and event

* luacheck

* typechecked optargs constructors for GitRunner

* typechecked optargs constructors for Sorter

* typechecked optargs constructors for decorators, WIP

* typechecked optargs constructors for decorators, WIP

* typechecked optargs constructors for decorators

* remove class

* replace enums with named maps

* Renderer and Builder use classic, tidy opts

* LiveFilter uses classic, tidy opts

* Filter uses classic, tidy opts

* add FilterTypes named map

* move toggles into filters

* Marks uses classic, tidy opts

* Sorter uses classic, tidy opts

* Clipboard uses classic, tidy opts

* use supers for node methods

* HighlightDisplay uses classic

* protected :new

* Watcher tidy

* Revert "use supers for node methods"

This reverts commit 9fc7a866ec.

* Watcher tidy

* format

* format

* Filters private methods

* format

* Sorter type safety

* Sorter type safety

* Sorter type safety

* Sorter type safety

* Sorter type safety

* Sorter type safety

* tidy Runner

* tidy hi-test name

lua/nvim-tree/core.lua

@@ -1,4 +1,5 @@
 local events = require("nvim-tree.events")
+local notify = require("nvim-tree.notify")
 local view = require("nvim-tree.view")
 local log = require("nvim-tree.log")
 
@@ -15,7 +16,21 @@ function M.init(foldername)
   if TreeExplorer then
     TreeExplorer:destroy()
   end
-  TreeExplorer = require("nvim-tree.explorer"):create(foldername)
+
+  local err, path
+
+  if foldername then
+    path, err = vim.loop.fs_realpath(foldername)
+  else
+    path, err = vim.loop.cwd()
+  end
+  if path then
+    TreeExplorer = require("nvim-tree.explorer")({ path = path })
+  else
+    notify.error(err)
+    TreeExplorer = nil
+  end
+
   if not first_init_done then
     events._dispatch_ready()
     first_init_done = true