fix(watcher): only purge on subsequent setup calls, add git_purge log

lua/nvim-tree.lua

@@ -794,20 +794,19 @@ function M.setup(conf)
   end
 
   setup_autocommands(opts)
-  require("nvim-tree.watcher").purge_watchers()
 
   if not M.setup_called then
+    -- first call to setup
     setup_vim_commands()
-  end
-
-  if M.setup_called then
+  else
+    -- subsequent calls to setup
+    require("nvim-tree.watcher").purge_watchers()
     view.close_all_tabs()
     view.abandon_all_windows()
-  end
-
-  if M.setup_called and core.get_explorer() ~= nil then
-    git.purge_state()
-    TreeExplorer = nil
+    if core.get_explorer() ~= nil then
+      git.purge_state()
+      TreeExplorer = nil
+    end
   end
 
   M.setup_called = true

lua/nvim-tree/git/init.lua

@@ -173,6 +173,7 @@ function M.load_project_status(cwd)
 end
 
 function M.purge_state()
+  log.line("git", "purge_state")
   M.projects = {}
   M.cwd_to_project_root = {}
 end