fix: don't generate final navbar on file import

netbox/netbox/navigation/menu.py

@@ -1,6 +1,5 @@
 from django.utils.translation import gettext_lazy as _
 
-from netbox.registry import registry
 from . import *
 
 #
@@ -464,13 +463,27 @@ MENUS = [
     OPERATIONS_MENU,
 ]
 
-# Add top-level plugin menus
+has_initialized_function_menus = False
+
+
+def add_plugin_menus():
+    """
+    Build the plugin navigation menu and add plugin defined
+    menus to the global context.
+    """
+
+    global has_initialized_function_menus
+    if has_initialized_function_menus:
+        return
+    else:
+        has_initialized_function_menus = True
+
+    from netbox.registry import registry
+
     for menu in registry['plugins']['menus']:
         MENUS.append(menu)
 
-# Add the default "plugins" menu
     if registry['plugins']['menu_items']:
-
         # Build the default plugins menu
         groups = [
             MenuGroup(label=label, items=items)

netbox/utilities/templatetags/navigation.py

@@ -1,7 +1,7 @@
 from django import template
 from django.utils.safestring import mark_safe
 
-from netbox.navigation.menu import MENUS
+from netbox.navigation.menu import MENUS, add_plugin_menus
 
 __all__ = (
     'nav',
@@ -14,6 +14,8 @@ register = template.Library()
 
 @register.inclusion_tag("navigation/menu.html", takes_context=True)
 def nav(context):
+    add_plugin_menus()
+
     """
     Render the navigation menu.
     """