Tool script for Godot 4.0.dev which renames a bone or a blendshape.

rename_node_or_blendshape.gd

@tool
extends EditorPlugin

func _enter_tree():
	add_tool_menu_item("Rename bone or blendshape", self, "callback")
	# add_import_plugin(import_plugin)

func callback(ud): 
	var nodes:Array = get_editor_interface().get_selection().get_selected_nodes()
	for node in nodes:
		if node is MeshInstance3D:
			var nodem:MeshInstance3D = node
			var nm:ArrayMesh = nodem.mesh as ArrayMesh
			var mynm:ArrayMesh = nm # Workaround script bug
			if nm is ArrayMesh:
				if nm.get_blend_shape_count() == 0:
					print("No blend shapes found yet! Added a sample one.")
					var sa:Array = nm.surface_get_arrays(0)
					var pt = nm.surface_get_primitive_type(0)
					nm.clear_surfaces()
					nm.add_blend_shape("Test " + str(nm.get_blend_shape_count()))
					nm.add_surface_from_arrays(pt, sa)
				var bsn = mynm.get_blend_shape_name(0)
				print("Old blend shape name 0 " + bsn)
				nm.set_blend_shape_name(0, str(OS.get_datetime()))
				print("Blend shape changed from " + bsn + " to " + mynm.get_blend_shape_name(0))
		elif node is Skeleton3D:
			var skel:Skeleton3D = node
			var skelx:Skeleton3D = node # Avoid infinite loop due to GDScript bugs
			var bn:String = skel.get_bone_name(0)
			print("Old bone name 0 " + bn)
			skel.set_bone_name(0, str(OS.get_datetime()))
			print("Bone name changed from " + bn + " to " + skelx.get_bone_name(0))
			# Causes infinite loop???
			# print("Bone name changed from " + bn + " to " + skel.get_bone_name(0))

func _exit_tree():
	remove_tool_menu_item("Rename bone or blendshape")