#!/usr/bin/env python3
import pathlib, sys, bpy
LIBRARY_NAME="WebGapCatalogUndo.blend"; OBJECT_NAME="WebGapCatalogUndoObject"
def main():
    args=sys.argv[sys.argv.index("--")+1:]
    if len(args)!=1: raise SystemExit("usage")
    output=pathlib.Path(args[0]).resolve(); source=output.with_name(LIBRARY_NAME); bpy.ops.wm.read_factory_settings(use_empty=True)
    mesh=bpy.data.meshes.new("WebGapCatalogUndoMesh"); mesh.from_pydata([(-1,0,0),(1,0,0),(0,1,0)],[],[(0,1,2)]); obj=bpy.data.objects.new(OBJECT_NAME,mesh); bpy.context.scene.collection.objects.link(obj); bpy.ops.wm.save_as_mainfile(filepath=str(source),check_existing=False,compress=True); bpy.ops.wm.read_factory_settings(use_empty=True)
    with bpy.data.libraries.load(str(source),link=True) as (data_from,data_to): data_to.objects=[OBJECT_NAME]
    bpy.context.scene.collection.objects.link(data_to.objects[0]); bpy.ops.wm.save_as_mainfile(filepath=str(output),check_existing=False,compress=True)
if __name__=="__main__": main()