import sys
import bpy

bpy.ops.wm.read_factory_settings(use_empty=True)
bpy.ops.import_scene.gltf(filepath=sys.argv[sys.argv.index("--") + 1])
for obj in bpy.context.scene.objects:
    if obj.type == 'ARMATURE':
        for b in sorted(obj.data.bones, key=lambda x: x.name):
            print("BONE: " + b.name)
        break