#!/usr/bin/env python3
import pathlib
import sys
import bpy

ARMATURE_NAME = "WebGapArmatureSelectMoreArmature"
OBJECT_NAME = "WebGapArmatureSelectMoreObject"
ROOT_BONE = "WebGapArmatureSelectMoreRoot"
CHILD_BONE = "WebGapArmatureSelectMoreChild"
GRANDCHILD_BONE = "WebGapArmatureSelectMoreGrandchild"
OTHER_BONE = "WebGapArmatureSelectMoreOther"

def main():
    args = sys.argv[sys.argv.index("--") + 1:]
    if len(args) != 1:
        raise SystemExit("usage: blender -b --factory-startup --python M16-GAP-00256.py -- OUTPUT")
    bpy.ops.wm.read_factory_settings(use_empty=True)
    armature = bpy.data.armatures.new(ARMATURE_NAME)
    obj = bpy.data.objects.new(OBJECT_NAME, armature)
    bpy.context.scene.collection.objects.link(obj)
    bpy.context.view_layer.objects.active = obj
    obj.select_set(True)
    bpy.ops.object.mode_set(mode="EDIT")
    root = armature.edit_bones.new(ROOT_BONE); root.head = (0, 0, 0); root.tail = (0, 1, 0)
    child = armature.edit_bones.new(CHILD_BONE); child.head = (0, 1, 0); child.tail = (0, 2, 0); child.parent = root; child.use_connect = True
    grandchild = armature.edit_bones.new(GRANDCHILD_BONE); grandchild.head = (0, 2, 0); grandchild.tail = (0, 3, 0); grandchild.parent = child; grandchild.use_connect = True
    other = armature.edit_bones.new(OTHER_BONE); other.head = (2, 0, 0); other.tail = (2, 1, 0)
    root.select = True; root.select_head = True; root.select_tail = True
    for bone in (child, grandchild, other):
        bone.select = False; bone.select_head = False; bone.select_tail = False
    armature.edit_bones.active = root
    bpy.ops.object.mode_set(mode="OBJECT")
    bpy.ops.wm.save_as_mainfile(filepath=str(pathlib.Path(args[0]).resolve()), check_existing=False, compress=True)

if __name__ == "__main__":
    main()