import subprocess
from datetime import datetime


def gen_build_info():
    hash_str = subprocess.check_output(['git', 'rev-parse', '--short', 'HEAD']).decode('utf-8').strip()
    with open('build_info.py', 'w', encoding='utf-8') as f:
        f.write(f"# Auto-generated build info\n")
        f.write(f"BUILD_TIME = '{datetime.now().isoformat(sep=' ', timespec='seconds')}'\n")
        f.write(f"GIT_HASH = '{hash_str}'\n")


gen_build_info()