"""统一 UTF-8 读取迁移配置，Windows 默认 GBK 时也不必手工更改系统编码。"""
import argparse
import configparser
from pathlib import Path
import sys
root = Path(__file__).resolve().parents[1]
sys.path.insert(0, str(root))
from alembic import command
from alembic.config import Config

if __name__ == '__main__':
    parser = argparse.ArgumentParser(description='执行已交付迁移，不生成或猜测新结构')
    parser.add_argument('operation', choices=['upgrade', 'current'], default='upgrade', nargs='?')
    args = parser.parse_args()
    source = configparser.ConfigParser(defaults={'here': str(root)})
    source.read(root / 'alembic.ini', encoding='utf-8')
    configuration = Config()
    for key, value in source.items('alembic'):
        if key != 'here':
            configuration.set_main_option(key, value.replace('%', '%%'))
    if args.operation == 'upgrade':
        command.upgrade(configuration, 'head')
    else:
        command.current(configuration)