إنشاء نسخة احتياطية من ملف

import argparse
import shutil
from datetime import datetime
from pathlib import Path


def backup_name(source: Path) -> str:
    timestamp = datetime.now().strftime("%Y%m%d_%H%M%S")
    return f"{source.stem}_{timestamp}{source.suffix}"


def create_backup(source: Path, backup_dir: Path | None = None) -> Path:
    if not source.is_file():
        raise FileNotFoundError(f"Not a file: {source}")

    target_dir = backup_dir or source.parent
    target_dir.mkdir(parents=True, exist_ok=True)
    target = target_dir / backup_name(source)
    shutil.copy2(source, target)
    return target


def main() -> None:
    parser = argparse.ArgumentParser(description="Copy a file with a timestamp suffix.")
    parser.add_argument("file", type=Path)
    parser.add_argument("--dest", type=Path, help="Folder for the backup copy.")
    args = parser.parse_args()

    backup = create_backup(args.file, args.dest)
    print(f"Backup created: {backup}")


if __name__ == "__main__":
    main()