backup.py

#!/usr/bin/env python3
from huggingface_hub import HfApi
import sys
import os
import shutil
import time
import glob
from datetime import datetime
import tempfile

def manage_backups(api, repo_id, max_files=10):
    """管理备份文件数量，删除旧的备份"""
    try:
        files = api.list_repo_files(repo_id=repo_id, repo_type="dataset")
        backup_files = [f for f in files if f.startswith('navidrome_backup_') and f.endswith('.tar.gz')]
        backup_files.sort()
        
        if len(backup_files) >= max_files:
            files_to_delete = backup_files[:(len(backup_files) - max_files + 1)]
            for file_to_delete in files_to_delete:
                try:
                    api.delete_file(path_in_repo=file_to_delete, repo_id=repo_id, repo_type="dataset")
                    print(f'已删除旧备份: {file_to_delete}')
                except Exception as e:
                    print(f'删除 {file_to_delete} 时出错: {str(e)}')
    except Exception as e:
        print(f'管理备份时出错: {str(e)}')

def upload_backup(file_path, file_name, token, repo_id):
    """上传备份文件到HuggingFace"""
    api = HfApi(token=token)
    try:
        api.upload_file(
            path_or_fileobj=file_path,
            path_in_repo=file_name,
            repo_id=repo_id,
            repo_type="dataset"
        )
        print(f"成功上传 {file_name}")
        
        manage_backups(api, repo_id)
    except Exception as e:
        print(f"文件上传出错: {str(e)}")

def download_latest_backup(token, repo_id, data_dir):
    """下载最新的备份文件并恢复"""
    try:
        # 确保目标目录存在并有正确权限
        os.makedirs(data_dir, exist_ok=True)
        os.chmod(data_dir, 0o755)
        
        api = HfApi(token=token)
        files = api.list_repo_files(repo_id=repo_id, repo_type="dataset")
        backup_files = [f for f in files if f.startswith('navidrome_backup_') and f.endswith('.tar.gz')]
        
        if not backup_files:
            print("未找到备份文件")
            return False
            
        latest_backup = sorted(backup_files)[-1]
        
        # 使用临时目录下载文件
        with tempfile.TemporaryDirectory() as temp_dir:
            filepath = api.hf_hub_download(
                repo_id=repo_id,
                filename=latest_backup,
                repo_type="dataset",
                local_dir=temp_dir
            )
            
            if filepath and os.path.exists(filepath):
                # 解压备份文件
                import tarfile
                with tarfile.open(filepath, "r:gz") as tar:
                    tar.extractall(path=data_dir)
                    
                print(f"成功从 {latest_backup} 恢复备份到 {data_dir}")
                return True
        return False
                
    except Exception as e:
        print(f"下载备份时出错: {str(e)}")
        return False

def create_backup(data_dir, exclude_dirs=None):
    """创建备份文件，排除指定目录"""
    if exclude_dirs is None:
        exclude_dirs = []
    
    timestamp = datetime.now().strftime("%Y%m%d_%H%M%S")
    backup_filename = f"navidrome_backup_{timestamp}.tar.gz"
    backup_path = f"/tmp/{backup_filename}"
    
    try:
        import tarfile
        with tarfile.open(backup_path, "w:gz") as tar:
            for item in os.listdir(data_dir):
                item_path = os.path.join(data_dir, item)
                # 排除指定目录
                if os.path.isdir(item_path) and item in exclude_dirs:
                    continue
                tar.add(item_path, arcname=item)
        
        print(f"备份文件创建成功: {backup_path}")
        return backup_path, backup_filename
    except Exception as e:
        print(f"创建备份时出错: {str(e)}")
        return None, None

if __name__ == "__main__":
    action = sys.argv[1]
    token = sys.argv[2]
    repo_id = sys.argv[3]
    data_dir = sys.argv[4]
    
    if action == "upload":
        # 排除音乐目录和缓存，只备份数据和配置
        exclude_dirs = ["cache", "music"]
        backup_path, backup_filename = create_backup(data_dir, exclude_dirs)
        if backup_path:
            upload_backup(backup_path, backup_filename, token, repo_id)
            # 清理临时文件
            os.remove(backup_path)
    elif action == "download":
        download_latest_backup(token, repo_id, data_dir)