217 lines
6.9 KiB
Python
217 lines
6.9 KiB
Python
"""
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节点加载器
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负责自动加载内置节点和自定义节点
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支持函数节点加载
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"""
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import importlib
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import sys
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import json
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from pathlib import Path
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from typing import Dict, Any
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from ..core.user_manager import CLOUD_ROOT
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from ..core.cache_manager import CacheManager
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def load_builtin_nodes() -> Dict[str, Any]:
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"""
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加载内置节点
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Returns:
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加载结果统计
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"""
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from .node_registry import NodeRegistry
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# 确保项目根目录在 sys.path 中,便于按包名导入
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project_root = Path(__file__).resolve().parents[2]
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if str(project_root) not in sys.path:
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sys.path.insert(0, str(project_root))
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# 获取节点模块目录
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nodes_dir = Path(__file__).parent.parent / "nodes"
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custom_nodes_dir = CLOUD_ROOT / "custom_nodes"
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# 要加载的模块列表
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ignore_node_modules = [
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"example_nodes",
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"advanced_example_nodes",
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]
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loaded = 0
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failed = 0
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errors = []
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import importlib.util
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import types
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for module_path in nodes_dir.glob("*.py"):
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module_name = module_path.stem
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if module_name in ignore_node_modules:
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continue
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try:
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# 使用文件路径导入模块,更稳健于不同运行上下文(容器、打包后的 dist 等)
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spec = importlib.util.spec_from_file_location(f"server.app.nodes.{module_name}", str(module_path))
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if spec is None or spec.loader is None:
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raise ImportError(f"无法为 {module_name} 创建模块规范")
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module = importlib.util.module_from_spec(spec)
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# 支持热重载:若模块已在 sys.modules 中,先移除再加载
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if module.__name__ in sys.modules:
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del sys.modules[module.__name__]
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spec.loader.exec_module(module)
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# 将模块放入 sys.modules,允许其它地方按包名引用(如果需要)
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sys.modules[module.__name__] = module
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loaded += 1
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print(f"📦 加载节点模块: {module_name}")
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except Exception as e:
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failed += 1
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# 输出更详细的异常堆栈信息,便于诊断
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import traceback
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tb = traceback.format_exc()
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error_msg = f"❌ 加载失败: {module_name} - {str(e)}\n{tb}"
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errors.append(error_msg)
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print(error_msg)
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# todo: 加载 custom_nodes 目录下的用户自定义节点模块,如果有的话
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if custom_nodes_dir.exists():
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# `custom_nodes.<name>` 导入;不需要在磁盘上创建 package 文件。
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if 'custom_nodes' not in sys.modules:
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cn_pkg = types.ModuleType('custom_nodes')
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cn_pkg.__path__ = [str(custom_nodes_dir)]
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sys.modules['custom_nodes'] = cn_pkg
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for module_path in custom_nodes_dir.glob("*.py"):
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module_name = module_path.stem
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try:
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# 使用文件路径导入自定义节点,模块名使用 custom_nodes.<module_name>
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spec = importlib.util.spec_from_file_location(f"custom_nodes.{module_name}", str(module_path))
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if spec is None or spec.loader is None:
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raise ImportError(f"无法为自定义节点 {module_name} 创建模块规范")
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module = importlib.util.module_from_spec(spec)
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if module.__name__ in sys.modules:
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del sys.modules[module.__name__]
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spec.loader.exec_module(module)
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# 注册为 custom_nodes.<name>
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sys.modules[module.__name__] = module
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# 兼容性:如果现有代码仍然尝试以 cloud.custom_nodes.<name> 导入,
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# 可以在此处创建别名(可选)。当前不创建 cloud 别名以遵循你的要求。
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loaded += 1
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print(f"📦 加载自定义节点模块: {module_name}")
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except Exception as e:
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failed += 1
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import traceback
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tb = traceback.format_exc()
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error_msg = f"❌ 加载自定义节点失败: {module_name} - {str(e)}\n{tb}"
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errors.append(error_msg)
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print(error_msg)
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# 获取注册统计
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stats = NodeRegistry.get_stats()
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return {
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"modules_loaded": loaded,
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"modules_failed": failed,
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"nodes_registered": stats["total"],
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"categories": stats["categories"],
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"errors": errors
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}
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def load_custom_nodes() -> Dict[str, Any]:
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"""
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加载自定义节点
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Returns:
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加载结果统计
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"""
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# TODO: 实现自定义节点加载逻辑
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return {
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"loaded": 0,
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"failed": 0,
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"errors": []
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}
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def load_function_nodes() -> Dict[str, Any]:
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"""
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加载函数节点(从 functions 目录)
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Returns:
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加载结果统计
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"""
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from .node_registry import NodeRegistry
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from .function_nodes import create_function_node_class
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# 获取 functions 目录
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project_root = Path(__file__).resolve().parents[3]
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functions_dir = project_root / "cloud" / "custom_nodes" / "functions"
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if not functions_dir.exists():
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return {
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"loaded": 0,
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"failed": 0,
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"errors": ["functions 目录不存在"]
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}
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loaded = 0
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failed = 0
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errors = []
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# 遍历所有 .json 文件
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for json_file in functions_dir.glob("*.json"):
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try:
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# 读取函数定义
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with open(json_file, 'r', encoding='utf-8') as f:
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workflow_data = json.load(f)
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function_name = workflow_data.get("function_name", json_file.stem)
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# 创建函数节点类
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node_class = create_function_node_class(function_name, workflow_data)
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# 注册到节点注册表
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NodeRegistry.register(node_class)
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loaded += 1
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print(f"📦 加载函数节点: {function_name}")
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except Exception as e:
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failed += 1
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error_msg = f"❌ 加载函数失败: {json_file.name} - {str(e)}"
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errors.append(error_msg)
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print(error_msg)
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return {
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"loaded": loaded,
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"failed": failed,
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"errors": errors
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}
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def reload_custom_nodes() -> Dict[str, Any]:
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"""
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重新加载所有节点(包括内置和自定义)
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Returns:
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加载结果统计
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"""
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from .node_registry import NodeRegistry
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# 清空注册表
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NodeRegistry.clear()
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# 加载内置节点
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builtin_result = load_builtin_nodes()
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# 加载自定义节点
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custom_result = load_custom_nodes()
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total = builtin_result["nodes_registered"] + custom_result["loaded"]
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return {
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"total": total,
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"loaded": total,
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"builtin": builtin_result,
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"custom": custom_result
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}
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