mirror of
https://github.com/johndoe6345789/metabuilder.git
synced 2026-04-25 06:14:59 +00:00
johndoe6345789
3d6ae4cbf7
Add full Python workflow execution engine with: Core Executor: - engine.py: WorkflowEngine for running n8n configs - n8n_executor.py: N8N-style workflow execution with connections - node_executor.py: Individual node execution with plugin dispatch - loop_executor.py: Loop node execution with iteration control - execution_order.py: Topological sort for node ordering Schema & Validation: - n8n_schema.py: N8N workflow schema types and validation - n8n_converter.py: Legacy to n8n schema conversion Plugin System: - plugin_loader.py: Dynamic plugin loading - plugin_registry.py: Plugin discovery and registration - plugin_map.json: 116 plugin type mappings Runtime & Context: - runtime.py: Workflow runtime container - input_resolver.py: Binding and coercion resolution - value_helpers.py: Value normalization helpers - workflow_context_builder.py: Runtime context assembly - workflow_config_loader.py: Configuration loading - workflow_engine_builder.py: Engine assembly with dependencies Utilities: - tool_calls_handler.py: LLM tool call handling - tool_runner.py: Tool execution with logging - notification_helpers.py: Slack/Discord notifications - workflow_adapter.py: N8N format handling - workflow_graph.py: Node/edge graph for visualization Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
111 lines
4.2 KiB
Python
111 lines
4.2 KiB
Python
"""Workflow plugin registry with automatic plugin discovery."""
|
|
import json
|
|
import logging
|
|
import os
|
|
from pathlib import Path
|
|
from .plugin_loader import load_plugin_callable
|
|
|
|
logger = logging.getLogger("autometabuilder")
|
|
|
|
|
|
def scan_plugins() -> dict:
|
|
"""
|
|
Automatically scan and discover workflow plugins.
|
|
|
|
Scans the plugins directory and subdirectories, looking for package.json files
|
|
that define plugins. Returns a map of plugin_name -> callable_path.
|
|
|
|
Plugin structure:
|
|
- Each plugin is in its own directory with a package.json file
|
|
- Plugin name can be in "metadata.plugin_type" (preferred) or "name" field
|
|
- package.json must have a "main" field pointing to the Python file
|
|
- The Python file must have a "run" function
|
|
"""
|
|
plugin_map = {}
|
|
plugins_base = Path(__file__).parent / "plugins"
|
|
|
|
if not plugins_base.exists():
|
|
logger.warning("Plugins directory not found: %s", plugins_base)
|
|
return plugin_map
|
|
|
|
# Scan all subdirectories for package.json files
|
|
for package_json_path in plugins_base.rglob("package.json"):
|
|
try:
|
|
# Read package.json
|
|
with open(package_json_path, "r", encoding="utf-8") as f:
|
|
package_data = json.load(f)
|
|
|
|
# Try metadata.plugin_type first (preferred), then fall back to name
|
|
metadata = package_data.get("metadata", {})
|
|
plugin_name = metadata.get("plugin_type") or package_data.get("name")
|
|
main_file = package_data.get("main")
|
|
|
|
if not plugin_name or not main_file:
|
|
logger.debug("Skipping %s: missing 'plugin_type'/'name' or 'main' field", package_json_path)
|
|
continue
|
|
|
|
# Build the Python module path
|
|
plugin_dir = package_json_path.parent
|
|
main_file_stem = Path(main_file).stem # Remove .py extension
|
|
|
|
# Calculate relative path from plugins directory
|
|
rel_path = plugin_dir.relative_to(plugins_base)
|
|
|
|
# Build module path: autometabuilder.workflow.plugins.<category>.<plugin_dir>.<main_file>.run
|
|
parts = ["autometabuilder", "workflow", "plugins"] + list(rel_path.parts) + [main_file_stem, "run"]
|
|
callable_path = ".".join(parts)
|
|
|
|
plugin_map[plugin_name] = callable_path
|
|
logger.debug("Discovered plugin %s -> %s", plugin_name, callable_path)
|
|
|
|
except json.JSONDecodeError:
|
|
logger.warning("Invalid JSON in %s", package_json_path)
|
|
except Exception as error: # pylint: disable=broad-exception-caught
|
|
logger.debug("Error scanning %s: %s", package_json_path, error)
|
|
|
|
logger.info("Discovered %d plugins via scanning", len(plugin_map))
|
|
return plugin_map
|
|
|
|
|
|
def load_plugin_map() -> dict:
|
|
"""
|
|
Load workflow plugin map.
|
|
|
|
This function now uses automatic plugin discovery by scanning the plugins
|
|
directory instead of reading from a static plugin_map.json file.
|
|
|
|
Falls back to plugin_map.json if it exists (for backwards compatibility).
|
|
"""
|
|
# Try scanning first
|
|
plugin_map = scan_plugins()
|
|
|
|
# If no plugins found, try legacy plugin_map.json as fallback
|
|
if not plugin_map:
|
|
map_path = os.path.join(os.path.dirname(__file__), "plugin_map.json")
|
|
if os.path.exists(map_path):
|
|
logger.info("Using legacy plugin_map.json")
|
|
try:
|
|
with open(map_path, "r", encoding="utf-8") as f:
|
|
data = json.load(f)
|
|
plugin_map = data if isinstance(data, dict) else {}
|
|
except json.JSONDecodeError:
|
|
logger.error("Invalid workflow plugin map JSON.")
|
|
|
|
return plugin_map
|
|
|
|
|
|
class PluginRegistry:
|
|
"""Resolve workflow plugin handlers."""
|
|
def __init__(self, plugin_map: dict):
|
|
self._plugins = {}
|
|
for node_type, path in plugin_map.items():
|
|
try:
|
|
self._plugins[node_type] = load_plugin_callable(path)
|
|
logger.debug("Registered workflow plugin %s -> %s", node_type, path)
|
|
except Exception as error: # pylint: disable=broad-exception-caught
|
|
logger.error("Failed to register plugin %s: %s", node_type, error)
|
|
|
|
def get(self, node_type: str):
|
|
"""Return plugin handler for node type."""
|
|
return self._plugins.get(node_type)
|