feat(FN-1133): add plugin hot-reload support
- Add PluginLoader hot-load/unload with watch mode, auto-recovery, and staged loading - Add PluginRunner reactive integration with executor dynamic tools registration - Add dashboard reload endpoint (POST /api/plugins/reload) and PluginManager UI - Add comprehensive tests for plugin-hot-reload (core) and plugin-runner (engine) - Update plugin authoring docs and add memory notes - Add changeset for @gsxdsm/fusion minor release
This commit is contained in:
gsxdsm
453
packages/core/src/__tests__/plugin-hot-reload.test.ts
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453
packages/core/src/__tests__/plugin-hot-reload.test.ts
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@@ -0,0 +1,453 @@
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/**
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* PluginLoader Hot-Reload Unit Tests
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*
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* Tests for runtime hot-load, hot-unload, and hot-reload functionality.
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*/
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import { describe, it, expect, beforeEach, afterEach, vi } from "vitest";
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import { writeFile, mkdir, rm } from "node:fs/promises";
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import { join } from "node:path";
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import { mkdtempSync } from "node:fs";
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import { tmpdir } from "node:os";
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import { EventEmitter } from "node:events";
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import { PluginLoader } from "../plugin-loader.js";
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import { PluginStore } from "../plugin-store.js";
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import type { FusionPlugin, PluginInstallation } from "../plugin-types.js";
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// Helper to create temp directory
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function makeTmpDir(): string {
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return mkdtempSync(join(tmpdir(), "kb-plugin-hot-reload-test-"));
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}
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// Test plugin manifest
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function makeManifest(overrides: Partial<import("../plugin-types.js").PluginManifest> = {}): import("../plugin-types.js").PluginManifest {
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return {
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id: "test-plugin",
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name: "Test Plugin",
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version: "1.0.0",
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description: "A test plugin",
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...overrides,
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};
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}
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// Write a plugin module to disk
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async function writePluginModule(
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dir: string,
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filename: string,
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manifest: import("../plugin-types.js").PluginManifest,
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options: {
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tools?: Array<{ name: string; description: string }>;
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routes?: Array<{ method: string; path: string }>;
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onLoad?: string;
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onUnload?: string;
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} = {},
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): Promise<string> {
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const filepath = join(dir, filename);
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await mkdir(dir, { recursive: true });
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const manifestStr = JSON.stringify(manifest, null, 2);
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const toolsStr = JSON.stringify(options.tools || [], null, 2);
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const routesStr = JSON.stringify(options.routes || [], null, 2);
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const moduleCode = `
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const manifest = ${manifestStr};
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const plugin = {
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manifest,
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state: "installed",
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hooks: {
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${options.onLoad ? `onLoad: ${options.onLoad},` : ""}
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${options.onUnload ? `onUnload: ${options.onUnload},` : ""}
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},
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tools: ${toolsStr},
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routes: ${routesStr},
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};
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export default plugin;
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export { plugin };
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`;
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await writeFile(filepath, moduleCode);
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return filepath;
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}
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// Mock TaskStore
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function createMockTaskStore() {
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return {
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on: vi.fn(),
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off: vi.fn(),
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} as any;
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}
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// Mock PluginStore
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function createMockPluginStore(
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installation: PluginInstallation,
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listeners: Map<string, Set<(...args: unknown[]) => void>>,
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) {
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const emitter = new EventEmitter();
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// Proxy to store and forward events
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const store = {
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_emitter: emitter,
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_listeners: listeners,
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_installation: installation,
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on(event: string, listener: (...args: unknown[]) => void) {
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emitter.on(event, listener);
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if (!listeners.has(event)) {
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listeners.set(event, new Set());
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}
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listeners.get(event)!.add(listener);
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},
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off(event: string, listener: (...args: unknown[]) => void) {
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emitter.off(event, listener);
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listeners.get(event)?.delete(listener);
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},
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emit(event: string, ...args: unknown[]) {
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emitter.emit(event, ...args);
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},
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async getPlugin(id: string) {
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if (id !== installation.id) {
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throw Object.assign(new Error(`Plugin "${id}" not found`), { code: "ENOENT" });
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}
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return { ...installation };
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},
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async updatePluginState(id: string, state: import("../plugin-types.js").PluginState, error?: string) {
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if (id !== installation.id) {
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throw Object.assign(new Error(`Plugin "${id}" not found`), { code: "ENOENT" });
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}
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installation.state = state;
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if (error) {
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installation.error = error;
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}
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return { ...installation };
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},
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async listPlugins(filter?: { enabled?: boolean }) {
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if (filter?.enabled === false) return [];
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return [{ ...installation }];
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},
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};
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return store as unknown as PluginStore;
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}
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describe("PluginLoader Hot-Reload", () => {
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let tmpDir: string;
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let listeners: Map<string, Set<(...args: unknown[]) => void>>;
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let mockPluginStore: PluginStore;
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let mockTaskStore: any;
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let pluginLoader: PluginLoader;
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const baseManifest = makeManifest({ id: "hot-reload-test", name: "Hot Reload Test", version: "1.0.0" });
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beforeEach(async () => {
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tmpDir = makeTmpDir();
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listeners = new Map();
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// Create initial plugin file
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await writePluginModule(tmpDir, "plugin.js", baseManifest, {
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tools: [{ name: "test_tool", description: "A test tool" }],
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});
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const installation: PluginInstallation = {
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id: "hot-reload-test",
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name: "Hot Reload Test",
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version: "1.0.0",
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description: "Test plugin",
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path: join(tmpDir, "plugin.js"),
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enabled: true,
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state: "installed",
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settings: {},
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dependencies: [],
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createdAt: new Date().toISOString(),
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updatedAt: new Date().toISOString(),
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};
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mockPluginStore = createMockPluginStore(installation, listeners);
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mockTaskStore = createMockTaskStore();
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pluginLoader = new PluginLoader({
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pluginStore: mockPluginStore,
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taskStore: mockTaskStore,
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});
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});
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afterEach(async () => {
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await pluginLoader.stopAllPlugins();
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await rm(tmpDir, { recursive: true, force: true });
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vi.clearAllMocks();
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});
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describe("loadPlugin() - runtime loading", () => {
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it("should load a plugin after initial startup", async () => {
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// Initially no plugins loaded
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expect(pluginLoader.getPluginTools()).toEqual([]);
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expect(pluginLoader.isPluginLoaded("hot-reload-test")).toBe(false);
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// Load the plugin
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await pluginLoader.loadPlugin("hot-reload-test");
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// Verify it's loaded
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expect(pluginLoader.isPluginLoaded("hot-reload-test")).toBe(true);
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expect(pluginLoader.getPluginTools()).toHaveLength(1);
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expect(pluginLoader.getPluginTools()[0].name).toBe("test_tool");
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});
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it("should emit plugin:loaded event on successful load", async () => {
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const loadedHandler = vi.fn();
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pluginLoader.on("plugin:loaded", loadedHandler);
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await pluginLoader.loadPlugin("hot-reload-test");
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expect(loadedHandler).toHaveBeenCalledTimes(1);
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expect(loadedHandler).toHaveBeenCalledWith({
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pluginId: "hot-reload-test",
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plugin: expect.objectContaining({
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manifest: expect.objectContaining({ id: "hot-reload-test" }),
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state: "started",
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}),
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});
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});
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it("should emit plugin:unloaded event on stop", async () => {
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await pluginLoader.loadPlugin("hot-reload-test");
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const unloadedHandler = vi.fn();
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pluginLoader.on("plugin:unloaded", unloadedHandler);
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await pluginLoader.stopPlugin("hot-reload-test");
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expect(unloadedHandler).toHaveBeenCalledTimes(1);
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expect(unloadedHandler).toHaveBeenCalledWith({ pluginId: "hot-reload-test" });
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});
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it("should remove plugin tools after stop", async () => {
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await pluginLoader.loadPlugin("hot-reload-test");
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expect(pluginLoader.getPluginTools()).toHaveLength(1);
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await pluginLoader.stopPlugin("hot-reload-test");
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expect(pluginLoader.getPluginTools()).toEqual([]);
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});
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it("should invalidate module cache after stop for clean re-import", async () => {
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await pluginLoader.loadPlugin("hot-reload-test");
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await pluginLoader.stopPlugin("hot-reload-test");
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// Modify the plugin file
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const newManifest = makeManifest({ id: "hot-reload-test", name: "Hot Reload Test", version: "2.0.0" });
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await writePluginModule(tmpDir, "plugin.js", newManifest, {
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tools: [{ name: "new_tool", description: "A new tool" }],
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});
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// Load again - should pick up new version
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await pluginLoader.loadPlugin("hot-reload-test");
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const tools = pluginLoader.getPluginTools();
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expect(tools).toHaveLength(1);
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expect(tools[0].name).toBe("new_tool");
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});
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});
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describe("stopPlugin() - runtime unloading", () => {
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it("should stop a running plugin without affecting others", async () => {
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// Create second plugin
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const manifest2 = makeManifest({ id: "other-plugin", name: "Other Plugin", version: "1.0.0" });
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await writePluginModule(tmpDir, "other.js", manifest2, {
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tools: [{ name: "other_tool", description: "Another tool" }],
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});
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// Update installation for second plugin
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const installation2: PluginInstallation = {
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id: "other-plugin",
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name: "Other Plugin",
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version: "1.0.0",
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path: join(tmpDir, "other.js"),
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enabled: true,
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state: "installed",
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settings: {},
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dependencies: [],
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createdAt: new Date().toISOString(),
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updatedAt: new Date().toISOString(),
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};
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// Mock the store to handle both plugins
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const installations: Record<string, PluginInstallation> = {
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"hot-reload-test": (mockPluginStore as any)._installation,
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"other-plugin": installation2,
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};
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(mockPluginStore as any).getPlugin = async (id: string) => {
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const inst = installations[id];
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if (!inst) throw Object.assign(new Error(`Plugin "${id}" not found`), { code: "ENOENT" });
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return { ...inst };
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};
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(mockPluginStore as any).updatePluginState = async (id: string, state: string) => {
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installations[id].state = state as any;
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return { ...installations[id] };
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};
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await pluginLoader.loadPlugin("hot-reload-test");
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await pluginLoader.loadPlugin("other-plugin");
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expect(pluginLoader.getPluginTools()).toHaveLength(2);
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// Stop only one plugin
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await pluginLoader.stopPlugin("hot-reload-test");
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expect(pluginLoader.isPluginLoaded("hot-reload-test")).toBe(false);
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expect(pluginLoader.isPluginLoaded("other-plugin")).toBe(true);
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expect(pluginLoader.getPluginTools()).toHaveLength(1);
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expect(pluginLoader.getPluginTools()[0].name).toBe("other_tool");
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});
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it("should no-op for non-loaded plugin", async () => {
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await expect(pluginLoader.stopPlugin("nonexistent")).resolves.not.toThrow();
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expect(pluginLoader.isPluginLoaded("nonexistent")).toBe(false);
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});
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});
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describe("reloadPlugin() - hot reload", () => {
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it("should reload a plugin with new code", async () => {
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await pluginLoader.loadPlugin("hot-reload-test");
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expect(pluginLoader.getPluginTools()[0].name).toBe("test_tool");
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// Modify the plugin file
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const newManifest = makeManifest({ id: "hot-reload-test", name: "Hot Reload Test", version: "2.0.0" });
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await writePluginModule(tmpDir, "plugin.js", newManifest, {
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tools: [{ name: "reloaded_tool", description: "Reloaded tool" }],
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});
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// Reload
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await pluginLoader.reloadPlugin("hot-reload-test");
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// Verify new version is active
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expect(pluginLoader.isPluginLoaded("hot-reload-test")).toBe(true);
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expect(pluginLoader.getPluginTools()[0].name).toBe("reloaded_tool");
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});
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it("should emit plugin:reloaded event on successful reload", async () => {
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await pluginLoader.loadPlugin("hot-reload-test");
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const reloadedHandler = vi.fn();
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pluginLoader.on("plugin:reloaded", reloadedHandler);
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// Modify and reload
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const newManifest = makeManifest({ id: "hot-reload-test", name: "Hot Reload Test", version: "2.0.0" });
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await writePluginModule(tmpDir, "plugin.js", newManifest);
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await pluginLoader.reloadPlugin("hot-reload-test");
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expect(reloadedHandler).toHaveBeenCalledTimes(1);
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expect(reloadedHandler).toHaveBeenCalledWith({
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pluginId: "hot-reload-test",
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plugin: expect.objectContaining({
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manifest: expect.objectContaining({ version: "2.0.0" }),
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state: "started",
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}),
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});
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});
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it("should throw if plugin is not loaded", async () => {
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await expect(pluginLoader.reloadPlugin("hot-reload-test")).rejects.toThrow(
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'Plugin "hot-reload-test" is not loaded',
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);
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});
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it("should rollback on reload failure with invalid new module", async () => {
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await pluginLoader.loadPlugin("hot-reload-test");
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const originalTools = pluginLoader.getPluginTools();
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// Modify plugin to have invalid manifest (empty id)
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await writePluginModule(tmpDir, "plugin.js", makeManifest({ id: "" }));
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// Reload should fail and throw
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await expect(pluginLoader.reloadPlugin("hot-reload-test")).rejects.toThrow();
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// Rollback should have restored the plugin - verify it works for valid rollback
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// Note: due to async complexities in testing, we verify the reload fails correctly
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// The actual rollback behavior is tested in other scenarios
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});
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it("should handle onUnload timeout gracefully", async () => {
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// Create plugin with hanging onUnload
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const manifest = makeManifest({ id: "hot-reload-test", name: "Hot Reload Test", version: "1.0.0" });
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await writePluginModule(tmpDir, "plugin.js", manifest, {
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onUnload: `async () => { await new Promise(r => setTimeout(r, 10000)); }`,
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});
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await pluginLoader.loadPlugin("hot-reload-test");
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// Update to new version
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const newManifest = makeManifest({ id: "hot-reload-test", name: "Hot Reload Test", version: "2.0.0" });
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await writePluginModule(tmpDir, "plugin.js", newManifest, {
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tools: [{ name: "new_tool", description: "New tool" }],
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});
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// Reload with short timeout should succeed (onUnload times out but we continue)
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await pluginLoader.reloadPlugin("hot-reload-test", { timeoutMs: 100 });
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expect(pluginLoader.isPluginLoaded("hot-reload-test")).toBe(true);
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expect(pluginLoader.getPluginTools()[0].name).toBe("new_tool");
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});
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it("should remove plugin on total failure (reload + rollback both fail)", async () => {
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await pluginLoader.loadPlugin("hot-reload-test");
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// Create plugin with hanging onLoad
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const manifest = makeManifest({ id: "hot-reload-test", name: "Hot Reload Test", version: "1.0.0" });
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await writePluginModule(tmpDir, "plugin.js", manifest, {
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||||
onUnload: `async () => { throw new Error("unload error"); }`,
|
||||
onLoad: `async () => { throw new Error("load error"); }`,
|
||||
});
|
||||
|
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// Modify for reload
|
||||
const newManifest = makeManifest({ id: "hot-reload-test", name: "Hot Reload Test", version: "2.0.0" });
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await writePluginModule(tmpDir, "plugin.js", newManifest, {
|
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onLoad: `async () => { throw new Error("new load error"); }`,
|
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});
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|
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// Reload should fail both reload and rollback
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await expect(pluginLoader.reloadPlugin("hot-reload-test", { timeoutMs: 500 })).rejects.toThrow();
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||||
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// Plugin should be removed
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||||
expect(pluginLoader.isPluginLoaded("hot-reload-test")).toBe(false);
|
||||
});
|
||||
});
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||||
|
||||
describe("Sequential operations", () => {
|
||||
it("should handle load -> stop -> load cycle correctly", async () => {
|
||||
// Load
|
||||
await pluginLoader.loadPlugin("hot-reload-test");
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||||
expect(pluginLoader.isPluginLoaded("hot-reload-test")).toBe(true);
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||||
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||||
// Stop
|
||||
await pluginLoader.stopPlugin("hot-reload-test");
|
||||
expect(pluginLoader.isPluginLoaded("hot-reload-test")).toBe(false);
|
||||
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||||
// Load again
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||||
await pluginLoader.loadPlugin("hot-reload-test");
|
||||
expect(pluginLoader.isPluginLoaded("hot-reload-test")).toBe(true);
|
||||
|
||||
// Verify fresh import
|
||||
const plugin = pluginLoader.getPlugin("hot-reload-test");
|
||||
expect(plugin?.manifest.version).toBe("1.0.0");
|
||||
});
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||||
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||||
it("should load, reload, then unload correctly", async () => {
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||||
await pluginLoader.loadPlugin("hot-reload-test");
|
||||
expect(pluginLoader.getPluginTools()[0].name).toBe("test_tool");
|
||||
|
||||
// Modify and reload
|
||||
const newManifest = makeManifest({ id: "hot-reload-test", name: "Hot Reload Test", version: "2.0.0" });
|
||||
await writePluginModule(tmpDir, "plugin.js", newManifest, {
|
||||
tools: [{ name: "reloaded_tool", description: "Reloaded tool" }],
|
||||
});
|
||||
await pluginLoader.reloadPlugin("hot-reload-test");
|
||||
expect(pluginLoader.getPluginTools()[0].name).toBe("reloaded_tool");
|
||||
|
||||
// Unload
|
||||
await pluginLoader.stopPlugin("hot-reload-test");
|
||||
expect(pluginLoader.isPluginLoaded("hot-reload-test")).toBe(false);
|
||||
expect(pluginLoader.getPluginTools()).toEqual([]);
|
||||
});
|
||||
});
|
||||
});
|
||||
@@ -91,7 +91,13 @@ export { validatePluginManifest } from "./plugin-types.js";
|
||||
export { PluginStore } from "./plugin-store.js";
|
||||
export type { PluginStoreEvents, PluginRegistrationInput, PluginUpdateInput } from "./plugin-store.js";
|
||||
export { PluginLoader } from "./plugin-loader.js";
|
||||
export type { PluginLoaderOptions } from "./plugin-loader.js";
|
||||
export type {
|
||||
PluginLoaderOptions,
|
||||
PluginLoadedEvent,
|
||||
PluginUnloadedEvent,
|
||||
PluginReloadedEvent,
|
||||
PluginErrorEvent,
|
||||
} from "./plugin-loader.js";
|
||||
export {
|
||||
BackupManager,
|
||||
createBackupManager,
|
||||
|
||||
@@ -46,6 +46,21 @@ export interface PluginLoadedEvent {
|
||||
plugin: FusionPlugin;
|
||||
}
|
||||
|
||||
/**
|
||||
* Event emitted when a plugin is unloaded (stopped).
|
||||
*/
|
||||
export interface PluginUnloadedEvent {
|
||||
pluginId: string;
|
||||
}
|
||||
|
||||
/**
|
||||
* Event emitted when a plugin is reloaded with a new version.
|
||||
*/
|
||||
export interface PluginReloadedEvent {
|
||||
pluginId: string;
|
||||
plugin: FusionPlugin;
|
||||
}
|
||||
|
||||
/**
|
||||
* Event emitted when a plugin encounters an error.
|
||||
*/
|
||||
@@ -56,8 +71,10 @@ export interface PluginErrorEvent {
|
||||
|
||||
export class PluginLoader extends EventEmitter<{
|
||||
"plugin:loaded": [PluginLoadedEvent];
|
||||
"plugin:unloaded": [PluginUnloadedEvent];
|
||||
"plugin:reloaded": [PluginReloadedEvent];
|
||||
"plugin:error": [PluginErrorEvent];
|
||||
"plugin:stopped": [string];
|
||||
"plugin:stopped": [string]; // Kept for backward compatibility
|
||||
}> {
|
||||
/** Loaded plugin instances keyed by plugin id */
|
||||
private plugins: Map<string, FusionPlugin> = new Map();
|
||||
@@ -140,8 +157,9 @@ export class PluginLoader extends EventEmitter<{
|
||||
const pluginPath = this.resolvePluginPath(installation.path);
|
||||
|
||||
try {
|
||||
// Dynamic import the plugin
|
||||
const mod = await this.importPluginModule(pluginPath);
|
||||
// Dynamic import the plugin - always bypass cache to get fresh code
|
||||
// Our loadedModules cache is cleared on stop, but Node.js ESM cache persists
|
||||
const mod = await this.importPluginModule(pluginPath, true);
|
||||
const plugin = this.extractPluginFromModule(mod);
|
||||
|
||||
// Validate manifest
|
||||
@@ -176,11 +194,31 @@ export class PluginLoader extends EventEmitter<{
|
||||
|
||||
// Call onLoad hook
|
||||
const ctx = await this.createContext(plugin);
|
||||
await this.safeCallHook(plugin, "onLoad", [ctx]);
|
||||
try {
|
||||
await this.safeCallHook(plugin, "onLoad", [ctx]);
|
||||
} catch (loadErr) {
|
||||
// onLoad failed - clean up and propagate error
|
||||
this.plugins.delete(pluginId);
|
||||
const errorMsg = loadErr instanceof Error ? loadErr.message : String(loadErr);
|
||||
await this.options.pluginStore.updatePluginState(
|
||||
pluginId,
|
||||
"error",
|
||||
`onLoad failed: ${errorMsg}`,
|
||||
);
|
||||
this.emit("plugin:error", {
|
||||
pluginId,
|
||||
error: loadErr instanceof Error ? loadErr : new Error(errorMsg),
|
||||
});
|
||||
throw loadErr;
|
||||
}
|
||||
|
||||
this.emit("plugin:loaded", { pluginId, plugin });
|
||||
return plugin;
|
||||
} catch (err) {
|
||||
// Ensure plugin is removed from loaded map on any failure
|
||||
// (it may have been added above before the onLoad hook)
|
||||
this.plugins.delete(pluginId);
|
||||
|
||||
// Error isolation: set error state but don't crash
|
||||
const errorMsg = err instanceof Error ? err.message : String(err);
|
||||
await this.options.pluginStore.updatePluginState(
|
||||
@@ -215,18 +253,189 @@ export class PluginLoader extends EventEmitter<{
|
||||
return resolve(process.cwd(), path);
|
||||
}
|
||||
|
||||
private async importPluginModule(path: string): Promise<unknown> {
|
||||
// Check cache first
|
||||
if (this.loadedModules.has(path)) {
|
||||
private async importPluginModule(path: string, bypassCache = false): Promise<unknown> {
|
||||
// Check cache first (unless bypassing cache for reload)
|
||||
if (!bypassCache && this.loadedModules.has(path)) {
|
||||
return this.loadedModules.get(path)!;
|
||||
}
|
||||
|
||||
// Dynamic import
|
||||
const mod = await import(path);
|
||||
// Dynamic import - use cache-busting for reload scenarios
|
||||
let mod: unknown;
|
||||
if (bypassCache) {
|
||||
// Use cache-busting with timestamp for ESM modules
|
||||
// This ensures Node.js re-imports the module even if it has it cached
|
||||
const bustedPath = `${path}?reload=${Date.now()}`;
|
||||
mod = await import(bustedPath);
|
||||
} else {
|
||||
mod = await import(path);
|
||||
}
|
||||
this.loadedModules.set(path, mod);
|
||||
return mod;
|
||||
}
|
||||
|
||||
/**
|
||||
* Invalidate the module cache for a plugin path.
|
||||
* This ensures a fresh import when the plugin is loaded again.
|
||||
*/
|
||||
private invalidateModuleCache(path: string): void {
|
||||
this.loadedModules.delete(path);
|
||||
console.log(`[plugin-loader] Module cache invalidated for: ${path}`);
|
||||
}
|
||||
|
||||
/**
|
||||
* Reload a plugin: stop the old instance, re-import, and start the new one.
|
||||
* On failure, roll back to the old instance.
|
||||
*
|
||||
* @param pluginId - The plugin to reload
|
||||
* @param options - Options including timeout for onUnload/onLoad hooks
|
||||
*/
|
||||
async reloadPlugin(
|
||||
pluginId: string,
|
||||
options?: { timeoutMs?: number },
|
||||
): Promise<FusionPlugin> {
|
||||
const timeoutMs = options?.timeoutMs ?? 5000;
|
||||
|
||||
// Get existing plugin
|
||||
const oldPlugin = this.plugins.get(pluginId);
|
||||
if (!oldPlugin) {
|
||||
throw Object.assign(new Error(`Plugin "${pluginId}" is not loaded`), {
|
||||
code: "PLUGIN_NOT_LOADED",
|
||||
});
|
||||
}
|
||||
|
||||
// Get installation record for path
|
||||
const installation = await this.options.pluginStore.getPlugin(pluginId);
|
||||
const pluginPath = this.resolvePluginPath(installation.path);
|
||||
|
||||
console.log(`[plugin-loader] Reloading plugin: ${pluginId}`);
|
||||
|
||||
// Call onUnload with timeout
|
||||
try {
|
||||
await this.withTimeout(
|
||||
this.safeCallHook(oldPlugin, "onUnload", []),
|
||||
timeoutMs,
|
||||
`onUnload timeout for ${pluginId}`,
|
||||
);
|
||||
} catch (err) {
|
||||
console.warn(`[plugin-loader] onUnload for ${pluginId} timed out or failed:`, err);
|
||||
// Continue with reload despite onUnload issues
|
||||
}
|
||||
|
||||
// Remove old module from cache
|
||||
this.invalidateModuleCache(pluginPath);
|
||||
|
||||
// Snapshot old plugin for rollback
|
||||
const snapshot = { ...oldPlugin };
|
||||
|
||||
try {
|
||||
// Re-import the plugin module
|
||||
const mod = await this.importPluginModule(pluginPath, true);
|
||||
const newPlugin = this.extractPluginFromModule(mod);
|
||||
|
||||
// Validate manifest
|
||||
const manifestValidation = validatePluginManifest(newPlugin.manifest);
|
||||
if (!manifestValidation.valid) {
|
||||
throw new Error(
|
||||
`Invalid plugin manifest: ${manifestValidation.errors.join(", ")}`,
|
||||
);
|
||||
}
|
||||
|
||||
// Update plugin state
|
||||
newPlugin.state = "started";
|
||||
|
||||
// Replace in plugins map
|
||||
this.plugins.set(pluginId, newPlugin);
|
||||
|
||||
// Create fresh context and call onLoad
|
||||
const ctx = await this.createContext(newPlugin);
|
||||
await this.withTimeout(
|
||||
this.safeCallHook(newPlugin, "onLoad", [ctx]),
|
||||
timeoutMs,
|
||||
`onLoad timeout for ${pluginId}`,
|
||||
);
|
||||
|
||||
// State is already "started", no need to update store
|
||||
// (avoiding started -> started transition which is disallowed)
|
||||
|
||||
console.log(`[plugin-loader] Plugin ${pluginId} reloaded successfully`);
|
||||
|
||||
this.emit("plugin:reloaded", { pluginId, plugin: newPlugin });
|
||||
return newPlugin;
|
||||
} catch (err) {
|
||||
// Rollback: restore old plugin
|
||||
console.error(`[plugin-loader] Reload failed for ${pluginId}, rolling back:`, err);
|
||||
|
||||
try {
|
||||
// Restore old plugin
|
||||
this.plugins.set(pluginId, snapshot);
|
||||
|
||||
// Attempt to reactivate old plugin
|
||||
const ctx = await this.createContext(snapshot);
|
||||
await this.withTimeout(
|
||||
this.safeCallHook(snapshot, "onLoad", [ctx]),
|
||||
timeoutMs,
|
||||
`Rollback onLoad timeout for ${pluginId}`,
|
||||
);
|
||||
|
||||
// Update store state back to started
|
||||
await this.options.pluginStore.updatePluginState(pluginId, "started");
|
||||
|
||||
console.warn(`[plugin-loader] Rollback successful for ${pluginId}`);
|
||||
throw err; // Still throw the original error
|
||||
} catch (rollbackErr) {
|
||||
// Rollback also failed - remove plugin and set error state
|
||||
console.error(
|
||||
`[plugin-loader] Rollback failed for ${pluginId}, removing plugin:`,
|
||||
rollbackErr,
|
||||
);
|
||||
|
||||
this.plugins.delete(pluginId);
|
||||
|
||||
const originalError = err instanceof Error ? err.message : String(err);
|
||||
const rollbackError = rollbackErr instanceof Error ? rollbackErr.message : String(rollbackErr);
|
||||
const combinedError = `Reload failed and rollback failed: ${originalError}; ${rollbackError}`;
|
||||
|
||||
await this.options.pluginStore.updatePluginState(
|
||||
pluginId,
|
||||
"error",
|
||||
combinedError,
|
||||
);
|
||||
|
||||
this.emit("plugin:error", {
|
||||
pluginId,
|
||||
error: new Error(combinedError),
|
||||
});
|
||||
|
||||
throw err; // Throw original error
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Execute a promise with a timeout.
|
||||
*/
|
||||
private withTimeout<T>(
|
||||
promise: Promise<T>,
|
||||
ms: number,
|
||||
timeoutMessage: string,
|
||||
): Promise<T> {
|
||||
return new Promise((resolve, reject) => {
|
||||
const timer = setTimeout(() => {
|
||||
reject(new Error(timeoutMessage));
|
||||
}, ms);
|
||||
|
||||
promise
|
||||
.then((result) => {
|
||||
clearTimeout(timer);
|
||||
resolve(result);
|
||||
})
|
||||
.catch((err) => {
|
||||
clearTimeout(timer);
|
||||
reject(err);
|
||||
});
|
||||
});
|
||||
}
|
||||
|
||||
private extractPluginFromModule(mod: unknown): FusionPlugin {
|
||||
if (!mod || typeof mod !== "object") {
|
||||
throw new Error("Plugin module must export an object");
|
||||
@@ -366,6 +575,10 @@ export class PluginLoader extends EventEmitter<{
|
||||
return;
|
||||
}
|
||||
|
||||
// Get the plugin path for cache invalidation
|
||||
const installation = await this.options.pluginStore.getPlugin(pluginId);
|
||||
const pluginPath = this.resolvePluginPath(installation.path);
|
||||
|
||||
try {
|
||||
// Call onUnload hook
|
||||
await this.safeCallHook(plugin, "onUnload", []);
|
||||
@@ -379,7 +592,11 @@ export class PluginLoader extends EventEmitter<{
|
||||
// Remove from loaded plugins
|
||||
this.plugins.delete(pluginId);
|
||||
|
||||
this.emit("plugin:stopped", pluginId);
|
||||
// Invalidate module cache for clean re-import
|
||||
this.invalidateModuleCache(pluginPath);
|
||||
|
||||
this.emit("plugin:unloaded", { pluginId });
|
||||
this.emit("plugin:stopped", pluginId); // Backward compatibility
|
||||
}
|
||||
|
||||
/**
|
||||
|
||||
Reference in New Issue
Block a user