Add clearLoadedPlugin function for NAPI integration

- Add clearLoadedPlugin() JS function in src-js/plugins/load.ts to clear registeredRules and registeredPluginPaths
- Export clearLoadedPlugin from src-js/plugins/index.ts and src-js/index.ts
- Add tests for clearLoadedPlugin functionality
- Function will be used by language server to reset plugin state

Co-authored-by: Sysix <[email protected]>

Author: Copilot

apps/oxlint/src-js/index.ts

@@ -274,3 +274,19 @@ function createContextAndVisitor(rule: CreateOnceRule): {
 
   return { context, visitor, beforeHook };
 }
+
+/**
+ * Clear all loaded plugins and rules.
+ * 
+ * This function clears the internal state of registered plugins and rules,
+ * allowing plugins to be reloaded from scratch. This is useful for the
+ * language server when restarting or reloading configuration.
+ * 
+ * Note: This function is lazy-loaded and will only be available after
+ * the first plugin has been loaded. It will not have any effect if no
+ * plugins have been loaded yet.
+ */
+export async function clearLoadedPlugin(): Promise<void> {
+  const mod = await import('./plugins/index.js');
+  mod.clearLoadedPlugin();
+}

apps/oxlint/src-js/plugins/index.ts

@@ -1,4 +1,4 @@
 import { lintFile } from './lint.js';
-import { loadPlugin } from './load.js';
+import { clearLoadedPlugin, loadPlugin } from './load.js';
 
-export { lintFile, loadPlugin };
+export { clearLoadedPlugin, lintFile, loadPlugin };

apps/oxlint/src-js/plugins/load.ts

@@ -271,3 +271,15 @@ function conformHookFn<H>(hookFn: H | null | undefined, hookName: string): H | n
   if (typeof hookFn !== 'function') throw new TypeError(`\`${hookName}\` hook must be a function if provided`);
   return hookFn;
 }
+
+/**
+ * Clear all loaded plugins and rules.
+ * 
+ * This function clears the internal state of registered plugins and rules,
+ * allowing plugins to be reloaded from scratch. This is useful for the
+ * language server when restarting or reloading configuration.
+ */
+export function clearLoadedPlugin(): void {
+  registeredPluginPaths.clear();
+  registeredRules.length = 0;
+}

apps/oxlint/src/run.rs

@@ -52,6 +52,8 @@ pub type JsLintFileCb = ThreadsafeFunction<
     false,
 >;
 
+
+
 /// NAPI entry point.
 ///
 /// JS side passes in:

apps/oxlint/test/clear-loaded-plugin.test.ts

@@ -0,0 +1,24 @@
+import { describe, it, expect } from 'vitest';
+import { clearLoadedPlugin } from '../dist/index.js';
+
+/**
+ * Test the clearLoadedPlugin function
+ */
+describe('clearLoadedPlugin', () => {
+  it('should be exported from the main module', () => {
+    expect(clearLoadedPlugin).toBeDefined();
+    expect(typeof clearLoadedPlugin).toBe('function');
+  });
+
+  it('should execute without errors', async () => {
+    // Call the clear function - it should not throw
+    await expect(clearLoadedPlugin()).resolves.toBeUndefined();
+  });
+
+  it('should work when called multiple times', async () => {
+    // Call it multiple times to ensure it doesn't error
+    await expect(clearLoadedPlugin()).resolves.toBeUndefined();
+    await expect(clearLoadedPlugin()).resolves.toBeUndefined();
+    await expect(clearLoadedPlugin()).resolves.toBeUndefined();
+  });
+});