feat(hooks): adds support for RuntimeHook functions. (#19598)

packages/cli/src/config/extension-manager-hydration.test.ts

@@ -9,7 +9,11 @@ import * as fs from 'node:fs';
 import * as path from 'node:path';
 import * as os from 'node:os';
 import { ExtensionManager } from './extension-manager.js';
-import { debugLogger, coreEvents } from '@google/gemini-cli-core';
+import {
+  debugLogger,
+  coreEvents,
+  type CommandHookConfig,
+} from '@google/gemini-cli-core';
 import { createTestMergedSettings } from './settings.js';
 import { createExtension } from '../test-utils/createExtension.js';
 import { EXTENSIONS_DIRECTORY_NAME } from './extensions/variables.js';
@@ -248,9 +252,11 @@ System using model: \${MODEL_NAME}
 
     expect(extension.hooks).toBeDefined();
     expect(extension.hooks?.BeforeTool).toHaveLength(1);
-    expect(extension.hooks?.BeforeTool![0].hooks[0].env?.['HOOK_CMD']).toBe(
-      'hello-world',
-    );
+    expect(
+      (extension.hooks?.BeforeTool![0].hooks[0] as CommandHookConfig).env?.[
+        'HOOK_CMD'
+      ],
+    ).toBe('hello-world');
   });
 
   it('should pick up new settings after restartExtension', async () => {

packages/cli/src/config/extension-manager.ts

@@ -52,6 +52,7 @@ import {
   applyAdminAllowlist,
   getAdminBlockedMcpServersMessage,
   CoreToolCallStatus,
+  HookType,
 } from '@google/gemini-cli-core';
 import { maybeRequestConsentOrFail } from './extensions/consent.js';
 import { resolveEnvVarsInObject } from '../utils/envVarResolver.js';
@@ -735,8 +736,10 @@ Would you like to attempt to install via "git clone" instead?`,
             if (eventHooks) {
               for (const definition of eventHooks) {
                 for (const hook of definition.hooks) {
-                  // Merge existing env with new env vars, giving extension settings precedence.
-                  hook.env = { ...hook.env, ...hookEnv };
+                  if (hook.type === HookType.Command) {
+                    // Merge existing env with new env vars, giving extension settings precedence.
+                    hook.env = { ...hook.env, ...hookEnv };
+                  }
                 }
               }
             }