2 files changed, 26 insertions, 30 deletions
diff --git a/packages/core/src/utils/user_id.test.ts b/packages/core/src/utils/user_id.test.ts
index 185d6c95..42d8958c 100644
--- a/packages/core/src/utils/user_id.test.ts
+++ b/packages/core/src/utils/user_id.test.ts
@@ -5,7 +5,7 @@
  */
 
 import { describe, it, expect } from 'vitest';
-import { getInstallationId, getGoogleAccountId } from './user_id.js';
+import { getInstallationId, getGoogleAccountEmail } from './user_id.js';
 
 describe('user_id', () => {
   describe('getInstallationId', () => {
@@ -22,30 +22,24 @@ describe('user_id', () => {
     });
   });
 
-  describe('getGoogleAccountId', () => {
-    it('should return a non-empty string', async () => {
-      const result = await getGoogleAccountId();
+  describe('getGoogleAccountEmail', () => {
+    it('should return a non-empty string', () => {
+      const result = getGoogleAccountEmail();
 
       expect(result).toBeDefined();
       expect(typeof result).toBe('string');
 
       // Should be consistent on subsequent calls
-      const secondCall = await getGoogleAccountId();
+      const secondCall = getGoogleAccountEmail();
       expect(secondCall).toBe(result);
     });
 
-    it('should return empty string when no Google Account ID is cached, or a valid ID when cached', async () => {
-      // The function can return either an empty string (if no cached ID) or a valid Google Account ID (if cached)
-      const googleAccountIdResult = await getGoogleAccountId();
+    it('should return empty string when no Google Account email is cached', () => {
+      // In a clean test environment, there should be no cached Google Account email
+      const googleAccountEmailResult = getGoogleAccountEmail();
 
-      expect(googleAccountIdResult).toBeDefined();
-      expect(typeof googleAccountIdResult).toBe('string');
-
-      // Should be either empty string or a numeric string (Google Account ID)
-      if (googleAccountIdResult !== '') {
-        // If we have a cached ID, it should be a numeric string
-        expect(googleAccountIdResult).toMatch(/^\d+$/);
-      }
+      // They should be the same when no Google Account email is cached
+      expect(googleAccountEmailResult).toBe('');
     });
   });
 });
diff --git a/packages/core/src/utils/user_id.ts b/packages/core/src/utils/user_id.ts
index 42bbee35..045cbd77 100644
--- a/packages/core/src/utils/user_id.ts
+++ b/packages/core/src/utils/user_id.ts
@@ -8,8 +8,11 @@ import * as os from 'os';
 import * as fs from 'fs';
 import * as path from 'path';
 import { randomUUID } from 'crypto';
+import { createRequire } from 'module';
 import { GEMINI_DIR } from './paths.js';
 
+const require = createRequire(import.meta.url);
+
 const homeDir = os.homedir() ?? '';
 const geminiDir = path.join(homeDir, GEMINI_DIR);
 const installationIdFile = path.join(geminiDir, 'installation_id');
@@ -58,24 +61,23 @@ export function getInstallationId(): string {
 }
 
 /**
- * Retrieves the obfuscated Google Account ID for the currently authenticated user.
- * When OAuth is available, returns the user's cached Google Account ID. Otherwise, returns the installation ID.
- * @returns A string ID for the user (Google Account ID if available, otherwise installation ID).
+ * Retrieves the email for the currently authenticated user.
+ * When OAuth is available, returns the user's cached email. Otherwise, returns an empty string.
+ * @returns A string email for the user (Google Account email if available, otherwise empty string).
  */
-export async function getGoogleAccountId(): Promise<string> {
-  // Try to get cached Google Account ID first
+export function getGoogleAccountEmail(): string {
+  // Try to get cached Google Account email first
   try {
-    // Dynamic import to avoid circular dependencies
-    const { getCachedGoogleAccountId } = await import(
-      '../code_assist/oauth2.js'
-    );
-    const googleAccountId = getCachedGoogleAccountId();
-    if (googleAccountId) {
-      return googleAccountId;
+    // Dynamically import to avoid circular dependencies
+    // eslint-disable-next-line no-restricted-syntax
+    const { getCachedGoogleAccountEmail } = require('../code_assist/oauth2.js');
+    const googleAccountEmail = getCachedGoogleAccountEmail();
+    if (googleAccountEmail) {
+      return googleAccountEmail;
     }
   } catch (error) {
-    // If there's any error accessing Google Account ID, just return empty string
-    console.debug('Could not get cached Google Account ID:', error);
+    // If there's any error accessing Google Account email, just return empty string
+    console.debug('Could not get cached Google Account email:', error);
   }
 
   return '';