JSON errors in non-interactive auth validation (#8373)

integration-tests/json-output.test.ts

@@ -34,4 +34,38 @@ describe('JSON output', () => {
     expect(parsed).toHaveProperty('stats');
     expect(typeof parsed.stats).toBe('object');
   });
+
+  it('should return a JSON error for enforced auth mismatch before running', async () => {
+    process.env['GOOGLE_GENAI_USE_GCA'] = 'true';
+    await rig.setup('json-output-auth-mismatch', {
+      settings: {
+        security: { auth: { enforcedType: 'gemini-api-key' } },
+      },
+    });
+
+    let thrown: Error | undefined;
+    try {
+      await rig.run('Hello', '--output-format', 'json');
+      expect.fail('Expected process to exit with error');
+    } catch (e) {
+      thrown = e as Error;
+    } finally {
+      delete process.env['GOOGLE_GENAI_USE_GCA'];
+    }
+
+    expect(thrown).toBeDefined();
+    const message = (thrown as Error).message;
+    const jsonStart = message.indexOf('{');
+    expect(jsonStart).toBeGreaterThan(-1);
+    const payload = JSON.parse(message.slice(jsonStart));
+    expect(payload.error).toBeDefined();
+    expect(payload.error.type).toBe('Error');
+    expect(payload.error.code).toBe(1);
+    expect(payload.error.message).toContain(
+      'configured auth type is gemini-api-key',
+    );
+    expect(payload.error.message).toContain(
+      'current auth type is oauth-personal',
+    );
+  });
 });

packages/cli/src/validateNonInterActiveAuth.test.ts

@@ -6,7 +6,8 @@
 
 import { describe, it, expect, vi, beforeEach, afterEach } from 'vitest';
 import { validateNonInteractiveAuth } from './validateNonInterActiveAuth.js';
-import { AuthType } from '@google/gemini-cli-core';
+import { AuthType, OutputFormat } from '@google/gemini-cli-core';
+import type { Config } from '@google/gemini-cli-core';
 import * as auth from './config/auth.js';
 import { type LoadedSettings } from './config/settings.js';
 
@@ -74,6 +75,10 @@ describe('validateNonInterActiveAuth', () => {
   it('exits if no auth type is configured or env vars set', async () => {
     const nonInteractiveConfig = {
       refreshAuth: refreshAuthMock,
+      getOutputFormat: vi.fn().mockReturnValue(OutputFormat.TEXT),
+      getContentGeneratorConfig: vi
+        .fn()
+        .mockReturnValue({ authType: undefined }),
     };
     try {
       await validateNonInteractiveAuth(
@@ -223,6 +228,10 @@ describe('validateNonInterActiveAuth', () => {
     vi.spyOn(auth, 'validateAuthMethod').mockReturnValue('Auth error!');
     const nonInteractiveConfig = {
       refreshAuth: refreshAuthMock,
+      getOutputFormat: vi.fn().mockReturnValue(OutputFormat.TEXT),
+      getContentGeneratorConfig: vi
+        .fn()
+        .mockReturnValue({ authType: undefined }),
     };
     try {
       await validateNonInteractiveAuth(
@@ -286,6 +295,10 @@ describe('validateNonInterActiveAuth', () => {
     process.env['GOOGLE_GENAI_USE_VERTEXAI'] = 'true';
     const nonInteractiveConfig = {
       refreshAuth: refreshAuthMock,
+      getOutputFormat: vi.fn().mockReturnValue(OutputFormat.TEXT),
+      getContentGeneratorConfig: vi
+        .fn()
+        .mockReturnValue({ authType: undefined }),
     };
     try {
       await validateNonInteractiveAuth(
@@ -303,4 +316,107 @@ describe('validateNonInterActiveAuth', () => {
     );
     expect(processExitSpy).toHaveBeenCalledWith(1);
   });
+
+  describe('JSON output mode', () => {
+    it('prints JSON error when no auth is configured and exits with code 1', async () => {
+      const nonInteractiveConfig = {
+        refreshAuth: refreshAuthMock,
+        getOutputFormat: vi.fn().mockReturnValue(OutputFormat.JSON),
+        getContentGeneratorConfig: vi
+          .fn()
+          .mockReturnValue({ authType: undefined }),
+      };
+
+      let thrown: Error | undefined;
+      try {
+        await validateNonInteractiveAuth(
+          undefined,
+          undefined,
+          nonInteractiveConfig as unknown as Config,
+          mockSettings,
+        );
+      } catch (e) {
+        thrown = e as Error;
+      }
+
+      expect(thrown?.message).toBe('process.exit(1) called');
+      const errorArg = consoleErrorSpy.mock.calls[0]?.[0] as string;
+      const payload = JSON.parse(errorArg);
+      expect(payload.error.type).toBe('Error');
+      expect(payload.error.code).toBe(1);
+      expect(payload.error.message).toContain(
+        'Please set an Auth method in your',
+      );
+    });
+
+    it('prints JSON error when enforced auth mismatches current auth and exits with code 1', async () => {
+      mockSettings.merged.security.auth.enforcedType = AuthType.USE_GEMINI;
+      process.env['GOOGLE_GENAI_USE_GCA'] = 'true';
+
+      const nonInteractiveConfig = {
+        refreshAuth: refreshAuthMock,
+        getOutputFormat: vi.fn().mockReturnValue(OutputFormat.JSON),
+        getContentGeneratorConfig: vi
+          .fn()
+          .mockReturnValue({ authType: undefined }),
+      };
+
+      let thrown: Error | undefined;
+      try {
+        await validateNonInteractiveAuth(
+          undefined,
+          undefined,
+          nonInteractiveConfig as unknown as Config,
+          mockSettings,
+        );
+      } catch (e) {
+        thrown = e as Error;
+      }
+
+      expect(thrown?.message).toBe('process.exit(1) called');
+      {
+        const errorArg = consoleErrorSpy.mock.calls[0]?.[0] as string;
+        const payload = JSON.parse(errorArg);
+        expect(payload.error.type).toBe('Error');
+        expect(payload.error.code).toBe(1);
+        expect(payload.error.message).toContain(
+          'The configured auth type is gemini-api-key, but the current auth type is oauth-personal.',
+        );
+      }
+    });
+
+    it('prints JSON error when validateAuthMethod fails and exits with code 1', async () => {
+      vi.spyOn(auth, 'validateAuthMethod').mockReturnValue('Auth error!');
+      process.env['GEMINI_API_KEY'] = 'fake-key';
+
+      const nonInteractiveConfig = {
+        refreshAuth: refreshAuthMock,
+        getOutputFormat: vi.fn().mockReturnValue(OutputFormat.JSON),
+        getContentGeneratorConfig: vi
+          .fn()
+          .mockReturnValue({ authType: undefined }),
+      };
+
+      let thrown: Error | undefined;
+      try {
+        await validateNonInteractiveAuth(
+          AuthType.USE_GEMINI,
+          undefined,
+          nonInteractiveConfig as unknown as Config,
+          mockSettings,
+        );
+      } catch (e) {
+        thrown = e as Error;
+      }
+
+      expect(thrown?.message).toBe('process.exit(1) called');
+      {
+        const errorArg = consoleErrorSpy.mock.calls[0]?.[0] as string;
+        const payload = JSON.parse(errorArg);
+        expect(payload.error.type).toBe('Error');
+        expect(payload.error.code).toBe(1);
+        expect(payload.error.message).toBe('Auth error!');
+      }
+    });
+  });
 });

packages/cli/src/validateNonInterActiveAuth.ts

@@ -5,10 +5,11 @@
  */
 
 import type { Config } from '@google/gemini-cli-core';
-import { AuthType } from '@google/gemini-cli-core';
+import { AuthType, OutputFormat } from '@google/gemini-cli-core';
 import { USER_SETTINGS_PATH } from './config/settings.js';
 import { validateAuthMethod } from './config/auth.js';
 import { type LoadedSettings } from './config/settings.js';
+import { handleError } from './utils/errors.js';
 
 function getAuthTypeFromEnv(): AuthType | undefined {
   if (process.env['GOOGLE_GENAI_USE_GCA'] === 'true') {
@@ -29,14 +30,13 @@ export async function validateNonInteractiveAuth(
   nonInteractiveConfig: Config,
   settings: LoadedSettings,
 ) {
+  try {
     const enforcedType = settings.merged.security?.auth?.enforcedType;
     if (enforcedType) {
       const currentAuthType = getAuthTypeFromEnv();
       if (currentAuthType !== enforcedType) {
-      console.error(
+        const message = `The configured auth type is ${enforcedType}, but the current auth type is ${currentAuthType}. Please re-authenticate with the correct type.`;
-        `The configured auth type is ${enforcedType}, but the current auth type is ${currentAuthType}. Please re-authenticate with the correct type.`,
+        throw new Error(message);
-      );
-      process.exit(1);
       }
     }
 
@@ -44,20 +44,31 @@ export async function validateNonInteractiveAuth(
       enforcedType || getAuthTypeFromEnv() || configuredAuthType;
 
     if (!effectiveAuthType) {
-    console.error(
+      const message = `Please set an Auth method in your ${USER_SETTINGS_PATH} or specify one of the following environment variables before running: GEMINI_API_KEY, GOOGLE_GENAI_USE_VERTEXAI, GOOGLE_GENAI_USE_GCA`;
-      `Please set an Auth method in your ${USER_SETTINGS_PATH} or specify one of the following environment variables before running: GEMINI_API_KEY, GOOGLE_GENAI_USE_VERTEXAI, GOOGLE_GENAI_USE_GCA`,
+      throw new Error(message);
-    );
-    process.exit(1);
     }
 
+    const authType: AuthType = effectiveAuthType as AuthType;
+
     if (!useExternalAuth) {
-    const err = validateAuthMethod(effectiveAuthType);
+      const err = validateAuthMethod(String(authType));
       if (err != null) {
-      console.error(err);
+        throw new Error(err);
-      process.exit(1);
       }
     }
 
-  await nonInteractiveConfig.refreshAuth(effectiveAuthType);
+    await nonInteractiveConfig.refreshAuth(authType);
     return nonInteractiveConfig;
+  } catch (error) {
+    if (nonInteractiveConfig.getOutputFormat() === OutputFormat.JSON) {
+      handleError(
+        error instanceof Error ? error : new Error(String(error)),
+        nonInteractiveConfig,
+        1,
+      );
+    } else {
+      console.error(error instanceof Error ? error.message : String(error));
+      process.exit(1);
+    }
+  }
 }