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/**
* @license
* Copyright 2025 Google LLC
* SPDX-License-Identifier: Apache-2.0
*/
import { AuthType } from '@google/gemini-cli-core';
import { loadEnvironment } from './settings.js';
export const validateAuthMethod = (authMethod: string): string | null => {
loadEnvironment();
if (
authMethod === AuthType.LOGIN_WITH_GOOGLE ||
authMethod === AuthType.CLOUD_SHELL
) {
return null;
}
if (authMethod === AuthType.USE_GEMINI) {
if (!process.env['GEMINI_API_KEY']) {
return 'GEMINI_API_KEY environment variable not found. Add that to your environment and try again (no reload needed if using .env)!';
}
return null;
}
if (authMethod === AuthType.USE_VERTEX_AI) {
const hasVertexProjectLocationConfig =
!!process.env['GOOGLE_CLOUD_PROJECT'] &&
!!process.env['GOOGLE_CLOUD_LOCATION'];
const hasGoogleApiKey = !!process.env['GOOGLE_API_KEY'];
if (!hasVertexProjectLocationConfig && !hasGoogleApiKey) {
return (
'When using Vertex AI, you must specify either:\n' +
'• GOOGLE_CLOUD_PROJECT and GOOGLE_CLOUD_LOCATION environment variables.\n' +
'• GOOGLE_API_KEY environment variable (if using express mode).\n' +
'Update your environment and try again (no reload needed if using .env)!'
);
}
return null;
}
return 'Invalid auth method selected.';
};
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