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* @license
* Copyright 2026 Google LLC
* SPDX-License-Identifier: Apache-2.0
*/
import * as path from 'node:path';
import type * as osActual from 'node:os';
vi.mock('node:os', async (importOriginal) => {
const actualOs = await importOriginal<typeof osActual>();
return {
...actualOs,
homedir: vi.fn(() => path.resolve('/mock/home')),
platform: vi.fn(() => 'linux'),
};
});
vi.mock('@google/gemini-cli-core', async (importOriginal) => {
const actual =
await importOriginal<typeof import('@google/gemini-cli-core')>();
return {
...actual,
homedir: vi.fn(() => path.resolve('/mock/home')),
};
});
import { describe, it, expect, vi, beforeEach, afterEach } from 'vitest';
import * as fs from 'node:fs';
import * as os from 'node:os';
import { loadEnvironment, type Settings } from './settings.js';
import { GEMINI_DIR, homedir as coreHomedir } from '@google/gemini-cli-core';
vi.mock('node:fs');
describe('Environment Isolation', () => {
const mockHome = path.resolve('/mock/home');
const mockWorkspace = path.resolve('/mock/workspace');
const originalArgv = process.argv;
const originalEnv = { ...process.env };
beforeEach(() => {
vi.resetAllMocks();
vi.mocked(os.homedir).mockReturnValue(mockHome);
vi.mocked(coreHomedir).mockReturnValue(mockHome);
// Default to no files existing
vi.mocked(fs.existsSync).mockReturnValue(false);
process.argv = ['node', 'gemini'];
// Clear env vars that might leak from the host environment
delete process.env['GEMINI_API_KEY'];
delete process.env['OTHER_VAR'];
});
afterEach(() => {
process.argv = originalArgv;
process.env = { ...originalEnv };
});
it('should load local .env by default', () => {
const workspaceEnv = path.join(mockWorkspace, '.env');
vi.mocked(fs.existsSync).mockImplementation(
(p) => p.toString() === workspaceEnv,
);
vi.mocked(fs.readFileSync).mockReturnValue('GEMINI_API_KEY=local');
const settings = { advanced: { ignoreLocalEnv: false } } as Settings;
loadEnvironment(settings, mockWorkspace, () => ({
isTrusted: true,
source: 'file',
}));
expect(process.env['GEMINI_API_KEY']).toBe('local');
delete process.env['GEMINI_API_KEY'];
});
it('should ignore local .env when ignoreLocalEnv is true', () => {
const workspaceEnv = path.join(mockWorkspace, '.env');
const homeEnv = path.join(mockHome, '.env');
vi.mocked(fs.existsSync).mockImplementation((p) => {
const ps = p.toString();
return ps === workspaceEnv || ps === homeEnv;
});
vi.mocked(fs.readFileSync).mockImplementation((p) => {
const ps = p.toString();
if (ps === workspaceEnv) return 'GEMINI_API_KEY=local';
if (ps === homeEnv) return 'GEMINI_API_KEY=home';
return '';
});
const settings = { advanced: { ignoreLocalEnv: true } } as Settings;
loadEnvironment(settings, mockWorkspace, () => ({
isTrusted: true,
source: 'file',
}));
// Should skip local and find home
expect(process.env['GEMINI_API_KEY']).toBe('home');
delete process.env['GEMINI_API_KEY'];
});
it('should still load .gemini/.env even if ignoreLocalEnv is true', () => {
const workspaceGeminiEnv = path.join(mockWorkspace, GEMINI_DIR, '.env');
vi.mocked(fs.existsSync).mockImplementation(
(p) => p.toString() === workspaceGeminiEnv,
);
vi.mocked(fs.readFileSync).mockReturnValue('GEMINI_API_KEY=gemini-local');
const settings = { advanced: { ignoreLocalEnv: true } } as Settings;
loadEnvironment(settings, mockWorkspace, () => ({
isTrusted: true,
source: 'file',
}));
expect(process.env['GEMINI_API_KEY']).toBe('gemini-local');
delete process.env['GEMINI_API_KEY'];
});
it('should respect --ignore-env flag', () => {
const workspaceEnv = path.join(mockWorkspace, '.env');
vi.mocked(fs.existsSync).mockImplementation(
(p) => p.toString() === workspaceEnv,
);
vi.mocked(fs.readFileSync).mockReturnValue('GEMINI_API_KEY=local');
process.argv = ['node', 'gemini', '--ignore-env'];
const settings = { advanced: { ignoreLocalEnv: false } } as Settings;
loadEnvironment(settings, mockWorkspace, () => ({
isTrusted: true,
source: 'file',
}));
expect(process.env['GEMINI_API_KEY']).toBeUndefined();
});
it('should allow home .env even with ignoreLocalEnv true', () => {
const homeEnv = path.join(mockHome, '.env');
vi.mocked(fs.existsSync).mockImplementation(
(p) => p.toString() === homeEnv,
);
vi.mocked(fs.readFileSync).mockReturnValue('GEMINI_API_KEY=home');
const settings = { advanced: { ignoreLocalEnv: true } } as Settings;
// Running from home dir
loadEnvironment(settings, mockHome, () => ({
isTrusted: true,
source: 'file',
}));
expect(process.env['GEMINI_API_KEY']).toBe('home');
delete process.env['GEMINI_API_KEY'];
});
it('should skip local .env and its parents until home when ignoreLocalEnv is true', () => {
const deepProject = path.join(mockWorkspace, 'deep', 'dir');
const deepEnv = path.join(deepProject, '.env');
const parentEnv = path.join(mockWorkspace, '.env');
const homeEnv = path.join(mockHome, '.env');
vi.mocked(fs.existsSync).mockImplementation((p) => {
const ps = p.toString();
return ps === deepEnv || ps === parentEnv || ps === homeEnv;
});
vi.mocked(fs.readFileSync).mockImplementation((p) => {
const ps = p.toString();
if (ps === deepEnv) return 'GEMINI_API_KEY=deep';
if (ps === parentEnv) return 'GEMINI_API_KEY=parent';
if (ps === homeEnv) return 'GEMINI_API_KEY=home';
return '';
});
const settings = { advanced: { ignoreLocalEnv: true } } as Settings;
loadEnvironment(settings, deepProject, () => ({
isTrusted: true,
source: 'file',
}));
expect(process.env['GEMINI_API_KEY']).toBe('home');
delete process.env['GEMINI_API_KEY'];
});
it('should respect trust whitelist even when loading from home .env', () => {
const homeEnv = path.join(mockHome, '.env');
vi.mocked(fs.existsSync).mockImplementation(
(p) => p.toString() === homeEnv,
);
// Include one whitelisted and one non-whitelisted variable
vi.mocked(fs.readFileSync).mockReturnValue(
'GEMINI_API_KEY=home\nOTHER_VAR=secret',
);
const settings = { advanced: { ignoreLocalEnv: true } } as Settings;
// Running from an UNTRUSTED workspace
loadEnvironment(settings, mockWorkspace, () => ({
isTrusted: false,
source: 'file',
}));
expect(process.env['GEMINI_API_KEY']).toBe('home');
expect(process.env['OTHER_VAR']).toBeUndefined();
delete process.env['GEMINI_API_KEY'];
});
it('should prioritize --ignore-env flag even if setting is false', () => {
const workspaceEnv = path.join(mockWorkspace, '.env');
vi.mocked(fs.existsSync).mockImplementation(
(p) => p.toString() === workspaceEnv,
);
vi.mocked(fs.readFileSync).mockReturnValue('GEMINI_API_KEY=local');
process.argv = ['node', 'gemini', '--ignore-env'];
const settings = { advanced: { ignoreLocalEnv: false } } as Settings;
loadEnvironment(settings, mockWorkspace, () => ({
isTrusted: true,
source: 'file',
}));
expect(process.env['GEMINI_API_KEY']).toBeUndefined();
});
it('should respect both -s and --ignore-env flags simultaneously', () => {
const workspaceEnv = path.join(mockWorkspace, '.env');
vi.mocked(fs.existsSync).mockImplementation(
(p) => p.toString() === workspaceEnv,
);
vi.mocked(fs.readFileSync).mockReturnValue('GEMINI_API_KEY=local');
process.argv = ['node', 'gemini', '-s', '--ignore-env'];
const settings = { advanced: { ignoreLocalEnv: false } } as Settings;
loadEnvironment(settings, mockWorkspace, () => ({
isTrusted: true,
source: 'file',
}));
expect(process.env['GEMINI_API_KEY']).toBeUndefined();
});
});
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