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/**
* @license
* Copyright 2025 Google LLC
* SPDX-License-Identifier: Apache-2.0
*/
import eslint from '@eslint/js';
import tseslint from 'typescript-eslint';
import reactPlugin from 'eslint-plugin-react';
import reactHooks from 'eslint-plugin-react-hooks';
import prettierConfig from 'eslint-config-prettier';
import importPlugin from 'eslint-plugin-import';
import vitest from '@vitest/eslint-plugin';
import globals from 'globals';
import headers from 'eslint-plugin-headers';
import path from 'node:path';
import url from 'node:url';
// --- ESM way to get __dirname ---
const __filename = url.fileURLToPath(import.meta.url);
const __dirname = path.dirname(__filename);
// --- ---
// Determine the monorepo root (assuming eslint.config.js is at the root)
const projectRoot = __dirname;
const currentYear = new Date().getFullYear();
export default tseslint.config(
{
// Global ignores
ignores: [
'node_modules/*',
'eslint.config.js',
'packages/**/dist/**',
'bundle/**',
'package/bundle/**',
'.integration-tests/**',
'dist/**',
'evals/**',
'packages/test-utils/**',
'.gemini/skills/**',
],
},
eslint.configs.recommended,
...tseslint.configs.recommended,
reactHooks.configs['recommended-latest'],
reactPlugin.configs.flat.recommended,
reactPlugin.configs.flat['jsx-runtime'], // Add this if you are using React 17+
{
// Settings for eslint-plugin-react
settings: {
react: {
version: 'detect',
},
},
},
{
// Rules for packages/*/src (TS/TSX)
files: ['packages/*/src/**/*.{ts,tsx}'],
plugins: {
import: importPlugin,
},
settings: {
'import/resolver': {
node: true,
},
},
languageOptions: {
parser: tseslint.parser,
parserOptions: {
projectService: true,
tsconfigRootDir: projectRoot,
},
globals: {
...globals.node,
...globals.es2021,
},
},
rules: {
...importPlugin.configs.recommended.rules,
...importPlugin.configs.typescript.rules,
'import/no-default-export': 'warn',
'import/no-unresolved': 'off',
'import/no-duplicates': 'error',
// General Best Practice Rules (subset adapted for flat config)
'@typescript-eslint/array-type': ['error', { default: 'array-simple' }],
'arrow-body-style': ['error', 'as-needed'],
curly: ['error', 'multi-line'],
eqeqeq: ['error', 'always', { null: 'ignore' }],
'@typescript-eslint/consistent-type-assertions': [
'error',
{ assertionStyle: 'as' },
],
'@typescript-eslint/explicit-member-accessibility': [
'error',
{ accessibility: 'no-public' },
],
'@typescript-eslint/no-explicit-any': 'error',
'@typescript-eslint/no-inferrable-types': [
'error',
{ ignoreParameters: true, ignoreProperties: true },
],
'@typescript-eslint/consistent-type-imports': [
'error',
{ disallowTypeAnnotations: false },
],
'@typescript-eslint/no-namespace': ['error', { allowDeclarations: true }],
'@typescript-eslint/no-unused-vars': [
'error',
{
argsIgnorePattern: '^_',
varsIgnorePattern: '^_',
caughtErrorsIgnorePattern: '^_',
},
],
// Prevent async errors from bypassing catch handlers
'@typescript-eslint/return-await': ['error', 'in-try-catch'],
'import/no-internal-modules': 'off',
'import/no-relative-packages': 'error',
'no-cond-assign': 'error',
'no-debugger': 'error',
'no-duplicate-case': 'error',
'no-restricted-syntax': [
'error',
{
selector: 'CallExpression[callee.name="require"]',
message: 'Avoid using require(). Use ES6 imports instead.',
},
{
selector: 'ThrowStatement > Literal:not([value=/^\\w+Error:/])',
message:
'Do not throw string literals or non-Error objects. Throw new Error("...") instead.',
},
],
'no-unsafe-finally': 'error',
'no-unused-expressions': 'off', // Disable base rule
'@typescript-eslint/no-unused-expressions': [
// Enable TS version
'error',
{ allowShortCircuit: true, allowTernary: true },
],
'no-var': 'error',
'object-shorthand': 'error',
'one-var': ['error', 'never'],
'prefer-arrow-callback': 'error',
'prefer-const': ['error', { destructuring: 'all' }],
radix: 'error',
'no-console': 'error',
'default-case': 'error',
'@typescript-eslint/await-thenable': ['error'],
'@typescript-eslint/no-floating-promises': ['error'],
'@typescript-eslint/no-unnecessary-type-assertion': ['error'],
'no-restricted-imports': [
'error',
{
paths: [
{
name: 'node:os',
importNames: ['homedir', 'tmpdir'],
message:
'Please use the helpers from @google/gemini-cli-core instead of node:os homedir()/tmpdir() to ensure strict environment isolation.',
},
{
name: 'os',
importNames: ['homedir', 'tmpdir'],
message:
'Please use the helpers from @google/gemini-cli-core instead of os homedir()/tmpdir() to ensure strict environment isolation.',
},
],
},
],
},
},
{
// Rules that only apply to product code
files: ['packages/*/src/**/*.{ts,tsx}'],
ignores: ['**/*.test.ts', '**/*.test.tsx'],
rules: {
'@typescript-eslint/no-unsafe-type-assertion': 'error',
'@typescript-eslint/no-unsafe-assignment': 'error',
'@typescript-eslint/no-unsafe-return': 'error',
},
},
{
// Allow os.homedir() in tests and paths.ts where it is used to implement the helper
files: [
'**/*.test.ts',
'**/*.test.tsx',
'packages/core/src/utils/paths.ts',
'packages/test-utils/src/**/*.ts',
'scripts/**/*.js',
],
rules: {
'no-restricted-imports': 'off',
},
},
{
// Prevent self-imports in packages
files: ['packages/core/src/**/*.{ts,tsx}'],
rules: {
'no-restricted-imports': [
'error',
{
name: '@google/gemini-cli-core',
message: 'Please use relative imports within the @google/gemini-cli-core package.',
},
],
},
},
{
files: ['packages/cli/src/**/*.{ts,tsx}'],
rules: {
'no-restricted-imports': [
'error',
{
name: '@google/gemini-cli',
message: 'Please use relative imports within the @google/gemini-cli package.',
},
],
},
},
{
files: ['packages/sdk/src/**/*.{ts,tsx}'],
rules: {
'no-restricted-imports': [
'error',
{
name: '@google/gemini-cli-sdk',
message: 'Please use relative imports within the @google/gemini-cli-sdk package.',
},
],
},
},
{
files: ['packages/*/src/**/*.test.{ts,tsx}'],
plugins: {
vitest,
},
rules: {
...vitest.configs.recommended.rules,
'vitest/expect-expect': 'off',
'vitest/no-commented-out-tests': 'off',
},
},
{
files: ['./**/*.{tsx,ts,js,cjs}'],
plugins: {
headers,
import: importPlugin,
},
rules: {
'headers/header-format': [
'error',
{
source: 'string',
content: [
'@license',
'Copyright (year) Google LLC',
'SPDX-License-Identifier: Apache-2.0',
].join('\n'),
patterns: {
year: {
pattern: `202[5-${currentYear.toString().slice(-1)}]`,
defaultValue: currentYear.toString(),
},
},
},
],
'import/enforce-node-protocol-usage': ['error', 'always'],
},
},
{
files: ['./scripts/**/*.js', 'esbuild.config.js'],
languageOptions: {
globals: {
...globals.node,
process: 'readonly',
console: 'readonly',
},
},
rules: {
'@typescript-eslint/no-unused-vars': [
'error',
{
argsIgnorePattern: '^_',
varsIgnorePattern: '^_',
caughtErrorsIgnorePattern: '^_',
},
],
},
},
{
files: ['**/*.cjs'],
languageOptions: {
sourceType: 'commonjs',
globals: {
...globals.node,
},
},
rules: {
'no-restricted-syntax': 'off',
'no-console': 'off',
'no-empty': 'off',
'no-redeclare': 'off',
'@typescript-eslint/no-require-imports': 'off',
'@typescript-eslint/no-unused-vars': [
'error',
{
argsIgnorePattern: '^_',
varsIgnorePattern: '^_',
caughtErrorsIgnorePattern: '^_',
},
],
},
},
{
files: ['packages/vscode-ide-companion/esbuild.js'],
languageOptions: {
globals: {
...globals.node,
process: 'readonly',
console: 'readonly',
},
},
rules: {
'no-restricted-syntax': 'off',
'@typescript-eslint/no-require-imports': 'off',
},
},
// Examples should have access to standard globals like fetch
{
files: ['packages/cli/src/commands/extensions/examples/**/*.js'],
languageOptions: {
globals: {
...globals.node,
fetch: 'readonly',
},
},
},
// extra settings for scripts that we run directly with node
{
files: ['packages/vscode-ide-companion/scripts/**/*.js'],
languageOptions: {
globals: {
...globals.node,
process: 'readonly',
console: 'readonly',
},
},
rules: {
'no-restricted-syntax': 'off',
'@typescript-eslint/no-require-imports': 'off',
},
},
// Prettier config must be last
prettierConfig,
// extra settings for scripts that we run directly with node
{
files: ['./integration-tests/**/*.js'],
languageOptions: {
globals: {
...globals.node,
process: 'readonly',
console: 'readonly',
},
},
rules: {
'@typescript-eslint/no-unused-vars': [
'error',
{
argsIgnorePattern: '^_',
varsIgnorePattern: '^_',
caughtErrorsIgnorePattern: '^_',
},
],
},
},
);