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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 globals from 'globals';
import licenseHeader from 'eslint-plugin-license-header';
import noRelativeCrossPackageImports from './eslint-rules/no-relative-cross-package-imports.js';
import path from 'node:path'; // Use node: prefix for built-ins
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;
export default tseslint.config(
{
// Global ignores
ignores: [
'node_modules/*',
'eslint.config.js',
'packages/cli/dist/**',
'packages/core/dist/**',
'packages/server/dist/**',
'eslint-rules/*',
'bundle/**',
],
},
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',
},
},
},
{
// Import specific config
files: ['packages/cli/src/**/*.{ts,tsx}'], // Target only TS/TSX in the cli package
plugins: {
import: importPlugin,
},
settings: {
'import/resolver': {
node: true,
},
},
rules: {
...importPlugin.configs.recommended.rules,
...importPlugin.configs.typescript.rules,
'import/no-default-export': 'warn',
'import/no-unresolved': 'off', // Disable for now, can be noisy with monorepos/paths
},
},
{
// General overrides and rules for the project (TS/TSX files)
files: ['packages/*/src/**/*.{ts,tsx}'], // Target only TS/TSX in the cli package
languageOptions: {
globals: {
...globals.node,
...globals.es2021,
},
},
rules: {
// 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/no-namespace': ['error', { allowDeclarations: true }],
'@typescript-eslint/no-unused-vars': [
'error',
{
argsIgnorePattern: '^_',
varsIgnorePattern: '^_',
caughtErrorsIgnorePattern: '^_',
},
],
'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',
'default-case': 'error',
},
},
{
files: ['./**/*.{tsx,ts,js}'],
plugins: {
'license-header': licenseHeader,
},
rules: {
'license-header/header': [
'error',
[
'/**',
' * @license',
' * Copyright 2025 Google LLC',
' * SPDX-License-Identifier: Apache-2.0',
' */',
],
],
},
},
// extra settings for scripts that we run directly with node
{
files: ['./scripts/**/*.js', 'esbuild.config.js'],
languageOptions: {
globals: {
...globals.node,
process: 'readonly',
console: 'readonly',
},
},
rules: {
'@typescript-eslint/no-unused-vars': [
'error',
{
argsIgnorePattern: '^_',
varsIgnorePattern: '^_',
caughtErrorsIgnorePattern: '^_',
},
],
},
},
// 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: '^_',
},
],
},
},
// Custom eslint rules for this repo
{
files: ['packages/**/*.{js,jsx,ts,tsx}'],
plugins: {
custom: {
rules: {
'no-relative-cross-package-imports': noRelativeCrossPackageImports,
},
},
},
rules: {
// Enable and configure your custom rule
'custom/no-relative-cross-package-imports': [
'error',
{
root: path.join(projectRoot, 'packages'),
},
],
},
},
);