eslint.config.mjs

import globals from 'globals';
import typescriptEslint from '@typescript-eslint/eslint-plugin';
import tsParser from '@typescript-eslint/parser';
import path from 'node:path';
import { fileURLToPath } from 'node:url';
import js from '@eslint/js';
import { FlatCompat } from '@eslint/eslintrc';

const __filename = fileURLToPath(import.meta.url);
const __dirname = path.dirname(__filename);

const compat = new FlatCompat({
  baseDirectory: __dirname,
  recommendedConfig: js.configs.recommended,
  allConfig: js.configs.all,
});

export default [
  { ignores: ['**/node_modules/', '**/dist/', 'src/templates/*.out.js'] },
  ...compat.extends('eslint:recommended', 'prettier'),
  {
    languageOptions: {
      globals: { ...globals.node },
      ecmaVersion: 5,
      sourceType: 'module',
    },
  },
  {
    files: ['scripts/*.js'],
    languageOptions: { globals: { ...globals.node } },
  },
  ...compat
    .extends(
      'plugin:@typescript-eslint/eslint-recommended',
      'plugin:@typescript-eslint/recommended'
    )
    .map(config => ({ ...config, files: ['src/**/*.ts'] })),
  {
    files: ['src/**/*.ts'],
    plugins: { '@typescript-eslint': typescriptEslint },
    languageOptions: {
      parser: tsParser,
      ecmaVersion: 5,
      sourceType: 'module',
      parserOptions: { project: './tsconfig.json' },
    },
    rules: {
      'no-unused-vars': 'off',
      '@typescript-eslint/strict-boolean-expressions': 'error',
      '@typescript-eslint/no-unused-vars': [
        'error',
        {
          argsIgnorePattern: '^_',
          varsIgnorePattern: '^_',
          caughtErrorsIgnorePattern: '^_',
          ignoreRestSiblings: true,
        },
      ],
      '@typescript-eslint/explicit-function-return-type': 'error',
      '@typescript-eslint/consistent-type-imports': 'error',
    },
  },
];