eslint.config.mjs

import {fixupConfigRules} from '@eslint/compat';
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: ['**/dist/', '**/lib/', '**/node_modules/', '**/jest.config.js'],
  },
  ...fixupConfigRules(
    compat.extends(
      'eslint:recommended',
      'plugin:import/recommended',
      'plugin:import/typescript',
      'plugin:@typescript-eslint/recommended',
      'prettier',
      'plugin:prettier/recommended',
    ),
  ),
  {
    languageOptions: {
      parser: tsParser,
      ecmaVersion: 2019,
      sourceType: 'module',
    },

    rules: {
      'prettier/prettier': [
        'error',
        {
          singleQuote: true,
        },
      ],

      'import/order': [
        'error',
        {
          groups: ['index', 'sibling', 'parent', 'internal', 'external', 'builtin', 'object', 'type'],

          'newlines-between': 'always',

          alphabetize: {
            order: 'asc',
            caseInsensitive: true,
          },
        },
      ],

      'eol-last': ['error', 'always'],
    },
  },
];