eslint.config.js

import { readFileSync } from 'node:fs';
import js from '@eslint/js';
import tseslint from 'typescript-eslint';
import eslintPluginUnicorn from 'eslint-plugin-unicorn';
import { FlatCompat } from '@eslint/eslintrc';
import eslintPluginPrettierRecommended from 'eslint-plugin-prettier/recommended';

const tsconfig = JSON.parse(readFileSync('./tsconfig.json', 'utf8'));
const compat = new FlatCompat({ baseDirectory: import.meta.dirname });

export default defineConfig([
    js.configs.recommended,
    ...tseslint.configs.recommended,
    ...tseslint.configs.recommendedTypeChecked.map((config) => ({
        ...config,
        files: tsconfig.include,
    })),
    {
        files: tsconfig.include,
        languageOptions: {
            parserOptions: {
                project: true,
                tsconfigRootDir: import.meta.dirname,
            },
        },
    },
    {
        plugins: { unicorn: eslintPluginUnicorn },
        rules: { 'unicorn/prefer-node-protocol': 'error' },
    },
    ...compat.plugins('eslint-plugin-import'),
    {
        // Require specifying extensions due to https://github.com/microsoft/TypeScript/issues/16577
        files: ['src/**'],
        rules: { 'import/extensions': ['error', 'always'] },
    },
    {
        files: ['test/**'],
        rules: {
            '@typescript-eslint/no-unsafe-argument': 'off',
            '@typescript-eslint/no-unsafe-assignment': 'off',
        },
    },
    { ignores: ['dist', '.eslintrc.cjs'] },
    eslintPluginPrettierRecommended,
]);

/** @param config {import('eslint').Linter.FlatConfig} */
function defineConfig(config) {
    return config;
}