eslint.config.mjs

import path from 'node:path'
import { fileURLToPath } from 'node:url'

import { fixupConfigRules, fixupPluginRules } from '@eslint/compat'
import { FlatCompat } from '@eslint/eslintrc'
import js from '@eslint/js'
import typescriptEslint from '@typescript-eslint/eslint-plugin'
import tsParser from '@typescript-eslint/parser'
import _import from 'eslint-plugin-import'
import n from 'eslint-plugin-n'
import simpleImportSort from 'eslint-plugin-simple-import-sort'
import globals from 'globals'

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 [
  ...fixupConfigRules(
    compat.extends(
      'eslint:recommended',
      'plugin:import/typescript',
      'plugin:@typescript-eslint/eslint-recommended',
      'plugin:@typescript-eslint/recommended'
    )
  ),
  {
    plugins: {
      import: fixupPluginRules(_import),
      'simple-import-sort': simpleImportSort,
      n,
      '@typescript-eslint': fixupPluginRules(typescriptEslint),
    },

    languageOptions: {
      globals: {
        ...globals.browser,
        ...globals.node,
      },

      parser: tsParser,
      ecmaVersion: 5,
      sourceType: 'module',

      parserOptions: {
        project: 'tsconfig.json',
      },
    },

    rules: {
      'import/no-cycle': 'error',
      'n/no-extraneous-import': 'error',
      '@typescript-eslint/no-explicit-any': 'error',
      '@typescript-eslint/no-non-null-assertion': 'error',
      'simple-import-sort/imports': 'error',
      'simple-import-sort/exports': 'error',
    },
  },
  {
    files: ['test/**'],

    rules: {
      '@typescript-eslint/no-non-null-assertion': 'off',
    },
  },
]