Bug: eslint cant load esm plugin

Environment

Node version: npm version: 16.15.0 Local ESLint version: 8.21.0 Global ESLint version: - Operating System: Ubuntu

What parser are you using?

Default (Espree)

What did you do?

Trying to load an esm plugin with new ESLint and I can’t get it to work. Below should work according to documentation here.

Minimal Example

import { dirname } from 'path';
import { fileURLToPath } from 'url';
import { ESLint } from "eslint";
import bf from '@blackflux/eslint-plugin-rules';
import json from "eslint-plugin-json";
import mocha from "eslint-plugin-mocha";

const eslint = new ESLint({
  cwd: dirname(fileURLToPath(import.meta.url)),
  fix: false,
  baseConfig: {
    root: true,
    extends: [
      'airbnb-base',
      'plugin:mocha/recommended',
      'plugin:markdown/recommended'
    ],
    rules: {
      '@blackflux/rules/c8-prevent-ignore': 1
    },
    env: {
      es6: true,
      node: true,
      mocha: true
    },
    globals: {},
    parser: '@babel/eslint-parser',
    parserOptions: {
      requireConfigFile: false
    },
    plugins: [
      { id: '@blackflux/rules', definition: bf }
    ]
  },
  // we use glob on passed in files, due to https://github.com/eslint/eslint/issues/5623
  ignore: false,
  reportUnusedDisableDirectives: 'error'
});

const results = await eslint.lintFiles([
  fileURLToPath(import.meta.url)
]);

But I’m getting The "path" argument must be of type string. Received an instance of Object

What did you expect to happen?

Eslint should load the plugin

What actually happened?

Eslint can’t load the plugin

Participation

• I am willing to submit a pull request for this issue.

Additional comments

No response

[simlu]

No, this comment clarifies that you can’t. #15453 (comment)

I was talking about the comment after the one you linked. The last one in the ticket! It details that you can when using eslint programmatically

[ljharb]

This isn’t a bug; eslint uses require, and you can’t require ESM. Additionally, ESM is async, and eslint plugins/configs must be sync.