index.js

/**
 * @fileoverview An ESLint plugin for linting ESLint plugins
 * @author Teddy Katz
 */

'use strict';

// ------------------------------------------------------------------------------
// Requirements
// ------------------------------------------------------------------------------

const fs = require('fs');
const path = require('path');
const packageMetadata = require('../package');
const PLUGIN_NAME = packageMetadata.name.replace(/^eslint-plugin-/, '');

const configFilters = {
  all: () => true,
  recommended: rule => rule.meta.docs.recommended,
  rules: rule => rule.meta.docs.category === 'Rules',
  tests: rule => rule.meta.docs.category === 'Tests',
  'rules-recommended': rule => configFilters.recommended(rule) && configFilters.rules(rule),
  'tests-recommended': rule => configFilters.recommended(rule) && configFilters.tests(rule),
};

// ------------------------------------------------------------------------------
// Plugin Definition
// ------------------------------------------------------------------------------

// import all rules in lib/rules
const allRules = Object.fromEntries(fs
  .readdirSync(`${__dirname}/rules`)
  .filter(fileName => fileName.endsWith('.js') && /^[^._]/.test(fileName))
  .map(fileName => fileName.replace(/\.js$/, ''))
  .map(ruleName => [ruleName, require(path.join(__dirname, 'rules', ruleName))])
);

module.exports.rules = allRules;

// eslint-disable-next-line unicorn/prefer-object-from-entries
module.exports.configs = Object.keys(configFilters).reduce((configs, configName) => {
  return Object.assign(configs, {
    [configName]: {
      plugins: ['eslint-plugin'],
      rules: Object.fromEntries(Object.keys(allRules)
        .filter(ruleName => configFilters[configName](allRules[ruleName]))
        .map(ruleName => [`${PLUGIN_NAME}/${ruleName}`, 'error'])),
    },
  });
}, {});