webpack-config/dist/ConfigLoader.js

Helps to load, extend and merge webpack configs

'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});

var _weakMap = require('babel-runtime/core-js/weak-map');

var _weakMap2 = _interopRequireDefault(_weakMap);

var _lodash = require('lodash');

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

/**
 * @private
 * @type {WeakMap}
 */
const PATH_RESOLVER = new _weakMap2.default();

/**
 * @private
 * @type {WeakMap}
 */
const CACHE = new _weakMap2.default();

/**
 * @private
 * @type {WeakMap}
 */
const FACTORY = new _weakMap2.default();

/**
 * @class
 */
class ConfigLoader {
  /**
   * @constructor
   * @param {ConfigPathResolver} pathResolver
   * @param {ConfigCache} cache
   * @param {ConfigFactory} factory
   */
  constructor(pathResolver, cache, factory) {
    PATH_RESOLVER.set(this, pathResolver);
    CACHE.set(this, cache);
    FACTORY.set(this, factory);
  }

  /**
   * @readonly
   * @type {ConfigPathResolver}
   */
  get pathResolver() {
    return PATH_RESOLVER.get(this);
  }

  /**
   * @readonly
   * @type {ConfigCache}
   */
  get cache() {
    return CACHE.get(this);
  }

  /**
   * @readonly
   * @type {ConfigFactory}
   */
  get factory() {
    return FACTORY.get(this);
  }

  /**
   * @param {String} filename
   * @returns {Config|ConfigList}
   */
  loadConfig(filename) {
    filename = this.pathResolver.resolve(filename);

    let config = this.cache.get(filename);

    if (config) {
      config = this.factory.createConfig(config);
    }

    if (config && !(0, _lodash.isString)(config.filename)) {
      config.filename = filename;
    }

    return config;
  }
}

exports.default = ConfigLoader;
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