настройка webpack

node_modules/webpack/lib/OptionsDefaulter.js

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+/*
+	MIT License http://www.opensource.org/licenses/mit-license.php
+	Author Tobias Koppers @sokra
+*/
+"use strict";
+
+/**
+ * Gets the value at path of object
+ * @param {object} obj object to query
+ * @param {string} path query path
+ * @returns {any} - if {@param path} requests element from array, then `undefined` will be returned
+ */
+const getProperty = (obj, path) => {
+	let name = path.split(".");
+	for (let i = 0; i < name.length - 1; i++) {
+		obj = obj[name[i]];
+		if (typeof obj !== "object" || !obj || Array.isArray(obj)) return;
+	}
+	return obj[name.pop()];
+};
+
+/**
+ * Sets the value at path of object. Stops execution, if {@param path} requests element from array to be set
+ * @param {object} obj object to query
+ * @param {string} path query path
+ * @param {any} value value to be set
+ * @returns {void}
+ */
+const setProperty = (obj, path, value) => {
+	let name = path.split(".");
+	for (let i = 0; i < name.length - 1; i++) {
+		if (typeof obj[name[i]] !== "object" && obj[name[i]] !== undefined) return;
+		if (Array.isArray(obj[name[i]])) return;
+		if (!obj[name[i]]) obj[name[i]] = {};
+		obj = obj[name[i]];
+	}
+	obj[name.pop()] = value;
+};
+
+/**
+ * @typedef {'call' | 'make' | 'append'} ConfigType
+ */
+/**
+ * @typedef {(options: object) => any} MakeConfigHandler
+ */
+/**
+ * @typedef {(value: any, options: object) => any} CallConfigHandler
+ */
+/**
+ * @typedef {any[]} AppendConfigValues
+ */
+
+class OptionsDefaulter {
+	constructor() {
+		/**
+		 * Stores default options settings or functions for computing them
+		 */
+		this.defaults = {};
+		/**
+		 * Stores configuration for options
+		 * @type {{[key: string]: ConfigType}}
+		 */
+		this.config = {};
+	}
+
+	/**
+	 * Enhancing {@param options} with default values
+	 * @param {object} options provided options
+	 * @returns {object} - enhanced options
+	 * @throws {Error} - will throw error, if configuration value is other then `undefined` or {@link ConfigType}
+	 */
+	process(options) {
+		options = Object.assign({}, options);
+		for (let name in this.defaults) {
+			switch (this.config[name]) {
+				/**
+				 * If {@link ConfigType} doesn't specified and current value is `undefined`, then default value will be assigned
+				 */
+				case undefined:
+					if (getProperty(options, name) === undefined) {
+						setProperty(options, name, this.defaults[name]);
+					}
+					break;
+				/**
+				 * Assign result of {@link CallConfigHandler}
+				 */
+				case "call":
+					setProperty(
+						options,
+						name,
+						this.defaults[name].call(this, getProperty(options, name), options)
+					);
+					break;
+				/**
+				 * Assign result of {@link MakeConfigHandler}, if current value is `undefined`
+				 */
+				case "make":
+					if (getProperty(options, name) === undefined) {
+						setProperty(options, name, this.defaults[name].call(this, options));
+					}
+					break;
+				/**
+				 * Adding {@link AppendConfigValues} at the end of the current array
+				 */
+				case "append": {
+					let oldValue = getProperty(options, name);
+					if (!Array.isArray(oldValue)) {
+						oldValue = [];
+					}
+					oldValue.push(...this.defaults[name]);
+					setProperty(options, name, oldValue);
+					break;
+				}
+				default:
+					throw new Error(
+						"OptionsDefaulter cannot process " + this.config[name]
+					);
+			}
+		}
+		return options;
+	}
+
+	/**
+	 * Builds up default values
+	 * @param {string} name option path
+	 * @param {ConfigType | any} config if {@param def} is provided, then only {@link ConfigType} is allowed
+	 * @param {MakeConfigHandler | CallConfigHandler | AppendConfigValues} [def] defaults
+	 * @returns {void}
+	 */
+	set(name, config, def) {
+		if (def !== undefined) {
+			this.defaults[name] = def;
+			this.config[name] = config;
+		} else {
+			this.defaults[name] = config;
+			delete this.config[name];
+		}
+	}
+}
+
+module.exports = OptionsDefaulter;