update

node_modules/enhanced-resolve/lib/AliasPlugin.js

@@ -0,0 +1,77 @@
+/*
+	MIT License http://www.opensource.org/licenses/mit-license.php
+	Author Tobias Koppers @sokra
+*/
+"use strict";
+
+function startsWith(string, searchString) {
+	const stringLength = string.length;
+	const searchLength = searchString.length;
+
+	// early out if the search length is greater than the search string
+	if (searchLength > stringLength) {
+		return false;
+	}
+	let index = -1;
+	while (++index < searchLength) {
+		if (string.charCodeAt(index) !== searchString.charCodeAt(index)) {
+			return false;
+		}
+	}
+	return true;
+}
+
+module.exports = class AliasPlugin {
+	constructor(source, options, target) {
+		this.source = source;
+		this.options = Array.isArray(options) ? options : [options];
+		this.target = target;
+	}
+
+	apply(resolver) {
+		const target = resolver.ensureHook(this.target);
+		resolver
+			.getHook(this.source)
+			.tapAsync("AliasPlugin", (request, resolveContext, callback) => {
+				const innerRequest = request.request || request.path;
+				if (!innerRequest) return callback();
+				for (const item of this.options) {
+					if (
+						innerRequest === item.name ||
+						(!item.onlyModule && startsWith(innerRequest, item.name + "/"))
+					) {
+						if (
+							innerRequest !== item.alias &&
+							!startsWith(innerRequest, item.alias + "/")
+						) {
+							const newRequestStr =
+								item.alias + innerRequest.substr(item.name.length);
+							const obj = Object.assign({}, request, {
+								request: newRequestStr
+							});
+							return resolver.doResolve(
+								target,
+								obj,
+								"aliased with mapping '" +
+									item.name +
+									"': '" +
+									item.alias +
+									"' to '" +
+									newRequestStr +
+									"'",
+								resolveContext,
+								(err, result) => {
+									if (err) return callback(err);
+
+									// Don't allow other aliasing or raw request
+									if (result === undefined) return callback(null, null);
+									callback(null, result);
+								}
+							);
+						}
+					}
+				}
+				return callback();
+			});
+	}
+};