update

node_modules/enhanced-resolve/lib/AliasFieldPlugin.js

@@ -0,0 +1,74 @@
+/*
+	MIT License http://www.opensource.org/licenses/mit-license.php
+	Author Tobias Koppers @sokra
+*/
+"use strict";
+
+const DescriptionFileUtils = require("./DescriptionFileUtils");
+const getInnerRequest = require("./getInnerRequest");
+
+module.exports = class AliasFieldPlugin {
+	constructor(source, field, target) {
+		this.source = source;
+		this.field = field;
+		this.target = target;
+	}
+
+	apply(resolver) {
+		const target = resolver.ensureHook(this.target);
+		resolver
+			.getHook(this.source)
+			.tapAsync("AliasFieldPlugin", (request, resolveContext, callback) => {
+				if (!request.descriptionFileData) return callback();
+				const innerRequest = getInnerRequest(resolver, request);
+				if (!innerRequest) return callback();
+				const fieldData = DescriptionFileUtils.getField(
+					request.descriptionFileData,
+					this.field
+				);
+				if (typeof fieldData !== "object") {
+					if (resolveContext.log)
+						resolveContext.log(
+							"Field '" +
+								this.field +
+								"' doesn't contain a valid alias configuration"
+						);
+					return callback();
+				}
+				const data1 = fieldData[innerRequest];
+				const data2 = fieldData[innerRequest.replace(/^\.\//, "")];
+				const data = typeof data1 !== "undefined" ? data1 : data2;
+				if (data === innerRequest) return callback();
+				if (data === undefined) return callback();
+				if (data === false) {
+					const ignoreObj = Object.assign({}, request, {
+						path: false
+					});
+					return callback(null, ignoreObj);
+				}
+				const obj = Object.assign({}, request, {
+					path: request.descriptionFileRoot,
+					request: data
+				});
+				resolver.doResolve(
+					target,
+					obj,
+					"aliased from description file " +
+						request.descriptionFilePath +
+						" with mapping '" +
+						innerRequest +
+						"' to '" +
+						data +
+						"'",
+					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);
+					}
+				);
+			});
+	}
+};