update

node_modules/enhanced-resolve/lib/ModulesInHierachicDirectoriesPlugin.js

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+/*
+	MIT License http://www.opensource.org/licenses/mit-license.php
+	Author Tobias Koppers @sokra
+*/
+"use strict";
+
+const forEachBail = require("./forEachBail");
+const getPaths = require("./getPaths");
+
+module.exports = class ModulesInHierachicDirectoriesPlugin {
+	constructor(source, directories, target) {
+		this.source = source;
+		this.directories = [].concat(directories);
+		this.target = target;
+	}
+
+	apply(resolver) {
+		const target = resolver.ensureHook(this.target);
+		resolver
+			.getHook(this.source)
+			.tapAsync(
+				"ModulesInHierachicDirectoriesPlugin",
+				(request, resolveContext, callback) => {
+					const fs = resolver.fileSystem;
+					const addrs = getPaths(request.path)
+						.paths.map(p => {
+							return this.directories.map(d => resolver.join(p, d));
+						})
+						.reduce((array, p) => {
+							array.push.apply(array, p);
+							return array;
+						}, []);
+					forEachBail(
+						addrs,
+						(addr, callback) => {
+							fs.stat(addr, (err, stat) => {
+								if (!err && stat && stat.isDirectory()) {
+									const obj = Object.assign({}, request, {
+										path: addr,
+										request: "./" + request.request
+									});
+									const message = "looking for modules in " + addr;
+									return resolver.doResolve(
+										target,
+										obj,
+										message,
+										resolveContext,
+										callback
+									);
+								}
+								if (resolveContext.log)
+									resolveContext.log(
+										addr + " doesn't exist or is not a directory"
+									);
+								if (resolveContext.missing) resolveContext.missing.add(addr);
+								return callback();
+							});
+						},
+						callback
+					);
+				}
+			);
+	}
+};