update

node_modules/enhanced-resolve/lib/SymlinkPlugin.js

@@ -0,0 +1,64 @@
+/*
+	MIT License http://www.opensource.org/licenses/mit-license.php
+	Author Tobias Koppers @sokra
+*/
+"use strict";
+
+const getPaths = require("./getPaths");
+const forEachBail = require("./forEachBail");
+
+module.exports = class SymlinkPlugin {
+	constructor(source, target) {
+		this.source = source;
+		this.target = target;
+	}
+
+	apply(resolver) {
+		const target = resolver.ensureHook(this.target);
+		const fs = resolver.fileSystem;
+		resolver
+			.getHook(this.source)
+			.tapAsync("SymlinkPlugin", (request, resolveContext, callback) => {
+				const pathsResult = getPaths(request.path);
+				const pathSeqments = pathsResult.seqments;
+				const paths = pathsResult.paths;
+
+				let containsSymlink = false;
+				forEachBail.withIndex(
+					paths,
+					(path, idx, callback) => {
+						fs.readlink(path, (err, result) => {
+							if (!err && result) {
+								pathSeqments[idx] = result;
+								containsSymlink = true;
+								// Shortcut when absolute symlink found
+								if (/^(\/|[a-zA-Z]:($|\\))/.test(result))
+									return callback(null, idx);
+							}
+							callback();
+						});
+					},
+					(err, idx) => {
+						if (!containsSymlink) return callback();
+						const resultSeqments =
+							typeof idx === "number"
+								? pathSeqments.slice(0, idx + 1)
+								: pathSeqments.slice();
+						const result = resultSeqments.reverse().reduce((a, b) => {
+							return resolver.join(a, b);
+						});
+						const obj = Object.assign({}, request, {
+							path: result
+						});
+						resolver.doResolve(
+							target,
+							obj,
+							"resolved symlink to " + result,
+							resolveContext,
+							callback
+						);
+					}
+				);
+			});
+	}
+};