chushihua

node_modules/enhanced-resolve/lib/SymlinkPlugin.js

@@ -0,0 +1,47 @@
+/*
+	MIT License http://www.opensource.org/licenses/mit-license.php
+	Author Tobias Koppers @sokra
+*/
+var getPaths = require("./getPaths");
+var forEachBail = require("./forEachBail");
+
+function SymlinkPlugin(source, target) {
+	this.source = source;
+	this.target = target;
+}
+module.exports = SymlinkPlugin;
+
+SymlinkPlugin.prototype.apply = function(resolver) {
+	var target = this.target;
+	resolver.plugin(this.source, function(request, callback) {
+		var _this = this;
+		var fs = _this.fileSystem;
+		var pathsResult = getPaths(request.path);
+		var pathSeqments = pathsResult.seqments;
+		var paths = pathsResult.paths;
+
+		var containsSymlink = false;
+		forEachBail.withIndex(paths, function(path, idx, callback) {
+			fs.readlink(path, function(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();
+			});
+		}, function(err, idx) {
+			if(!containsSymlink) return callback();
+			var resultSeqments = typeof idx === "number" ? pathSeqments.slice(0, idx + 1) : pathSeqments.slice();
+			var result = resultSeqments.reverse().reduce(function(a, b) {
+				return _this.join(a, b);
+			});
+			var obj = Object.assign({}, request, {
+				path: result
+			});
+			resolver.doResolve(target, obj, "resolved symlink to " + result, callback);
+		});
+	});
+};