1 /* 2 * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * - Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 11 * - Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * - Neither the name of Oracle nor the names of its 16 * contributors may be used to endorse or promote products derived 17 * from this software without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS 20 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 21 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR 23 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 24 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 25 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 26 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 27 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 28 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 29 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 // __proto__ magic property is non-standard. Use Object.getPrototypeOf 33 // and Object.setPrototypeOf instead. This script finds __proto__ 34 // usage in scripts a given directory (recursively). If no directory 35 // is specified the current working directory is scanned for scripts. 36 37 if (arguments.length == 0) { 38 arguments[0] = "."; 39 } 40 41 var File = Java.type("java.io.File"); 42 if (! new File(arguments[0]).isDirectory()) { 43 print(arguments[0] + " is not a directory"); 44 exit(1); 45 } 46 47 var Files = Java.type("java.nio.file.Files"); 48 var Parser = Java.type("jdk.nashorn.api.tree.Parser"); 49 var SimpleTreeVisitor = Java.type("jdk.nashorn.api.tree.SimpleTreeVisitorES5_1"); 50 51 var parser = Parser.create("-scripting", "--const-as-var"); 52 var protoFound = false; 53 54 function checkFile(file) { 55 // print("checking " + file); 56 var ast = parser.parse(file, print); 57 if (!ast) { 58 return; 59 } 60 61 // locate __proto__ usage and warn 62 ast.accept(visitor = new (Java.extend(SimpleTreeVisitor)) { 63 lineMap: null, 64 65 printWarning: function(node) { 66 var pos = node.startPosition; 67 var line = this.lineMap.getLineNumber(pos); 68 var column = this.lineMap.getColumnNumber(pos); 69 print("WARNING: __proto__ usage in " + file + " @ " + line + ":" + column); 70 }, 71 72 checkProto: function(node, name) { 73 if (name == "__proto__") { 74 protoFound = true; 75 this.printWarning(node); 76 } 77 }, 78 79 visitCompilationUnit: function(node, extra) { 80 this.lineMap = node.lineMap; 81 Java.super(visitor).visitCompilationUnit(node, extra); 82 }, 83 84 visitIdentifier: function(node, extra) { 85 this.checkProto(node, node.name); 86 Java.super(visitor).visitIdentifier(node, extra); 87 }, 88 89 visitMemberSelect: function(node, extra) { 90 this.checkProto(node, node.identifier); 91 Java.super(visitor).visitMemberSelect(node, extra); 92 }, 93 94 visitProperty: function(node, extra) { 95 this.checkProto(node, node.key); 96 Java.super(visitor).visitProperty(node, extra); 97 } 98 }, null); 99 } 100 101 Files.walk(new File(arguments[0]).toPath()) 102 .filter(function(p) Files.isRegularFile(p)) 103 .filter(function(p) p.toFile().name.endsWith('.js')) 104 .forEach(checkFile); 105 106 if (protoFound) { 107 print("__proto__ is non-standard. Use Object.get/setPrototypeOf instead"); 108 }