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 var file = new File(arguments[0]); 43 if (!file.exists()) { 44 print(arguments[0] + " is neither a file nor a directory"); 45 exit(1); 46 } 47 48 var Files = Java.type("java.nio.file.Files"); 49 var Parser = Java.type("jdk.nashorn.api.tree.Parser"); 50 var SimpleTreeVisitor = Java.type("jdk.nashorn.api.tree.SimpleTreeVisitorES5_1"); 51 52 var parser = Parser.create("-scripting", "--const-as-var"); 53 var protoFound = false; 54 55 function checkFile(file) { 56 // print("checking " + file); 57 var ast = parser.parse(file, print); 58 if (!ast) { 59 return; 60 } 61 62 // locate __proto__ usage and warn 63 ast.accept(visitor = new (Java.extend(SimpleTreeVisitor)) { 64 lineMap: null, 65 66 printWarning: function(node) { 67 var pos = node.startPosition; 68 var line = this.lineMap.getLineNumber(pos); 69 var column = this.lineMap.getColumnNumber(pos); 70 print("WARNING: __proto__ usage in " + file + " @ " + line + ":" + column); 71 }, 72 73 checkProto: function(node, name) { 74 if (name == "__proto__") { 75 protoFound = true; 76 this.printWarning(node); 77 } 78 }, 79 80 visitCompilationUnit: function(node, extra) { 81 this.lineMap = node.lineMap; 82 Java.super(visitor).visitCompilationUnit(node, extra); 83 }, 84 85 visitIdentifier: function(node, extra) { 86 this.checkProto(node, node.name); 87 Java.super(visitor).visitIdentifier(node, extra); 88 }, 89 90 visitMemberSelect: function(node, extra) { 91 this.checkProto(node, node.identifier); 92 Java.super(visitor).visitMemberSelect(node, extra); 93 }, 94 95 visitProperty: function(node, extra) { 96 this.checkProto(node, node.key); 97 Java.super(visitor).visitProperty(node, extra); 98 } 99 }, null); 100 } 101 102 if (file.isDirectory()) { 103 Files.walk(file.toPath()) 104 .filter(function(p) Files.isRegularFile(p)) 105 .filter(function(p) p.toFile().name.endsWith('.js')) 106 .forEach(checkFile); 107 } else { 108 checkFile(file); 109 } 110 111 if (protoFound) { 112 print("__proto__ is non-standard. Use Object.get/setPrototypeOf instead"); 113 }