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 // delete of scope vars is reported as error in strict mode.

    33 // This script finds scripts that such deletes. Scripts in

    34 // the specified directory are scanned. If no directory is 

    35 // specified, the current directory is scanned.

    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 directory nor a file");

    45     exit(1);

    46 }

    47 

    48 var Files = Java.type("java.nio.file.Files");

    49 var IdentifierTree = Java.type("jdk.nashorn.api.tree.IdentifierTree");

    50 var Parser = Java.type("jdk.nashorn.api.tree.Parser");

    51 var SimpleTreeVisitor = Java.type("jdk.nashorn.api.tree.SimpleTreeVisitorES5_1");

    52 var Tree = Java.type("jdk.nashorn.api.tree.Tree");

    53 

    54 var parser = Parser.create("-scripting", "--const-as-var");

    55 

    56 function checkFile(file) {

    57     // print("checking " + file);

    58     var ast = parser.parse(file, print);

    59     if (!ast) {

    60         return;

    61     }

    62 

    63     // locate __proto__ usage and warn

    64     ast.accept(visitor = new (Java.extend(SimpleTreeVisitor)) {

    65         lineMap: null,

    66 

    67         printWarning: function(node, varName) {

    68             var pos = node.startPosition;

    69             var line = this.lineMap.getLineNumber(pos);

    70             var column = this.lineMap.getColumnNumber(pos);

    71             print("WARNING: delete " + varName + " in " + file + " @ " + line + ":" + column);

    72         },

    73 

    74         visitCompilationUnit: function(node, extra) {

    75             this.lineMap = node.lineMap;

    76             Java.super(visitor).visitCompilationUnit(node, extra);

    77         },

    78 

    79         visitUnary: function(node, extra) {

    80             if (node.kind == Tree.Kind.DELETE &&

    81                 node.expression instanceof IdentifierTree) {

    82                 this.printWarning(node, node.expression.name);

    83             } 

    84             Java.super(visitor).visitUnary(node, extra);

    85         },

    86 

    87     }, null);

    88 }

    89 

    90 if (file.isDirectory()) {

    91     Files.walk(file.toPath())

    92         .filter(function(p) Files.isRegularFile(p))

    93         .filter(function(p) p.toFile().name.endsWith('.js'))

    94         .forEach(checkFile);

    95 } else {

    96     checkFile(file);

    97 }