1 /*

     2  * Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.

     8  *

     9  * This code is distributed in the hope that it will be useful, but WITHOUT

    10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    12  * version 2 for more details (a copy is included in the LICENSE file that

    13  * accompanied this code).

    14  *

    15  * You should have received a copy of the GNU General Public License version

    16  * 2 along with this work; if not, write to the Free Software Foundation,

    17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    18  *

    19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    20  * or visit www.oracle.com if you need additional information or have any

    21  * questions.

    22  */

    23 

    24 import java.io.File;

    25 import java.nio.file.*;

    26 import java.util.*;

    27 

    28 import static jdk.test.lib.Asserts.*;

    29 import jdk.test.lib.JDKToolFinder;

    30 import jdk.test.lib.process.ProcessTools;

    31 

    32 /*

    33  * @test

    34  * @bug 8214230

    35  * @summary Test that jlinks generates reproducible modules files

    36  * @library /test/lib

    37  * @run driver JLinkReproducibleTest

    38  */

    39 public class JLinkReproducibleTest {

    40     private static void run(List<String> cmd) throws Exception {

    41         var pb = new ProcessBuilder(cmd.toArray(new String[0]));

    42         var res = ProcessTools.executeProcess(pb);

    43         res.shouldHaveExitValue(0);

    44     }

    45 

    46     private static void jlink(Path image) throws Exception {

    47         var cmd = new ArrayList<String>();

    48         cmd.add(JDKToolFinder.getJDKTool("jlink"));

    49         cmd.addAll(List.of(

    50             "--module-path", JMODS_DIR.toString() + File.pathSeparator + CLASS_DIR.toString(),

    51             "--add-modules", "main",

    52             "--compress=2",

    53             "--output", image.toString()

    54         ));

    55         run(cmd);

    56     }

    57 

    58     private static void javac(String... args) throws Exception {

    59         var cmd = new ArrayList<String>();

    60         cmd.add(JDKToolFinder.getJDKTool("javac"));

    61         cmd.addAll(Arrays.asList(args));

    62         run(cmd);

    63     }

    64 

    65     private static final List<String> MODULE_INFO = List.of(

    66         "module main {",

    67         "    exports org.test.main;",

    68         "}"

    69     );

    70 

    71     private static final List<String> MAIN_CLASS = List.of(

    72         "package org.test.main;",

    73         "public class Main {",

    74         "    public static void main(String[] args) {",

    75         "        System.out.println(\"Hello, world\");",

    76         "    }",

    77         "}"

    78     );

    79 

    80     private static final Path CLASS_DIR = Path.of("classes");

    81     private static final Path JMODS_DIR = Path.of(System.getProperty("java.home"), "jmods");

    82 

    83     public static void main(String[] args) throws Exception {

    84         // Write the source code

    85         var srcDir = Path.of("main", "org", "test", "main");

    86         Files.createDirectories(srcDir.toAbsolutePath());

    87 

    88         var srcFile = srcDir.resolve("Main.java");

    89         Files.write(srcFile, MAIN_CLASS);

    90 

    91         var moduleFile = Path.of("main").resolve("module-info.java");

    92         Files.write(moduleFile, MODULE_INFO);

    93 

    94         // Compile the source code to class files

    95         javac("--module-source-path", ".",

    96               "--module", "main",

    97               "-d", CLASS_DIR.toString());

    98 

    99         // Link the first image

   100         var firstImage = Path.of("image-first");

   101         jlink(firstImage);

   102         var firstModulesFile = firstImage.resolve("lib")

   103                                          .resolve("modules");

   104 

   105         // Link the second image

   106         var secondImage = Path.of("image-second");

   107         jlink(secondImage);

   108         var secondModulesFile = secondImage.resolve("lib")

   109                                            .resolve("modules");

   110 

   111         // Ensure module files are identical

   112         assertEquals(-1L, Files.mismatch(firstModulesFile, secondModulesFile));

   113     }

   114 }