--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/make/src/classes/build/tools/jigsaw/AddPackagesAttribute.java	Tue Oct 04 13:34:49 2016 +0200
@@ -0,0 +1,89 @@
+/*
+ * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package build.tools.jigsaw;
+
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.lang.module.ModuleFinder;
+import java.lang.module.ModuleReference;
+import java.nio.file.DirectoryStream;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.util.Optional;
+import java.util.Set;
+
+import jdk.internal.module.ModuleInfoExtender;
+
+/**
+ * Adds the Packages class file attribute to each module-info.class in an
+ * exploded build.
+ */
+
+public class AddPackagesAttribute {
+
+    public static void main(String[] args) throws IOException {
+
+        if (args.length != 1) {
+            System.err.println("Usage AddPackagesAttribute exploded-java-home");
+            System.exit(-1);
+        }
+
+        String home = args[0];
+        Path dir = Paths.get(home, "modules");
+
+        ModuleFinder finder = ModuleFinder.of(dir);
+
+        try (DirectoryStream<Path> stream = Files.newDirectoryStream(dir)) {
+            for (Path entry : stream) {
+                Path mi = entry.resolve("module-info.class");
+                if (Files.isRegularFile(mi)) {
+                    String mn = entry.getFileName().toString();
+                    Optional<ModuleReference> omref = finder.find(mn);
+                    if (omref.isPresent()) {
+                        Set<String> packages = omref.get().descriptor().conceals();
+                        addPackagesAttribute(mi, packages);
+                    }
+                }
+            }
+        }
+    }
+
+    static void addPackagesAttribute(Path mi, Set<String> packages) throws IOException {
+        byte[] bytes;
+        try (InputStream in = Files.newInputStream(mi)) {
+            ModuleInfoExtender extender = ModuleInfoExtender.newExtender(in);
+            extender.conceals(packages);
+            ByteArrayOutputStream baos = new ByteArrayOutputStream();
+            extender.write(baos);
+            bytes = baos.toByteArray();
+        }
+
+        Files.write(mi, bytes);
+    }
+
+}