/*

 * Copyright (c) 2015, 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.

 *

 * 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.

 */

import java.io.File;

import java.io.PrintStream;

import java.lang.instrument.Instrumentation;

import java.util.Arrays;

public class Agent {

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

        String jarName = args[0];

        String className = args[1];

        String manifestName = "manifest.mf";

        System.out.println("Creating "+manifestName);

        try (PrintStream out = new PrintStream(new File(manifestName))) {

            out.println("Premain-Class: " + className);

            out.println("Can-Redefine-Classes: true");

        }

        System.out.println("Building "+jarName);

        String[] jarArgs = new String[] {"-cfm", jarName, manifestName };

        System.out.println("Running jar " + Arrays.toString(jarArgs));

        sun.tools.jar.Main jarTool = new sun.tools.jar.Main(System.out, System.err, "jar");

        if (!jarTool.run(jarArgs)) {

            throw new Error("jar failed: args=" + Arrays.toString(args));

        }

    }

}