/*
 * 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));
        }
    }
}