/*

 * Copyright (c) 2019, Red Hat, Inc.

 * 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

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import java.io.File;

import java.io.PrintWriter;

import java.nio.file.Files;

import java.nio.file.Paths;

import java.nio.file.StandardOpenOption;

import java.util.Arrays;

import java.util.List;

import java.util.stream.Collectors;

/**

 * Fake objcopy used by StripNativeDebugSymbolsTest. It prints the

 * passed in arguments to a log and creates a fake debug info file

 * for --only-keep-debug invocation. Note that the first argument is

 * the path to the log file. This argument will be omitted when

 * logged.

 *

 * Callers need to ensure the log file is properly truncated.

 *

 */

public class FakeObjCopy {

    private static final String OBJCOPY_ONLY_KEEP_DEBUG_OPT = "--only-keep-debug";

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

        if (args.length < 1) {

            throw new AssertionError("At least one argument expected");

        }

        String[] objCopyArgs = new String[args.length - 1];

        System.arraycopy(args, 1, objCopyArgs, 0, objCopyArgs.length);

        String logFile = args[0];

        System.out.println("DEBUG: Fake objcopy called. Log file is: " + logFile);

        // Log options

        String line = Arrays.asList(objCopyArgs).stream().collect(Collectors.joining(" "));

        Files.write(Paths.get(logFile),

                    List.<String>of(line),

                    StandardOpenOption.APPEND,

                    StandardOpenOption.CREATE);

        // Handle --only-keep-debug option as plugin attempts to read

        // debug info file after this utility being called.

        if (objCopyArgs.length == 3 && OBJCOPY_ONLY_KEEP_DEBUG_OPT.equals(objCopyArgs[0])) {

            handleOnlyKeepDebug(objCopyArgs[2]);

        }

    }

    private static void handleOnlyKeepDebug(String dbgFile) throws Exception {

        try (PrintWriter pw = new PrintWriter(new File(dbgFile))) {

            pw.println("Fake objcopy debug info file");

        }

        System.out.println("DEBUG: wrote fake debug file " + dbgFile);

    }

}