SelfUpdate.java

/*
 * This file is part of FTB Launcher.
 *
 * Copyright © 2012-2016, FTB Launcher Contributors <https://github.com/Slowpoke101/FTBLaunch/>
 * FTB Launcher is licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package net.ftb.updater;

import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

import com.google.common.collect.Lists;

import net.ftb.log.Logger;
import net.ftb.util.FTBFileUtils;
import net.ftb.util.OSUtils;

public class SelfUpdate
{
	public static void runUpdate (String currentPath, String temporaryUpdatePath)
	{
		List<String> arguments = Lists.newArrayList();

		String separator = System.getProperty("file.separator");
		String path = System.getProperty("java.home") + separator + "bin" + separator + "java";
		arguments.add(path);
		arguments.add("-cp");
		arguments.add(temporaryUpdatePath);
		arguments.add(SelfUpdate.class.getCanonicalName());
		arguments.add(currentPath);
		arguments.add(temporaryUpdatePath);

		Logger.logInfo("Would update with: " + arguments);
		Logger.logInfo("current: " + currentPath);
		Logger.logInfo("new: " + temporaryUpdatePath);
		ProcessBuilder processBuilder = new ProcessBuilder();
		processBuilder.command(arguments);
		try
		{
			processBuilder.start();
		}
		catch (IOException e)
		{
			Logger.logError("Failed to start self-update process", e);
		}
		System.exit(0);
	}

	public static void main (String[] args)
	{
		try
		{
			if (OSUtils.getCurrentOS() != OSUtils.OS.UNIX)
			{
				Thread.sleep(4000);// why is this here???
			}
		}
		catch (InterruptedException ignored)
		{}
		String launcherPath = args[0];
		String temporaryUpdatePath = args[1];
		File launcher = new File(launcherPath);
		File temporaryUpdate = new File(temporaryUpdatePath);
		try
		{
			FTBFileUtils.delete(launcher);
			FTBFileUtils.copyFile(temporaryUpdate, launcher);
			launcher.setExecutable(true);
		}
		catch (IOException e)
		{
			Logger.logError("Auto Updating Failed", e);
		}

		List<String> arguments = new ArrayList<String>();

		String separator = System.getProperty("file.separator");
		String path = System.getProperty("java.home") + separator + "bin" + separator + "java";
		arguments.add(path);
		arguments.add("-jar");
		arguments.add(launcherPath);

		ProcessBuilder processBuilder = new ProcessBuilder();
		processBuilder.command(arguments);
		try
		{
			processBuilder.start();
		}
		catch (IOException e)
		{
			Logger.logError("Failed to start launcher process after updating", e);
		}
	}
}