KCauldron-minecraft-server/src/main/java/kcauldron/KCauldron.java

package kcauldron;

import java.io.File;
import java.net.URL;
import java.net.URLDecoder;
import java.util.Enumeration;
import java.util.Properties;

import org.spigotmc.RestartCommand;

public class KCauldron {
    private static boolean sManifestParsed = false;

    private static void parseManifest() {
    	if (sManifestParsed)
    		return;
    	sManifestParsed = true;

    	try {
    		Enumeration<URL> resources = KCauldron.class.getClassLoader()
    				.getResources("META-INF/MANIFEST.MF");
    		Properties manifest = new Properties();
    		while (resources.hasMoreElements()) {
    			URL url = resources.nextElement();
    			manifest.load(url.openStream());
    			String version = manifest.getProperty("KCauldron-Version");
    			if (version != null) {
    				String path = url.getPath();
    				String jarFilePath = path.substring(path.indexOf(":") + 1,
    						path.indexOf("!"));
    				jarFilePath = URLDecoder.decode(jarFilePath, "UTF-8");
    				sServerLocation = new File(jarFilePath);

    				sCurrentVersion = version;
    				sGroup = manifest.getProperty("KCauldron-Group");
    				sBranch = manifest.getProperty("KCauldron-Branch");
    				sChannel = manifest.getProperty("KCauldron-Channel");
    				break;
    			}
    			manifest.clear();
    		}
    	} catch (Exception e) {
    		e.printStackTrace();
    	}
    }

    private static String sCurrentVersion;

    public static String getCurrentVersion() {
    	parseManifest();
    	return sCurrentVersion;
    }

    private static File sServerLocation;

    public static File getServerLocation() {
    	parseManifest();
    	return sServerLocation;
    }
    
    private static File sServerHome;
    
    public static File getServerHome() {
    	if (sServerHome == null) {
    		String home = System.getenv("KCAULDRON_HOME");
    		if (home != null) {
    			sServerHome = new File(home);
    		} else {
    			parseManifest();
    			sServerHome = sServerLocation.getParentFile();
    		}
    	}
    	return sServerHome;
    }

    private static String sGroup;

    public static String getGroup() {
    	parseManifest();
    	return sGroup;
    }

    private static String sBranch;

    public static String getBranch() {
    	parseManifest();
    	return sBranch;
    }

    private static String sChannel;

    public static String getChannel() {
    	parseManifest();
    	return sChannel;
    }

    public static File sNewServerLocation;
    public static String sNewServerVersion;
    public static boolean sUpdateInProgress;

    public static void restart() {
    	RestartCommand.restart(true);
    }
}