Deprecate installer & use KBootstrap for updating

2015-06-16 23:30:52 +07:00 · 2015-06-16 23:30:52 +07:00 · 01acbd4779
commit 01acbd4779
parent 44020ecc25
10 changed files with 298 additions and 208 deletions
--- a/build.gradle
+++ b/build.gradle
@ -20,6 +20,11 @@ buildscript {
    }
 }

+repositories {
+    maven { url 'https://prok.pw/repo' }
+    jcenter()
+}
+
 tasks.whenTaskAdded {
    if (it.name.startsWith('publish')) it.dependsOn 'preparePublication'
 }
@ -35,15 +40,6 @@ minecraft {
    mainClass = 'cpw.mods.fml.relauncher.ServerLaunchWrapper'
    tweakClass = 'cpw.mods.fml.common.launcher.FMLTweaker'
    installerVersion = "1.4"
-    subprojects {
-        repositories {
-            mavenCentral()
-            maven {
-                name = "sonatype"
-                url = "https://oss.sonatype.org/content/repositories/snapshots/"
-            }
-        }
-    }
    srgExtra "PK: org/bukkit/craftbukkit org/bukkit/craftbukkit/v1_7_R4"
 }

@ -98,70 +94,148 @@ launch4j {
    jreMinVersion = '1.6.0'
 }

-tasks.packageUniversal {
-    classifier = 'server'
-    manifest.attributes([
+configurations {
+    compile.extendsFrom exported
+    libraries
+    bootstrap
+}
+
+dependencies {
+    bootstrap 'pw.prok:KBootstrap:0.0.9+'
+
+    libraries 'net.minecraft:launchwrapper:1.11'
+    libraries 'org.ow2.asm:asm-all:5.0.3'
+    libraries 'com.typesafe.akka:akka-actor_2.11:2.3.3'
+    libraries 'com.typesafe:config:1.2.1'
+    libraries 'org.scala-lang:scala-actors-migration_2.11:1.1.0'
+    libraries 'org.scala-lang:scala-compiler:2.11.1'
+    libraries 'org.scala-lang.plugins:scala-continuations-library_2.11:1.0.2'
+    libraries 'org.scala-lang.plugins:scala-continuations-plugin_2.11.1:1.0.2'
+    libraries 'org.scala-lang:scala-library:2.11.1'
+    libraries 'org.scala-lang:scala-parser-combinators_2.11:1.0.1'
+    libraries 'org.scala-lang:scala-reflect:2.11.1'
+    libraries 'org.scala-lang:scala-swing_2.11:1.0.1'
+    libraries 'org.scala-lang:scala-xml_2.11:1.0.2'
+    libraries 'net.sf.jopt-simple:jopt-simple:4.5'
+    libraries 'lzma:lzma:0.0.1'
+    libraries 'net.sf.jopt-simple:jopt-simple:4.5'
+    libraries 'org.yaml:snakeyaml:1.9'
+    libraries 'commons-lang:commons-lang:2.6'
+    libraries 'org.avaje:ebean:2.7.3'
+    libraries 'jline:jline:2.6'
+    libraries 'net.md-5:SpecialSource:1.7-SNAPSHOT'
+    libraries 'net.sourceforge.argo:argo:2.25'
+    libraries 'org.fusesource.jansi:jansi:1.8'
+    libraries 'com.googlecode.json-simple:json-simple:1.1'
+    libraries 'org.xerial:sqlite-jdbc:3.7.2'
+    libraries 'mysql:mysql-connector-java:5.1.14'
+    libraries 'javax.persistence:persistence-api:1.0.2'
+    libraries 'net.minecraft:server:1.7.10'
+    libraries 'pw.prok:KImagine:0.1.12@jar'
+    libraries 'org.apache.httpcomponents:httpclient:4.4.1'
+}
+
+packageUniversal {
+    from { configurations.exported.collect { it.isDirectory() ? it : zipTree(it) } }
+}
+
+def String repeat(String string, int times) {
+    StringBuilder builder = new StringBuilder(string.length() * times)
+    times.times { builder.append(string) }
+    builder as String
+}
+
+def generateClasspath(boolean legacy = false) {
+    def classpath = ''
+    configurations.libraries.resolvedConfiguration.resolvedArtifacts.collect { it.moduleVersion.id }.each {
+        def jar = "${it.group.replace('.', '/')}/${it.name}/${it.version}/${it.name}-${it.version}.jar"
+        classpath += " ${legacy ? 'libraries/' : repeat('../', (group as String).split('\\.').length + 2)}${jar}"
+    }
+    return classpath.trim()
+}
+
+def generateManifest(boolean legacy = false) {
+    [
            'KCauldron-Git-Branch'  : gitInfo('branch'),
            'KCauldron-Git-Hash'    : gitInfo('fullHash'),
            'KCauldron-Version'     : project.version,
            'KCauldron-Channel'     : project.name,
+            'KCauldron-Legacy'      : legacy,
            'Implementation-Vendor' : 'Prototik',
            'Implementation-Title'  : project.name,
            'Implementation-Version': project.version,
-            'Forge-Version'         : '10.13.3.1448',
            'Specification-Vendor'  : 'Bukkit Team',
            'Specification-Title'   : 'Bukkit',
-            'Specification-Version' : '1.7.10-R0.1-SNAPSHOT'
-    ])
+            'Specification-Version' : '1.7.10-R0.1-SNAPSHOT',
+            'Forge-Version'         : '10.13.3.1448',
+            'TweakClass'            : 'cpw.mods.fml.common.launcher.FMLTweaker',
+            'Main-Class'            : 'cpw.mods.fml.relauncher.ServerLaunchWrapper',
+            'Class-Path'            : generateClasspath(legacy)
+    ]
+}
+
+tasks.packageUniversal {
+    classifier = 'server'
+    setManifest {}
+    manifest.attributes(generateManifest(true))
+}
+
+task jar(type: Jar, dependsOn: packageUniversal) {
+    destinationDir file("${buildDir}/distributions")
+    from zipTree(tasks.packageUniversal.archivePath)
+    manifest.attributes(generateManifest())
 }

 tasks.createChangelog.onlyIf { false }
+tasks.packageInstaller.onlyIf { false }

 task packageChangelog(type: CreateChangelog) {
    onlyIf { project.hasProperty('officialBuild') }
    classifier = 'changelog'
    extension = 'txt'
-    oldChangelogUrl = "https://prok.pw/repo/${project.group.replace('.','/')}/${project.name}/${buildInfo('version')}/${project.name}-${buildInfo('version')}-changelog.txt"
+    oldChangelogUrl = "https://prok.pw/repo/${project.group.replace('.', '/')}/${project.name}/${buildInfo('version')}/${project.name}-${buildInfo('version')}-changelog.txt"
    hash = gitInfo('hash')
    message = gitInfo('message')
    version = project.version
 }

-task installBundle(type: InstallBundle, dependsOn: packageInstaller) {
-    installer packageInstaller.archivePath
+task installBundle(type: InstallBundle, dependsOn: packageUniversal) {
+    serverJar tasks.jar.archivePath
+    bootstrapClasspath configurations.bootstrap
+    bootstrapMain 'pw.prok.bootstrap.Main'
 }

 task packageBundle(type: Zip, dependsOn: installBundle) {
    onlyIf { project.hasProperty('officialBuild') }
    classifier = 'bundle'
-	from packageInstaller
-	from packageUniversal
-    from fileTree(installBundle.installLocation, {
-        include 'libraries/**'
-        include 'minecraft_server.*.jar'
-    })
+    from fileTree(installBundle.installLocation)
 }

-task signJars(type: Sign, dependsOn: [packageUniversal, packageInstaller, packageChangelog, packageBundle]) {
-    sign packageInstaller
+task signJars(type: Sign, dependsOn: [packageUniversal, packageChangelog, packageBundle, jar, 'generatePomFileForMavenPublication']) {
    sign packageUniversal
    sign packageChangelog
    sign packageBundle
+    sign jar
 }

-task preparePublication(dependsOn: signJars) {}
+task signPom(type: Sign, dependsOn: 'generatePomFileForMavenPublication') {
+	outputs.upToDateWhen { false }
+    sign file("${buildDir}/publications/maven/pom-default.xml")
+}
+
+task preparePublication(dependsOn: [signJars, signPom]) {}

 def getSignatureFiles = {
    def allFiles = project.tasks.signJars.signatureFiles.collect { it }
    def signedServer = allFiles.find { it.name.contains('-server') }
-    def signedInstaller = allFiles.find { it.name.contains('-installer') }
    def signedChangelog = allFiles.find { it.name.contains('-changelog') }
    def signedBundle = allFiles.find { it.name.contains('-bundle') }
+    def signedJar = (allFiles - [signedServer, signedChangelog, signedBundle])[0]
    return [
            [archive: signedServer, classifier: 'server', extension: 'jar.asc'],
-            [archive: signedInstaller, classifier: 'installer', extension: 'jar.asc'],
            [archive: signedChangelog, classifier: 'changelog', extension: 'txt.asc'],
-            [archive: signedBundle, classifier: 'bundle', extension: 'jar.asc']
+            [archive: signedBundle, classifier: 'bundle', extension: 'jar.asc'],
+            [archive: signedJar, classifier: null, extension: 'jar.asc']
    ]
 }

@ -186,13 +260,17 @@ publishing {
                }
            }
            artifact packageUniversal
-            artifact packageInstaller
            artifact packageChangelog
            artifact packageBundle
+            artifact jar
        }
    }
 }

+tasks.buildPackages {
+    dependsOn packageUniversal, packageChangelog, packageBundle, jar
+}
+
 tasks.generateProjectCauldron << {
    def file = new File('eclipse/cauldron/build.gradle')
    file.append('''
@ -202,27 +280,12 @@ repositories {
 	}
 }
 dependencies {
-	compile 'pw.prok:KImagine:0.1.12+@jar'
-	compile 'org.apache.httpcomponents:httpclient:4.4.1'
-}
 ''')
-}
-
-configurations {
-    compile.extendsFrom exported
-}
-
-repositories {
-    maven {
-        url 'https://prok.pw/repo'
+    configurations.libraries.resolvedConfiguration.resolvedArtifacts.collect { it.moduleVersion.id }.each { module ->
+        if (['net.minecraft:server:', 'org.ow2.asm:asm-all'].findAll {(module as String).startsWith it}.size() > 0) {
+            return
        }
-}
-
-dependencies {
-    exported 'pw.prok:KImagine:0.1.12+@jar'
-    exported 'org.apache.httpcomponents:httpclient:4.4.1'
-}
-
-packageUniversal {
-    from { configurations.exported.collect { it.isDirectory() ? it : zipTree(it) } }
+        file.append("    compile '${module}'\n")
+    }
+    file.append('}')
 }
--- a/buildSrc/src/main/groovy/kcauldron/InstallBundle.groovy
+++ b/buildSrc/src/main/groovy/kcauldron/InstallBundle.groovy
@ -2,14 +2,26 @@ package kcauldron

 import org.gradle.api.DefaultTask
 import org.gradle.api.GradleException
-import org.gradle.api.tasks.InputFile
-import org.gradle.api.tasks.OutputDirectory
-import org.gradle.api.tasks.TaskAction
-import org.gradle.api.tasks.incremental.IncrementalTaskInputs
+import org.gradle.api.file.ConfigurableFileCollection
+import org.gradle.api.tasks.*

 class InstallBundle extends DefaultTask {
    @InputFile
-    def File installer
+    def File serverJar
+
+    @InputFiles
+    def ConfigurableFileCollection bootstrapClasspath
+
+    @Input
+    def String bootstrapMain
+
+    InstallBundle() {
+        bootstrapClasspath = project.files()
+    }
+
+    def bootstrapClasspath(Object... args) {
+        bootstrapClasspath.from args
+    }

    @OutputDirectory
    def File getInstallLocation() {
@ -20,14 +32,40 @@ class InstallBundle extends DefaultTask {
    def install() {
        installLocation.deleteDir()
        installLocation.mkdirs()
+        new File(installLocation, "README.txt").withWriter {
+            def String jarPath = 'bin/' << (project.group as String).replace('.', File.separator) << File.separator << project.name << File.separator << project.version << File.separator << project.name << '-' << project.version << '.jar'
+
+            it << '''KCauldron installation guide
+
+# Understanding this bundle
+You're reading this guide because you're using deprecated installation method
+If you want use easier & safer method please read about KBootstrap at https://prok.pw/KBootstrap
+
+# Installation and usage
+1. Unpack this zip into server directory
+2. Use following line to start the server:
+  java -jar '''
+            it << jarPath
+            it << '''
+3. That's end, enjoy
+
+# Why I should use KBootstrap?
+1. Easiest server installation
+2. Built-in libraries management
+3. Update & run server in one line
+4. Ability to not read this boring guide
+5. What else?
+If you are not yet convinced and want to use bundles instead KBootstrap... Meh, this is your choice.
+'''
+        }
+        def cp = bootstrapClasspath
        for (int i = 0; i < 3; i++) {
-            def result = project.javaexec {
+            def result = project.javaexec { it ->
                workingDir installLocation
-                classpath installer
-                main 'net.minecraftforge.installer.SimpleInstaller'
-                args '--installServer'
-                standardOutput new NopOutputStream()
-                errorOutput new NopOutputStream()
+                classpath cp
+                main bootstrapMain
+                args '--serverDir', installLocation.canonicalPath,
+                        '--installServer', serverJar.canonicalFile
            }
            if (result.exitValue == 0) return
        }
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@ -1,6 +1,6 @@
-#Fri May 08 13:12:57 KRAT 2015
+#Tue Jun 16 17:21:00 KRAT 2015
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-2.4-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-2.4-all.zip
--- a/src/main/java/kcauldron/KCauldron.java
+++ b/src/main/java/kcauldron/KCauldron.java
@ -34,13 +34,17 @@ public class KCauldron {
 					sCurrentVersion = version;
 					sBranch = manifest.getProperty("KCauldron-Branch");
 					sChannel = manifest.getProperty("KCauldron-Channel");
+					break;
 				}
 				manifest.clear();
 			}
 		} catch (Exception e) {
 			e.printStackTrace();
 		}
-
+		String home = System.getenv("KCAULDRON_HOME");
+		if (home != null) {
+			sServerLocation = new File(home);
+		}
 	}

 	private static String sCurrentVersion;
--- a/src/main/java/kcauldron/KCauldronCommand.java
+++ b/src/main/java/kcauldron/KCauldronCommand.java
@ -62,8 +62,8 @@ public class KCauldronCommand extends Command {
 			if (!testPermission(sender, CHECK))
 				return true;
 			sender.sendMessage(ChatColor.GREEN + "Initiated version check...");
-			new KVersionRetriever(new CommandSenderUpdateCallback(sender),
-					false);
+			KVersionRetriever.startServer(new CommandSenderUpdateCallback(
+					sender), false);
 		} else if ("update".equals(action)) {
 			KCauldronUpdater.initUpdate(sender, args.length > 1 ? args[1]
 					: null);
--- a/src/main/java/kcauldron/KCauldronConfig.java
+++ b/src/main/java/kcauldron/KCauldronConfig.java
@ -13,18 +13,14 @@ public class KCauldronConfig extends ConfigBase {
 			true, "Enable KCauldron command");
 	public BoolSetting updatecheckerEnable = new BoolSetting(this,
 			"updatechecker.enable", true, "Enable KCauldron update checker");
-	public BoolSetting updatecheckerDeleteOld = new BoolSetting(this,
-			"updatechecker.deleteOld", true, "Delete old version after update");
 	public StringSetting updatecheckerSymlinks = new StringSetting(this,
-			"updatechecker.symlinks", "", "(Re)create symlinks after update");
+			"updatechecker.symlinks", "KCauldron.jar", "(Re)create symlinks after update");
 	public BoolSetting updatecheckerAutoinstall = new BoolSetting(this,
 			"updatechecker.autoinstall", false, "Install updates without confirming");
 	public BoolSetting updatecheckerAutorestart = new BoolSetting(this,
 			"updatechecker.autorestart", false, "Restart server after updating without confirming (set restart script in spigot.yml)");
 	public BoolSetting updatecheckerQuite = new BoolSetting(this,
 			"updatechecker.quite", false, "Print less info during update");
-	public StringSetting updatecheckerInstallAs = new StringSetting(this,
-			"updatechecker.installAs", "", "Install new version with specified name");

 	public BoolSetting loggingMaterialInjection = new BoolSetting(this,
 			"logging.materialInjection", false, "Log material injection event");
@ -33,12 +29,10 @@ public class KCauldronConfig extends ConfigBase {
 		super("kcauldron.yml", "kc");
 		register(commandEnable);
 		register(updatecheckerEnable);
-		register(updatecheckerDeleteOld);
 		register(updatecheckerSymlinks);
 		register(updatecheckerAutoinstall);
 		register(updatecheckerAutorestart);
 		register(updatecheckerQuite);
-		register(updatecheckerInstallAs);
 		register(loggingMaterialInjection);
 		load();
 	}
--- a/src/main/java/kcauldron/updater/CommandSenderUpdateCallback.java
+++ b/src/main/java/kcauldron/updater/CommandSenderUpdateCallback.java
@ -3,6 +3,7 @@ package kcauldron.updater;
 import java.lang.ref.Reference;
 import java.lang.ref.WeakReference;

+import kcauldron.KCauldron;
 import kcauldron.updater.KVersionRetriever.IVersionCheckCallback;

 import org.bukkit.ChatColor;
@ -20,32 +21,33 @@ public class CommandSenderUpdateCallback implements IVersionCheckCallback {
 	}

 	@Override
-	public void upToDate(String version) {
+	public void upToDate() {
 		CommandSender sender = mSender.get();
 		if (sender != null) {
 			sender.sendMessage(ChatColor.GREEN
-					+ "Running version of KCauldron is up-to-date: " + version);
+					+ "Running version of KCauldron is up-to-date: "
+					+ KCauldron.getCurrentVersion());
 		}
-		DefaultUpdateCallback.INSTANCE.upToDate(version);
+		DefaultUpdateCallback.INSTANCE.upToDate();
 	}

 	@Override
-	public void newVersion(String currentVersion, String newVersion) {
+	public void newVersion(String newVersion) {
 		CommandSender sender = mSender.get();
 		if (sender != null) {
-			newVersion(sender, currentVersion, newVersion);
+			newVersion(sender, KCauldron.getCurrentVersion(), newVersion);
 		}
-		DefaultUpdateCallback.INSTANCE.newVersion(currentVersion, newVersion);
+		DefaultUpdateCallback.INSTANCE.newVersion(newVersion);
 	}

-	public static void newVersion(CommandSender sender, String currentVersion, String newVersion) {
+	public static void newVersion(CommandSender sender, String currentVersion,
+			String newVersion) {
 		sender.sendMessage(new String[] {
 				ChatColor.YELLOW + "Found new version of KCauldron: "
 						+ newVersion,
 				ChatColor.YELLOW + "Current is " + currentVersion,
-				ChatColor.YELLOW + "Type '" + ChatColor.BLUE
-						+ "/kc update" + ChatColor.YELLOW
-						+ "' to update" });
+				ChatColor.YELLOW + "Type '" + ChatColor.BLUE + "/kc update"
+						+ ChatColor.YELLOW + "' to update" });
 	}

 	@Override
--- a/src/main/java/kcauldron/updater/DefaultUpdateCallback.java
+++ b/src/main/java/kcauldron/updater/DefaultUpdateCallback.java
@ -41,15 +41,15 @@ public class DefaultUpdateCallback implements IVersionCheckCallback {
 	}

 	@Override
-	public void upToDate(String version) {
+	public void upToDate() {
 		mHasUpdate = false;
-		mCurrentVersion = version;
+		mCurrentVersion = KCauldron.getCurrentVersion();
 		mNewVersion = null;
 	}

 	@Override
-	public void newVersion(String currentVersion, String newVersion) {
-		mCurrentVersion = currentVersion;
+	public void newVersion(String newVersion) {
+		mCurrentVersion = KCauldron.getCurrentVersion();
 		mNewVersion = newVersion;
 		if (!mHasUpdate) {
 			Bukkit.getConsoleSender().sendMessage(
--- a/src/main/java/kcauldron/updater/KCauldronUpdater.java
+++ b/src/main/java/kcauldron/updater/KCauldronUpdater.java
@ -1,10 +1,14 @@
 package kcauldron.updater;

 import java.io.File;
+import java.io.IOException;
 import java.io.InputStream;
 import java.nio.file.Files;
+import java.util.ArrayList;
+import java.util.List;

 import kcauldron.KCauldron;
+import kcauldron.updater.KVersionRetriever.IVersionCheckCallback;
 import net.minecraft.server.MinecraftServer;

 import org.apache.http.HttpResponse;
@ -15,9 +19,9 @@ import org.bukkit.Bukkit;
 import org.bukkit.ChatColor;
 import org.bukkit.command.CommandSender;

-import com.google.common.base.Splitter;
+import com.google.common.base.Joiner;

-public class KCauldronUpdater implements Runnable {
+public class KCauldronUpdater implements Runnable, IVersionCheckCallback {
 	private static final class LatestVersionCallback extends
 			CommandSenderUpdateCallback {
 		public LatestVersionCallback(CommandSender sender) {
@ -25,17 +29,17 @@ public class KCauldronUpdater implements Runnable {
 		}

 		@Override
-		public void newVersion(String currentVersion, String newVersion) {
+		public void newVersion(String newVersion) {
 			startUpdate(getSender(), newVersion);
 		}

 		@Override
-		public void upToDate(String version) {
+		public void upToDate() {
 			KCauldron.sUpdateInProgress = false;
 			CommandSender sender = getSender();
 			if (sender != null) {
 				sender.sendMessage(ChatColor.DARK_PURPLE + "Current version ("
-						+ version + ") is up to date");
+						+ KCauldron.getCurrentVersion() + ") is up to date");
 			}
 		}

@ -56,7 +60,8 @@ public class KCauldronUpdater implements Runnable {
 		if (version == null) {
 			sender.sendMessage(ChatColor.DARK_PURPLE
 					+ "Fetching latest version...");
-			new KVersionRetriever(new LatestVersionCallback(sender), false);
+			KVersionRetriever.startServer(new LatestVersionCallback(sender),
+					false);
 		} else {
 			startUpdate(sender, version);
 		}
@ -85,78 +90,66 @@ public class KCauldronUpdater implements Runnable {

 	@Override
 	public void run() {
+		if (!MinecraftServer.kcauldronConfig.updatecheckerQuite.getValue()) {
+			mSender.sendMessage(ChatColor.DARK_PURPLE
+					+ "Retrieving latest KBootstrap version...");
+		}
+		new KVersionRetriever(this, false, false, "pw.prok", "KBootstrap");
+	}
+
+	@Override
+	public void upToDate() {
+
+	}
+
+	@Override
+	public void newVersion(String kbootstrapVersion) {
 		boolean quite = MinecraftServer.kcauldronConfig.updatecheckerQuite
 				.getValue();
 		try {
-			MinecraftServer server = MinecraftServer.getServer();
-			final String filename = KCauldron.getChannel() + "-" + mVersion
-					+ "-server.jar";
-			File path = KCauldron.getServerLocation();
-			File newPath = new File(path.getParentFile(),
-					getInstallAs(filename));
-			if (mSender != null) {
 			if (!quite) {
 				mSender.sendMessage(ChatColor.DARK_PURPLE
-							+ "Current version is located in " + ChatColor.GOLD
-							+ path.getAbsolutePath());
-					mSender.sendMessage(ChatColor.DARK_PURPLE
-							+ "Installing new version in " + ChatColor.GOLD
-							+ newPath.getAbsolutePath());
+						+ "Downloading KBootstrap " + kbootstrapVersion + "...");
 			}
-				if (newPath.exists()) {
+			File kbootstrap = File.createTempFile("kbootstrap",
+					String.valueOf(System.currentTimeMillis()));
+			download("https://prok.pw/repo/pw/prok/KBootstrap/"
+					+ kbootstrapVersion + "/KBootstrap-" + kbootstrapVersion
+					+ "-app.jar", kbootstrap);
+			if (!quite) {
+				mSender.sendMessage(ChatColor.DARK_PURPLE
+						+ "Installing KCauldron " + mVersion
+						+ " via KBootstrap " + kbootstrapVersion + "...");
+			}
+
+			String javahome = System.getProperty("java.home");
+			String javapath = javahome + "/bin/java";
+
+			List<String> command = new ArrayList<String>();
+			command.add(javapath);
+			command.add("-jar");
+			command.add(kbootstrap.getCanonicalPath());
+			command.add("--serverDir");
+			command.add(KCauldron.getServerLocation().getCanonicalPath());
+			command.add("--installKCauldron");
+			command.add(mVersion);
+			command.add("--serverSymlinks");
+			command.add(MinecraftServer.kcauldronConfig.updatecheckerSymlinks
+					.getValue());
+
 			Bukkit.getConsoleSender().sendMessage(
-							"ERROR: Install location already exists: "
-									+ newPath.getAbsolutePath());
+					"Starting command: " + Joiner.on(' ').join(command));
+
+			ProcessBuilder builder = new ProcessBuilder(command);
+			builder.environment().put("JAVA_HOME", javahome);
+			switch (builder.start().waitFor()) {
+			case 0:
+				mSender.sendMessage(ChatColor.GREEN + "KCauldron " + mVersion
+						+ " installed");
+				break;
+			default:
 				mSender.sendMessage(ChatColor.RED
-							+ "ERROR: Install location already exists");
-					return;
-				}
-				if (!quite) {
-					mSender.sendMessage(ChatColor.DARK_PURPLE
-							+ "Downloading new version...");
-				}
-			}
-			HttpUriRequest request = RequestBuilder
-					.get()
-					.setUri("https://prok.pw/repo/pw/prok/"
-							+ KCauldron.getChannel() + "/" + mVersion + "/"
-							+ filename)
-					.addParameter("hostname", server.getHostname())
-					.addParameter("port", "" + server.getPort()).build();
-			HttpResponse response = HttpClientBuilder.create()
-					.setUserAgent("KCauldron Updater").build().execute(request);
-			if (response.getStatusLine().getStatusCode() != 200) {
-				throw new IllegalStateException(
-						"Could not download new version");
-			}
-			InputStream is = response.getEntity().getContent();
-			Files.copy(is, newPath.toPath());
-			if (mSender != null && !quite) {
-				mSender.sendMessage(ChatColor.DARK_PURPLE
-						+ "Download completed");
-			}
-			makeSymlinks(newPath);
-			if (MinecraftServer.kcauldronConfig.updatecheckerDeleteOld
-					.getValue()) {
-				if (mSender != null && !quite) {
-					mSender.sendMessage(ChatColor.DARK_PURPLE
-							+ "Mark old version for deletion");
-				}
-				path.deleteOnExit();
-				if (KCauldron.sNewServerLocation != null) {
-					KCauldron.sNewServerLocation.deleteOnExit();
-				}
-			}
-			if (mSender != null) {
-				mSender.sendMessage(ChatColor.DARK_PURPLE + "Update completed");
-			}
-			KCauldron.sNewServerLocation = newPath;
-			KCauldron.sNewServerVersion = mVersion;
-			if (MinecraftServer.kcauldronConfig.updatecheckerAutorestart.getValue()) {
-				if (mSender != null) {
-					mSender.sendMessage(ChatColor.DARK_RED + "Initiate server restart");
-				}
-				KCauldron.restart();
+						+ "Failed to install KCauldron " + mVersion);
 			}
 		} catch (Exception e) {
 			if (!quite) {
@ -171,35 +164,29 @@ public class KCauldronUpdater implements Runnable {
 		}
 	}

-	private String getInstallAs(String filename) {
-		String path = MinecraftServer.kcauldronConfig.updatecheckerInstallAs
-				.getValue().trim();
-		if (path.length() > 0) {
-			return path.replace("%version%", mVersion);
-		}
-		return filename;
+	@Override
+	public void error(Throwable t) {
+		KCauldron.sUpdateInProgress = false;
+		t.printStackTrace();
 	}

-	private void makeSymlinks(File newPath) {
-		try {
-			for (String symlink : Splitter.on(File.pathSeparatorChar).split(
-					MinecraftServer.kcauldronConfig.updatecheckerSymlinks
-							.getValue())) {
-				symlink = symlink.trim();
-				if (symlink.length() == 0)
-					continue;
-				File symlinkPath = new File(symlink);
-				if (mSender != null
-						&& !MinecraftServer.kcauldronConfig.updatecheckerQuite
-								.getValue()) {
-					mSender.sendMessage(ChatColor.RED + "Create symlink "
-							+ ChatColor.GOLD + symlinkPath.getAbsolutePath());
-				}
-				Files.deleteIfExists(symlinkPath.toPath());
-				Files.createSymbolicLink(symlinkPath.toPath(), newPath.toPath());
-			}
-		} catch (Exception e) {
-
+	private static void download(String url, File destination)
+			throws IOException {
+		HttpUriRequest request = RequestBuilder
+				.get()
+				.setUri(url)
+				.addParameter("hostname",
+						MinecraftServer.getServer().getHostname())
+				.addParameter("port",
+						String.valueOf(MinecraftServer.getServer().getPort()))
+				.build();
+		HttpResponse response = HttpClientBuilder.create()
+				.setUserAgent("KCauldron Updater").build().execute(request);
+		if (response.getStatusLine().getStatusCode() != 200) {
+			throw new IllegalStateException("Could not download " + url);
 		}
+		InputStream is = response.getEntity().getContent();
+		Files.copy(is, destination.toPath());
+		is.close();
 	}
 }
--- a/src/main/java/kcauldron/updater/KVersionRetriever.java
+++ b/src/main/java/kcauldron/updater/KVersionRetriever.java
@ -18,33 +18,42 @@ public class KVersionRetriever implements Runnable, UncaughtExceptionHandler {
 	private static final boolean DEBUG;
 	private static final KLog sLogger;
 	private static final JSONParser sParser;
-	private static final String sCurrentVersion;
 	private static MinecraftServer sServer;

 	static {
 		DEBUG = false;
 		sLogger = KLog.get(KVersionRetriever.class.getSimpleName());

-		sCurrentVersion = KCauldron.getCurrentVersion();
 		sParser = new JSONParser();
 	}

 	public static void init(MinecraftServer server) {
 		sServer = server;
 		if (MinecraftServer.kcauldronConfig.updatecheckerEnable.getValue()) {
-			new KVersionRetriever(DefaultUpdateCallback.INSTANCE, true);
+			startServer(DefaultUpdateCallback.INSTANCE, true);
 		}
 	}

+	public static void startServer(IVersionCheckCallback callback, boolean loop) {
+		new KVersionRetriever(callback, loop, true, "pw.prok",KCauldron.getChannel());
+	}
+
 	private final IVersionCheckCallback mCallback;
 	private final boolean mLoop;
 	private final Thread mThread;
+	private final String mGroup;
+	private final String mName;
+	private final boolean mUpToDateSupport;

-	public KVersionRetriever(IVersionCheckCallback callback, boolean loop) {
+	public KVersionRetriever(IVersionCheckCallback callback, boolean loop,
+			boolean upToDateSupport, String group, String name) {
 		if (DEBUG)
 			sLogger.info("Created new version retrivier");
 		mCallback = callback;
 		mLoop = loop;
+		mUpToDateSupport = upToDateSupport;
+		mGroup = group;
+		mName = name;
 		mThread = new Thread(this);
 		mThread.setName("KCauldron version retrievier");
 		mThread.setPriority(Thread.MIN_PRIORITY);
@ -68,13 +77,9 @@ public class KVersionRetriever implements Runnable, UncaughtExceptionHandler {
 	}

 	private void check() {
-		if (DEBUG)
-			sLogger.info("Requesting for new version...");
 		try {
-			HttpUriRequest request = RequestBuilder
-					.get()
-					.setUri("https://prok.pw/version/pw.prok/"
-							+ KCauldron.getChannel())
+			HttpUriRequest request = RequestBuilder.get()
+					.setUri("https://prok.pw/version/" + mGroup + "/" + mName)
 					.addParameter("hostname", sServer.getHostname())
 					.addParameter("port", "" + sServer.getPort()).build();
 			HttpResponse response = HttpClientBuilder.create()
@ -83,14 +88,11 @@ public class KVersionRetriever implements Runnable, UncaughtExceptionHandler {
 			JSONObject json = (JSONObject) sParser.parse(new InputStreamReader(
 					response.getEntity().getContent()));
 			String version = (String) json.get("version");
-			if (DEBUG) {
-				sLogger.info("Got the latest version: %s", version);
-				sLogger.info("Current version is %s", sCurrentVersion);
-			}
-			if (!sCurrentVersion.equals(version)) {
-				mCallback.newVersion(sCurrentVersion, version);
+			if (!mUpToDateSupport
+					|| !KCauldron.getCurrentVersion().equals(version)) {
+				mCallback.newVersion(version);
 			} else {
-				mCallback.upToDate(version);
+				mCallback.upToDate();
 			}
 		} catch (Exception e) {
 			uncaughtException(null, e);
@ -106,9 +108,9 @@ public class KVersionRetriever implements Runnable, UncaughtExceptionHandler {
 	}

 	public interface IVersionCheckCallback {
-		void upToDate(String version);
+		void upToDate();

-		void newVersion(String currentVersion, String newVersion);
+		void newVersion(String newVersion);

 		void error(Throwable t);
 	}