GH-1034 do jar modding separate from update

18 files changed, 214 insertions, 141 deletions

diff --git a/application/CMakeLists.txt b/application/CMakeLists.txt
index 281f402a..ae4c0a88 100644
--- a/application/CMakeLists.txt
+++ b/application/CMakeLists.txt
@@ -141,8 +141,8 @@ SET(MULTIMC_SOURCES
 	SettingsUI.cpp
 
 	# Processes
-	LaunchController.h
-	LaunchController.cpp
+	LaunchInteraction.h
+	LaunchInteraction.cpp
 
 	# page provider for instances
 	InstancePageProvider.h
diff --git a/application/LaunchController.cpp b/application/LaunchInteraction.cpp
index b1116e07..ea966129 100644
--- a/application/LaunchController.cpp
+++ b/application/LaunchInteraction.cpp
@@ -1,4 +1,4 @@
-#include "LaunchController.h"
+#include "LaunchInteraction.h"
 #include <auth/MojangAccountList.h>
 #include "MultiMC.h"
 #include "dialogs/CustomMessageBox.h"
@@ -23,6 +23,7 @@ void LaunchController::launch()
 	login();
 }
 
+// FIXME: minecraft specific
 void LaunchController::login()
 {
 	if (!m_instance)
@@ -156,7 +157,7 @@ void LaunchController::launchInstance()
 		return;
 	}
 
-	m_launcher = m_instance->prepareForLaunch(m_session);
+	m_launcher = m_instance->createLaunchTask(m_session);
 	if (!m_launcher)
 	{
 		return;
diff --git a/application/LaunchController.h b/application/LaunchInteraction.h
index f62d5124..f62d5124 100644
--- a/application/LaunchController.h
+++ b/application/LaunchInteraction.h
diff --git a/application/MainWindow.cpp b/application/MainWindow.cpp
index 4be80492..bd50e06d 100644
--- a/application/MainWindow.cpp
+++ b/application/MainWindow.cpp
@@ -372,7 +372,7 @@ namespace Ui {
 #include "java/JavaUtils.h"
 #include "JavaCommon.h"
 #include "InstancePageProvider.h"
-#include "LaunchController.h"
+#include "LaunchInteraction.h"
 #include "SettingsUI.h"
 #include "minecraft/SkinUtils.h"
 #include "resources/Resource.h"
@@ -1184,7 +1184,7 @@ void MainWindow::finalizeInstance(InstancePtr inst)
 	if (MMC->accounts()->anyAccountIsValid())
 	{
 		ProgressDialog loadDialog(this);
-		auto update = inst->doUpdate();
+		auto update = inst->createUpdateTask();
 		connect(update.get(), &Task::failed, [this](QString reason)
 		{
 			QString error = QString("Instance load failed: %1").arg(reason);
diff --git a/application/pages/VersionPage.cpp b/application/pages/VersionPage.cpp
index efc0b446..81da0180 100644
--- a/application/pages/VersionPage.cpp
+++ b/application/pages/VersionPage.cpp
@@ -269,7 +269,7 @@ void VersionPage::on_changeVersionBtn_clicked()
 
 int VersionPage::doUpdate()
 {
-	auto updateTask = m_inst->doUpdate();
+	auto updateTask = m_inst->createUpdateTask();
 	if (!updateTask)
 	{
 		return 1;
diff --git a/logic/BaseInstance.h b/logic/BaseInstance.h
index 497431d0..720385c8 100644
--- a/logic/BaseInstance.h
+++ b/logic/BaseInstance.h
@@ -135,13 +135,21 @@ public:
 	virtual SettingsObjectPtr settings() const;
 
 	/// returns a valid update task
-	virtual std::shared_ptr<Task> doUpdate() = 0;
+	virtual std::shared_ptr<Task> createUpdateTask() = 0;
 
-	/// returns a valid process, ready for launch with the given account.
-	virtual std::shared_ptr<BaseLauncher> prepareForLaunch(AuthSessionPtr account) = 0;
+	/// returns a valid launcher (task container)
+	virtual std::shared_ptr<BaseLauncher> createLaunchTask(AuthSessionPtr account) = 0;
 
-	/// do any necessary cleanups after the instance finishes. also runs before
-	/// 'prepareForLaunch'
+	/*!
+	 * Returns a task that should be done right before launch
+	 * This task should do any extra preparations needed
+	 */
+	virtual std::shared_ptr<Task> createJarModdingTask() = 0;
+
+	/*!
+	 * does any necessary cleanups after the instance finishes. also runs before\
+	 * TODO: turn into a task that can run asynchronously
+	 */
 	virtual void cleanupAfterRun() = 0;
 
 	virtual QString getStatusbarDescription() = 0;
diff --git a/logic/BaseLauncher.cpp b/logic/BaseLauncher.cpp
index 8dfb5f6d..4ab0c41a 100644
--- a/logic/BaseLauncher.cpp
+++ b/logic/BaseLauncher.cpp
@@ -421,7 +421,7 @@ void BaseLauncher::on_pre_state(LoggedProcess::State state)
 
 void BaseLauncher::updateInstance()
 {
-	m_updateTask = m_instance->doUpdate();
+	m_updateTask = m_instance->createUpdateTask();
 	if(m_updateTask)
 	{
 		connect(m_updateTask.get(), SIGNAL(finished()), this, SLOT(updateFinished()));
@@ -435,7 +435,7 @@ void BaseLauncher::updateFinished()
 {
 	if(m_updateTask->successful())
 	{
-		makeReady();
+		doJarModding();
 	}
 	else
 	{
@@ -445,6 +445,28 @@ void BaseLauncher::updateFinished()
 	}
 }
 
+void BaseLauncher::doJarModding()
+{
+	m_jarModTask = m_instance->createJarModdingTask();
+	if(!m_jarModTask)
+	{
+		jarModdingSucceeded();
+	}
+	connect(m_jarModTask.get(), SIGNAL(succeeded()), this, SLOT(jarModdingSucceeded()));
+	connect(m_jarModTask.get(), SIGNAL(failed(QString)), this, SLOT(jarModdingFailed(QString)));
+	m_jarModTask->start();
+}
+
+void BaseLauncher::jarModdingSucceeded()
+{
+	makeReady();
+}
+
+void BaseLauncher::jarModdingFailed(QString reason)
+{
+	emitFailed(reason);
+}
+
 void BaseLauncher::makeReady()
 {
 	QStringList args = javaArguments();
diff --git a/logic/BaseLauncher.h b/logic/BaseLauncher.h
index d8877b3d..f7b52c89 100644
--- a/logic/BaseLauncher.h
+++ b/logic/BaseLauncher.h
@@ -95,6 +95,7 @@ public: /* HACK: MINECRAFT: split! */
 protected: /* methods */
 	void preLaunch();
 	void updateInstance();
+	void doJarModding();
 	void makeReady();
 	void postLaunch();
 	virtual void emitFailed(QString reason);
@@ -108,6 +109,10 @@ protected: /* methods */
 	virtual QString censorPrivateInfo(QString in);
 	virtual MessageLevel::Enum guessLevel(const QString &message, MessageLevel::Enum defaultLevel);
 
+protected slots:
+	void jarModdingSucceeded();
+	void jarModdingFailed(QString reason);
+
 signals:
 	/**
 	 * @brief emitted when the launch preparations are done
@@ -161,6 +166,7 @@ protected: /* HACK: MINECRAFT: split! */
 	QString launchScript;
 	QString m_nativeFolder;
 	std::shared_ptr<Task> m_updateTask;
+	std::shared_ptr<Task> m_jarModTask;
 
 protected: /* HACK: MINECRAFT: split! */
 	void checkJava();
diff --git a/logic/NullInstance.h b/logic/NullInstance.h
index 6f737e86..0927322e 100644
--- a/logic/NullInstance.h
+++ b/logic/NullInstance.h
@@ -43,11 +43,15 @@ public:
 	{
 		return instanceRoot();
 	};
-	virtual std::shared_ptr<BaseLauncher> prepareForLaunch(AuthSessionPtr)
+	virtual std::shared_ptr<BaseLauncher> createLaunchTask(AuthSessionPtr)
 	{
 		return nullptr;
 	}
-	virtual std::shared_ptr< Task > doUpdate()
+	virtual std::shared_ptr< Task > createUpdateTask()
+	{
+		return nullptr;
+	}
+	virtual std::shared_ptr<Task> createJarModdingTask()
 	{
 		return nullptr;
 	}
diff --git a/logic/ftb/OneSixFTBInstance.cpp b/logic/ftb/OneSixFTBInstance.cpp
index 88c885b9..7cce1f48 100644
--- a/logic/ftb/OneSixFTBInstance.cpp
+++ b/logic/ftb/OneSixFTBInstance.cpp
@@ -134,9 +134,9 @@ QString OneSixFTBInstance::getStatusbarDescription()
 	return "OneSix FTB: " + intendedVersionId();
 }
 
-std::shared_ptr<Task> OneSixFTBInstance::doUpdate()
+std::shared_ptr<Task> OneSixFTBInstance::createUpdateTask()
 {
-	return OneSixInstance::doUpdate();
+	return OneSixInstance::createUpdateTask();
 }
 
 #include "OneSixFTBInstance.moc"
diff --git a/logic/ftb/OneSixFTBInstance.h b/logic/ftb/OneSixFTBInstance.h
index dd652fd1..564f275d 100644
--- a/logic/ftb/OneSixFTBInstance.h
+++ b/logic/ftb/OneSixFTBInstance.h
@@ -17,7 +17,7 @@ public:
 
 	virtual QString getStatusbarDescription();
 
-	virtual std::shared_ptr<Task> doUpdate() override;
+	virtual std::shared_ptr<Task> createUpdateTask() override;
 
 	virtual QString id() const;
 
diff --git a/logic/minecraft/LegacyInstance.cpp b/logic/minecraft/LegacyInstance.cpp
index 3fe51a4a..8431c35b 100644
--- a/logic/minecraft/LegacyInstance.cpp
+++ b/logic/minecraft/LegacyInstance.cpp
@@ -26,6 +26,7 @@
 #include "icons/IconList.h"
 #include "BaseLauncher.h"
 #include "minecraft/ModList.h"
+#include <MMCZip.h>
 
 LegacyInstance::LegacyInstance(SettingsObjectPtr globalSettings, SettingsObjectPtr settings, const QString &rootDir)
 	: MinecraftInstance(globalSettings, settings, rootDir)
@@ -87,7 +88,7 @@ bool LegacyInstance::shouldUseCustomBaseJar() const
 }
 
 
-std::shared_ptr<Task> LegacyInstance::doUpdate()
+std::shared_ptr<Task> LegacyInstance::createUpdateTask()
 {
 	// make sure the jar mods list is initialized by asking for it.
 	auto list = jarModList();
@@ -95,7 +96,7 @@ std::shared_ptr<Task> LegacyInstance::doUpdate()
 	return std::shared_ptr<Task>(new LegacyUpdate(this, this));
 }
 
-std::shared_ptr<BaseLauncher> LegacyInstance::prepareForLaunch(AuthSessionPtr account)
+std::shared_ptr<BaseLauncher> LegacyInstance::createLaunchTask(AuthSessionPtr account)
 {
 	QString launchScript;
 	QIcon icon = ENV.icons()->getIcon(iconKey());
@@ -129,6 +130,87 @@ std::shared_ptr<BaseLauncher> LegacyInstance::prepareForLaunch(AuthSessionPtr ac
 	return process;
 }
 
+std::shared_ptr<Task> LegacyInstance::createJarModdingTask()
+{
+	class JarModTask : public Task
+	{
+	public:
+		explicit JarModTask(std::shared_ptr<LegacyInstance> inst) : m_inst(inst), Task(nullptr)
+		{
+		}
+		virtual void executeTask()
+		{
+			if (!m_inst->shouldRebuild())
+			{
+				emitSucceeded();
+				return;
+			}
+
+			// Get the mod list
+			auto modList = m_inst->getJarMods();
+
+			QFileInfo runnableJar(m_inst->runnableJar());
+			QFileInfo baseJar(m_inst->baseJar());
+			bool base_is_custom = m_inst->shouldUseCustomBaseJar();
+
+			// Nothing to do if there are no jar mods to install, no backup and just the mc jar
+			if (base_is_custom)
+			{
+				// yes, this can happen if the instance only has the runnable jar and not the base jar
+				// it *could* be assumed that such an instance is vanilla, but that wouldn't be safe
+				// because that's not something mmc4 guarantees
+				if (runnableJar.isFile() && !baseJar.exists() && modList.empty())
+				{
+					m_inst->setShouldRebuild(false);
+					emitSucceeded();
+					return;
+				}
+
+				setStatus(tr("Installing mods: Backing up minecraft.jar ..."));
+				if (!baseJar.exists() && !QFile::copy(runnableJar.filePath(), baseJar.filePath()))
+				{
+					emitFailed("It seems both the active and base jar are gone. A fresh base jar will "
+							"be used on next run.");
+					m_inst->setShouldRebuild(true);
+					m_inst->setShouldUpdate(true);
+					m_inst->setShouldUseCustomBaseJar(false);
+					return;
+				}
+			}
+
+			if (!baseJar.exists())
+			{
+				emitFailed("The base jar " + baseJar.filePath() + " does not exist");
+				return;
+			}
+
+			if (runnableJar.exists() && !QFile::remove(runnableJar.filePath()))
+			{
+				emitFailed("Failed to delete old minecraft.jar");
+				return;
+			}
+
+			setStatus(tr("Installing mods: Opening minecraft.jar ..."));
+
+			QString outputJarPath = runnableJar.filePath();
+			QString inputJarPath = baseJar.filePath();
+
+			if(!MMCZip::createModdedJar(inputJarPath, outputJarPath, modList))
+			{
+				emitFailed(tr("Failed to create the custom Minecraft jar file."));
+				return;
+			}
+			m_inst->setShouldRebuild(false);
+			// inst->UpdateVersion(true);
+			emitSucceeded();
+			return;
+
+		}
+		std::shared_ptr<LegacyInstance> m_inst;
+	};
+	return std::make_shared<JarModTask>(std::dynamic_pointer_cast<LegacyInstance>(shared_from_this()));
+}
+
 void LegacyInstance::cleanupAfterRun()
 {
 	// FIXME: delete the launcher and icons and whatnot.
diff --git a/logic/minecraft/LegacyInstance.h b/logic/minecraft/LegacyInstance.h
index a8363e58..51871876 100644
--- a/logic/minecraft/LegacyInstance.h
+++ b/logic/minecraft/LegacyInstance.h
@@ -109,9 +109,12 @@ public:
 
 	virtual bool shouldUpdate() const override;
 	virtual void setShouldUpdate(bool val) override;
-	virtual std::shared_ptr<Task> doUpdate() override;
+	virtual std::shared_ptr<Task> createUpdateTask() override;
+
+	virtual std::shared_ptr<BaseLauncher> createLaunchTask(AuthSessionPtr account) override;
+
+	virtual std::shared_ptr<Task> createJarModdingTask() override;
 
-	virtual std::shared_ptr<BaseLauncher> prepareForLaunch(AuthSessionPtr account) override;
 	virtual void cleanupAfterRun() override;
 
 	virtual QString getStatusbarDescription() override;
diff --git a/logic/minecraft/LegacyUpdate.cpp b/logic/minecraft/LegacyUpdate.cpp
index 78f2f5b7..7ea20ad8 100644
--- a/logic/minecraft/LegacyUpdate.cpp
+++ b/logic/minecraft/LegacyUpdate.cpp
@@ -349,7 +349,7 @@ void LegacyUpdate::jarStart()
 	LegacyInstance *inst = (LegacyInstance *)m_inst;
 	if (!inst->shouldUpdate() || inst->shouldUseCustomBaseJar())
 	{
-		ModTheJar();
+		emitSucceeded();
 		return;
 	}
 
@@ -384,7 +384,7 @@ void LegacyUpdate::jarStart()
 void LegacyUpdate::jarFinished()
 {
 	// process the jar
-	ModTheJar();
+	emitSucceeded();
 }
 
 void LegacyUpdate::jarFailed(QString reason)
@@ -392,73 +392,3 @@ void LegacyUpdate::jarFailed(QString reason)
 	// bad, bad
 	emitFailed(tr("Failed to download the minecraft jar: %1.").arg(reason));
 }
-
-void LegacyUpdate::ModTheJar()
-{
-	LegacyInstance *inst = (LegacyInstance *)m_inst;
-
-	if (!inst->shouldRebuild())
-	{
-		emitSucceeded();
-		return;
-	}
-
-	// Get the mod list
-	auto modList = inst->getJarMods();
-
-	QFileInfo runnableJar(inst->runnableJar());
-	QFileInfo baseJar(inst->baseJar());
-	bool base_is_custom = inst->shouldUseCustomBaseJar();
-
-	// Nothing to do if there are no jar mods to install, no backup and just the mc jar
-	if (base_is_custom)
-	{
-		// yes, this can happen if the instance only has the runnable jar and not the base jar
-		// it *could* be assumed that such an instance is vanilla, but that wouldn't be safe
-		// because that's not something mmc4 guarantees
-		if (runnableJar.isFile() && !baseJar.exists() && modList.empty())
-		{
-			inst->setShouldRebuild(false);
-			emitSucceeded();
-			return;
-		}
-
-		setStatus(tr("Installing mods: Backing up minecraft.jar ..."));
-		if (!baseJar.exists() && !QFile::copy(runnableJar.filePath(), baseJar.filePath()))
-		{
-			emitFailed("It seems both the active and base jar are gone. A fresh base jar will "
-					   "be used on next run.");
-			inst->setShouldRebuild(true);
-			inst->setShouldUpdate(true);
-			inst->setShouldUseCustomBaseJar(false);
-			return;
-		}
-	}
-
-	if (!baseJar.exists())
-	{
-		emitFailed("The base jar " + baseJar.filePath() + " does not exist");
-		return;
-	}
-
-	if (runnableJar.exists() && !QFile::remove(runnableJar.filePath()))
-	{
-		emitFailed("Failed to delete old minecraft.jar");
-		return;
-	}
-
-	setStatus(tr("Installing mods: Opening minecraft.jar ..."));
-
-	QString outputJarPath = runnableJar.filePath();
-	QString inputJarPath = baseJar.filePath();
-
-	if(!MMCZip::createModdedJar(inputJarPath, outputJarPath, modList))
-	{
-		emitFailed(tr("Failed to create the custom Minecraft jar file."));
-		return;
-	}
-	inst->setShouldRebuild(false);
-	// inst->UpdateVersion(true);
-	emitSucceeded();
-	return;
-}
diff --git a/logic/minecraft/LegacyUpdate.h b/logic/minecraft/LegacyUpdate.h
index fc389ae1..c52bf934 100644
--- a/logic/minecraft/LegacyUpdate.h
+++ b/logic/minecraft/LegacyUpdate.h
@@ -51,8 +51,6 @@ slots:
 
 	void extractLwjgl();
 
-	void ModTheJar();
-
 private:
 
 	std::shared_ptr<QNetworkReply> m_reply;
diff --git a/logic/minecraft/OneSixInstance.cpp b/logic/minecraft/OneSixInstance.cpp
index 63bc071f..4af56b54 100644
--- a/logic/minecraft/OneSixInstance.cpp
+++ b/logic/minecraft/OneSixInstance.cpp
@@ -56,7 +56,7 @@ QSet<QString> OneSixInstance::traits()
 		return version->traits;
 }
 
-std::shared_ptr<Task> OneSixInstance::doUpdate()
+std::shared_ptr<Task> OneSixInstance::createUpdateTask()
 {
 	return std::shared_ptr<Task>(new OneSixUpdate(this));
 }
@@ -123,7 +123,7 @@ QStringList OneSixInstance::processMinecraftArgs(AuthSessionPtr session)
 	return parts;
 }
 
-std::shared_ptr<BaseLauncher> OneSixInstance::prepareForLaunch(AuthSessionPtr session)
+std::shared_ptr<BaseLauncher> OneSixInstance::createLaunchTask(AuthSessionPtr session)
 {
 	QString launchScript;
 	QIcon icon = ENV.icons()->getIcon(iconKey());
@@ -237,6 +237,64 @@ std::shared_ptr<BaseLauncher> OneSixInstance::prepareForLaunch(AuthSessionPtr se
 	return process;
 }
 
+std::shared_ptr<Task> OneSixInstance::createJarModdingTask()
+{
+	class JarModTask : public Task
+	{
+	public:
+		explicit JarModTask(std::shared_ptr<OneSixInstance> inst) : m_inst(inst), Task(nullptr)
+		{
+		}
+		virtual void executeTask()
+		{
+			std::shared_ptr<MinecraftProfile> version = m_inst->getMinecraftProfile();
+			// nuke obsolete stripped jar(s) if needed
+			QString version_id = version->id;
+			QString strippedPath = version_id + "/" + version_id + "-stripped.jar";
+			QFile strippedJar(strippedPath);
+			if(strippedJar.exists())
+			{
+				strippedJar.remove();
+			}
+			auto tempJarPath = QDir(m_inst->instanceRoot()).absoluteFilePath("temp.jar");
+			QFile tempJar(tempJarPath);
+			if(tempJar.exists())
+			{
+				tempJar.remove();
+			}
+			auto finalJarPath = QDir(m_inst->instanceRoot()).absoluteFilePath("minecraft.jar");
+			QFile finalJar(finalJarPath);
+			if(finalJar.exists())
+			{
+				if(!finalJar.remove())
+				{
+					emitFailed(tr("Couldn't remove stale jar file: %1").arg(finalJarPath));
+					return;
+				}
+			}
+
+			// create temporary modded jar, if needed
+			auto jarMods = m_inst->getJarMods();
+			if(jarMods.size())
+			{
+				auto sourceJarPath = m_inst->versionsPath().absoluteFilePath(version->id + "/" + version->id + ".jar");
+				QString localPath = version_id + "/" + version_id + ".jar";
+				auto metacache = ENV.metacache();
+				auto entry = metacache->resolveEntry("versions", localPath);
+				QString fullJarPath = entry->getFullPath();
+				if(!MMCZip::createModdedJar(sourceJarPath, finalJarPath, jarMods))
+				{
+					emitFailed(tr("Failed to create the custom Minecraft jar file."));
+					return;
+				}
+			}
+			emitSucceeded();
+		}
+		std::shared_ptr<OneSixInstance> m_inst;
+	};
+	return std::make_shared<JarModTask>(std::dynamic_pointer_cast<OneSixInstance>(shared_from_this()));
+}
+
 void OneSixInstance::cleanupAfterRun()
 {
 	QString target_dir = PathCombine(instanceRoot(), "natives/");
diff --git a/logic/minecraft/OneSixInstance.h b/logic/minecraft/OneSixInstance.h
index 3825ba6a..46545462 100644
--- a/logic/minecraft/OneSixInstance.h
+++ b/logic/minecraft/OneSixInstance.h
@@ -48,8 +48,9 @@ public:
 	QString libDir() const;
 	virtual QString instanceConfigFolder() const override;
 
-	virtual std::shared_ptr<Task> doUpdate() override;
-	virtual std::shared_ptr<BaseLauncher> prepareForLaunch(AuthSessionPtr account) override;
+	virtual std::shared_ptr<Task> createUpdateTask() override;
+	virtual std::shared_ptr<BaseLauncher> createLaunchTask(AuthSessionPtr account) override;
+	virtual std::shared_ptr<Task> createJarModdingTask() override;
 
 	virtual void cleanupAfterRun() override;
 
diff --git a/logic/minecraft/OneSixUpdate.cpp b/logic/minecraft/OneSixUpdate.cpp
index 8463ead6..34bd7de9 100644
--- a/logic/minecraft/OneSixUpdate.cpp
+++ b/logic/minecraft/OneSixUpdate.cpp
@@ -296,46 +296,6 @@ void OneSixUpdate::jarlibFinished()
 	OneSixInstance *inst = (OneSixInstance *)m_inst;
 	std::shared_ptr<MinecraftProfile> version = inst->getMinecraftProfile();
 
-	// nuke obsolete stripped jar(s) if needed
-	QString version_id = version->id;
-	QString strippedPath = version_id + "/" + version_id + "-stripped.jar";
-	QFile strippedJar(strippedPath);
-	if(strippedJar.exists())
-	{
-		strippedJar.remove();
-	}
-	auto tempJarPath = QDir(m_inst->instanceRoot()).absoluteFilePath("temp.jar");
-	QFile tempJar(tempJarPath);
-	if(tempJar.exists())
-	{
-		tempJar.remove();
-	}
-	auto finalJarPath = QDir(m_inst->instanceRoot()).absoluteFilePath("minecraft.jar");
-	QFile finalJar(finalJarPath);
-	if(finalJar.exists())
-	{
-		if(!finalJar.remove())
-		{
-			emitFailed(tr("Couldn't remove stale jar file: %1").arg(finalJarPath));
-			return;
-		}
-	}
-
-	// create temporary modded jar, if needed
-	auto jarMods = inst->getJarMods();
-	if(jarMods.size())
-	{
-		auto sourceJarPath = m_inst->versionsPath().absoluteFilePath(version->id + "/" + version->id + ".jar");
-		QString localPath = version_id + "/" + version_id + ".jar";
-		auto metacache = ENV.metacache();
-		auto entry = metacache->resolveEntry("versions", localPath);
-		QString fullJarPath = entry->getFullPath();
-		if(!MMCZip::createModdedJar(sourceJarPath, finalJarPath, jarMods))
-		{
-			emitFailed(tr("Failed to create the custom Minecraft jar file."));
-			return;
-		}
-	}
 	if (version->traits.contains("legacyFML"))
 	{
 		fmllibsStart();