NOISSUE implement LEgacy instance migration

api/logic/CMakeLists.txt

@@ -232,8 +232,8 @@ set(MINECRAFT_SOURCES
 	minecraft/legacy/LegacyModList.cpp
 	minecraft/legacy/LegacyInstance.h
 	minecraft/legacy/LegacyInstance.cpp
-	minecraft/legacy/LegacyMigrationTask.h
-	minecraft/legacy/LegacyMigrationTask.cpp
+	minecraft/legacy/LegacyUpgradeTask.h
+	minecraft/legacy/LegacyUpgradeTask.cpp
 	minecraft/GradleSpecifier.h
 	minecraft/MinecraftInstance.cpp
 	minecraft/MinecraftInstance.h

api/logic/FolderInstanceProvider.cpp

@@ -430,6 +430,16 @@ Task * FolderInstanceProvider::copyTask(const InstancePtr& oldInstance, const QS
 	return new FolderInstanceStaging(this, task, stagingPath, instName, instGroup);
 }
 
+// FIXME: find a better place for this
+#include "minecraft/legacy/LegacyUpgradeTask.h"
+Task * FolderInstanceProvider::legacyUpgradeTask(const InstancePtr& oldInstance)
+{
+	auto stagingPath = getStagedInstancePath();
+	QString newName = tr("%1 (Migrated)").arg(oldInstance->name());
+	auto task = new LegacyUpgradeTask(m_globalSettings, stagingPath, oldInstance, newName);
+	return new FolderInstanceStaging(this, task, stagingPath, newName, oldInstance->group());
+}
+
 QString FolderInstanceProvider::getStagedInstancePath()
 {
 	QString key = QUuid::createUuid().toString();

api/logic/FolderInstanceProvider.h

@@ -28,6 +28,9 @@ class MULTIMC_LOGIC_EXPORT FolderInstanceProvider : public BaseInstanceProvider
 	// import zipped instance into this provider
 	Task * zipImportTask(const QUrl sourceUrl, const QString &instName, const QString &instGroup, const QString &instIcon);
 
+	// migrate an instance to the current format
+	Task * legacyUpgradeTask(const InstancePtr& oldInstance);
+
 	/**
 	 * Create a new empty staging area for instance creation and @return a path/key top commit it later.
 	 * Used by instance manipulation tasks.

api/logic/minecraft/legacy/LegacyUpgradeTask.cpp

@@ -0,0 +1,133 @@
+#include "LegacyUpgradeTask.h"
+#include "BaseInstanceProvider.h"
+#include "settings/INISettingsObject.h"
+#include "FileSystem.h"
+#include "NullInstance.h"
+#include "pathmatcher/RegexpMatcher.h"
+#include <QtConcurrentRun>
+#include "LegacyInstance.h"
+#include "minecraft/MinecraftInstance.h"
+#include "minecraft/MinecraftProfile.h"
+
+LegacyUpgradeTask::LegacyUpgradeTask(SettingsObjectPtr settings, const QString & stagingPath, InstancePtr origInstance, const QString & newName)
+{
+	m_globalSettings = settings;
+	m_stagingPath = stagingPath;
+	m_origInstance = origInstance;
+	m_newName = newName;
+}
+
+void LegacyUpgradeTask::executeTask()
+{
+	setStatus(tr("Copying instance %1").arg(m_origInstance->name()));
+
+	FS::copy folderCopy(m_origInstance->instanceRoot(), m_stagingPath);
+	folderCopy.followSymlinks(true);
+
+	m_copyFuture = QtConcurrent::run(QThreadPool::globalInstance(), folderCopy);
+	connect(&m_copyFutureWatcher, &QFutureWatcher<bool>::finished, this, &LegacyUpgradeTask::copyFinished);
+	connect(&m_copyFutureWatcher, &QFutureWatcher<bool>::canceled, this, &LegacyUpgradeTask::copyAborted);
+	m_copyFutureWatcher.setFuture(m_copyFuture);
+}
+
+static QString decideVersion(const QString& currentVersion, const QString& intendedVersion)
+{
+	if(intendedVersion != currentVersion)
+	{
+		if(!intendedVersion.isEmpty())
+		{
+			return intendedVersion;
+		}
+		else if(!currentVersion.isEmpty())
+		{
+			return currentVersion;
+		}
+	}
+	else
+	{
+		if(!intendedVersion.isEmpty())
+		{
+			return intendedVersion;
+		}
+	}
+	// TODO: possibly add fallback to the old jar/classfile analysis method from MultiMC4
+	return QString();
+}
+
+void LegacyUpgradeTask::copyFinished()
+{
+	auto successful = m_copyFuture.result();
+	if(!successful)
+	{
+		emitFailed(tr("Instance folder copy failed."));
+		return;
+	}
+	auto legacyInst = std::dynamic_pointer_cast<LegacyInstance>(m_origInstance);
+
+	auto instanceSettings = std::make_shared<INISettingsObject>(FS::PathCombine(m_stagingPath, "instance.cfg"));
+	instanceSettings->registerSetting("InstanceType", "Legacy");
+	instanceSettings->set("InstanceType", "OneSix");
+	std::shared_ptr<MinecraftInstance> inst(new MinecraftInstance(m_globalSettings, instanceSettings, m_stagingPath));
+	inst->setName(m_newName);
+	inst->init();
+
+	QString preferredVersionNumber = decideVersion(legacyInst->currentVersionId(), legacyInst->intendedVersionId());
+	if(preferredVersionNumber.isNull())
+	{
+		// FIXME: let the user decide
+		emitFailed(tr("Could not decide Minecraft version."));
+		return;
+	}
+	inst->setComponentVersion("net.minecraft", preferredVersionNumber);
+
+	// BUG: reloadProfile should not be necessary, but setComponentVersion voids the profile created by init()!
+	inst->reloadProfile();
+	auto profile = inst->getMinecraftProfile();
+
+	if(legacyInst->shouldUseCustomBaseJar())
+	{
+		QString jarPath = legacyInst->customBaseJar();
+		qDebug() << "Base jar is custom! : " << jarPath;
+		// FIXME: handle case when the jar is unreadable?
+		// TODO: check the hash, if it's the same as the upstream jar, do not do this
+		profile->installCustomJar(jarPath);
+	}
+
+	auto jarMods = legacyInst->getJarMods();
+	for(auto & jarMod: jarMods)
+	{
+		QString modPath = jarMod.filename().absoluteFilePath();
+		qDebug() << "jarMod: " << modPath;
+		profile->installJarMods({modPath});
+	}
+
+	// remove all the extra garbage we no longer need
+	auto removeAll = [&](const QString &root, const QStringList &things)
+	{
+		for(auto &thing : things)
+		{
+			auto removePath = FS::PathCombine(root, thing);
+			QFileInfo stat(removePath);
+			if(stat.isDir())
+			{
+				FS::deletePath(removePath);
+			}
+			else
+			{
+				QFile::remove(removePath);
+			}
+		}
+	};
+	QStringList rootRemovables = {"modlist", "version", "instMods"};
+	QStringList mcRemovables = {"bin", "MultiMCLauncher.jar", "icon.png"};
+	removeAll(inst->instanceRoot(), rootRemovables);
+	removeAll(inst->minecraftRoot(), mcRemovables);
+	emitSucceeded();
+}
+
+void LegacyUpgradeTask::copyAborted()
+{
+	emitFailed(tr("Instance folder copy has been aborted."));
+	return;
+}
+

api/logic/minecraft/legacy/LegacyMigrationTask.h → api/logic/minecraft/legacy/LegacyUpgradeTask.h

@@ -13,11 +13,11 @@
 
 class BaseInstanceProvider;
 
-class MULTIMC_LOGIC_EXPORT LegacyMigrationTask : public Task
+class MULTIMC_LOGIC_EXPORT LegacyUpgradeTask : public Task
 {
 	Q_OBJECT
 public:
-	explicit LegacyMigrationTask(SettingsObjectPtr settings, const QString & stagingPath, InstancePtr origInstance);
+	explicit LegacyUpgradeTask(SettingsObjectPtr settings, const QString & stagingPath, InstancePtr origInstance, const QString & newName);
 
 protected:
 	//! Entry point for tasks.
@@ -29,6 +29,7 @@ class MULTIMC_LOGIC_EXPORT LegacyMigrationTask : public Task
 	SettingsObjectPtr m_globalSettings;
 	InstancePtr m_origInstance;
 	QString m_stagingPath;
+	QString m_newName;
 	QFuture<bool> m_copyFuture;
 	QFutureWatcher<bool> m_copyFutureWatcher;
 };

application/InstancePageProvider.h

@@ -49,7 +49,7 @@ class InstancePageProvider : public QObject, public BasePageProvider
 		std::shared_ptr<LegacyInstance> legacy = std::dynamic_pointer_cast<LegacyInstance>(inst);
 		if(legacy)
 		{
-			values.append(new LegacyUpgradePage(legacy.get()));
+			values.append(new LegacyUpgradePage(legacy));
 			values.append(new NotesPage(legacy.get()));
 			values.append(new WorldListPage(legacy.get(), legacy->worldList(), "worlds", "worlds", tr("Worlds"), "Worlds"));
 			values.append(new ScreenshotsPage(FS::PathCombine(legacy->minecraftRoot(), "screenshots")));

application/pages/LegacyUpgradePage.cpp

@@ -2,8 +2,13 @@
 #include "ui_LegacyUpgradePage.h"
 
 #include "minecraft/legacy/LegacyInstance.h"
+#include "minecraft/legacy/LegacyUpgradeTask.h"
+#include "MultiMC.h"
+#include "FolderInstanceProvider.h"
+#include "dialogs/CustomMessageBox.h"
+#include "dialogs/ProgressDialog.h"
 
-LegacyUpgradePage::LegacyUpgradePage(LegacyInstance *inst, QWidget *parent)
+LegacyUpgradePage::LegacyUpgradePage(InstancePtr inst, QWidget *parent)
 	: QWidget(parent), ui(new Ui::LegacyUpgradePage), m_inst(inst)
 {
 	ui->setupUi(this);
@@ -14,9 +19,21 @@ LegacyUpgradePage::~LegacyUpgradePage()
 	delete ui;
 }
 
+void LegacyUpgradePage::runModalTask(Task *task)
+{
+	connect(task, &Task::failed, [this](QString reason)
+		{
+			CustomMessageBox::selectable(this, tr("Error"), reason, QMessageBox::Warning)->show();
+		});
+	ProgressDialog loadDialog(this);
+	loadDialog.setSkipButton(true, tr("Abort"));
+	loadDialog.execWithTask(task);
+}
+
 void LegacyUpgradePage::on_upgradeButton_clicked()
 {
-	// now what?
+	std::unique_ptr<Task> task(MMC->folderProvider()->legacyUpgradeTask(m_inst));
+	runModalTask(task.get());
 }
 
 bool LegacyUpgradePage::shouldDisplay() const

application/pages/LegacyUpgradePage.h

@@ -20,6 +20,7 @@
 #include "minecraft/legacy/LegacyInstance.h"
 #include "pages/BasePage.h"
 #include <MultiMC.h>
+#include "tasks/Task.h"
 
 namespace Ui
 {
@@ -31,7 +32,7 @@ class LegacyUpgradePage : public QWidget, public BasePage
 	Q_OBJECT
 
 public:
-	explicit LegacyUpgradePage(LegacyInstance *inst, QWidget *parent = 0);
+	explicit LegacyUpgradePage(InstancePtr inst, QWidget *parent = 0);
 	virtual ~LegacyUpgradePage();
 	virtual QString displayName() const override
 	{
@@ -50,11 +51,14 @@ class LegacyUpgradePage : public QWidget, public BasePage
 		return "Legacy-upgrade";
 	}
 	virtual bool shouldDisplay() const override;
-private
-slots:
+
+private slots:
 	void on_upgradeButton_clicked();
 
+private:
+	void runModalTask(Task *task);
+
 private:
 	Ui::LegacyUpgradePage *ui;
-	LegacyInstance *m_inst;
+	InstancePtr m_inst;
 };