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/* SPDX-FileCopyrightText: 2026 Project Tick
* SPDX-FileContributor: Project Tick
* SPDX-License-Identifier: GPL-3.0-or-later
*
* MeshMC - A Custom Launcher for Minecraft
* Copyright (C) 2026 Project Tick
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*
* This file incorporates work covered by the following copyright and
* permission notice:
*
* Copyright 2013-2021 MultiMC Contributors
*
* 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.
*/
#pragma once
#include "BaseInstance.h"
#include "launch/LaunchTask.h"
class ModFolderModel;
class LegacyModList;
class WorldList;
class Task;
/*
* WHY: Legacy instances - from MultiMC 3 and 4 - are here only to provide a way
* to upgrade them to the current format.
*/
class LegacyInstance : public BaseInstance
{
Q_OBJECT
public:
explicit LegacyInstance(SettingsObjectPtr globalSettings,
SettingsObjectPtr settings, const QString& rootDir);
virtual void saveNow() override {}
/// Path to the instance's minecraft.jar
QString runnableJar() const;
//! Path to the instance's modlist file.
QString modListFile() const;
////// Directories //////
QString libDir() const;
QString savesDir() const;
QString texturePacksDir() const;
QString jarModsDir() const;
QString coreModsDir() const;
QString resourceDir() const;
QString instanceConfigFolder() const override;
QString
gameRoot() const override; // Path to the instance's minecraft directory.
QString
modsRoot() const override; // Path to the instance's minecraft directory.
QString binRoot() const; // Path to the instance's minecraft bin directory.
/// Get the curent base jar of this instance. By default, it's the
/// versions/$version/$version.jar
QString baseJar() const;
/// the default base jar of this instance
QString defaultBaseJar() const;
/// the default custom base jar of this instance
QString defaultCustomBaseJar() const;
// the main jar that we actually want to keep when migrating the instance
QString mainJarToPreserve() const;
/*!
* Whether or not custom base jar is used
*/
bool shouldUseCustomBaseJar() const;
/*!
* The value of the custom base jar
*/
QString customBaseJar() const;
std::shared_ptr<LegacyModList> jarModList() const;
std::shared_ptr<WorldList> worldList() const;
/*!
* Whether or not the instance's minecraft.jar needs to be rebuilt.
* If this is true, when the instance launches, its jar mods will be
* re-added to a fresh minecraft.jar file.
*/
bool shouldRebuild() const;
QString currentVersionId() const;
QString intendedVersionId() const;
QSet<QString> traits() const override
{
return {"legacy-instance", "texturepacks"};
};
virtual bool shouldUpdate() const;
virtual Task::Ptr createUpdateTask(Net::Mode mode) override;
virtual QString typeName() const override;
bool canLaunch() const override
{
return false;
}
bool canEdit() const override
{
return true;
}
bool canExport() const override
{
return false;
}
shared_qobject_ptr<LaunchTask>
createLaunchTask(AuthSessionPtr account,
MinecraftServerTargetPtr serverToJoin) override
{
return nullptr;
}
IPathMatcher::Ptr getLogFileMatcher() override
{
return nullptr;
}
QString getLogFileRoot() override
{
return gameRoot();
}
QString getStatusbarDescription() override;
QStringList
verboseDescription(AuthSessionPtr session,
MinecraftServerTargetPtr serverToJoin) override;
QProcessEnvironment createEnvironment() override
{
return QProcessEnvironment();
}
QMap<QString, QString> getVariables() const override
{
return {};
}
protected:
mutable std::shared_ptr<LegacyModList> jar_mod_list;
mutable std::shared_ptr<WorldList> m_world_list;
};
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