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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/>.
*/
#include "LegacyUpgradeTask.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/PackProfile.h"
#include "LegacyModList.h"
#include "classparser.h"
LegacyUpgradeTask::LegacyUpgradeTask(InstancePtr origInstance)
{
m_origInstance = origInstance;
}
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;
}
}
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");
// NOTE: this scope ensures the instance is fully saved before we
// emitSucceeded
{
MinecraftInstance inst(m_globalSettings, instanceSettings,
m_stagingPath);
inst.setName(m_instName);
QString preferredVersionNumber = decideVersion(
legacyInst->currentVersionId(), legacyInst->intendedVersionId());
if (preferredVersionNumber.isNull()) {
// try to decide version based on the jar(s?)
preferredVersionNumber =
classparser::GetMinecraftJarVersion(legacyInst->baseJar());
if (preferredVersionNumber.isNull()) {
preferredVersionNumber = classparser::GetMinecraftJarVersion(
legacyInst->runnableJar());
if (preferredVersionNumber.isNull()) {
emitFailed(tr("Could not decide Minecraft version."));
return;
}
}
}
auto components = inst.getPackProfile();
components->buildingFromScratch();
components->setComponentVersion("net.minecraft", preferredVersionNumber,
true);
QString jarPath = legacyInst->mainJarToPreserve();
if (!jarPath.isNull()) {
qDebug() << "Preserving base jar! : " << 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
components->installCustomJar(jarPath);
}
auto jarMods = legacyInst->jarModList()->allMods();
for (auto& jarMod : jarMods) {
QString modPath = jarMod.absoluteFilePath();
qDebug() << "jarMod: " << modPath;
components->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", "MeshMCLauncher.jar", "icon.png"};
removeAll(inst.instanceRoot(), rootRemovables);
removeAll(inst.gameRoot(), mcRemovables);
}
emitSucceeded();
}
void LegacyUpgradeTask::copyAborted()
{
emitFailed(tr("Instance folder copy has been aborted."));
return;
}
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