Add 'meshmc/' from commit 'fad6a1066616b69d7f5fef01178efdf014c59537'

git-subtree-dir: meshmc
git-subtree-mainline: 934382c8a1ce738589dee9ee0f14e1cec812770e
git-subtree-split: fad6a1066616b69d7f5fef01178efdf014c59537

6 files changed, 862 insertions, 0 deletions

diff --git a/meshmc/launcher/modplatform/technic/SingleZipPackInstallTask.cpp b/meshmc/launcher/modplatform/technic/SingleZipPackInstallTask.cpp
new file mode 100644
index 0000000000..e197ccbcd9
--- /dev/null
+++ b/meshmc/launcher/modplatform/technic/SingleZipPackInstallTask.cpp
@@ -0,0 +1,168 @@
+/* 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.
+ */
+
+#include "SingleZipPackInstallTask.h"
+
+#include <QtConcurrent>
+
+#include "MMCZip.h"
+#include "TechnicPackProcessor.h"
+#include "FileSystem.h"
+
+#include "Application.h"
+
+Technic::SingleZipPackInstallTask::SingleZipPackInstallTask(
+	const QUrl& sourceUrl, const QString& minecraftVersion)
+{
+	m_sourceUrl = sourceUrl;
+	m_minecraftVersion = minecraftVersion;
+}
+
+bool Technic::SingleZipPackInstallTask::abort()
+{
+	if (m_abortable) {
+		return m_filesNetJob->abort();
+	}
+	return false;
+}
+
+void Technic::SingleZipPackInstallTask::executeTask()
+{
+	setStatus(tr("Downloading modpack:\n%1").arg(m_sourceUrl.toString()));
+
+	const QString path = m_sourceUrl.host() + '/' + m_sourceUrl.path();
+	auto entry = APPLICATION->metacache()->resolveEntry("general", path);
+	entry->setStale(true);
+	m_filesNetJob = new NetJob(tr("Modpack download"), APPLICATION->network());
+	m_filesNetJob->addNetAction(Net::Download::makeCached(m_sourceUrl, entry));
+	m_archivePath = entry->getFullPath();
+	auto job = m_filesNetJob.get();
+	connect(job, &NetJob::succeeded, this,
+			&Technic::SingleZipPackInstallTask::downloadSucceeded);
+	connect(job, &NetJob::progress, this,
+			&Technic::SingleZipPackInstallTask::downloadProgressChanged);
+	connect(job, &NetJob::failed, this,
+			&Technic::SingleZipPackInstallTask::downloadFailed);
+	m_filesNetJob->start();
+}
+
+void Technic::SingleZipPackInstallTask::downloadSucceeded()
+{
+	m_abortable = false;
+
+	setStatus(tr("Extracting modpack"));
+	QDir extractDir(FS::PathCombine(m_stagingPath, ".minecraft"));
+	qDebug() << "Attempting to create instance from" << m_archivePath;
+
+	QString archivePath = m_archivePath;
+	QString extractPath = extractDir.absolutePath();
+	m_extractFuture = QtConcurrent::run(
+		QThreadPool::globalInstance(), [archivePath, extractPath]() {
+			return MMCZip::extractSubDir(archivePath, QString(""), extractPath);
+		});
+	connect(&m_extractFutureWatcher, &QFutureWatcher<QStringList>::finished,
+			this, &Technic::SingleZipPackInstallTask::extractFinished);
+	connect(&m_extractFutureWatcher, &QFutureWatcher<QStringList>::canceled,
+			this, &Technic::SingleZipPackInstallTask::extractAborted);
+	m_extractFutureWatcher.setFuture(m_extractFuture);
+	m_filesNetJob.reset();
+}
+
+void Technic::SingleZipPackInstallTask::downloadFailed(QString reason)
+{
+	m_abortable = false;
+	emitFailed(reason);
+	m_filesNetJob.reset();
+}
+
+void Technic::SingleZipPackInstallTask::downloadProgressChanged(qint64 current,
+																qint64 total)
+{
+	m_abortable = true;
+	setProgress(current / 2, total);
+}
+
+void Technic::SingleZipPackInstallTask::extractFinished()
+{
+	if (!m_extractFuture.result()) {
+		emitFailed(tr("Failed to extract modpack"));
+		return;
+	}
+	QDir extractDir(m_stagingPath);
+
+	qDebug() << "Fixing permissions for extracted pack files...";
+	QDirIterator it(extractDir, QDirIterator::Subdirectories);
+	while (it.hasNext()) {
+		auto filepath = it.next();
+		QFileInfo file(filepath);
+		auto permissions = QFile::permissions(filepath);
+		auto origPermissions = permissions;
+		if (file.isDir()) {
+			// Folder +rwx for current user
+			permissions |= QFileDevice::Permission::ReadUser |
+						   QFileDevice::Permission::WriteUser |
+						   QFileDevice::Permission::ExeUser;
+		} else {
+			// File +rw for current user
+			permissions |= QFileDevice::Permission::ReadUser |
+						   QFileDevice::Permission::WriteUser;
+		}
+		if (origPermissions != permissions) {
+			if (!QFile::setPermissions(filepath, permissions)) {
+				logWarning(
+					tr("Could not fix permissions for %1").arg(filepath));
+			} else {
+				qDebug() << "Fixed" << filepath;
+			}
+		}
+	}
+
+	shared_qobject_ptr<Technic::TechnicPackProcessor> packProcessor =
+		new Technic::TechnicPackProcessor();
+	connect(packProcessor.get(), &Technic::TechnicPackProcessor::succeeded,
+			this, &Technic::SingleZipPackInstallTask::emitSucceeded);
+	connect(packProcessor.get(), &Technic::TechnicPackProcessor::failed, this,
+			&Technic::SingleZipPackInstallTask::emitFailed);
+	packProcessor->run(m_globalSettings, m_instName, m_instIcon, m_stagingPath,
+					   m_minecraftVersion);
+}
+
+void Technic::SingleZipPackInstallTask::extractAborted()
+{
+	emitFailed(tr("Instance import has been aborted."));
+}
diff --git a/meshmc/launcher/modplatform/technic/SingleZipPackInstallTask.h b/meshmc/launcher/modplatform/technic/SingleZipPackInstallTask.h
new file mode 100644
index 0000000000..afad66f70b
--- /dev/null
+++ b/meshmc/launcher/modplatform/technic/SingleZipPackInstallTask.h
@@ -0,0 +1,88 @@
+/* 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 "InstanceTask.h"
+#include "net/NetJob.h"
+
+#include <QFutureWatcher>
+#include <QStringList>
+#include <QUrl>
+
+#include <nonstd/optional>
+
+namespace Technic
+{
+
+	class SingleZipPackInstallTask : public InstanceTask
+	{
+		Q_OBJECT
+
+	  public:
+		SingleZipPackInstallTask(const QUrl& sourceUrl,
+								 const QString& minecraftVersion);
+
+		bool canAbort() const override
+		{
+			return true;
+		}
+		bool abort() override;
+
+	  protected:
+		void executeTask() override;
+
+	  private slots:
+		void downloadSucceeded();
+		void downloadFailed(QString reason);
+		void downloadProgressChanged(qint64 current, qint64 total);
+		void extractFinished();
+		void extractAborted();
+
+	  private:
+		bool m_abortable = false;
+
+		QUrl m_sourceUrl;
+		QString m_minecraftVersion;
+		QString m_archivePath;
+		NetJob::Ptr m_filesNetJob;
+		QFuture<nonstd::optional<QStringList>> m_extractFuture;
+		QFutureWatcher<nonstd::optional<QStringList>> m_extractFutureWatcher;
+	};
+
+} // namespace Technic
diff --git a/meshmc/launcher/modplatform/technic/SolderPackInstallTask.cpp b/meshmc/launcher/modplatform/technic/SolderPackInstallTask.cpp
new file mode 100644
index 0000000000..e5943ffdd4
--- /dev/null
+++ b/meshmc/launcher/modplatform/technic/SolderPackInstallTask.cpp
@@ -0,0 +1,236 @@
+/* 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.
+ */
+
+#include "SolderPackInstallTask.h"
+
+#include <FileSystem.h>
+#include <Json.h>
+#include <QtConcurrentRun>
+#include <MMCZip.h>
+#include "TechnicPackProcessor.h"
+
+Technic::SolderPackInstallTask::SolderPackInstallTask(
+	shared_qobject_ptr<QNetworkAccessManager> network, const QUrl& sourceUrl,
+	const QString& minecraftVersion)
+{
+	m_sourceUrl = sourceUrl;
+	m_minecraftVersion = minecraftVersion;
+	m_network = network;
+}
+
+bool Technic::SolderPackInstallTask::abort()
+{
+	if (m_abortable) {
+		return m_filesNetJob->abort();
+	}
+	return false;
+}
+
+void Technic::SolderPackInstallTask::executeTask()
+{
+	setStatus(
+		tr("Finding recommended version:\n%1").arg(m_sourceUrl.toString()));
+	m_filesNetJob = new NetJob(tr("Finding recommended version"), m_network);
+	m_filesNetJob->addNetAction(
+		Net::Download::makeByteArray(m_sourceUrl, &m_response));
+	auto job = m_filesNetJob.get();
+	connect(job, &NetJob::succeeded, this,
+			&Technic::SolderPackInstallTask::versionSucceeded);
+	connect(job, &NetJob::failed, this,
+			&Technic::SolderPackInstallTask::downloadFailed);
+	m_filesNetJob->start();
+}
+
+void Technic::SolderPackInstallTask::versionSucceeded()
+{
+	try {
+		QJsonDocument doc = Json::requireDocument(m_response);
+		QJsonObject obj = Json::requireObject(doc);
+		QString version =
+			Json::requireString(obj, "recommended", "__placeholder__");
+		m_sourceUrl = m_sourceUrl.toString() + '/' + version;
+	} catch (const JSONValidationError& e) {
+		emitFailed(e.cause());
+		m_filesNetJob.reset();
+		return;
+	}
+
+	setStatus(tr("Resolving modpack files:\n%1").arg(m_sourceUrl.toString()));
+	m_filesNetJob = new NetJob(tr("Resolving modpack files"), m_network);
+	m_filesNetJob->addNetAction(
+		Net::Download::makeByteArray(m_sourceUrl, &m_response));
+	auto job = m_filesNetJob.get();
+	connect(job, &NetJob::succeeded, this,
+			&Technic::SolderPackInstallTask::fileListSucceeded);
+	connect(job, &NetJob::failed, this,
+			&Technic::SolderPackInstallTask::downloadFailed);
+	m_filesNetJob->start();
+}
+
+void Technic::SolderPackInstallTask::fileListSucceeded()
+{
+	setStatus(tr("Downloading modpack:"));
+	QStringList modUrls;
+	try {
+		QJsonDocument doc = Json::requireDocument(m_response);
+		QJsonObject obj = Json::requireObject(doc);
+		QString minecraftVersion =
+			Json::ensureString(obj, "minecraft", QString(), "__placeholder__");
+		if (!minecraftVersion.isEmpty())
+			m_minecraftVersion = minecraftVersion;
+		QJsonArray mods = Json::requireArray(obj, "mods", "'mods'");
+		for (auto mod : mods) {
+			QJsonObject modObject = Json::requireObject(mod);
+			modUrls.append(Json::requireString(modObject, "url", "'url'"));
+		}
+	} catch (const JSONValidationError& e) {
+		emitFailed(e.cause());
+		m_filesNetJob.reset();
+		return;
+	}
+	m_filesNetJob = new NetJob(tr("Downloading modpack"), m_network);
+	int i = 0;
+	for (auto& modUrl : modUrls) {
+		auto path = FS::PathCombine(m_outputDir.path(), QString("%1").arg(i));
+		m_filesNetJob->addNetAction(Net::Download::makeFile(modUrl, path));
+		i++;
+	}
+
+	m_modCount = modUrls.size();
+
+	connect(m_filesNetJob.get(), &NetJob::succeeded, this,
+			&Technic::SolderPackInstallTask::downloadSucceeded);
+	connect(m_filesNetJob.get(), &NetJob::progress, this,
+			&Technic::SolderPackInstallTask::downloadProgressChanged);
+	connect(m_filesNetJob.get(), &NetJob::failed, this,
+			&Technic::SolderPackInstallTask::downloadFailed);
+	m_filesNetJob->start();
+}
+
+void Technic::SolderPackInstallTask::downloadSucceeded()
+{
+	m_abortable = false;
+
+	setStatus(tr("Extracting modpack"));
+	m_filesNetJob.reset();
+	m_extractFuture = QtConcurrent::run([this]() {
+		int i = 0;
+		QString extractDir = FS::PathCombine(m_stagingPath, ".minecraft");
+		FS::ensureFolderPathExists(extractDir);
+
+		while (m_modCount > i) {
+			auto path =
+				FS::PathCombine(m_outputDir.path(), QString("%1").arg(i));
+			if (!MMCZip::extractDir(path, extractDir)) {
+				return false;
+			}
+			i++;
+		}
+		return true;
+	});
+	connect(&m_extractFutureWatcher, &QFutureWatcher<QStringList>::finished,
+			this, &Technic::SolderPackInstallTask::extractFinished);
+	connect(&m_extractFutureWatcher, &QFutureWatcher<QStringList>::canceled,
+			this, &Technic::SolderPackInstallTask::extractAborted);
+	m_extractFutureWatcher.setFuture(m_extractFuture);
+}
+
+void Technic::SolderPackInstallTask::downloadFailed(QString reason)
+{
+	m_abortable = false;
+	emitFailed(reason);
+	m_filesNetJob.reset();
+}
+
+void Technic::SolderPackInstallTask::downloadProgressChanged(qint64 current,
+															 qint64 total)
+{
+	m_abortable = true;
+	setProgress(current / 2, total);
+}
+
+void Technic::SolderPackInstallTask::extractFinished()
+{
+	if (!m_extractFuture.result()) {
+		emitFailed(tr("Failed to extract modpack"));
+		return;
+	}
+	QDir extractDir(m_stagingPath);
+
+	qDebug() << "Fixing permissions for extracted pack files...";
+	QDirIterator it(extractDir, QDirIterator::Subdirectories);
+	while (it.hasNext()) {
+		auto filepath = it.next();
+		QFileInfo file(filepath);
+		auto permissions = QFile::permissions(filepath);
+		auto origPermissions = permissions;
+		if (file.isDir()) {
+			// Folder +rwx for current user
+			permissions |= QFileDevice::Permission::ReadUser |
+						   QFileDevice::Permission::WriteUser |
+						   QFileDevice::Permission::ExeUser;
+		} else {
+			// File +rw for current user
+			permissions |= QFileDevice::Permission::ReadUser |
+						   QFileDevice::Permission::WriteUser;
+		}
+		if (origPermissions != permissions) {
+			if (!QFile::setPermissions(filepath, permissions)) {
+				logWarning(
+					tr("Could not fix permissions for %1").arg(filepath));
+			} else {
+				qDebug() << "Fixed" << filepath;
+			}
+		}
+	}
+
+	shared_qobject_ptr<Technic::TechnicPackProcessor> packProcessor =
+		new Technic::TechnicPackProcessor();
+	connect(packProcessor.get(), &Technic::TechnicPackProcessor::succeeded,
+			this, &Technic::SolderPackInstallTask::emitSucceeded);
+	connect(packProcessor.get(), &Technic::TechnicPackProcessor::failed, this,
+			&Technic::SolderPackInstallTask::emitFailed);
+	packProcessor->run(m_globalSettings, m_instName, m_instIcon, m_stagingPath,
+					   m_minecraftVersion, true);
+}
+
+void Technic::SolderPackInstallTask::extractAborted()
+{
+	emitFailed(tr("Instance import has been aborted."));
+	return;
+}
diff --git a/meshmc/launcher/modplatform/technic/SolderPackInstallTask.h b/meshmc/launcher/modplatform/technic/SolderPackInstallTask.h
new file mode 100644
index 0000000000..8a80c37580
--- /dev/null
+++ b/meshmc/launcher/modplatform/technic/SolderPackInstallTask.h
@@ -0,0 +1,90 @@
+/* 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 <InstanceTask.h>
+#include <net/NetJob.h>
+#include <tasks/Task.h>
+
+#include <QUrl>
+
+namespace Technic
+{
+	class SolderPackInstallTask : public InstanceTask
+	{
+		Q_OBJECT
+	  public:
+		explicit SolderPackInstallTask(
+			shared_qobject_ptr<QNetworkAccessManager> network,
+			const QUrl& sourceUrl, const QString& minecraftVersion);
+
+		bool canAbort() const override
+		{
+			return true;
+		}
+		bool abort() override;
+
+	  protected:
+		//! Entry point for tasks.
+		virtual void executeTask() override;
+
+	  private slots:
+		void versionSucceeded();
+		void fileListSucceeded();
+		void downloadSucceeded();
+		void downloadFailed(QString reason);
+		void downloadProgressChanged(qint64 current, qint64 total);
+		void extractFinished();
+		void extractAborted();
+
+	  private:
+		bool m_abortable = false;
+
+		shared_qobject_ptr<QNetworkAccessManager> m_network;
+
+		NetJob::Ptr m_filesNetJob;
+		QUrl m_sourceUrl;
+		QString m_minecraftVersion;
+		QByteArray m_response;
+		QTemporaryDir m_outputDir;
+		int m_modCount;
+		QFuture<bool> m_extractFuture;
+		QFutureWatcher<bool> m_extractFutureWatcher;
+	};
+} // namespace Technic
diff --git a/meshmc/launcher/modplatform/technic/TechnicPackProcessor.cpp b/meshmc/launcher/modplatform/technic/TechnicPackProcessor.cpp
new file mode 100644
index 0000000000..fe4e24efe9
--- /dev/null
+++ b/meshmc/launcher/modplatform/technic/TechnicPackProcessor.cpp
@@ -0,0 +1,218 @@
+/* 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 2020-2021 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.
+ */
+
+#include "TechnicPackProcessor.h"
+
+#include <FileSystem.h>
+#include <Json.h>
+#include <minecraft/MinecraftInstance.h>
+#include <minecraft/PackProfile.h>
+#include <MMCZip.h>
+#include <settings/INISettingsObject.h>
+
+#include <memory>
+
+void Technic::TechnicPackProcessor::run(SettingsObjectPtr globalSettings,
+										const QString& instName,
+										const QString& instIcon,
+										const QString& stagingPath,
+										const QString& minecraftVersion,
+										const bool isSolder)
+{
+	QString minecraftPath = FS::PathCombine(stagingPath, ".minecraft");
+	QString configPath = FS::PathCombine(stagingPath, "instance.cfg");
+	auto instanceSettings = std::make_shared<INISettingsObject>(configPath);
+	instanceSettings->registerSetting("InstanceType", "Legacy");
+	instanceSettings->set("InstanceType", "OneSix");
+	MinecraftInstance instance(globalSettings, instanceSettings, stagingPath);
+
+	instance.setName(instName);
+
+	if (instIcon != "default") {
+		instance.setIconKey(instIcon);
+	}
+
+	auto components = instance.getPackProfile();
+	components->buildingFromScratch();
+
+	QByteArray data;
+
+	QString modpackJar = FS::PathCombine(minecraftPath, "bin", "modpack.jar");
+	QString versionJson = FS::PathCombine(minecraftPath, "bin", "version.json");
+	QString fmlMinecraftVersion;
+	if (QFile::exists(modpackJar)) {
+		if (MMCZip::entryExists(modpackJar, "version.json")) {
+			if (MMCZip::entryExists(modpackJar, "fmlversion.properties")) {
+				QByteArray fmlVersionData = MMCZip::readFileFromZip(
+					modpackJar, "fmlversion.properties");
+				if (fmlVersionData.isEmpty()) {
+					emit failed(
+						tr("Unable to open \"fmlversion.properties\"!"));
+					return;
+				}
+				INIFile iniFile;
+				iniFile.loadFile(fmlVersionData);
+				// If not present, this evaluates to a null string
+				fmlMinecraftVersion = iniFile["fmlbuild.mcversion"].toString();
+			}
+			data = MMCZip::readFileFromZip(modpackJar, "version.json");
+			if (data.isEmpty()) {
+				emit failed(tr("Unable to open \"version.json\"!"));
+				return;
+			}
+		} else {
+			if (minecraftVersion.isEmpty())
+				emit failed(tr(
+					"Could not find \"version.json\" inside "
+					"\"bin/modpack.jar\", but minecraft version is unknown"));
+			components->setComponentVersion("net.minecraft", minecraftVersion,
+											true);
+			components->installJarMods({modpackJar});
+
+			// Forge for 1.4.7 and for 1.5.2 require extra libraries.
+			// Figure out the forge version and add it as a component
+			// (the code still comes from the jar mod installed above)
+			if (MMCZip::entryExists(modpackJar, "forgeversion.properties")) {
+				QByteArray forgeVersionData = MMCZip::readFileFromZip(
+					modpackJar, "forgeversion.properties");
+				if (forgeVersionData.isEmpty()) {
+					// Really shouldn't happen, but error handling shall not be
+					// forgotten
+					emit failed(
+						tr("Unable to open \"forgeversion.properties\""));
+					return;
+				}
+				INIFile iniFile;
+				iniFile.loadFile(forgeVersionData);
+				QString major, minor, revision, build;
+				major = iniFile["forge.major.number"].toString();
+				minor = iniFile["forge.minor.number"].toString();
+				revision = iniFile["forge.revision.number"].toString();
+				build = iniFile["forge.build.number"].toString();
+
+				if (major.isEmpty() || minor.isEmpty() || revision.isEmpty() ||
+					build.isEmpty()) {
+					emit failed(tr("Invalid \"forgeversion.properties\"!"));
+					return;
+				}
+
+				components->setComponentVersion("net.minecraftforge",
+												major + '.' + minor + '.' +
+													revision + '.' + build);
+			}
+
+			components->saveNow();
+			emit succeeded();
+			return;
+		}
+	} else if (QFile::exists(versionJson)) {
+		QFile file(versionJson);
+		if (!file.open(QIODevice::ReadOnly)) {
+			emit failed(tr("Unable to open \"version.json\"!"));
+			return;
+		}
+		data = file.readAll();
+		file.close();
+	} else {
+		// This is the "Vanilla" modpack, excluded by the search code
+		emit failed(tr("Unable to find a \"version.json\"!"));
+		return;
+	}
+
+	try {
+		QJsonDocument doc = Json::requireDocument(data);
+		QJsonObject root = Json::requireObject(doc, "version.json");
+		QString minecraftVersion =
+			Json::ensureString(root, "inheritsFrom", QString(), "");
+		if (minecraftVersion.isEmpty()) {
+			if (fmlMinecraftVersion.isEmpty()) {
+				emit failed(tr("Could not understand "
+							   "\"version.json\":\ninheritsFrom is missing"));
+				return;
+			}
+			minecraftVersion = fmlMinecraftVersion;
+		}
+		components->setComponentVersion("net.minecraft", minecraftVersion,
+										true);
+		for (auto library : Json::ensureArray(root, "libraries", {})) {
+			if (!library.isObject()) {
+				continue;
+			}
+
+			auto libraryObject = Json::ensureObject(library, {}, "");
+			auto libraryName =
+				Json::ensureString(libraryObject, "name", "", "");
+
+			if (libraryName.startsWith("net.minecraftforge:forge:") &&
+				libraryName.contains('-')) {
+				QString libraryVersion = libraryName.section(':', 2);
+				if (!libraryVersion.startsWith("1.7.10-")) {
+					components->setComponentVersion(
+						"net.minecraftforge", libraryName.section('-', 1));
+				} else {
+					// 1.7.10 versions sometimes look
+					// like 1.7.10-10.13.4.1614-1.7.10, this filters out
+					// the 10.13.4.1614 part
+					components->setComponentVersion(
+						"net.minecraftforge", libraryName.section('-', 1, 1));
+				}
+			} else if (libraryName.startsWith(
+						   "net.minecraftforge:minecraftforge:")) {
+				components->setComponentVersion("net.minecraftforge",
+												libraryName.section(':', 2));
+			} else if (libraryName.startsWith("net.fabricmc:fabric-loader:")) {
+				components->setComponentVersion("net.fabricmc.fabric-loader",
+												libraryName.section(':', 2));
+			} else if (libraryName.startsWith(
+						   "net.neoforged.fancymodloader:loader:") ||
+					   libraryName.startsWith("net.neoforged:neoforge:")) {
+				components->setComponentVersion("net.neoforged",
+												libraryName.section(':', 2));
+			} else if (libraryName.startsWith("org.quiltmc:quilt-loader:")) {
+				components->setComponentVersion("org.quiltmc.quilt-loader",
+												libraryName.section(':', 2));
+			}
+		}
+	} catch (const JSONValidationError& e) {
+		emit failed(tr("Could not understand \"version.json\":\n") + e.cause());
+		return;
+	}
+
+	components->saveNow();
+	emit succeeded();
+}
diff --git a/meshmc/launcher/modplatform/technic/TechnicPackProcessor.h b/meshmc/launcher/modplatform/technic/TechnicPackProcessor.h
new file mode 100644
index 0000000000..8b41a5e3f8
--- /dev/null
+++ b/meshmc/launcher/modplatform/technic/TechnicPackProcessor.h
@@ -0,0 +1,62 @@
+/* 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 2020-2021 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 <QString>
+#include "settings/SettingsObject.h"
+
+namespace Technic
+{
+	// not exporting it, only used in SingleZipPackInstallTask,
+	// InstanceImportTask and SolderPackInstallTask
+	class TechnicPackProcessor : public QObject
+	{
+		Q_OBJECT
+
+	  signals:
+		void succeeded();
+		void failed(QString reason);
+
+	  public:
+		void run(SettingsObjectPtr globalSettings, const QString& instName,
+				 const QString& instIcon, const QString& stagingPath,
+				 const QString& minecraftVersion = QString(),
+				 const bool isSolder = false);
+	};
+} // namespace Technic