Method launch

launcher/Application.cpp:1536–1578

}

bool Application::launch(BaseInstance* instance,
                         LaunchMode mode,
                         MinecraftTarget::Ptr targetToJoin,
                         MinecraftAccountPtr accountToUse,
                         const QString& offlineName)
{
    if (m_updateRunning) {
        qDebug() << "Cannot launch instances while an update is running. Please try again when updates are completed.";
    } else if (instance->canLaunch()) {
        QMutexLocker locker(&m_instanceExtrasMutex);
        auto& extras = m_instanceExtras[instance->id()];
        auto window = extras.window;
        if (window) {
            if (!window->saveAll()) {
                return false;
            }
        }
        auto& controller = extras.controller;
        controller.reset(new LaunchController());
        controller->setInstance(instance);
        controller->setLaunchMode(mode);
        controller->setProfiler(profilers().value(instance->settings()->get("Profiler").toString(), nullptr).get());
        controller->setTargetToJoin(targetToJoin);
        controller->setAccountToUse(accountToUse);
        controller->setOfflineName(offlineName);
        if (window) {
            controller->setParentWidget(window);
        } else if (m_mainWindow) {
            controller->setParentWidget(m_mainWindow);
        }
        connect(controller.get(), &LaunchController::finished, this, &Application::controllerFinished);
        addRunningInstance();
        QMetaObject::invokeMethod(controller.get(), &Task::start, Qt::QueuedConnection);
        return true;
    } else if (instance->isRunning()) {
        showInstanceWindow(instance, "console");
        return true;
    } else if (instance->canEdit()) {
        showInstanceWindow(instance);
        return true;
    }
    return false;
}

bool Application::kill(BaseInstance* instance)
{