Method handleDataMigration

launcher/Application.cpp:1799–1883

}

bool Application::handleDataMigration(const QString& currentData,
                                      const QString& oldData,
                                      const QString& name,
                                      const QString& configFile) const
{
    QString nomigratePath = FS::PathCombine(currentData, name + "_nomigrate.txt");
    QStringList configPaths = { FS::PathCombine(oldData, configFile), FS::PathCombine(oldData, BuildConfig.LAUNCHER_CONFIGFILE) };

    QLocale locale;

    // Is there a valid config at the old location?
    bool configExists = false;
    for (QString configPath : configPaths) {
        configExists |= QFileInfo::exists(configPath);
    }

    if (!configExists || QFileInfo::exists(nomigratePath)) {
        qDebug() << "<> No migration needed from" << name;
        return false;
    }

    QString message;
    bool currentExists = QFileInfo::exists(FS::PathCombine(currentData, BuildConfig.LAUNCHER_CONFIGFILE));

    if (currentExists) {
        message = tr("Old data from %1 was found, but you already have existing data for %2. Sadly you will need to migrate yourself. Do "
                     "you want to be reminded of the pending data migration next time you start %2?")
                      .arg(name, BuildConfig.LAUNCHER_DISPLAYNAME);
    } else {
        message = tr("It looks like you used %1 before. Do you want to migrate your data to the new location of %2?")
                      .arg(name, BuildConfig.LAUNCHER_DISPLAYNAME);

        QFileInfo logInfo(FS::PathCombine(oldData, name + "-0.log"));
        if (logInfo.exists()) {
            QString lastModified = logInfo.lastModified().toString(locale.dateFormat());
            message = tr("It looks like you used %1 on %2 before. Do you want to migrate your data to the new location of %3?")
                          .arg(name, lastModified, BuildConfig.LAUNCHER_DISPLAYNAME);
        }
    }

    QMessageBox::StandardButton askMoveDialogue =
        QMessageBox::question(nullptr, BuildConfig.LAUNCHER_DISPLAYNAME, message, QMessageBox::Yes | QMessageBox::No, QMessageBox::Yes);

    auto setDoNotMigrate = [&nomigratePath] {
        QFile file(nomigratePath);
        file.open(QIODevice::WriteOnly);
    };

    // create no-migrate file if user doesn't want to migrate
    if (askMoveDialogue != QMessageBox::Yes) {
        qDebug() << "<> Migration declined for" << name;
        setDoNotMigrate();
        return currentExists;  // cancel further migrations, if we already have a data directory
    }

    if (!currentExists) {
        // Migrate!
        auto matcher = std::make_shared<MultiMatcher>();