Function cleanUpOldDesktopIntegrationResources

src/shared/shared.cpp:1019–1098

}

bool cleanUpOldDesktopIntegrationResources(bool verbose) {
    auto dirPath = QStandardPaths::writableLocation(QStandardPaths::GenericDataLocation) + "/applications";

    auto directory = QDir(dirPath);

    QStringList filters;
    filters << "appimagekit_*.desktop";

    directory.setNameFilters(filters);

    for (auto desktopFilePath : directory.entryList()) {
        desktopFilePath = dirPath + "/" + desktopFilePath;

        std::shared_ptr<GKeyFile> desktopFile(g_key_file_new(), [](GKeyFile* p) {
            g_key_file_free(p);
        });

        if (!g_key_file_load_from_file(desktopFile.get(), desktopFilePath.toStdString().c_str(), G_KEY_FILE_NONE, nullptr)) {
            continue;
        }

        std::shared_ptr<char> execValue(g_key_file_get_string(desktopFile.get(), G_KEY_FILE_DESKTOP_GROUP, G_KEY_FILE_DESKTOP_KEY_EXEC, nullptr), [](char* p) {
            free(p);
        });

        // if there is no Exec value in the file, the desktop file is apparently broken, therefore we skip the file
        if (execValue == nullptr) {
            continue;
        }

        std::shared_ptr<char> tryExecValue(g_key_file_get_string(desktopFile.get(), G_KEY_FILE_DESKTOP_GROUP, G_KEY_FILE_DESKTOP_KEY_TRY_EXEC, nullptr), [](char* p) {
            free(p);
        });

        // TryExec is optional, although recently the desktop integration functions started to force add such keys
        // with a path to the desktop file
        // (before, if it existed, the key was replaced with the AppImage's path)
        // If it exists, we assume its value is the full path to the AppImage, which can be used to check the existence
        // of the AppImage
        QString appImagePath;

        if (tryExecValue != nullptr) {
            appImagePath = QString(tryExecValue.get());
        } else {
            appImagePath = QString(execValue.get()).split(" ").first();
        }

        // now, check whether AppImage exists
        // FIXME: the split command for the Exec value might not work if there's a space in the filename
        // we really need a parser that understands the desktop file escaping
        if (!QFile(appImagePath).exists()) {
            if (verbose)
                std::cout << "AppImage no longer exists, cleaning up resources: " << appImagePath.toStdString() << std::endl;

            if (verbose)
                std::cout << "Removing desktop file: " << desktopFilePath.toStdString() << std::endl;

            QFile(desktopFilePath).remove();