Method getVersionForLoader

launcher/modplatform/atlauncher/ATLPackInstallTask.cpp:337–394

}

QString PackInstallTask::getVersionForLoader(QString uid)
{
    if(m_version.loader.recommended || m_version.loader.latest || m_version.loader.choose) {
        auto vlist = APPLICATION->metadataIndex()->get(uid);
        if(!vlist)
        {
            emitFailed(tr("Failed to get local metadata index for %1").arg(uid));
            return Q_NULLPTR;
        }

        if(!vlist->isLoaded()) {
            vlist->load(Net::Mode::Online);
        }

        if(m_version.loader.recommended || m_version.loader.latest) {
            for (int i = 0; i < vlist->versions().size(); i++) {
                auto version = vlist->versions().at(i);
                auto reqs = version->required();

                // filter by minecraft version, if the loader depends on a certain version.
                // not all mod loaders depend on a given Minecraft version, so we won't do this
                // filtering for those loaders.
                if (m_version.loader.type != "fabric") {
                    auto iter = std::find_if(reqs.begin(), reqs.end(), [](const Meta::Require &req) {
                        return req.uid == "net.minecraft";
                    });
                    if (iter == reqs.end()) continue;
                    if (iter->equalsVersion != m_version.minecraft) continue;
                }

                if (m_version.loader.recommended) {
                    // first recommended build we find, we use.
                    if (!version->isRecommended()) continue;
                }

                return version->descriptor();
            }

            emitFailed(tr("Failed to find version for %1 loader").arg(m_version.loader.type));
            return Q_NULLPTR;
        }
        else if(m_version.loader.choose) {
            // Fabric Loader doesn't depend on a given Minecraft version.
            if (m_version.loader.type == "fabric") {
                return m_support->chooseVersion(vlist, Q_NULLPTR);
            }

            return m_support->chooseVersion(vlist, m_version.minecraft);
        }
    }

    if (m_version.loader.version == Q_NULLPTR || m_version.loader.version.isEmpty()) {
        emitFailed(tr("No loader version set for modpack!"));
        return Q_NULLPTR;
    }

    return m_version.loader.version;
}