gistfile1.txt

======= installed packages =======
"mylib-1.0-1.x86_64"
"mylib-1.0-1.i686"
==================================

--->
PackageKitBackend::fetchUpdates()

<---
PackageKitBackend::addPackageToUpdate packageId="mylib;1.1-1;x86_64;updates"
    m_updatesPackageId += packageId;
    m_packagesToAdd.insert(new PackageKitResource("mylib")) // we lose information on the arch

<---
PackageKitBackend::addPackageToUpdate packageId="mylib;1.1-1;i686;updates"
    m_updatesPackageId += packageId;
    m_packagesToAdd.insert(new PackageKitResource("mylib")) // we lose information on the arch

<---
PackageKitBackend::getUpdatesFinished
    m_packages.packages["mylib"] = m_packagesToAdd[0];
    m_packages.packages["mylib"] = m_packagesToAdd[1];
    // we overwrite one of the two Resources here because they have the same package name.
    // doesn't really affect the result because neither was tied to a specific architecture

============ state ============
m_updatesPackageId = [
                        "mylib;1.1-1;x86_64;updates",
                        "mylib;1.1-1;i686;updates"
                     ]

m_packages.packages = [
                        ("mylib", PackageKitResource*{name="mylib"} )
                      ]
===============================

--->
PackageKitUpdater::prepare
--->
PackagKitBackend::upgradeablePackages
    QSet ret;
    // loops over m_updatesPackageId
    pkgname = PackageKit::Daemon::packageName("mylib;1.1-1;x86_64;updates");    // "mylib"
    ret.unite(m_packages.packages[pkgname]);
    pkgname = PackageKit::Daemon::packageName("mylib;1.1-1;i686;updates");      // "mylib"
    ret.unite(m_packages.packages[pkgname]);
    // once again we lose one of the two packages and any information on the architecture
    return ret;
--->
PackageKitUpdater::involvedPackages packages=[ PackageKitResource*{name="mylib"} ]
    QSet packageIds;
    // loops over packages, in this case only once
    app = packages[0];
    for (const QString &pkgid : m_updatesPackageId) {
        if (TransactionpackageName(pkgid) == app.packageName()) {
            // Depending on the order of the iterator over the QSet m_updatesPackageId we either match the i686 or the x86_64 package ID
            packageIds += pkgid;
            break;
        }
    }
    return packageIds; // [ "mylib;1.1-1;i686;updates" ]
--->
PackageKit::Daemon::updatePackages pkgs=[ "mylib;1.1-1;i686;updates" ]
// this silently fails in the dnf backend, nothing gets updated.