Description of problem:
dnf apparently has not been sufficiently integrated into Fedora to replace yum:
# dnf remove /usr/bin/yum
Package Arch Version Repository Size
bodhi-client noarch 0.9.12.2-1.fc22 @System 26 k
corsepiu-rtems-release noarch 21.20150207.0-1.fc22 @System 2.4 k
corsepiu-testing-release noarch 21.20150207.0-1.fc22 @System 2.4 k
cpanspec noarch 1.78-19.fc22 @System 70 k
createrepo noarch 0.10.3-3.fc21 @System 301 k
dnf-yum noarch 0.6.5-1.fc22 @System 24 k
fedora-packager noarch 0.5.10.5-1.fc22 @System 80 k
fedora-upgrade noarch 22.1-1.fc22 @System 46 k
fedpkg noarch 1.20-1.fc22 @System 72 k
fedup noarch 0.9.2-1.fc22 @System 258 k
libguestfs x86_64 1:1.29.33-1.fc22 @System 3.6 M
libguestfs-tools noarch 1:1.29.33-1.fc22 @System 57 k
libguestfs-tools-c x86_64 1:1.29.33-1.fc22 @System 13 M
mock noarch 1.2.7-1.fc22 @System 928 k
mock-fedora-21 noarch 0.20150302.0-0.fc22 @System 11 k
mock-fedora-22 noarch 0.20150302.0-0.fc22 @System 11 k
perl-Sys-Guestfs x86_64 1:1.29.33-1.fc22 @System 1.2 M
pyrpkg noarch 1.33-1.fc22 @System 363 k
python-dnf-plugins-extras-migrate noarch 0.0.7-1.fc22 @System 25 k
supermin x86_64 5.1.12-1.fc22 @System 1.7 M
system-config-kickstart noarch 2.9.3-1.fc22 @System 2.0 M
yum noarch 3.4.3-505.fc22 @System 5.6 M
yum-langpacks noarch 0.4.5-1.fc22 @System 66 k
yum-utils noarch 1.1.31-505.fc22 @System 327 k
Remove 24 Packages
yum to de-installable
IMO, this alone should be sufficient reason to revert the decision to make dnf the installer in Fedora 22. dnf very obviously is not ready to be deployed.
Note that there is no package in default installation of any Fedora product that depends on yum, it's quite the opposite actually - quite a few core components depend on dnf. This alone is a reason not to revert the decision, as dnf can't be removed from the default Fedora installation.
That being said, out of your list, we can safely filter out 8 packages as clearly irrelevant: corsepiu-rtems-release, corsepiu-testing-release, yum, yum-langpacks, yum-utils, dnf-yum, python-dnf-plugins-extras-migrate, createrepo
Another three can be removed as already fixed upstream and soon to be fixed in Fedora: mock, mock-fedora-21, mock-fedora-22
Eight more packages do not directly depend on yum: cpanspec, fedora-packager, fedpkg, libguestfs, libguestfs-tools,libguestfs-tools-c, perl-Sys-Guestfs and pyrpkg
Two packages don't need to be ported before F23 is available at least as alpha: fedora-upgrade, fedup
There are three remaining packages that have dependency on yum: bodhi-client, supermin, system-config-kickstart. Note that supermin is currently being ported to dnf, I'm not sure about the rest. Would you say any of those packages is critical to a common Fedora installation and why?
> That being said, out of your list, we can safely filter out 8 packages as
> clearly irrelevant: corsepiu-rtems-release, corsepiu-testing-release,
These 2 contain packages the /etc/yum.repo.d/*.conf of my local repos.
These packages carry "Requires: yum >= 2.0" for historical reasons, because yum's *.repo format had changed incompatibly long time ago.
With dnf having failed to be a 1:1 replacement for yum, this now causes a dep on yum. To work-around this issue, I have now taken out these deps.
> Eight more packages do not directly depend on yum: cpanspec, fedora-packager, > fedpkg, libguestfs, libguestfs-tools,libguestfs-tools-c, perl-Sys-Guestfs and > pyrpkg
> bodhi-client, supermin, system-config-kickstart
I do not agree on these - These are proof of dnf being deployed prematurely.
In other words: You failed to accomplish your mission and are violently abusing the Fedora users community as Guinea Pigs to fix your bugs.
> Would you say any of those packages is critical to a common Fedora
> installation and why
supermin to me is a dependency being pulled in by the libvirt/libguestfs-infrastructure (I have VMs on this machine).
system-config-kickstart is an essential tool for sys-admins. Not having ported it to dnf is a serious mistake.
bodhi-client is part of the dependency chain being pulled in through fedpkg and fedora-packagers (Remember Fedora once was a developer-oriented distro!)
Similar considerations apply to cpanspec, repoquery etc.
It's part of my rationale to call the decision to make dnf the default on fedora 22 premature and to be management mistake.
Or to cut a long story short: dnf is not ready for prime time. It's time to draw serious decisions!
Thanks for your opinion, Ralf. Most of the Fedora users will have just DNF installed. Right, a few not so popular plugins / yum utils has not been ported yet - in this case you can still install yum (we will get rid of yum requirements completely in the future). We don't break anything. We actually made sure dnf does not conflict with yum to let these packages be installed if anyone wants to. Marking as duplicate of yum-utils migration tracker bug...
*** This bug has been marked as a duplicate of bug 1156491 ***
(In reply to Jan Silhan from comment #3)
> Thanks for your opinion, Ralf. Most of the Fedora users will have just DNF
> installed. Right, a few not so popular plugins / yum utils has not been
> ported yet
=> Your work is incomplete.
=> DNF is not ready
=> You guys are cheating and lying about DNFs shape.
> - in this case you can still install yum (we will get rid of yum
> requirements completely in the future). We don't break anything.
Again, you are not telling the truth - In fact _you_ broke a lot!!
> We actually
> made sure dnf does not conflict with yum to let these packages be installed
> if anyone wants to. Marking as duplicate of yum-utils migration tracker
The situation is becoming increasingly absurd: The most recent changes to mock made dnf mandatory on F21!
> > - in this case you can still install yum (we will get rid of yum
> > requirements completely in the future). We don't break anything.
> Again, you are not telling the truth - In fact _you_ broke a lot!!
Could you provide examples of what doesn't work when dnf and yum are installed in parallel? That might be worth looking into.
> The situation is becoming increasingly absurd: The most recent changes to
> mock made dnf mandatory on F21!
That's not our fault, please don't blame us for something we didn't cause.