Support equivalent to dnf swap

[vchernin]

I recently was testing Fedora 35, and run into some WirePlumber related issues. While on traditional Fedora you can use dnf swap to switch to pipewire-media-session, there is no such thing with rpm-ostree as far as I've seen.

Could a package swap feature be implemented in rpm-ostree?

[jlebon]

Isn't that rpm-ostree override remove foo --install bar?

[vchernin]

Thanks that worked, I've added it to the above wiki page.

Maybe that example or similar could be added under override in the man page?

[jlebon]

Maybe that example or similar could be added under override in the man page?

We don't have many examples in our man pages, but we really should so 👍. Would you like to submit a patch?

[vchernin]

I can defintely submit a patch for the man page!

One question though, is there a command to undo the swap? For my case to replace wireplumber with pipewire-media-session I did rpm-ostree override remove wireplumber --install pipewire-media-session which worked as mentioned above.

Later I wanted to undo that change and switch back to wireplumber. So I tried rpm-ostree override remove pipewire-media-session --install wireplumber. However this did not work:

$ rpm-ostree status
State: idle
Deployments:
● fedora:fedora/35/x86_64/testing/silverblue
                   Version: 35.20210921.0 (2021-09-21T18:37:44Z)
                BaseCommit: 0fa700f1752476c31b76ebdb894c2a89b1cbcdd9d84eea2afa1ffbdd4df5606e
              GPGSignature: Valid signature by 787EA6AE1147EEE56C40B30CDB4639719867C58F
       RemovedBasePackages: wireplumber 0.4.2-1.fc35
           LayeredPackages: easyeffects flatpak-builder pipewire-media-session

  fedora:fedora/35/x86_64/testing/silverblue
                   Version: 35.20210921.0 (2021-09-21T18:37:44Z)
                BaseCommit: 0fa700f1752476c31b76ebdb894c2a89b1cbcdd9d84eea2afa1ffbdd4df5606e
              GPGSignature: Valid signature by 787EA6AE1147EEE56C40B30CDB4639719867C58F
           LayeredPackages: easyeffects flatpak-builder
$ rpm-ostree override remove pipewire-media-session --install wireplumber
error: "wireplumber" is already provided by: wireplumber-0.4.2-1.fc35.x86_64. Use --allow-inactive to explicitly require it.

(adding --allow-inactive wasn't a recognized option here for some reason).

and neither did rpm-ostree override reset --all:

$ rpm-ostree override reset --all
Checking out tree 0fa700f... done
Resolving dependencies... done
error: Could not depsolve transaction; 1 problem detected:
 Problem: package wireplumber-0.4.2-1.fc35.x86_64 conflicts with pipewire-session-manager provided by pipewire-media-session-0.3.37-1.fc35.x86_64
  - package pipewire-media-session-0.3.37-1.fc35.x86_64 conflicts with pipewire-session-manager provided by wireplumber-0.4.2-1.fc35.x86_64
  - conflicting requests

I eventually resorted to rpm-ostree reset which worked.

Is that expected behaviour or just a quirk of how wireplumber and pipewire-media-session were packaged?

[jlebon]

The inverse would be rpm-ostree override reset wireplumber --uninstall pipewire-media-session.

The --install and --uninstall switches were added exactly for this use case where you need a transactional package set modification that keeps all dependencies satisfied.