Public bug reported: PPAs shipping a newer version of key system packages is a significant problem and leads to long and complex to identify bugs such as
https://bugs.launchpad.net/ubuntu/+source/ubuntu-release- upgrader/+bug/2078376 We should not upgrade systems that have replaced system packages (or added packages that become core system packages) with PPAs. My proposal basically entails the following: * Identify seeded packages as "in main or has the Task field set". This is a bit lossy as not all seeded packages have the Task field set, but it is better than nothing. Alternatively we can embed seeds? * After we have rewritten the sources and disabled third-party repositories, bail out on upgrades if any of the identified seeded packages have a higher installed version than is available in the repository; this can be done by for package in cache: if not package.current_ver: continue if not <is seeded>: continue cand = get candidate if not cand.is_downloadable: raise SomeError(f"The seeded package {package.name} is installed from a third-party repository or in an inconsistent state) (Relying on the properties that (a) if the installed version is higher than the target release, it is the candidate and (b) if we disable the third-party repositories, it is no longer downloadable) ** Affects: ubuntu-release-upgrader (Ubuntu) Importance: Undecided Status: New ** Tags: rls-oo-incoming ** Tags added: rls-oo-incoming -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2078436 Title: Reject upgrades if packages are installed in a higher version than the target release To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/2078436/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
