Public bug reported:
We should do something like:
for package in cache:
if package.is_installed and <candidate version is obsolete>:
replacement = <find a package in the archive that Conflicts/Breaks +
Replaces + Provides it>
replacement.mark_install(auto_fix=False, auto_inst=False)
replacement.mark_remove(auto_fix=False)
To hint the solver to remove the installed pre-t64 packages and install
packages replacing it. We gotta do some auto_fix, auto_inst False stuff
as we do not want to resolve the dependencies at this point, let the
upgrader work on this.
I do not believe we have to protect our choice to remove the packages
here like we did for gpg-wks-server as the packages are not updatable,
but I can't say I've checked. Potentially maybe just the mark_install
are enough since they will inevitably result in removals anyway, but
this would be easier if the removal sticks around.
** Affects: ubuntu-release-upgrader (Ubuntu)
Importance: Undecided
Status: New
** Tags: foundations-todo
** Tags added: foundations-todo
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https://bugs.launchpad.net/bugs/2061175
Title:
Handle (t64) package replacements
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