[Bug 2006589] Re: Anacron service and timer disabled after upgrading from 2.3-33

[Michael Hudson-Doyle]

Ugh what a mess. Well done on fighting to a solution! I have some peanut
gallery level observations:

1) can you explain in a bit more detail what happens without the
systemctl show calls in preinst? "goes wrong" is a bit ambiguous

2) Did you consider recording the results of systemctl show
--property=UnitFileState anacron.{timer,service} in preinst (guarded by
checks on $1 and $2) into /run or something and then acting on that in
postinst? It feels like it might be a bit less delicate than the
solution you have here. But maybe I'm missing something.

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https://bugs.launchpad.net/bugs/2006589

Title:
  Anacron service and timer disabled after upgrading from 2.3-33

Status in anacron package in Ubuntu:
  Confirmed

Bug description:
  As hinted by https://lists.debian.org/debian-devel-
  announce/2022/11/msg00001.html , anacron 2.3-33's packaging has a bug
  which disables both the timer and service when its postrm script is
  invoked and that includes upgrades from this package.

  We need to work-around this issue since it is the version in kinetic.

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