Bug#797108: init-system-helpers: deb-systemd-helper doesn't remove old links when changing WantedBy= at package upgrade

[Christian Seiler]

On 28.08.2015 04:39, Felipe Sateler wrote:
> On 27 August 2015 at 17:19, Christian Seiler <christian at iwakd.de> wrote:
>> I've also attached a trivial package in two versions to test this.
>> They change all 3 options (WantedBy=, Also= and Alias=) to test
>> everything at the same time. Just extract the source tarballs and
>> build the native packages if you want to test this.
> 
> The test packages only have test-changes.service differ, the other 2
> are the same in both versions...

Yes, sure. But the original service changes all three settings - so
I can see that all of them are affected. I only include the two
services to make sure I can change Also=, otherwise I wouldn't have
included them.

> But I checked that the link is removed if it was existing, a new one I
> created is preserved, and if I remove an enable link, then the
> disabled state is preserved to the new name (ie, when moving from
> targetA to targetB if I disable in targetA then it won't be enabled in
> targetB).

:-)

> However, (and I don't know if this is new or not), the state does not
> seem to be removed on package purge: I removed a target, purged the
> package, then reinstalled the package and the enable link was not
> generated.

That shouldn't happen. I've just tried in a Jessie VM to just
install testpkg_42, remove one of the WantedBy= links, purge it,
install it again - and then everything was recreated as expected.
On the other hand, I don't remember what you're describing while
I was testing this, so I'll look into it and try to reproduce
(and if I can, fix it). I'll probably get back to you tomorrow
on that, since I'm a bit busy today.

Christian

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