Backporting shibboleth-sp2 2.6.0+dfsg1-4 to jessie: dh-systemd, piuparts and lintian errors

[Niels Thykier]

Etienne Dysli-Metref:
> On 17/01/17 18:30, Niels Thykier wrote:
>>>> E: libshibsp7: postinst-must-call-ldconfig usr/lib/x86_64-linux-gnu/libshibsp.so.7.0.0
>>
>> This lintian error:
>>
>>  * is aimed at stretch or later, and
>>  * should be ignored for stable and stable-backports

Correction; I was wrong - this lintian error is correct for a lintian
from stable (I confused it with a newer lintian tag).

This occurs because you are using debhelper from backports, which uses a
trigger instead of maintscript to call ldconfig.  The end result is the
same for you though - ignore the warning. :)

> 
> After having overridden this lintian error, it turns out it was a bit of
> a red herring: piuparts still reports files left after purging.
> 
> [...]

Correct, this lintian warning is completely unrelated to your piuparts
issue.

> 
> So is the postrm script from shibboleth-sp2-utils not executed?
> 

It is definitely called - if it wasn't, almost everything would be
failing on piuparts.d.o and dpkg in stable would completely an utterly
broken with us drowning in RC bugs. :)

Most likely, there is an issue with either the postrm script OR the
helpers used in it.  I am not an expert on the helpers, so I cannot help
there.

Thanks,
~Niels