Bug#918726: printer-driver-gutenprint: PPD files not updated during upgrade of printer-driver-gutenprint

[Didier Raboud <odyx@debian.org>]

Le 10.01.2019 09:22, Till Kamppeter a écrit :
> On 10/01/2019 08:56, Didier 'OdyX' Raboud wrote:
> > > 'cups-genppdupdate -x' and restarting cups fixed the problem (-x 
> > > allows
> > > update across major Gutenprint releases).
> > Till: it seems that our trigger is not enough for these.  Opinions?
>
> For me it looks like that our trigger needs to run "cups-genppdupdate
> -x" instead of simply "cups-genppdupdate".

Well, the CUPS trigger doesn't run "cups-genppdupdate" at all:

https://sources.debian.org/src/cups/2.2.10-3/debian/cups.postinst/#L78

> The "-x" is needed only once for the transition of major versions. So
> one could perhaps also do a "-x" in postinst depending on the old and
> new version number and leave the trigger unchanged.

I implemented it this way:

if [ "$1" = configure ] && dpkg --compare-versions "$2" lt-nl 5.3.1-7~; 
then
    # Force upgrade of gutenprint PPDs accross major versions
    cups-genppdupdate -x
fi


So any upgrade from before the current version will get the -x 
treatment
(that's to do it for unstable users with broken PPDs).

I don't think we should be modifying CUPS' trigger code specifically 
for
gutenprint.  If gutenprint needs different treatment, let's make it 
happen
in gutenprint, no?

Cheers,
Didier