[Pkg-raspi-maintainers] Bug#1092279: rpi.gpio-common: /usr/lib/udev/rules.d/60-rpi.gpio-common.rules may get lost in upgrade due to /usr-move (DEP17)

[Michael Biebl]

Hi Dominik,

poking you directly as I'm not sure if you received this RC bug mail.

Regards,
Michael

On Mon, 6 Jan 2025 13:43:46 +0100 Helmut Grohne <helmut at subdivi.de> wrote:
> Package: rpi.gpio-common
> Version: 0.7.1~a4-1.1
> Severity: serious
> Justification: file loss in upgrade
> Tags: trixie sid
> User: helmutg at debian.org
> Usertags: dep17p7
> User: debian-arm at lists.debian.org
> Usertags: armel armhf arm64
> X-Debbugs-Cc: zeha at debian.org
> 
> In an an upgrade from bookworm to trixie, rpi.gpio-common may loose
> /usr/lib/udev/rules.d/60-rpi.gpio-common.rules, because it is a file
> shared in a Multi-Arch: same package and being moved from /lib to
> /usr/lib during the upgrade. For more information refer to
> https://subdivi.de/~helmut/dep17.html section P7.
> 
> As I was wondering about a good way to fix this, I failed to find a
> reason for rpi.gpio-common to exist as a separate package from
> python3-rpi.gpio. I was made aware that there formerly was a Python 2
> package that would benefit from a -common package sharing the udev rules
> file, but now no such package exists anymore. This leaves the question
> of whether you would prefer keeping (and fixing) the rpi.gpio-common
> package or merging its content into python3-rpi.gpio (thus reducing the
> number of packages in the archive for good).
> 
> In case you want to keep rpi.gpio-common, allow me to suggest dropping
> Multi-Arch: same for one release. You cannot actually coinstall
> python3-rpi.gpio, so coinstalling rpi.gpio-common is of very limited
> use. I guess that the Multi-Arch hinter opportunistically suggested
> adding Multi-Arch: same, but here it is one precondition to actually
> loosing the file. A very simple way of working around the problem at
> hand could be:
> 
> -Multi-Arch: same
> +# begin-remove-after: released:trixie
> +# Avoid being Multi-Arch: same for the trixie upgrade to avoid a DEP17
> +# P7 file loss of the udev fules file being moved from /lib to /usr/lib.
> +Multi-Arch: no
> +# end-remove-after
> 
> I offer writing a patch (including the workarounds for the /usr-move)
> for the other ways. Please let me know if you want to accept my offer
> and indicate which path you prefer.
> 
> Helmut
> 
> 
> 
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