[Date Prev][Date Next] [Thread Prev][Thread Next] [Date Index] [Thread Index]

Bug#746578: libpam-systemd to flip dependencies - proposal

On Sun, 2 Nov 2014 14:19:45 +0000 Ian Jackson <ijackson@chiark.greenend.org.uk> wrote:
> Ian Jackson writes ("Bug#746578: libpam-systemd to flip dependencies - proposal"):
> > Here is my draft, just committed to git.  I'm open to suggestions for
> > changes.  If we can't agree on the rationale I guess we could leave it
> > out.
> Josh Triplette produced a helpful detailed review.  Here is the
> revised draft.

s/Triplette/Triplett/ :)

And thank you for the update.

One minor (but semantically significant) issue below, caused by a typo
in my original suggestion.

> Rationale (Constitution 6.1(5)):
> 1. Currently libpam-systemd (which is pulled in by quite a few
>    dependency chains) Depends on `systemd-sysv | systemd-shim (>= 8-2)'.
> 2. The effect of this is that installing some packages which depend
>    (directly or indirectly) on libpam-systemd can cause a user's init
>    system to be switched to systemd, even on systems where a user has
>    deliberately chosen not to use the default init system, and even
>    when the switch is unnecessary.
> 3. Swappping the order of these dependencies would avoid that and has
>    no harmful effect:
> 4. In particular, on systems that already have systemd-sysv installed,
>    libpam-systemd will still not pull in systemd-shim, thus minimizing
>    the risk of breakage on systemd systems.  However, on systems that
>    intentionally do not have systemd installed, the installation of
>    libpam-systemd will then prefer to pull in systemd-shim and keep
>    the installed init system rather than switching to systemd-sysv.

s/intentionally do not have systemd/intentionally do not have systemd-sysv/

- Josh Triplett

> Decision (Constitution 6.1(4)):
> 5. We therefore overrule the decision of the maintainer of
>    libpam-systemd binary package.  The Depends entry
>       systemd-sysv | systemd-shim (>= 8-2)
>    should be replaced by 
>       systemd-shim (>= 8-2) | systemd-sysv
> 6. For the avoidance of doubt, we do not intend to set this specific
>    syntax in stone.  For example, if in future libpam-systemd needs to
>    depend on a later systemd-shim, or needs a versioned rather than
>    unversioned dependency on systemd-sysv, that is fine and would not
>    contradict our decision.
> Release (Constitution 6.1(5)):
> 7. Our advice is that this change should be in jessie.  If necessary,
>    this view should be conveyed to the Release Team, after the change
>    is in unstable, by filing an unblock request in the usual way.

Reply to: