[arch-general] PKGBUILD "provides" not handled correctly?

[Jan Steffens]

On Tue, May 1, 2012 at 9:08 PM, Norbert Zeh <nzeh at cs.dal.ca> wrote:
> Hi folks,
>
> I have just run into a weird problem.  I have a machine that isn't too happy
> with the 3.3.x kernel series.  So I'm running linux-lts on it, but that one is
> meant for servers, so isn't as responsive as one would like on a desktop system.
> So I've decided to throw a little PKGBUILD together that compiles linux-lts with
> CONFIG_HZ set to 1000 but is otherwise unchanged from the version in ABS.
>
> To ensure this tweaked lts kernel does not get inadvertently overwritten by a
> linux-lts upgrade, I've changed the package name in the PKGBUILD to
> linux-lts-local.  I've added "linux-lts" to the conflicts/provides/replaces
> lists in the PKGBUILD to ensure that I do not install linux-lts and
> linux-lts-local at the same time and to ensure that all packages that rely on
> linux-lts continue to have their dependencies satisfied...or so I thought.
>
> Compiling the tweaked lts kernel and installing this kernel instead of linux-lts
> on my laptop with intel graphics works without problems.  My office desktop is a
> machine with an NVIDIA card and I'm using nvidia-lts as my graphics driver.
> When trying to replace linux-lts with linux-lts-local using pacman -U, pacman
> complains that nvidia-lts requires linux-lts>=3.0.0 and refuses to continue.
> Now I'm confused: linux-lts-local provides linux-lts, and the version is
> 3.0.29-1.  So why does pacman complain?  Any pointers are much appreciated.
>
> Cheers,
> Norbert

If you don't specify a version to provide, the provides will be
unversioned and fail any version comparisons.

So: provides=("linux-lts=$pkgver-$pkgrel")