[Libguestfs] Handling different architectures in virt-builder

[Pino Toscano]

On Friday 14 February 2014 16:19:39 Richard W.M. Jones wrote:
> On Fri, Feb 14, 2014 at 03:48:34PM +0100, Pino Toscano wrote:
> > a) adding arch=.. keys in entries
> > b) rename (or just copy, to avoid breaking older virt-builders) keys
> > to> 
> >    $distro-$version-$arch
> > 
> > c) to not break compatibility with user input virt-builder joins
> > 
> >    $user_selection + $arch = $user_selection-$arch, and looks in the
> >    index
> > 
> > d) default $arch to `uname -m/p`, if --arch is not specified
> 
> os-version is a unique key in the index today, but does it need to be?
> You could have multiple os-version entries differing only by at least
> the following fields:
> 
> . revision
> . arch
> . format
> 
> So your unique key internally in virt-builder would be (os-version,
> revision, arch, format) ...

Sure, changing the key is not actually an issue by itself; the issue 
comes up whether we want the "new" indexes to be usable by older
virt-builders, which want os-version as unique key.

OTOH, if we switch to the virt-builder.d/*.conf configuration files, 
those would need to be written anew, so could automatically gain new 
features incompatible with older virt-builders.

-- 
Pino Toscano