[PATCH] virsh: Allow listing just domain IDs

[Peter Krempa]

On Tue, Oct 20, 2020 at 12:27:27 +0200, Michal Privoznik wrote:
> Some completers for libvirt related tools might want to list
> domain IDs only. Just like the one I've implemented for
> virt-viewer [1]. I've worked around it using some awk magic,
> but if it was possible to just 'virsh list --id' then I could
> drop awk.

IMO completing numeric IDs doesn't make much sense, they aren't
descriptive at all and I don't really see a point for users using them
on a commandline. If you are expanding both names and IDs then you'll
have twice as much completion suggestions on an empty string.

Is there a case where it would actually make sense? Specifically in
virsh we almost always accept id/name/UUID interchangably for a
'domain'.