[MERGE] Repository format 1.9

[Martin Pool]

On Wed, Oct 29, 2008 at 12:29 PM, John Arbash Meinel
<john at arbash-meinel.com> wrote:
> I think it would be great to discuss why it isn't yet. Last I remember
> Aaron and Robert hadn't quite settled on what was necessary.
>
> I would be fine having 1.9 be rich root only if it is ready for it.

I think that would be great too.  I believe at one point the issue was
to do with roundtripping between rich-root and non-rich-root
repositories, but at this point I'd probably be fine to make it just a
one-way operation: when someone upgrades, others must too.

Also a bit OT, should we change the default format in 1.9, or later?
Bringing it up to 1.6 would avoid some hassles in creating stacked
branches.  However, adding a new format but changing the default to
something older would be a bit bizarre or confusing - though
understandable in terms of avoiding creating data that can only be
read by the latest release.

-- 
Martin <http://launchpad.net/~mbp/>