bzrtools upgraded to 1.9-rich-root

[Aaron Bentley]

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Robert Collins wrote:
>> In order to push in the new format, I used hitchhiker to delete the .bzr
>> directory.  When I pushed, it attempted to stack on itself, and ended up
>> dying because of infinite recursion.  This is a bzr bug. 
> 
> Did bzr on the client crash, or on the server?

Client.

> Probably we want to tell people to 'check&upgrade' remotely rather than
> delete and repush; because the former preserves all revisions and the
> latter may not.

They have to do it locally as well, or else re-branch their branch.

> In the absence of stacking this wouldn't matter, but
> with stacking it does.

Stacking doesn't care whether a revision is an ancestor of the stacked
branch's head, does it?  If it did, this wouldn't be a big concern.

> Thanks for doing this Aaron. Now we get to see what other fallout occurs
> over the next few days, and I'll generate some updated docs, and fixes
> to the bzr bugs we've got so far.

Other fallout: I had to upgrade Bundle Buggy's slushpile (basically a
branchless repository used for tracking trunks) to a rich root format.

Aaron
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