[MERGE] Improve warning to 'bzr upgrade' to specify --rich-root or --subtree if needed.

[Robert Collins]

On Tue, 2008-07-29 at 20:59 -0500, John Arbash Meinel wrote:
> 
> Also, we are trying to get people away from the -subtree format as it
> is
> more experimental than the rest. There is a "happy" side-effect that
> you
> can do "bzr init --rich-root-pack ; bzr pull ../my-subtree-repo" as
> long
> as you don't actually use subtrees.
> 
> (It is technically a bug that pull lets you do this, though you
> *could*
> argue that upgrade should work under the same conditions.)

I don't think its a bug: it's entirely appropriate to let code move
between any two repositories that can mutually safely and correctly
roundtrip. And a subtrees revision that doesn't have a subtree reference
can do this.

-Rob
-- 
GPG key available at: <http://www.robertcollins.net/keys.txt>.
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