[MERGE] Use ROOT_ID for dirstate and dirstate-tags working trees (bug #107168)

[Robert Collins]

On Fri, 2007-04-20 at 00:25 -0400, Aaron Bentley wrote:
> 
> Dirstate trees don't produce produce repositories compatible with
> Bazaar
> 0.8 and later, because dirstate uses unique roots.
> 
> While I'm a great fan of unique roots, we intended these formats to be
> network-compatible with earlier clients, so this patch causes Dirstate
> trees to use TREE_ROOT when the repository doesn't support rich root
> data.  This effectively limits it to --dirstate-with-subtree which is
> already expected to be network-incompatible with older clients. 

+1.

I think we should do a 0.15 point release with this, and ask Ubuntu to
do a Stable Release Update with it.

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