[RFC] Make diffstat work with bazaar 1.5

[Aaron Bentley]

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Russ Brown wrote:
> On the surface it sounds like what is needed is some API that takes two
> trees and returns some abstract representation of the diff between the
> two trees. I'm sure it's way more complicated than that though...
> 
> Does such an abstract diff representation exist already, I wonder?

Tree.iter_changes.  That will give you the tree-level diff, without
diffing the contents of the files.

Aaron
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