[MERGE] Enable merging PreviewTrees

Robert Collins robertc at robertcollins.net
Thu Oct 9 04:46:12 BST 2008

On Wed, 2008-10-08 at 23:11 -0400, Aaron Bentley wrote:
> This patch adds support for merging PreviewTrees into other trees.
> This
> means changing some methods to avoid using Tree.inventory, which
> PreviewTree does not supply.
> In the process, it introduces Tree.get_inventory_entry, which provides
> a
> convenient way of getting single inventory entries, without actually
> using Tree.inventory or Tree.iter_entries_by_dir.  This is a new
> requirement for Tree implementors, but Tree provides a default for
> subclasses.

I don't understand why this is preferred to accessing the inventory :-
this new method is asking for and returning an inventory entry object;
the natural home for that appears to be on the inventory object itself.


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