[MERGE] apply_inventory_delta

[Aaron Bentley]

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John Arbash Meinel wrote:
> Aaron Bentley wrote:
>> IIRC, the "action" object used to control whether the operation was a
>> dry run or not.
> 
> It did. IIRC it changed because it was causing us to search around all
> the time because we had to make sure parents were added before children.

Could be.  Switching to the apply_inventory_delta approach would mean we
 wouldn't care about ordering, so long as all parents were added.

> It actually seems like it would be good to have another api like
> "iter_changes". 'smart_add' basically just needs an 'iter_unknowns', and
> do something with them.

The difference from iter_changes is that it would list unknowns
recursively?  What about ignored files?

Aaron
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