suggestion for another hottest100 metric

[John Arbash Meinel]

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Robert Collins wrote:
> I don't think we do this already.
> 
> We should check that the upstream branch - whether an import or hosted -
> has common ancestry with lp:ubuntu/project
> 
> That really is the acid test for 'can be merged'.
> 
> -Rob
> 

We talked about doing that. And I think Jono wanted to write a database
query to check that. Since he thought it would be faster there. IIRC I
wrote a plugin to do the same check... (It is a bit slow because if it
isn't obvious we have to potentially walk a fair amount of history to
get to an answer.)

Though I thought with branch builder and merging just a subdirectory,
this wasn't strictly required... (Merging the packaging into upstream
doesn't require much for the actual content.)

John
=:->
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