How many Ubuntu branches share history with upstream?

[Jelmer Vernooij]

On Wed, 2010-02-10 at 13:58 +0000, Jonathan Lange wrote:
> In a previous discussion about Ubuntu distributed development, someone
> suggested that we graph the number of Ubuntu branches that share
> history with upstream.
> 
> I think that's a very interesting thing to graph, but I have
> absolutely no idea on how to get that information -- even with access
> to Launchpad.
> 
> How could we do it?
The simplest thing to check would just be to see if the first revision
of the upstream branch is part of the ancestry of the packaging
branches' tip. 

Are you going to use the database for this or are you fine with calling
out to Bazaar and using the branches on disk / remote servers?

Cheers,

Jelmer
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