How many Ubuntu branches share history with upstream?

[Jonathan Lange]

On Wed, Feb 10, 2010 at 2:08 PM, Jelmer Vernooij <jelmer at canonical.com> wrote:
> 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?

I'd like to use the database, since I think the other option would be
grindingly slow.

jml