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From Greg Stein <gst...@gmail.com>
Subject Re: Git and Provenance
Date Wed, 09 Aug 2017 11:37:48 GMT
On Tue, Aug 8, 2017 at 10:08 AM, Daniel Shahaf <d.s@daniel.shahaf.name>

> Greg Stein wrote on Mon, 07 Aug 2017 18:51 -0500:
> > The ASF will capture email diffs and push logs of all changes made, to
> all
> > branches. These are stored in our email archives and in a push log
> > database. So provenance might not be stored entirely in the repository,
> but
> > we still have all the data (caveat: bugs in our recording).
> Isn't there a size limit on commit diffs, any commit larger than
> which isn't fully recorded in the mail archives?
> Also, trying to _use_ commit emails as a history-digging subject isn't
> going
> to be very friendly.  (You can't run log/blame on a mailing list archive)

Agreed. Friendly isn't a requirement in this case, however.

Recall that we're talking edge cases here, about proving provenance. And an
even further edge case is the ASF *defending* provenance. ... With that in
mind, my court-untested belief is that having half-a-change throws the ball
to the other side of the court. "Looks like my ICLA-covered peep committed
this change, and the ICLA says it was Proper. ... Your ball: prove

Second, the "only in an email archive" would imply it never got merged to
master/trunk/develop. Or that it got merged to a deleted release branch.
(or whatever other scenarios, I don't have in mind) ... Those are even
further edge cases.

This is where (IMO) we decide the business risk is so freakishly low, that
we do not require any operational changes to mitigate that risk. (*)


(*) and even then, we contend with other factors like intent, fraud by ICLA
signers, downstream mispackaging, or a million other things.

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