From: Matthieu Moy <matthieu.moy@grenoble-inp.fr>
Date: Fri, 09 Nov 2012 15:52:48 GMT
Subject: Re: git merge commits are non-deterministic? what changed?
Message-ID: <vpq390idb8v.fsf@grenoble-inp.fr>
In-Reply-To: <20121109154245.GP69724@acme.spoerlein.net>

Ulrich Spörlein <uqs@spoerlein.net> writes:

>> > 2. Why the hell is the commit hash dependent on the ordering of the
>> > parent commits? IMHO it should sort the set of parents before
>> > calculating the hash ...
>> 
>> What would be the sort key?
>
> Trivially, the hash of the parents itself. So you'd always get
>
> ...
> parent 0000
> parent 1111
> parent aaaa
> parent ffff

That would change the behavior of --first-parent. Or you'd need to
compute the sha1 of the sorted list, but keep the unsorted one in the
commit. Possible, but weird ;-).

-- 
Matthieu Moy
http://www-verimag.imag.fr/~moy/