On Mon, Oct 15, 2012 at 6:05 PM, Matthieu Moy <Matthieu.Moy@xxxxxxxxxxxxxxx> wrote: > Angelo Borsotti <angelo.borsotti@xxxxxxxxx> writes: > >> the push command checks first if the tips of the branches match those >> of the remote references, and if it does uploads the snapshot. > > The update does two things: upload objects to the database, and then > update the reference. Adding objects to the database does not change the > repository until the objects are reachable from a ref. Updating the ref > is usually done giving the expected old sha1, and locks the ref, so it > can't change in the meantime. > > I don't know this part of the code very well, but check refs.c for the C > part, and "git update-ref" for the plumbing interface. I think it's lock_any_ref_for_update(), which is called inside refs.c:update_ref(). -- Duy -- To unsubscribe from this list: send the line "unsubscribe git" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html