Re: Regarding "git log" on "git series" metadata

On Sat, Nov 05, 2016 at 01:45:27PM +0100, Christian Couder wrote:

And with what Peff says above it looks like we will need ways
configure and tweak commit reachability with gitlink/gitref anyway. So
the point of gitref compared to gitlink would be that they just have a
different reachability by default. But couldn't that be replaced by a
default rule saying that when a gitlink is reached "this way or that
way" then the commit reachability should be enforced, and otherwise it
should not be?

Any version of git unaware of that rule, though, would consider objects
only reachable by gitlink as unreachable and delete them, causing data
loss.  Likewise for a server not aware of that rule.  And a server
unaware of that rule would not supply those objects to a client pulling
such a branch.

So I don't think "gitlink defined as reachable" quite works, unless we
make some other format-incompatible change that forces clients and
servers touching that gitlink to know about that reachability rule.  (In
the absence of a hack such as making the same commit a parent.)