Re: [PATCH v2] pack-objects: Allow missing base objects when creating thin packs

> If we are building a thin pack and one of the base objects we would
> consider for deltification is missing its OK, the other side already
> has that base object.  We may be able to get a delta from another
> object, or we can simply send the new object whole (no delta).
> 
> This change allows a shallow clone to store only the objects which
> are unique to it, as well as the boundary commit and its trees, but
> avoids storing the boundary blobs.  This special form of a shallow
> clone is able to represent just the difference between two trees.
> 
> Pack objects change suggested by Nicolas Pitre.
> 
> Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
> ---
> 
>  Nicolas Pitre <nico@cam.org> wrote:
>  > On Tue, 12 Aug 2008, Shawn O. Pearce wrote:
>  > I'm not talking about the last command but the "test $(git rev-parse 
>  > HEAD) = $B" line.
>  
>  Oh, right.  Good catch.

> +++ b/t/t5306-pack-nobase.sh
> @@ -0,0 +1,80 @@
> +#!/bin/sh
> +#
> +# Copyright (c) 2008 Google Inc.