Re: [PATCH] disable grafts during fetch/push/bundle

[Jeff King <peff@peff.net>]

On Thu, Mar 06, 2014 at 11:00:08AM -0800, Junio C Hamano wrote:

> Jeff King <peff@peff.net> writes:
> 
> > I also noticed that the diff engine does not play well with replacements
> > of blobs. When we are diffing the trees, we see that the sha1 for path
> > "foo" is the same on either side, and do not look further, even though
> > feeding those sha1s to builtin_diff would fetch the replacements.
> 
> Sorry, I do not quite understand.
> 
> In "git diff A B -- path", if the object name recorded for A:path
> and B:path are the same, but the replacement mechanism maps the
> object name for that blob object to some other blob object, wouldn't
> the result be empty because both sides replace to the same thing
> anyway?

Oh, right, I was being stupid. I did:

  git replace --edit HEAD:some-file

and expected "git show" to find the diff. But that doesn't make sense.
On top of that, I need to do:

  git replace --edit HEAD^{tree}

to replace the sha1 of the entry in the tree. In which case diff would
find it just fine.

-Peff