Hi Duy,

On Tue, 30 Apr 2019, Duy Nguyen wrote:

> On Tue, Apr 30, 2019 at 8:02 AM Johannes Schindelin
> <Johannes.Schindelin@gmx.de> wrote:
> >
> > Hi Duy,
> >
> > On Sun, 24 Mar 2019, Nguyễn Thái Ngọc Duy wrote:
> >
> > > While at there, move exit() back to the caller. It's easier to see the
> > > flow that way than burying it in diff-no-index.c
> >
> > I just noticed that this commit message is missing more than just a
> > trailing period. It does not explain the change of behavior: previously,
> > `GIT_EXTERNAL_DIFF=heya git diff --no-index a b` would silently ignore the
> > external diff, it would have required an explicit `--ext-diff` to pick it
> > up.
>
> Because I was not aware of the behavior change.

Well, your patch removes an early return in favor of a later return that
allows plenty of diff options to be configured in a different way than
before.

So while it is obvious (and understandable) that you were not aware of
this behavior change, the real question is what we should do about this,
now that this patch is already in `master` and on its way into v2.22.0.

Ciao,
Johannes