Re: [PATCH 2/4] refs: trim newline from reflog message

[Han-Wen Nienhuys <hanwen@google.com>]

On Wed, Nov 24, 2021 at 8:27 PM Junio C Hamano <gitster@pobox.com> wrote:
>
> Han-Wen Nienhuys <hanwen@google.com> writes:
>
> > $ GIT_TRACE_REFS="1" git branch -m bla blub
> > ..
> > 12:03:59.408705 refs/debug.c:162        rename_ref: refs/heads/bla ->
> > refs/heads/blub "Branch: renamed refs/heads/bla to refs/heads/blub": 0
> >
> > $ GIT_TRACE_REFS=1 git reflog show refs/heads/blub
> > 12:04:23.277805 refs/debug.c:294        reflog_ent refs/heads/blub
> > (ret 0): cd3e606211bb1cf8bc57f7d76bab98cc17a150bc ->
> > cd3e606211bb1cf8bc57f7d76bab98cc17a150bc, Han-Wen Nienhuys
> > <hanwen@google.com> 1637751839 "Branch: renamed refs/heads/bla to
> > refs/heads/blub
> > "
> >
> >> I think the rule for "msg" is that:
> >>
> >>    a multi-line message, or a message on a single incomplete-line,
> >>    are normalized into a single complete line, and callback gets a
> >>    single complete line.
> >>
> >
> > That is not how it works today. The files backend verbatimly dumps the
> > message supplied to it. (Maybe it should crash if there is a '\n' in
> > the message).
>
> I still am puzzled what you wanted to illustrate with the "git
> branch -m bla" trace.

I'm trying to illustrate that (from the perspective of the ref backend
API) one call inserts something without a '\n', but the call that
reads the info back, gets the same data back with a '\n'. It looks
confusing and inconsistent to me.

It seems fine to decide that the message should always end in a LF,
but then why not do that in the normalization routine, so it is shared
across all backends?

For the purpose of the debug support (GIT_TRACE_REFS=1), I would
rather prefer if the message was always without LF, because the LF
ruins the visual of the debug output, but that is a minor concern.

-- 
Han-Wen Nienhuys - Google Munich
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