From mboxrd@z Thu Jan  1 00:00:00 1970
From: Junio C Hamano <gitster@pobox.com>
Subject: Re: git should not use a default user.email config value
Date: Wed, 14 Aug 2013 07:00:58 -0700
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Cc: Jeff King <peff@peff.net>, Andrew Ardill <andrew.ardill@gmail.com>,
	Michael Haggerty <mhagger@alum.mit.edu>,
	Jonathan Nieder <jrnieder@gmail.com>,
	Thorsten Glaser <tg@mirbsd.de>,
	"git@vger.kernel.org" <git@vger.kernel.org>
To: Matthieu Moy <Matthieu.Moy@grenoble-inp.fr>
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On Wed, Aug 14, 2013 at 1:37 AM, Matthieu Moy
<Matthieu.Moy@grenoble-inp.fr> wrote:
>
> Jeff King <peff@peff.net> writes:
>
> > This whole discussion is basically implementing conditional config.
> > [...] The problem is that it would be tricky to do in a
> > backwards-compatible way.
>
> That could be done with "conditional comments" like
>
> # if <some-condition> then
> [core]
>         pager = less
> # endif
>
> That's rather ugly, and the implementation would be even more ugly, but
> backward-compatible.


I highly doubt that you would want to be "backward compatible" in this
case, though.
The section of the configuration you are enclosing the new if/endif
syntax may be
understood only by newer Git (e.g. imagine core.pager is still
bool-only today), and
older Git that do not understand if/endif syntax will happily read
that section and
choke on it, no?