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From:   Eric Sunshine <sunshine@sunshineco.com>
Date:   Wed, 3 Nov 2021 12:48:19 -0400
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Subject: Re: [PATCH v2] var: add GIT_DEFAULT_BRANCH variable
To:     Jeff King <peff@peff.net>
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        =?UTF-8?Q?Thomas_Wei=C3=9Fschuh?= <thomas@t-8ch.de>,
        Git List <git@vger.kernel.org>,
        Johannes Schindelin <Johannes.Schindelin@gmx.de>
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On Wed, Nov 3, 2021 at 7:37 AM Jeff King <peff@peff.net> wrote:
> I.e., I don't think introducing a new variable into "git var" is that
> big a deal. They don't have to be related to an environment variable;
> the documentation calls them "logical variables". This is exactly the
> kind of thing it's designed for.

I almost don't want to mention it since it's not very discoverable
(and is never the first place I think to look), but git-rev-parse
already contains a grab-bag of options unrelated to revision parsing.
Many of the options relate to querying paths (--show-toplevel,
--show-cdup, etc.) or other information related to a repository
(--local-env-vars, --show-object-format, etc.). So, adding
--show-default-branch may be one possibility.