From: David Kastrup <dak@gnu.org>
Date: Mon, 01 Dec 2014 17:32:26 GMT
Subject: Re: [BUG] Documentation: git log: --exit-code undocumented?
Message-ID: <874mtfl1hx.fsf@fencepost.gnu.org>
In-Reply-To: <xmqqegsjqqox.fsf@gitster.dls.corp.google.com>

Junio C Hamano <gitster@pobox.com> writes:

> Sergey Organov <sorganov@gmail.com> writes:
>
>> Hello,
>>
>> $ git help log | grep exit-code
>>            problems are found. Not compatible with --exit-code.
>> $
>>
>> What --exit-code does in "git log"?
>
> It doesn't.  That is why it is not listed.

I disagree that --exit-code does nothing: it indicates whether the
listed log is empty.  So for example

git log -1 --exit-code a..b > /dev/null

can be used to figure out whether "a" is a proper ancestor of "b" or
not.

-- 
David Kastrup