From: Junio C Hamano <gitster@pobox•com>
To: David Kastrup <dak@gnu•org>
Cc: Sergey Organov <sorganov@gmail•com>, git@vger•kernel.org
Subject: Re: [BUG] Documentation: git log: --exit-code undocumented?
Date: Mon, 01 Dec 2014 09:49:25 -0800 [thread overview]
Message-ID: <xmqqwq6bp8ey.fsf@gitster.dls.corp.google.com> (raw)
In-Reply-To: <874mtfl1hx.fsf@fencepost.gnu.org> (David Kastrup's message of "Mon, 01 Dec 2014 18:32:26 +0100")
David Kastrup <dak@gnu•org> writes:
> 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.
Hmph.
$ git log --exit-code master..maint >/dev/null; echo $?
0
$ git log --exit-code maint..master >/dev/null; echo $?
1
That is a strange way to use --exit-code. I suspect that if you did
this, you will get 0 from the log between HEAD~..HEAD
$ git checkout master^0
$ git commit --allow-empty -m empty
$ git log --exit-code HEAD~..HEAD
even though HEAD~ is a proper ancestor of HEAD, so it is not giving
us anything useful. Isn't it a mere artifact that "log" happens to
share the underlying machinery with "diff" that --exit-code shows a
non-zero exit when there is any single commit in the range that has
any change?
next prev parent reply other threads:[~2014-12-01 17:50 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-12-01 11:50 [BUG] Documentation: git log: --exit-code undocumented? Sergey Organov
2014-12-01 16:29 ` Junio C Hamano
2014-12-01 16:32 ` Sergey Organov
2014-12-01 16:37 ` Junio C Hamano
2014-12-01 16:43 ` Sergey Organov
2014-12-01 17:32 ` David Kastrup
2014-12-01 17:49 ` Junio C Hamano [this message]
2014-12-01 18:30 ` David Kastrup
2014-12-02 11:30 ` Sergey Organov
2014-12-02 12:27 ` John Keeping
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