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From: Junio C Hamano <gitster@pobox.com>
To: Jeff King <peff@peff.net>
Cc: trygveaa@gmail.com, git@vger.kernel.org,
	Johannes Schindelin <Johannes.Schindelin@gmx.de>,
	Jeff Hostetler <jeffhost@microsoft.com>,
	Heba Waly <heba.waly@gmail.com>
Subject: Re: [PATCH 1/2] Wait for child on signal death for aliases to builtins
Date: Mon, 06 Jul 2020 18:50:05 -0700	[thread overview]
Message-ID: <xmqqwo3g6qlu.fsf@gitster.c.googlers.com> (raw)
In-Reply-To: <20200706204106.GA85133@coredump.intra.peff.net> (Jeff King's message of "Mon, 6 Jul 2020 16:41:06 -0400")

Jeff King <peff@peff.net> writes:

> On Sun, Jul 05, 2020 at 12:18:37AM +0200, trygveaa@gmail.com wrote:
>
>> From: Trygve Aaberge <trygveaa@gmail.com>
>> 
>> When you hit ^C all the processes in the tree receives it. When a git
>> command uses a pager, git ignores this and waits until the pager quits.
>> However, when using an alias there is an additional process in the tree
>> which didn't ignore the signal. That caused it to exit which in turn
>> caused the pager to exit. This fixes that for aliases to builtins.
>> 
>> This was originally fixed in 46df6906f3 (see that for a more in
>> explanation), but broke by a regression in b914084007.
>
> Good catch. The regression is technically in b914084007, but the real
> culprit is the extra (commented out) code path added in ee4512ed48
> (trace2: create new combined trace facility, 2019-02-22).

True, as Dscho also mentioned.  I'll just do "b914084007" =>
"ee4512ed48 and b914084007" while queueing.

> Your fix here looks good, but it does make me wonder if we could avoid
> or shrink this duplicate code path. I.e., could it just do the logging
> necessary but still leave the actual process spawn to the
> execv_dashed_external() below. It may be hard to untangle, though, so
> certainly this makes sense in the meantime.

It probably is a bit more involved than a typical low hanging
fruit.  I am OK to leave this for later clean-up.

> A test would be nice, but I don't think it's very feasible for the same
> reason mentioned in 46df6906f3.

True.  Thanks.

  reply	other threads:[~2020-07-07  1:50 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-07-04 22:18 [PATCH 1/2] Wait for child on signal death for aliases to builtins trygveaa
2020-07-04 22:18 ` [PATCH 2/2] Wait for child on signal death for aliases to externals trygveaa
2020-07-06 21:14   ` Jeff King
2020-07-07  1:38     ` Junio C Hamano
2020-07-07 10:19     ` Trygve Aaberge
2020-07-07 22:06       ` Jeff King
2020-07-05  2:15 ` [PATCH 1/2] Wait for child on signal death for aliases to builtins Johannes Schindelin
2020-07-07  1:48   ` Junio C Hamano
2020-07-06 20:41 ` Jeff King
2020-07-07  1:50   ` Junio C Hamano [this message]
2020-07-07 10:23     ` Trygve Aaberge
2020-07-07 12:17 ` [PATCH v2 " trygveaa
2020-07-07 12:17   ` [PATCH v2 2/2] Wait for child on signal death for aliases to externals trygveaa

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