From: Junio C Hamano <gitster@pobox.com>
To: "Ævar Arnfjörð Bjarmason" <avarab@gmail.com>
Cc: Jeff King <peff@peff.net>, Taylor Blau <me@ttaylorr.com>,
git@vger.kernel.org,
Felipe Contreras <felipe.contreras@gmail.com>
Subject: Re: [PATCH] Makefile: add and use the ".DELETE_ON_ERROR" flag
Date: Tue, 29 Jun 2021 14:38:44 -0700 [thread overview]
Message-ID: <xmqqv95wuza3.fsf@gitster.g> (raw)
In-Reply-To: 875yxxgkav.fsf@evledraar.gmail.com
Ævar Arnfjörð Bjarmason <avarab@gmail.com> writes:
> Even if you don't care about the end result or making git easier to hack
> on for people who don't share your setup, I'd think that making those
> rules consistent across the board makes things less complex, not more.
I think that it is where we disagree. "Remove $@+ and $@, generate
into $@+ and then move it to $@" idiom has a legitimate reason to be
used, and I do not want to see it blindly used where there is no
reason to do so. It misleads less experienced readers.
If we write a custom script that does not promise atomicity, it is a
quite natural pattern to use, and it is clear to readers what is
going on, especially when "generate into $@+" step is done via
redirection. I despise "$(CC) -o $@+ && mv $@+ $@" because there
simply shouldn't be a need to do so---unlike our custom script that
sends its output to its standard output, $(CC) ought to know better.
But as you said elsewhere, the patch in question is *not* about
adding more use of "mv $@+ $@" in inappropriate contexts, so let's
stop discussing it now. We take advantage of .DELETE_ON_ERROR that
allows us to use the upfront "rm -f $@ $@+" we do in the idiom,
which is a good thing.
next prev parent reply other threads:[~2021-06-29 21:38 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-22 14:13 [PATCH] Makefile: add and use the ".DELETE_ON_ERROR" flag Ævar Arnfjörð Bjarmason
2021-06-22 15:27 ` Taylor Blau
2021-06-22 17:34 ` Ævar Arnfjörð Bjarmason
2021-06-22 19:17 ` Jeff King
2021-06-23 19:54 ` Ævar Arnfjörð Bjarmason
2021-06-23 22:21 ` Jeff King
2021-06-24 13:53 ` Ævar Arnfjörð Bjarmason
2021-06-24 14:49 ` Jeff King
2021-06-25 9:49 ` Ævar Arnfjörð Bjarmason
2021-06-29 2:26 ` Jeff King
2021-06-29 6:19 ` Junio C Hamano
2021-06-29 7:39 ` Ævar Arnfjörð Bjarmason
2021-06-29 21:38 ` Junio C Hamano [this message]
2021-06-30 2:23 ` Jeff King
2021-07-01 3:54 ` Felipe Contreras
2021-07-01 13:34 ` Ævar Arnfjörð Bjarmason
2021-07-03 0:41 ` Felipe Contreras
2021-07-03 12:31 ` Ævar Arnfjörð Bjarmason
2021-07-03 18:42 ` Felipe Contreras
2021-06-23 19:15 ` Felipe Contreras
2021-06-23 19:09 ` Felipe Contreras
2021-06-23 19:01 ` Felipe Contreras
2021-06-23 19:45 ` Ævar Arnfjörð Bjarmason
2021-06-23 20:32 ` Felipe Contreras
2021-06-29 7:29 ` Ævar Arnfjörð Bjarmason
2021-07-01 3:06 ` Felipe Contreras
2021-06-23 19:21 ` Felipe Contreras
2021-06-23 19:59 ` Ævar Arnfjörð Bjarmason
2021-06-23 20:52 ` Felipe Contreras
2021-06-29 8:17 ` Ævar Arnfjörð Bjarmason
2021-07-01 3:19 ` Felipe Contreras
2021-06-29 8:44 ` [PATCH v2] " Ævar Arnfjörð Bjarmason
2021-08-18 21:36 ` [PATCH] Makefile: remove archives before manipulating them with 'ar' SZEDER Gábor
2021-08-19 23:39 ` Junio C Hamano
2021-09-01 17:06 ` Ævar Arnfjörð Bjarmason
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