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From: Eric Sunshine <sunshine@sunshineco.com>
To: Eric Wong <e@80x24.org>
Cc: "Eric Sunshine via GitGitGadget" <gitgitgadget@gmail.com>,
	"Git List" <git@vger.kernel.org>, "Jeff King" <peff@peff.net>,
	"Elijah Newren" <newren@gmail.com>,
	"Ævar Arnfjörð Bjarmason" <avarab@gmail.com>,
	"Fabian Stelzer" <fs@gigacodes.de>,
	"Johannes Schindelin" <Johannes.Schindelin@gmx.de>
Subject: Re: [PATCH 06/18] chainlint.pl: validate test scripts in parallel
Date: Tue, 6 Sep 2022 18:52:26 -0400	[thread overview]
Message-ID: <CAPig+cSx661-HEr3JcAD5MuYfgHviGQ1cSAftkgw6gj2FgTQVg@mail.gmail.com> (raw)
In-Reply-To: <20220906223537.M956576@dcvr>

On Tue, Sep 6, 2022 at 6:35 PM Eric Wong <e@80x24.org> wrote:
> Eric Sunshine via GitGitGadget <gitgitgadget@gmail.com> wrote:
> > +unless ($Config{useithreads} && eval {
> > +     require threads; threads->import();
>
> Fwiw, the threads(3perl) manpage has this since 2014:
>
>        The use of interpreter-based threads in perl is officially discouraged.

Thanks for pointing this out. I did see that, but as no better
alternative was offered, and since I did want this to work on Windows,
I went with it.

> I was bummed, too :<  but I've decided it wasn't worth the
> effort to deal with the problems threads could cause down the
> line in future Perl versions.  For example, common libraries
> like File::Temp will chdir behind-the-scenes which is
> thread-unsafe.
>
> (of course I only care about *BSD and Linux on MMU hardware,
> so I use SOCK_SEQPACKET and fork() freely :>)

I'm not overly worried about the deprecation at the moment since (1)
chainlint.pl isn't a widely used script -- it's audience is very
narrow; (2) the `$Config{useithreads}` conditional can be seen as an
automatic escape-hatch, and (if need be) I can even make `--jobs=1` be
an explicit escape hatch, and there's already --no-chain-lint for an
extreme escape-hatch; (3) the script is pretty much standalone -- it
doesn't rely upon any libraries like File::Temp or others; (4) Ævar
has ideas for using the Makefile for parallelism instead; (5) we can
cross the deprecation-bridge when/if it actually does become a
problem, either by dropping parallelism from chainlint.pl or by
dropping chainlint.pl itself.

  reply	other threads:[~2022-09-06 22:52 UTC|newest]

Thread overview: 51+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-09-01  0:29 [PATCH 00/18] make test "linting" more comprehensive Eric Sunshine via GitGitGadget
2022-09-01  0:29 ` [PATCH 01/18] t: add skeleton chainlint.pl Eric Sunshine via GitGitGadget
2022-09-01 12:27   ` Ævar Arnfjörð Bjarmason
2022-09-02 18:53     ` Eric Sunshine
2022-09-01  0:29 ` [PATCH 02/18] chainlint.pl: add POSIX shell lexical analyzer Eric Sunshine via GitGitGadget
2022-09-01 12:32   ` Ævar Arnfjörð Bjarmason
2022-09-03  6:00     ` Eric Sunshine
2022-09-01  0:29 ` [PATCH 03/18] chainlint.pl: add POSIX shell parser Eric Sunshine via GitGitGadget
2022-09-01  0:29 ` [PATCH 04/18] chainlint.pl: add parser to validate tests Eric Sunshine via GitGitGadget
2022-09-01  0:29 ` [PATCH 05/18] chainlint.pl: add parser to identify test definitions Eric Sunshine via GitGitGadget
2022-09-01  0:29 ` [PATCH 06/18] chainlint.pl: validate test scripts in parallel Eric Sunshine via GitGitGadget
2022-09-01 12:36   ` Ævar Arnfjörð Bjarmason
2022-09-03  7:51     ` Eric Sunshine
2022-09-06 22:35   ` Eric Wong
2022-09-06 22:52     ` Eric Sunshine [this message]
2022-09-06 23:26       ` Jeff King
2022-11-21  4:02         ` Eric Sunshine
2022-11-21 13:28           ` Ævar Arnfjörð Bjarmason
2022-11-21 14:07             ` Eric Sunshine
2022-11-21 14:18               ` Ævar Arnfjörð Bjarmason
2022-11-21 14:48                 ` Eric Sunshine
2022-11-21 18:04           ` Jeff King
2022-11-21 18:47             ` Eric Sunshine
2022-11-21 18:50               ` Eric Sunshine
2022-11-21 18:52               ` Jeff King
2022-11-21 19:00                 ` Eric Sunshine
2022-11-21 19:28                   ` Jeff King
2022-11-22  0:11                   ` Ævar Arnfjörð Bjarmason
2022-09-01  0:29 ` [PATCH 07/18] chainlint.pl: don't require `return|exit|continue` to end with `&&` Eric Sunshine via GitGitGadget
2022-09-01  0:29 ` [PATCH 08/18] t/Makefile: apply chainlint.pl to existing self-tests Eric Sunshine via GitGitGadget
2022-09-01  0:29 ` [PATCH 09/18] chainlint.pl: don't require `&` background command to end with `&&` Eric Sunshine via GitGitGadget
2022-09-01  0:29 ` [PATCH 10/18] chainlint.pl: don't flag broken &&-chain if `$?` handled explicitly Eric Sunshine via GitGitGadget
2022-09-01  0:29 ` [PATCH 11/18] chainlint.pl: don't flag broken &&-chain if failure indicated explicitly Eric Sunshine via GitGitGadget
2022-09-01  0:29 ` [PATCH 12/18] chainlint.pl: complain about loops lacking explicit failure handling Eric Sunshine via GitGitGadget
2022-09-01  0:29 ` [PATCH 13/18] chainlint.pl: allow `|| echo` to signal failure upstream of a pipe Eric Sunshine via GitGitGadget
2022-09-01  0:29 ` [PATCH 14/18] t/chainlint: add more chainlint.pl self-tests Eric Sunshine via GitGitGadget
2022-09-01  0:29 ` [PATCH 15/18] test-lib: retire "lint harder" optimization hack Eric Sunshine via GitGitGadget
2022-09-01  0:29 ` [PATCH 16/18] test-lib: replace chainlint.sed with chainlint.pl Eric Sunshine via GitGitGadget
2022-09-03  5:07   ` Elijah Newren
2022-09-03  5:24     ` Eric Sunshine
2022-09-01  0:29 ` [PATCH 17/18] t/Makefile: teach `make test` and `make prove` to run chainlint.pl Eric Sunshine via GitGitGadget
2022-09-01  0:29 ` [PATCH 18/18] t: retire unused chainlint.sed Eric Sunshine via GitGitGadget
2022-09-02 12:42   ` several messages Johannes Schindelin
2022-09-02 18:16     ` Eric Sunshine
2022-09-02 18:34       ` Jeff King
2022-09-02 18:44         ` Junio C Hamano
2022-09-11  5:28 ` [PATCH 00/18] make test "linting" more comprehensive Jeff King
2022-09-11  7:01   ` Eric Sunshine
2022-09-11 18:31     ` Jeff King
2022-09-12 23:17       ` Eric Sunshine
2022-09-13  0:04         ` Jeff King

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