From: "SZEDER Gábor" <szeder.dev@gmail.com>
To: Jeff King <peff@peff.net>
Cc: "Ævar Arnfjörð Bjarmason" <avarab@gmail.com>,
"Duy Nguyen" <pclouds@gmail.com>,
"Rohit Ashiwal via GitGitGadget" <gitgitgadget@gmail.com>,
"Git Mailing List" <git@vger.kernel.org>,
"Junio C Hamano" <gitster@pobox.com>,
"Rohit Ashiwal" <rohit.ashiwal265@gmail.com>,
"Matthieu Moy" <git@matthieu-moy.fr>
Subject: Re: Do test-path_is_{file,dir,exists} make sense anymore with -x?
Date: Mon, 4 Mar 2019 15:36:33 +0100 [thread overview]
Message-ID: <20190304143633.GC28939@szeder.dev> (raw)
In-Reply-To: <20190226210101.GA27914@sigill.intra.peff.net>
On Tue, Feb 26, 2019 at 04:01:01PM -0500, Jeff King wrote:
> > + { set +x ; } 2>/dev/null 4>/dev/null
>
> Ah, this is the magic. Doing:
>
> set +x 2>/dev/null
>
> will still show it, but doing the redirection in a wrapping block means
> that it is applied before the command inside the block is run. Clever.
Yeah, clever, but unfortunately (and to me suprisingly) unportable:
$ ksh
$ set -x
$ echo foo
+ echo foo
foo
$ set +x
$
It doesn't show 'set +x', how convenient! :)
However:
$ set -x
$ echo foo 2>/dev/null
+ echo foo
+ 2> /dev/null
foo
$ { set +x; } 2>/dev/null
+ 2> /dev/null
$
Apparently ksh, ksh93 and mksh show not only the executed commands
but any redirections as well. It's already visible when running our
tests with ksh and '-x':
$ ksh ./t9999-test.sh -x
Initialized empty Git repository in /home/szeder/src/git/t/trash directory.t9999-test/.git/
expecting success:
true
+ true
+ 2> /dev/null ok 1 - first
# passed all 1 test(s)
1..1
NetBSD's sh:
# set -x
# echo foo
+ echo foo
foo
# echo foo 2>/dev/null
+ echo foo 2>/dev/null
foo
# { set +x; } 2>/dev/null
+ using redirections: 2>/dev/null do
next prev parent reply other threads:[~2019-03-04 14:36 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-02-26 13:42 [PATCH 0/1] [GSoC][PATCH] tests: replace test -(d|f) with test_path_is_(dir|file) Rohit Ashiwal via GitGitGadget
2019-02-26 13:42 ` [PATCH 1/1] tests: replace `test -(d|f)` " Rohit Ashiwal via GitGitGadget
2019-02-26 14:04 ` Duy Nguyen
2019-02-26 16:10 ` Do test-path_is_{file,dir,exists} make sense anymore with -x? Ævar Arnfjörð Bjarmason
2019-02-26 17:04 ` SZEDER Gábor
2019-02-26 17:43 ` Jeff King
2019-02-26 19:39 ` SZEDER Gábor
2019-02-26 21:01 ` Jeff King
2019-03-03 16:04 ` SZEDER Gábor
2019-03-05 4:55 ` Jeff King
2019-03-04 14:36 ` SZEDER Gábor [this message]
2019-03-05 4:58 ` Jeff King
2019-02-26 17:48 ` Matthieu Moy
2019-02-26 18:24 ` Jeff King
2019-02-26 17:35 ` Jeff King
2019-02-26 19:58 ` Johannes Schindelin
2019-02-26 21:02 ` Jeff King
2019-02-27 10:01 ` Duy Nguyen
2019-03-01 2:52 ` Junio C Hamano
2019-02-26 16:01 ` [PATCH 1/1] tests: replace `test -(d|f)` with test_path_is_(dir|file) Johannes Schindelin
2019-02-26 16:30 ` Martin Ågren
2019-02-26 18:29 ` Rohit Ashiwal
2019-02-26 19:52 ` Johannes Schindelin
2019-02-26 20:01 ` Rohit Ashiwal
2019-02-27 5:49 ` Martin Ågren
2019-02-26 14:26 ` [PATCH v2 0/1] [GSoC][PATCH] t3600: use test_path_is_dir and test_path_is_file Rohit Ashiwal via GitGitGadget
2019-02-26 14:26 ` [PATCH v2 1/1] " Rohit Ashiwal via GitGitGadget
2019-02-26 16:37 ` SZEDER Gábor
2019-02-26 18:40 ` Rohit Ashiwal
2019-02-26 20:02 ` Johannes Schindelin
2019-02-26 20:05 ` Rohit Ashiwal
2019-02-26 22:48 ` [PATCH v3 0/1] [GSoC][PATCH] t3600: use test_path_is_* helper functions Rohit Ashiwal via GitGitGadget
2019-02-26 22:48 ` [PATCH v3 1/1] t3600: use test_path_is_* functions Rohit Ashiwal via GitGitGadget
2019-02-27 10:12 ` Duy Nguyen
2019-02-28 10:26 ` [PATCH v4 0/1] [GSoC][PATCH] t3600: use test_path_is_* helper functions Rohit Ashiwal via GitGitGadget
2019-02-28 10:26 ` [PATCH v4 1/1] t3600: use test_path_is_* functions Rohit Ashiwal via GitGitGadget
2019-02-28 19:02 ` [GSoC] acknowledging mistakes Rohit Ashiwal
2019-03-01 2:51 ` Junio C Hamano
2019-03-01 13:13 ` Feeling confused a little bit Rohit Ashiwal
2019-03-02 4:24 ` Rafael Ascensão
2019-03-02 14:46 ` Thomas Gummerer
2019-03-02 16:21 ` [GSoC] Thanking Rohit Ashiwal
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