From: Junio C Hamano <gitster@pobox.com>
To: "René Scharfe" <l.s.r@web.de>
Cc: "Git List" <git@vger.kernel.org>,
"Matheus Tavares" <matheus.bernardino@usp.br>,
"SZEDER Gábor" <szeder.dev@gmail.com>,
"Ævar Arnfjörð Bjarmason" <avarab@gmail.com>
Subject: Re: [PATCH v3] parallel-checkout: avoid dash local bug in tests
Date: Sun, 06 Jun 2021 10:41:41 +0900 [thread overview]
Message-ID: <xmqq5yyr22i2.fsf@gitster.g> (raw)
In-Reply-To: <3b71b62d-b299-aac8-f796-ee7a5d7f87b0@web.de> ("René Scharfe"'s message of "Sun, 6 Jun 2021 03:01:57 +0200")
René Scharfe <l.s.r@web.de> writes:
> Dash bug https://bugs.launchpad.net/ubuntu/+source/dash/+bug/139097
> lets the shell erroneously perform field splitting on the expansion of a
> command substitution during declaration of a local variable. It causes
> the parallel-checkout tests to fail e.g. when running them with
> /bin/dash on MacOS 11.4, where they error out like this:
>
> ./t2080-parallel-checkout-basics.sh: 33: local: 0: bad variable name
>
> That's because the output of wc -l contains leading spaces and the
> returned number of lines is treated as another variable to declare, i.e.
> as in "local workers= 0".
>
> Work around it by enclosing the command substitution in quotes.
>
> Helped-by: Matheus Tavares Bernardino <matheus.bernardino@usp.br>
> Helped-by: SZEDER Gábor <szeder.dev@gmail.com>
> Helped-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
> Signed-off-by: René Scharfe <l.s.r@web.de>
> ---
> Changes since v2:
> - Use minimal fix.
> - New commit message.
Thanks. As I said, I do not necessarily think this is conceptually
"minimal", but we use workers only once and without surrounding dq
so it is easy to see that this also is correct.
Will queue.
>
> t/lib-parallel-checkout.sh | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/t/lib-parallel-checkout.sh b/t/lib-parallel-checkout.sh
> index 21f5759732..83b279a846 100644
> --- a/t/lib-parallel-checkout.sh
> +++ b/t/lib-parallel-checkout.sh
> @@ -27,7 +27,7 @@ test_checkout_workers () {
> rm -f "$trace_file" &&
> GIT_TRACE2="$(pwd)/$trace_file" "$@" 2>&8 &&
>
> - local workers=$(grep "child_start\[..*\] git checkout--worker" "$trace_file" | wc -l) &&
> + local workers="$(grep "child_start\[..*\] git checkout--worker" "$trace_file" | wc -l)" &&
> test $workers -eq $expected_workers &&
> rm "$trace_file"
> } 8>&2 2>&4
> --
> 2.31.1
prev parent reply other threads:[~2021-06-06 1:43 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-05 12:27 [PATCH] parallel-checkout: use grep -c to count workers in tests René Scharfe
2021-06-05 14:31 ` Matheus Tavares Bernardino
2021-06-05 15:20 ` René Scharfe
2021-06-05 15:30 ` René Scharfe
2021-06-05 18:11 ` [PATCH v2] parallel-checkout: avoid dash local bug " René Scharfe
2021-06-05 19:09 ` SZEDER Gábor
2021-06-06 1:01 ` René Scharfe
2021-06-05 19:56 ` Ævar Arnfjörð Bjarmason
2021-06-05 22:17 ` Matheus Tavares Bernardino
2021-06-05 22:21 ` Matheus Tavares Bernardino
2021-06-06 1:01 ` René Scharfe
2021-06-06 1:28 ` Junio C Hamano
2021-06-06 1:01 ` [PATCH v3] " René Scharfe
2021-06-06 1:41 ` Junio C Hamano [this message]
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