From: Shourya Shukla <shouryashukla.oo@gmail.com>
To: Junio C Hamano <gitster@pobox.com>
Cc: kaartic.sivaraam@gmail.com, christian.couder@gmail.com,
git@vger.kernel.org, Johannes.Schindelin@gmx.de,
liu.denton@gmail.com, me@ttaylorr.com
Subject: Re: [PATCH v2 1/4] t7401: modernize style
Date: Fri, 14 Aug 2020 20:11:26 +0530 [thread overview]
Message-ID: <20200814144126.GA137865@konoha> (raw)
In-Reply-To: <xmqqd03u4hpl.fsf@gitster.c.googlers.com>
On 13/08 09:46, Junio C Hamano wrote:
> Kaartic Sivaraam <kaartic.sivaraam@gmail.com> writes:
>
> >> @@ -16,12 +16,13 @@ add_file () {
> >> owd=$(pwd)
> >> cd "$sm"
> >> for name; do
> >> - echo "$name" > "$name" &&
> >> + echo "$name" >"$name" &&
> >> git add "$name" &&
> >> test_tick &&
> >> git commit -m "Add $name"
> >> done >/dev/null
> >> - git rev-parse --verify HEAD | cut -c1-7
> >> + git rev-parse --verify HEAD >out &&
> >> + cut -c1-7 out
> >
> > In any case, I believe we can avoid the 'cut' altogether in both places
> > by doing something like this instead:
> >
> > git rev-parse --short=7 HEAD
>
> Ah, I missed the fact that this was a helper function and most of
> the error status is discarded anyway. For example, we still run the
> rev-parse even after the for loop fails.
>
> If the focus of this test script were to ensure that rev-parse works
> correctly, being careful to catch its exit status might have had a
> good value, but for that, all the other operations that happen in
> this helper function (including the "what happens when the loop body
> fails for $name that is not at the end of the argument list?") must
> also be checked for their exit status in the first place.
>
> Since that is not done, and since testing rev-parse should not have
> to be part of the job for submodule test, the net effect of the
> above change has quite dubious value---it clobbered a file 'out'
> that may be used by the caller.
>
> Doing "cd" without introducing a subshell is a bit harder to fix, as
> test_tick relies on the global counter in the topmost process. It
> can be done, but I do not think it is worth doing here. Most of the
> users of this helper function call it in var=$(add_file ...)
> subshell anyway (so test_tick is incrementing the timestamp
> independently for each caller and discarding the resulting
> timestamp). As a NEEDSWORK comment added in the series says, this
> script may need a bit more work.
>
> I agree with you that the split of "rev-parse | cut -c1-7" into two
> statements and clobbering 'out' is a bad change---that part should
> be reverted. The style change on 'echo "$name" >"$name"' line is
> OK, though.
>
> Thanks.
Understood. I will revert the change. Though, what Kaartic suggested, to
do a '--short=7', that will be okay to keep right? Something like:
git rev-parse --short=7 HEAD
This way we will not need a 'cut'. This change goes as a separate commit
obviously.
next prev parent reply other threads:[~2020-08-14 14:41 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-08-05 17:49 [GSoC][RESEND][PATCH 0/4] t7401: modernize, cleanup and warn Shourya Shukla
2020-08-05 17:49 ` [PATCH 1/4] t7401: modernize style Shourya Shukla
2020-08-05 19:37 ` Denton Liu
2020-08-05 20:49 ` Taylor Blau
2020-08-06 8:45 ` Shourya Shukla
2020-08-05 17:49 ` [PATCH 2/4] t7401: change test_i18ncmp syntax for clarity Shourya Shukla
2020-08-05 20:58 ` Taylor Blau
2020-08-05 21:23 ` Junio C Hamano
2020-08-05 17:49 ` [PATCH 3/4] t7401: ensure uniformity in the '--for-status' test Shourya Shukla
2020-08-05 21:01 ` Taylor Blau
2020-08-05 22:25 ` Junio C Hamano
2020-08-05 22:26 ` Taylor Blau
2020-08-05 21:30 ` Junio C Hamano
2020-08-06 8:50 ` Shourya Shukla
2020-08-06 17:18 ` Junio C Hamano
2020-08-05 17:49 ` [PATCH 4/4] t7401: add a WARNING and a NEEDSWORK Shourya Shukla
2020-08-05 21:04 ` Taylor Blau
2020-08-05 21:36 ` Junio C Hamano
2020-08-06 11:27 ` Shourya Shukla
2020-08-06 21:11 ` Junio C Hamano
2020-08-07 14:55 ` Christian Couder
2020-08-12 19:27 ` [GSoC][PATCH v2 0/4] t7401: modernize, cleanup and more Shourya Shukla
2020-08-12 19:27 ` [PATCH v2 1/4] t7401: modernize style Shourya Shukla
2020-08-13 8:06 ` Kaartic Sivaraam
2020-08-13 16:46 ` Junio C Hamano
2020-08-14 14:41 ` Shourya Shukla [this message]
2020-08-14 17:06 ` Junio C Hamano
2020-08-12 19:27 ` [PATCH v2 2/4] t7401: change test_i18ncmp syntax for clarity Shourya Shukla
2020-08-12 20:57 ` Junio C Hamano
2020-08-12 21:02 ` Junio C Hamano
2020-08-14 14:57 ` Shourya Shukla
2020-08-12 19:27 ` [PATCH v2 3/4] t7401: change indentation for enhanced readability Shourya Shukla
2020-08-12 19:27 ` [PATCH v2 4/4] t7401: add a NEEDSWORK Shourya Shukla
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