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From: Johannes Schindelin <Johannes.Schindelin@gmx.de>
To: Junio C Hamano <gitster@pobox.com>
Cc: Johannes Schindelin via GitGitGadget <gitgitgadget@gmail.com>,
	git@vger.kernel.org, Jeff King <peff@peff.net>
Subject: Re: [PATCH v2 4/5] tests: do not let lazy prereqs inside `test_expect_*` turn off tracing
Date: Thu, 26 Mar 2020 14:45:53 +0100 (CET)
Message-ID: <nycvar.QRO.7.76.6.2003261443550.46@tvgsbejvaqbjf.bet> (raw)
In-Reply-To: <xmqqwo78wdq9.fsf@gitster.c.googlers.com>

[-- Attachment #1: Type: text/plain, Size: 3491 bytes --]

Hi Junio,

On Wed, 25 Mar 2020, Junio C Hamano wrote:

> "Johannes Schindelin via GitGitGadget" <gitgitgadget@gmail.com>
> writes:
>
> > The `test_expect_*` functions use `test_eval_` and so does
> > `test_run_lazy_prereq_`. If tracing is enabled via the `-x` option,
> > `test_eval_` turns on tracing while evaluating the code block, and turns
> > it off directly after it.
> >
> > This is unwanted for nested invocations.
>
> Nice finding.

Heh. I found this ages ago, and mistook it for "all prereqs turn off
tracing" when I reported it, but Gábor pointed out that that is incorrect.

That was a long time ago, maybe even a year, and I finally used this patch
series as an excuse to finally dig deep on this.

> > As we will introduce just such a scenario with the GPG, GPGSM and
> > RFC1991 prereqs, let's fix that by introducing a variable that keeps
> > track of the current trace level: nested `test_eval_` calls will
> > increment and then decrement the level, and only when it reaches 0, the
> > tracing will _actually_ be turned off.
>
> Doesn't this explanation urge us to reorder these patches?  It
> sounds to me that it argues to have this step before 3/5.

Yes, that's where I had meant to put this patch. Sorry for the confusion.

> Other than that, both the explanation and the code look correctly
> done.  It looks to me that the surrounding code favors trailing "_"
> instead of leading one for private names, so we might want to rename
> the variable to $trace_level_ but that is minor.

Good point, I had missed that. Will be fixed in the next iteration.

Ciao,
Dscho

>
> Thanks.
>
> > Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
> > ---
> >  t/t0000-basic.sh | 13 +++++++++++++
> >  t/test-lib.sh    |  6 ++++--
> >  2 files changed, 17 insertions(+), 2 deletions(-)
> >
> > diff --git a/t/t0000-basic.sh b/t/t0000-basic.sh
> > index 3e440c078d5..b8597216200 100755
> > --- a/t/t0000-basic.sh
> > +++ b/t/t0000-basic.sh
> > @@ -833,6 +833,19 @@ then
> >  	exit 1
> >  fi
> >
> > +test_expect_success 'lazy prereqs do not turn off tracing' "
> > +	run_sub_test_lib_test lazy-prereq-and-tracing \
> > +		'lazy prereqs and -x' -v -x <<-\\EOF &&
> > +	test_lazy_prereq LAZY true
> > +
> > +	test_expect_success lazy 'test_have_prereq LAZY && echo trace'
> > +
> > +	test_done
> > +	EOF
> > +
> > +	grep 'echo trace' lazy-prereq-and-tracing/err
> > +"
> > +
> >  test_expect_success 'tests clean up even on failures' "
> >  	run_sub_test_lib_test_err \
> >  		failing-cleanup 'Failing tests with cleanup commands' <<-\\EOF &&
> > diff --git a/t/test-lib.sh b/t/test-lib.sh
> > index 0ea1e5a05ed..dbf25348106 100644
> > --- a/t/test-lib.sh
> > +++ b/t/test-lib.sh
> > @@ -882,6 +882,7 @@ maybe_setup_valgrind () {
> >  	fi
> >  }
> >
> > +_trace_level=0
> >  want_trace () {
> >  	test "$trace" = t && {
> >  		test "$verbose" = t || test "$verbose_log" = t
> > @@ -895,7 +896,7 @@ want_trace () {
> >  test_eval_inner_ () {
> >  	# Do not add anything extra (including LF) after '$*'
> >  	eval "
> > -		want_trace && set -x
> > +		want_trace && _trace_level=$(($_trace_level+1)) && set -x
> >  		$*"
> >  }
> >
> > @@ -926,7 +927,8 @@ test_eval_ () {
> >  		test_eval_ret_=$?
> >  		if want_trace
> >  		then
> > -			set +x
> > +			test 1 = $_trace_level && set +x
> > +			_trace_level=$(($_trace_level-1))
> >  		fi
> >  	} 2>/dev/null 4>&2
>

  reply index

Thread overview: 55+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-03-23 13:09 [PATCH 0/2] Enable GPG in the Windows part of the CI/PR builds Johannes Schindelin via GitGitGadget
2020-03-23 13:09 ` [PATCH 1/2] tests(gpg): allow the gpg-agent to start on Windows Johannes Schindelin via GitGitGadget
2020-03-23 17:46   ` Junio C Hamano
2020-03-24 19:55     ` Johannes Schindelin
2020-03-24 20:59       ` Junio C Hamano
2020-03-24 22:26         ` Johannes Schindelin
2020-03-24 23:40           ` Junio C Hamano
2020-03-23 13:09 ` [PATCH 2/2] tests(gpg): increase verbosity to allow debugging Johannes Schindelin via GitGitGadget
2020-03-23 17:32   ` Jeff King
2020-03-23 18:04     ` Jeff King
2020-03-23 19:21       ` Junio C Hamano
2020-03-23 20:15         ` Jeff King
2020-03-23 21:28           ` Junio C Hamano
2020-03-23 21:31             ` Jeff King
2020-03-24 21:41               ` Johannes Schindelin
2020-03-24 22:05                 ` Jeff King
2020-03-24 22:25                   ` Johannes Schindelin
2020-03-24 22:33                     ` Jeff King
2020-03-25  5:41 ` [PATCH v2 0/5] Enable GPG in the Windows part of the CI/PR builds Johannes Schindelin via GitGitGadget
2020-03-25  5:41   ` [PATCH v2 1/5] tests(gpg): allow the gpg-agent to start on Windows Johannes Schindelin via GitGitGadget
2020-03-25  5:41   ` [PATCH v2 2/5] t/lib-gpg.sh: stop pretending to be a stand-alone script Johannes Schindelin via GitGitGadget
2020-03-26  8:21     ` Jeff King
2020-03-26 13:48       ` Johannes Schindelin
2020-03-26 19:31       ` Junio C Hamano
2020-03-25  5:41   ` [PATCH v2 3/5] tests: turn GPG, GPGSM and RFC1991 into lazy prereqs Johannes Schindelin via GitGitGadget
2020-03-25 17:25     ` Junio C Hamano
2020-03-26  8:35     ` Jeff King
2020-03-26 14:27       ` Johannes Schindelin
2020-03-27  9:10         ` Jeff King
2020-03-27 17:44           ` Junio C Hamano
2020-03-27 20:24             ` Eric Sunshine
2020-03-27 21:37               ` Junio C Hamano
2020-03-28 10:58                 ` Jeff King
2020-03-28 10:54             ` Jeff King
2020-03-28 23:49               ` [PATCH v2] t/README: suggest how to leave test early with failure Junio C Hamano
2020-03-29  7:23                 ` Eric Sunshine
2020-03-29 14:33                 ` Jeff King
2020-03-30 18:39           ` [PATCH v2 3/5] tests: turn GPG, GPGSM and RFC1991 into lazy prereqs Johannes Schindelin
2020-03-31  9:34             ` Jeff King
2020-03-25  5:41   ` [PATCH v2 4/5] tests: do not let lazy prereqs inside `test_expect_*` turn off tracing Johannes Schindelin via GitGitGadget
2020-03-25 17:23     ` Junio C Hamano
2020-03-26 13:45       ` Johannes Schindelin [this message]
2020-03-26  8:49     ` Jeff King
2020-03-26 14:34       ` Johannes Schindelin
2020-03-25  5:41   ` [PATCH v2 5/5] tests: increase the verbosity of the GPG-related prereqs Johannes Schindelin via GitGitGadget
2020-03-26  8:50     ` Jeff King
2020-03-26 14:36       ` Johannes Schindelin
2020-03-26 15:35   ` [PATCH v3 0/5] Enable GPG in the Windows part of the CI/PR builds Johannes Schindelin via GitGitGadget
2020-03-26 15:35     ` [PATCH v3 1/5] tests(gpg): allow the gpg-agent to start on Windows Johannes Schindelin via GitGitGadget
2020-03-26 15:35     ` [PATCH v3 2/5] t/lib-gpg.sh: stop pretending to be a stand-alone script Johannes Schindelin via GitGitGadget
2020-03-26 15:35     ` [PATCH v3 3/5] tests: do not let lazy prereqs inside `test_expect_*` turn off tracing Johannes Schindelin via GitGitGadget
2020-03-26 15:35     ` [PATCH v3 4/5] tests: turn GPG, GPGSM and RFC1991 into lazy prereqs Johannes Schindelin via GitGitGadget
2020-03-26 15:35     ` [PATCH v3 5/5] tests: increase the verbosity of the GPG-related prereqs Johannes Schindelin via GitGitGadget
2020-03-27  9:12     ` [PATCH v3 0/5] Enable GPG in the Windows part of the CI/PR builds Jeff King
2020-03-27 17:45       ` Junio C Hamano

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