Hi Junio,
On Wed, 25 Mar 2020, Junio C Hamano wrote:
> "Johannes Schindelin via GitGitGadget" <gitgitgadget@xxxxxxxxx>
> 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 $trace_level_ but that is minor.
Good point, I had missed that. Will be fixed in the next iteration.
Ciao,
Dscho
>
> Thanks.
>
> > Signed-off-by: Johannes Schindelin <johannes.schindelin@xxxxxx>
> > ---
> > t/t0000-basic.sh | 13 +++++++++++++
> > t/test-lib.sh | 6 ++++--
> > 2 files changed, 17 insertions(+), 2 deletions(-)
> >
> > diff --git a/t/t0000-basic.sh b/t/t0000-basic.sh
> > index 3e440c078d5..b8597216200 100755
> > --- a/t/t0000-basic.sh
> > +++ b/t/t0000-basic.sh
> > @@ -833,6 +833,19 @@ then
> > exit 1
> > fi
> >
> > +test_expect_success 'lazy prereqs do not turn off tracing' "
> > + run_sub_test_lib_test lazy-prereq-and-tracing \
> > + 'lazy prereqs and -x' -v -x <<-\\EOF &&
> > + test_lazy_prereq LAZY true
> > +
> > + test_expect_success lazy 'test_have_prereq LAZY && echo trace'
> > +
> > + test_done
> > + EOF
> > +
> > + grep 'echo trace' lazy-prereq-and-tracing/err
> > +"
> > +
> > test_expect_success 'tests clean up even on failures' "
> > run_sub_test_lib_test_err \
> > failing-cleanup 'Failing tests with cleanup commands' <<-\\EOF &&
> > diff --git a/t/test-lib.sh b/t/test-lib.sh
> > index 0ea1e5a05ed..dbf25348106 100644
> > --- a/t/test-lib.sh
> > +++ b/t/test-lib.sh
> > @@ -882,6 +882,7 @@ maybe_setup_valgrind () {
> > fi
> > }
> >
> > +_trace_level=0
> > want_trace () {
> > test "$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
>
