Re: [PATCH 1/4] tests: make RUNTIME_PREFIX compatible with --valgrind

[Junio C Hamano <gitster@pobox.com>]

Ævar Arnfjörð Bjarmason  <avarab@gmail.com> writes:

> Subject: Re: [PATCH 1/4] tests: make RUNTIME_PREFIX compatible with --valgrind

The patch text looks more like 

	tests: --valgrind does not work with RUNTIME_PREFIX

to me.  Is it true that a test that only works with RUNTIME_PREFIX
does not work under --valgrind at all?  I am wondering if we can do
this without introducing a new prerequisite, and if it makes sense
to do so if it can be done.  The output from

    $ git grep 'test_expect_success .*RUNTIME_PREFIX' t/

tells me that there are two test pieces that must be run under
RUNTIME_PREFIX, and this patch touches both of them.

I guess it is not RUNTIME_PREFIX build itself per-se, but it is
the way we test RUNTIME_PREFIX is incompatible with how we run our
tests under --valgrind, so neither the title on the Subject: header
of this message or "looks more like" above is a good one.  It is
more like

	tests: using custom GIT_EXEC_PATH breaks --valgrind tests

I think.

And after having looked at the patch text and thought about the
issues enough to come up with the above updated title, I can say
that the change looks quite reasonable, both the body of the
proposed log message and the solution.  Nicely done.

It would have been even nicer if I didn't have to think about the
issues myself, though ;-)

Thanks.

> Fix a regression in b7d11a0f5d2 (tests: exercise the RUNTIME_PREFIX
> feature, 2021-07-24) where tests that want to set up and test a "git"
> wrapper in $PATH conflicted with the t/bin/valgrind wrapper(s) doing
> the same.
>
> Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
> ---
>  t/t0060-path-utils.sh | 4 ++--
>  t/test-lib.sh         | 1 +
>  2 files changed, 3 insertions(+), 2 deletions(-)
>
> diff --git a/t/t0060-path-utils.sh b/t/t0060-path-utils.sh
> index 2fe6ae6a4e5..aa35350b6f3 100755
> --- a/t/t0060-path-utils.sh
> +++ b/t/t0060-path-utils.sh
> @@ -542,7 +542,7 @@ test_lazy_prereq CAN_EXEC_IN_PWD '
>  	./git rev-parse
>  '
>  
> -test_expect_success RUNTIME_PREFIX,CAN_EXEC_IN_PWD 'RUNTIME_PREFIX works' '
> +test_expect_success !VALGRIND,RUNTIME_PREFIX,CAN_EXEC_IN_PWD 'RUNTIME_PREFIX works' '
>  	mkdir -p pretend/bin pretend/libexec/git-core &&
>  	echo "echo HERE" | write_script pretend/libexec/git-core/git-here &&
>  	cp "$GIT_EXEC_PATH"/git$X pretend/bin/ &&
> @@ -550,7 +550,7 @@ test_expect_success RUNTIME_PREFIX,CAN_EXEC_IN_PWD 'RUNTIME_PREFIX works' '
>  	echo HERE >expect &&
>  	test_cmp expect actual'
>  
> -test_expect_success RUNTIME_PREFIX,CAN_EXEC_IN_PWD '%(prefix)/ works' '
> +test_expect_success !VALGRIND,RUNTIME_PREFIX,CAN_EXEC_IN_PWD '%(prefix)/ works' '
>  	mkdir -p pretend/bin &&
>  	cp "$GIT_EXEC_PATH"/git$X pretend/bin/ &&
>  	git config yes.path "%(prefix)/yes" &&
> diff --git a/t/test-lib.sh b/t/test-lib.sh
> index 531cef097db..7f3d323e937 100644
> --- a/t/test-lib.sh
> +++ b/t/test-lib.sh
> @@ -1666,6 +1666,7 @@ test -n "$USE_LIBPCRE2" && test_set_prereq PCRE
>  test -n "$USE_LIBPCRE2" && test_set_prereq LIBPCRE2
>  test -z "$NO_GETTEXT" && test_set_prereq GETTEXT
>  test -n "$SANITIZE_LEAK" && test_set_prereq SANITIZE_LEAK
> +test -n "$GIT_VALGRIND_ENABLED" && test_set_prereq VALGRIND
>  
>  if test -z "$GIT_TEST_CHECK_CACHE_TREE"
>  then