[PATCH] rebase: fix regression in rebase.useBuiltin=false test mode

["Ævar Arnfjörð Bjarmason" <avarab@gmail.com>]

Fix a recently introduced regression in c762aada1a ("rebase -x: sanity
check command", 2019-01-29) triggered when running the tests with
GIT_TEST_REBASE_USE_BUILTIN=false. See 62c23938fa ("tests: add a
special setup where rebase.useBuiltin is off", 2018-11-14) for how
that test mode works.

As discussed on-list[1] it's not worth it to implement the sanity
check in the legacy rebase code, we plan to remove it after the 2.21
release. So let's do the bare minimum to make the tests pass under the
GIT_TEST_REBASE_USE_BUILTIN=false special setup.

1. https://public-inbox.org/git/xmqqva1nbeno.fsf@gitster-ct.c.googlers.com/

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
---

On Wed, Feb 13 2019, Junio C Hamano wrote:
  
> [...]
> It would however be long enough to declare victory _immediately
> after_ the upcoming release and start the next cycle without the
> escape hatch.  At that point we'd be committed to maintain only the
> built-in version.
>
> The more important every-day features should still be covered by
> tests, if the scripted ones are to be kept as escape hatch.  So to
> me #1 looks like the only sensible choice at this point, if you want
> to see a test cycle with USE_BUILTIN=false to fully pass (i.e. by
> skipping the ones that are known not to pass).

Let's do this for 2.21 then and I'll re-submit the legacy removal
patch after we start 2.22.

 t/t3404-rebase-interactive.sh | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/t/t3404-rebase-interactive.sh b/t/t3404-rebase-interactive.sh
index 52fa41c707..b60b11f9f2 100755
--- a/t/t3404-rebase-interactive.sh
+++ b/t/t3404-rebase-interactive.sh
@@ -149,10 +149,12 @@ test_expect_success 'rebase -i with the exec command checks tree cleanness' '
 
 test_expect_success 'rebase -x with empty command fails' '
 	test_when_finished "git rebase --abort ||:" &&
-	test_must_fail git rebase -x "" @ 2>actual &&
+	test_must_fail env GIT_TEST_REBASE_USE_BUILTIN=true \
+		git rebase -x "" @ 2>actual &&
 	test_write_lines "error: empty exec command" >expected &&
 	test_i18ncmp expected actual &&
-	test_must_fail git rebase -x " " @ 2>actual &&
+	test_must_fail env GIT_TEST_REBASE_USE_BUILTIN=true \
+		git rebase -x " " @ 2>actual &&
 	test_i18ncmp expected actual
 '
 
@@ -160,7 +162,8 @@ LF='
 '
 test_expect_success 'rebase -x with newline in command fails' '
 	test_when_finished "git rebase --abort ||:" &&
-	test_must_fail git rebase -x "a${LF}b" @ 2>actual &&
+	test_must_fail env GIT_TEST_REBASE_USE_BUILTIN=true \
+		git rebase -x "a${LF}b" @ 2>actual &&
 	test_write_lines "error: exec commands cannot contain newlines" \
 			 >expected &&
 	test_i18ncmp expected actual
-- 
2.20.1.611.gfbb209baf1