[PATCH 4/6] t1419: mark test suite as files-backend specific

[Patrick Steinhardt <ps@pks.im>]

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With 59c35fac54 (refs/packed-backend.c: implement jump lists to avoid
excluded pattern(s), 2023-07-10) we have implemented logic to handle
excluded refs more efficiently in the "packed" ref backend. This logic
allows us to skip emitting refs completely which we know to not be of
any interest to the caller, which can avoid quite some allocaitons and
object lookups.

This was wired up via a new `exclude_patterns` parameter passed to the
backend's ref iterator. The backend only needs to handle them on a best
effort basis though, and in fact we only handle it for the "packed-refs"
file, but not for loose references. Consequentially, all callers must
still filter emitted refs with those exclude patterns.

The result is that handling exclude patterns is completely optional in
the ref backend, and any future backends may or may not implement it.
Let's thus mark the test for t1419 to depend on the REFFILES prereq.

Signed-off-by: Patrick Steinhardt <ps@pks.im>
---
 t/t1419-exclude-refs.sh | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/t/t1419-exclude-refs.sh b/t/t1419-exclude-refs.sh
index 5d8c86b657..1359574419 100755
--- a/t/t1419-exclude-refs.sh
+++ b/t/t1419-exclude-refs.sh
@@ -8,6 +8,12 @@ export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
 TEST_PASSES_SANITIZE_LEAK=true
 . ./test-lib.sh
 
+if test_have_prereq !REFFILES
+then
+	skip_all='skipping `git for-each-ref --exclude` tests; need files backend'
+	test_done
+fi
+
 for_each_ref__exclude () {
 	GIT_TRACE2_PERF=1 test-tool ref-store main \
 		for-each-ref--exclude "$@" >actual.raw
-- 
2.43.GIT


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