[PATCH 10/11] perf: implement a test-selection feature

[Thomas Rast <trast@student.ethz.ch>]

When bisecting for a performance regression, there is usually no point
in running all tests in the pNNNN-foo.sh file, since you are
interested only in the result of a single test.

Make GIT_PERF_TEST_ONLY=pNNNN.I select only the test NNNN.I for
running.  All other test_perf blocks are skipped.  test_expect_success
blocks are deliberately not affected; presumably they consist of setup
code.

Signed-off-by: Thomas Rast <trast@student.ethz.ch>
---
 t/perf/perf-lib.sh |    6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/t/perf/perf-lib.sh b/t/perf/perf-lib.sh
index bfc2926..ddb3272 100644
--- a/t/perf/perf-lib.sh
+++ b/t/perf/perf-lib.sh
@@ -153,7 +153,11 @@ test_perf () {
 	test "$#" = 2 ||
 	error "bug in the test script: not 2 or 3 parameters to test-expect-success"
 	export test_prereq
-	if ! test_skip "$@"
+	skipping=
+	test_skip "$@" && skipping=t
+	test -z "$GIT_PERF_TEST_ONLY" ||
+	test "$GIT_PERF_TEST_ONLY" = $this_test.$test_count || skipping=t
+	if test -z "$skipping"
 	then
 		base=$(basename "$0" .sh)
 		echo "$test_count" >>"$perf_results_dir"/$base.subtests
-- 
1.7.10.rc0.230.g16d90