selftests: kselftest_deps: fix l5_test() empty variable

exlud · shuahkh · commit 17909476d631 · 2024-05-08T16:46:41.000-06:00
In the function l5_test(), variable $tests is empty when there is no .mk
file in the subsystem to be tested. It causes the following grep operation
get stuck.

This fix check the variable $tests, return when it is empty.

Signed-off-by: Lu Dai &lt;dai.lu@exordes.com&gt;
Signed-off-by: Shuah Khan &lt;skhan@linuxfoundation.org&gt;
diff --git a/tools/testing/selftests/kselftest_deps.sh b/tools/testing/selftests/kselftest_deps.sh
@@ -244,6 +244,7 @@ l4_test()
 l5_test()
 {
 	tests=$(find $(dirname "$test") -type f -name "*.mk")
+	[[ -z "${tests// }" ]] && return
 	test_libs=$(grep "^IOURING_EXTRA_LIBS +\?=" $tests | \
 			cut -d "=" -f 2)
 

Original file line number	Diff line number	Diff line change
`@@ -244,6 +244,7 @@ l4_test()`
`244`	`244`	`l5_test()`
`245`	`245`	`{`
`246`	`246`	`tests=$(find $(dirname "$test") -type f -name "*.mk")`
	`247`	`+ [[ -z "${tests// }" ]] && return`
`247`	`248`	`test_libs=$(grep "^IOURING_EXTRA_LIBS +\?=" $tests \| \`
`248`	`249`	`cut -d "=" -f 2)`
`249`	`250`