selftests: Add version file to kselftest installation dir

As titled, adding version file to kselftest installation dir, so the user
of the tarball can know which kernel version the tarball belongs to.

Link: https://lore.kernel.org/r/20250610221248.819519-1-1997cui@gmail.com
Signed-off-by: Tianyi Cui <1997cui@gmail.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>

diff --git a/tools/testing/selftests/Makefile b/tools/testing/selftests/Makefile
index 339b31e6a6b592217eca1c03068f21728ea024b4..9dae84a74e7ff1894236f426682faae100a23070 100644 (file)
--- a/tools/testing/selftests/Makefile
+++ b/tools/testing/selftests/Makefile
@@ -293,6 +293,13 @@ ifdef INSTALL_PATH
                $(MAKE) -s --no-print-directory OUTPUT=$$BUILD_TARGET COLLECTION=$$TARGET \
                        -C $$TARGET emit_tests >> $(TEST_LIST); \
        done;
+       @VERSION=$$(git describe HEAD 2>/dev/null); \
+       if [ -n "$$VERSION" ]; then \
+               echo "$$VERSION" > $(INSTALL_PATH)/VERSION; \
+               printf "Version saved to $(INSTALL_PATH)/VERSION\n"; \
+       else \
+               printf "Unable to get version from git describe\n"; \
+       fi
 else
        $(error Error: set INSTALL_PATH to use install)
 endif