tests: fix test-checkstyle-diff if no .py changed

Type: fix
Signed-off-by: Klement Sekera <klement.sekera@gmail.com>
Change-Id: I6d23ff14380b0154f617b3ab7cd1acd5aa45106a

diff --git a/test/Makefile b/test/Makefile
index bf5f911..92face0 100644 (file)
--- a/test/Makefile
+++ b/test/Makefile
@@ -271,8 +271,8 @@ checkstyle-diff: $(PIP_INSTALL_DONE)
        @bash -c "source $(VENV_PATH)/bin/activate &&\
                  python3 -m pip install pycodestyle"
        @bash -c "source $(VENV_PATH)/bin/activate &&\
-               cd $(WS_ROOT) && git diff --name-only --no-color --relative HEAD~1 ':!*.patch' | grep '.py$$' | xargs -n 1 \
-               pycodestyle --show-source --ignore=W504,E126,E241,E226,E305,E704,E741,E722 -v ||\
+               cd $(WS_ROOT) && git diff --name-only --no-color --relative HEAD~1 ':!*.patch' | grep '.py$$' | xargs -I XXX \
+               pycodestyle --show-source --ignore=W504,E126,E241,E226,E305,E704,E741,E722 -v XXX ||\
                (echo \"*********************************************************************\" &&\
                 echo \"* Test framework PEP8 compliance check FAILED (checked changed files)\" &&\
                 echo \"*********************************************************************\" &&\