Test with git diff HEAD^1

Author: VarunNagaraju

.circleci/config.yml

@@ -45,12 +45,13 @@ jobs:
             git fetch --no-tags --no-recurse-submodules target $BASE_BRANCH
 
             echo "Checking clang-format results"
-            git diff -U0 "$(git merge-base HEAD target/$BASE_BRANCH)" *.c *.cc *.cpp *.h *.hpp *.i *.ic *.ih | clang-format-diff-$COMPILER_VERSION -style=file -p1 >_GIT_DIFF
+            git diff HEAD^1 --name-only
+            git diff -U0 --no-color HEAD^1 *.c *.cc *.cpp *.h *.hpp *.i *.ic *.ih | clang-format-diff-$COMPILER_VERSION -style=file -p1 >_GIT_DIFF
             if [ ! -s _GIT_DIFF ]; then
-               echo The last git commit is clang-formatted;
+              echo The last git commit is clang-formatted;
             else
-               cat _GIT_DIFF;
-              #  false;
+              cat _GIT_DIFF;
+              #false;
             fi
 
             echo "Checking clang-tidy static code analysis results"