Print diff in case of clang-format output

.travis/build.sh

@@ -5,6 +5,12 @@ set -x
 cmake -G Ninja -DCMAKE_BUILD_TYPE=$BUILD_TYPE $EXTRA_CMAKE_FLAGS -DBUILD_TESTING=ON .. || exit 1
 # grep returns number of items found. each change is enclosed into <replacement>
 # tag in the xml. Thus if no changes needed, 0 will be returned
-cmake --build . --target clang-format-ci -- -v | grep -c "<replacement " && exit 1
+cmake --build . --target clang-format -- -v
+if [[ $(git diff) ]]; then
+    git diff | cat
+    exit 1
+else
+    echo "Success!"
+fi
 cmake --build . -- -v || exit 1
 ASAN_OPTIONS=alloc_dealloc_mismatch=0 ctest . || exit 1

modules/clang-cxx-dev-tools.cmake

@@ -19,13 +19,6 @@ if(CLANG_FORMAT)
             -style=file
             ${ALL_CXX_SOURCE_FILES}
     )
-    add_custom_target(
-            clang-format-ci
-            COMMAND clang-format
-            -output-replacements-xml
-            -style=file
-            ${ALL_CXX_SOURCE_FILES}
-    )
 endif()
 
 # Adding clang-tidy target if executable is found