Fix clang-format script (#53)

tools/ci_scripts/clang-format-test.sh

@@ -9,12 +9,19 @@ if [ ! -z "$(git status --untracked-files=no  --porcelain)" ]; then
 fi
 
 echo
-echo "Checking formatting using the following clang-format version:"
-clang-format --version
+
+if type clang-format-8 2>/dev/null; then
+    echo "Checking formatting using the following clang-format version:"
+    clang-format-8 --version
+else
+    echo "clang-format-8 not correctly installed"
+    exit 1
+fi
+
 echo
 
 # perform clang-format on all cpp-files
-find elsa/ -name '*.h' -or -name '*.hpp' -or -name '*.cpp' -or -name '*.cu' -or -name '*.cuh' | xargs clang-format -i -style=file $1
+find elsa/ -name '*.h' -or -name '*.hpp' -or -name '*.cpp' -or -name '*.cu' -or -name '*.cuh' | xargs clang-format-8 -i -style=file $1
 
 # check if something was modified
 notcorrectlist=`git status --porcelain | grep '^ M' | cut -c4-`
@@ -28,7 +35,7 @@ else
   git diff --stat $notcorrectlist
   echo "Please run"
   echo
-  echo "find elsa/ -name '*.h' -or -name '*.hpp' -or -name '*.cpp' -or -name '*.cu' -or -name '*.cuh' | xargs clang-format -i -style=file $1"
+  echo "find elsa/ -name '*.h' -or -name '*.hpp' -or -name '*.cpp' -or -name '*.cu' -or -name '*.cuh' | xargs clang-format-8 -i -style=file $1"
   echo
   echo "to solve the issue."
   # cleanup changes in git