diff --git a/run-clang-tidy.sh b/run-clang-tidy.sh
index 3abd4f469b..662ef949d0 100755
--- a/run-clang-tidy.sh
+++ b/run-clang-tidy.sh
@@ -1,10 +1,16 @@
-#!/bin/sh -x
+#!/bin/sh
 
 if [ $# -ne 1 ] || [ "$1" = "-h" ] || [ "$1" = "--help" ]; then
   echo "$0 <build-path>"
+  echo "Set env var 'base_sha'  to upstream/next hash and 'head_sha' and your current HEAD hash."
   exit 1
 fi
 
+if [ -z $base_sha ] || [ -z $head_sha ]; then
+  echo "Set env var 'base_sha'  to upstream/next hash and 'head_sha' and your current HEAD hash."
+  exit 0
+fi
+
 BUILD_PATH="$1"
 
 clang-tidy $(find ./arch ./*.c -type f -iregex ".*\.[c]") -p "$BUILD_PATH" -checks=clang-analyzer-*,-clang-analyzer-cplusplus* > ct-warnings.txt
@@ -46,6 +52,8 @@ if [ -z $needs_fixes ]; then
   exit 0
 fi
 
+cat ct-warnings.txt
+
 echo -e "\n\nclang-tidy warnings for: $faulty_files\n"
 echo "Please fix them. Or, if completely unrelated, let us know."