test git separately -trap

ci/files_changed.sh

@@ -20,11 +20,20 @@ trap 'echo "An unexpected error occurred during file change check."; echo "check
 #  base_ref="origin/$GITHUB_BASE_REF"
 #fi
 
-# Check if the base ref exists before running the git diff
-if git rev-parse --abbrev-ref HEAD | grep -q ^main$ || git fetch origin "$GITHUB_BASE_REF" && git diff --name-only "origin/$GITHUB_BASE_REF" | grep -E "$1" ; then
+if git rev-parse --abbrev-ref HEAD | grep -q ^main$ ; then
   echo "Relevant file changes detected!"
   echo "check_result=0" >> "$GITHUB_OUTPUT"
-  exit 0  # Relevant changes detected
+  exit 0
+fi
+
+# Run git diff and store output
+diff_output=$(git diff --name-only "origin/$GITHUB_BASE_REF") || exit 1  # Ensure git diff failures are caught
+
+# Check for relevant file changes
+if echo "$diff_output" | grep -E "$1" ; then
+  echo "Relevant file changes detected!"
+  echo "check_result=0" >> "$GITHUB_OUTPUT"
+  exit 0
 else
   echo "No relevant changes found."
   echo "check_result=2" >> "$GITHUB_OUTPUT"