[tidy] Bail out when a warning/error is found

scripts/clang-tidy.sh

@@ -17,5 +17,18 @@ command -v ${CLANG_TIDY} >/dev/null 2>&1 || {
 
 cd $1
 
+function check_tidy() {
+    OUTPUT=$(${CLANG_TIDY} $0 -p=. -header-filter='mbgl' 2>/dev/null)
+    if [[ -n $OUTPUT ]]; then
+        echo "Error: A clang-tidy warning/error happened:"
+        echo -e "$OUTPUT"
+        exit 1
+    fi
+}
+
+export CLANG_TIDY
+export -f check_tidy
+
+echo "Running clang-tidy checks... (this might take a while)"
 git ls-files '../../../src/mbgl/*.cpp' '../../../platform/*.cpp' '../../../test/*.cpp' | \
-    xargs -I{} -P ${JOBS} ${CLANG_TIDY} {} -p=. -header-filter='mbgl' || exit 1
+    xargs -I{} -P ${JOBS} bash -c 'check_tidy' {}