chore: add clang format helper tool

Author: Bambooin

script/clang-format.sh

@@ -0,0 +1,34 @@
+#!/usr/bin/env bash
+
+# clang format options
+method="-i"
+
+while getopts "in" option; do
+	case "${option}" in
+	i) # format code
+		method="-i"
+		;;
+	n) # dry run and changes formatting warnings to errors
+		method="--dry-run --Werror"
+		;;
+	\?) # invalid option
+		echo "invalid option, please use -i or -n."
+		exit 1
+		;;
+	esac
+done
+
+# array of folders to format
+native_path=(
+	"app/src/main/jni/librime_jni/*.h"
+	"app/src/main/jni/librime_jni/*.cc"
+)
+
+# iterate over all files in current entry
+for entry in "${native_path[@]}"; do
+	clang-format --verbose ${method} -style='file' ${entry}
+	if [ "$?" -ne 0 ]; then
+		echo "please format the code: make style-apply"
+		exit 1
+	fi
+done