Update codeformat.sh

使用函数精简了代码，并提高可读性

codeformat.sh

@@ -2,12 +2,12 @@
 
 # we run clang-format and astyle twice to get stable format output
 
-find src/ tools/ tests/ examples/ benchmark/ python/ -type f -name '*.c' -o -name '*.cpp' -o -name '*.cc' -o -name '*.h' | grep -v python/pybind11 | grep -v stb_image | xargs -i clang-format -i {}
-astyle -n -r "benchmark/*.h,*.cpp,*.cc" "tests/*.h,*.cpp,*.cc" "tools/*.h,*.cpp,*.cc" "examples/*.h,*.cpp,*.cc"
-astyle -n -r "src/*.h,*.cpp,*.cc" --exclude=src/stb_image.h --exclude=src/stb_image_write.h
-astyle -n -r "python/*.h,*.cpp,*.cc" --exclude=python/pybind11
+format_code() {
+    find src/ tools/ tests/ examples/ benchmark/ python/ -type f -name '*.c' -o -name '*.cpp' -o -name '*.cc' -o -name '*.h' | grep -v python/pybind11 | grep -v stb_image | xargs -i clang-format -i {}
+    astyle -n -r "benchmark/*.h,*.cpp,*.cc" "tests/*.h,*.cpp,*.cc" "tools/*.h,*.cpp,*.cc" "examples/*.h,*.cpp,*.cc"
+    astyle -n -r "src/*.h,*.cpp,*.cc" --exclude=src/stb_image.h --exclude=src/stb_image_write.h
+    astyle -n -r "python/*.h,*.cpp,*.cc" --exclude=python/pybind11
+}
 
-find src/ tools/ tests/ examples/ benchmark/ python/ -type f -name '*.c' -o -name '*.cpp' -o -name '*.cc' -o -name '*.h' | grep -v python/pybind11 | grep -v stb_image | xargs -i clang-format -i {}
-astyle -n -r "benchmark/*.h,*.cpp,*.cc" "tests/*.h,*.cpp,*.cc" "tools/*.h,*.cpp,*.cc" "examples/*.h,*.cpp,*.cc"
-astyle -n -r "src/*.h,*.cpp,*.cc" --exclude=src/stb_image.h --exclude=src/stb_image_write.h
-astyle -n -r "python/*.h,*.cpp,*.cc" --exclude=python/pybind11
+format_code || { echo 'Formatting failed' ; exit 1; }//first time execute
+format_code || { echo 'Formatting failed' ; exit 1; }//second time execute