Polish the CMakeList. (#5694)

Co-authored-by: Ubuntu <ubuntu@ip-172-31-28-63.ap-northeast-1.compute.internal>
Co-authored-by: peizhou001 <110809584+peizhou001@users.noreply.github.com>

graphbolt/CMakeLists.txt

 cmake_minimum_required(VERSION 3.5)
 project(graphbolt C CXX)
 
-# Find PyTorch cmake files and PyTorch versions with the python interpreter $PYTHON_INTERP
-# ("python3" or "python" if empty)
+# Find PyTorch cmake files and PyTorch versions with the python interpreter
+# $PYTHON_INTERP ("python3" or "python" if empty)
 if(NOT PYTHON_INTERP)
   find_program(PYTHON_INTERP NAMES python3 python)
 endif()
+
 message(STATUS "Using Python interpreter: ${PYTHON_INTERP}")
+
 file(TO_NATIVE_PATH ${CMAKE_CURRENT_SOURCE_DIR}/find_cmake.py FIND_CMAKE_PY)
 execute_process(
   COMMAND ${PYTHON_INTERP} ${FIND_CMAKE_PY}
   OUTPUT_VARIABLE TORCH_PREFIX_VER
-  OUTPUT_STRIP_TRAILING_WHITESPACE)
+  OUTPUT_STRIP_TRAILING_WHITESPACE
+)
+
 message(STATUS "find_cmake.py output: ${TORCH_PREFIX_VER}")
 list(GET TORCH_PREFIX_VER 0 TORCH_PREFIX)
 list(GET TORCH_PREFIX_VER 1 TORCH_VER)
+
 message(STATUS "Configuring for PyTorch ${TORCH_VER}")
 string(REPLACE "." ";" TORCH_VERSION_LIST ${TORCH_VER})
 
@@ -24,6 +29,7 @@ endif()
 
 set(Torch_DIR "${TORCH_PREFIX}/Torch")
 message(STATUS "Setting directory to ${Torch_DIR}")
+
 find_package(Torch REQUIRED)
 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${TORCH_C_FLAGS}")
 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${TORCH_CXX_FLAGS}")
@@ -34,18 +40,18 @@ set(LIB_GRAPHBOLT_NAME "graphbolt_pytorch_${TORCH_VER}")
 set(BOLT_DIR "${CMAKE_CURRENT_SOURCE_DIR}/src")
 set(BOLT_INCLUDE "${CMAKE_CURRENT_SOURCE_DIR}/include")
 file(GLOB BOLT_HEADERS ${BOLT_INCLUDE})
-file(GLOB BOLT_SRC
-  ${BOLT_DIR}/*.cc
-)
+file(GLOB BOLT_SRC ${BOLT_DIR}/*.cc)
+
 add_library(${LIB_GRAPHBOLT_NAME} SHARED ${BOLT_SRC} ${BOLT_HEADERS})
-target_include_directories(
-  ${LIB_GRAPHBOLT_NAME} PRIVATE ${BOLT_DIR} ${BOLT_HEADERS})
+target_include_directories(${LIB_GRAPHBOLT_NAME} PRIVATE ${BOLT_DIR}
+                           ${BOLT_HEADERS})
 target_link_libraries(${LIB_GRAPHBOLT_NAME} "${TORCH_LIBRARIES}")
 
 # The Torch CMake configuration only sets up the path for the MKL library when
 # using the conda distribution. The following is a workaround to address this
 # when using a standalone installation of MKL.
 if(DEFINED MKL_LIBRARIES)
-  target_link_directories(${LIB_GRAPHBOLT_NAME} PRIVATE ${MKL_ROOT}/lib/${MKL_ARCH})
+  target_link_directories(${LIB_GRAPHBOLT_NAME} PRIVATE
+                          ${MKL_ROOT}/lib/${MKL_ARCH})
 endif()