support cpplint code style checker (vesoft-inc#81)

CMakeLists.txt

@@ -226,3 +226,17 @@ add_custom_target(
     DEPENDS clean-all
 )
 
+set(PRE_COMMIT_HOOK ${CMAKE_CURRENT_SOURCE_DIR}/.git/hooks/pre-commit)
+if(EXISTS ${PRE_COMMIT_HOOK})
+	MESSAGE(STATUS "Remove pre commit hook")
+	FILE(REMOVE ${PRE_COMMIT_HOOK})
+endif()
+
+MESSAGE(STATUS "Create pre commit hook")
+execute_process(COMMAND "ln" "-s" ${CMAKE_CURRENT_SOURCE_DIR}/cpplint/style_checker.sh ${PRE_COMMIT_HOOK}
+	RESULT_VARIABLE result)
+IF(NOT ${result})
+  MESSAGE(STATUS "pre-commit hook create successed")
+ELSE()
+  MESSAGE(STATUS "pre-commit hook create failed")
+ENDIF()

cpplint/bin/style_checker.sh

@@ -0,0 +1,29 @@
+#!/bin/bash
+
+# Copyright (c) 2018 - present, VE Software Inc. All rights reserved
+#
+# This source code is licensed under Apache 2.0 License
+#  (found in the LICENSE.Apache file in the root directory)
+
+PROJECT_PATH=$(cd `dirname $0`; pwd)
+PROJECT_NAME="${PROJECT_PATH##*/}"
+CPPLINT_FILE=$PROJECT_PATH"/../../cpplint/cpplint.py"
+
+if [ $# -eq 0 ];then
+  CHECK_FILES=$(git diff --name-only HEAD)
+else
+  CHECK_FILES=$(find $1 -not \( -path src/CMakeFiles -prune \)  -not \( -path src/interface/gen-cpp2 -prune \) -name "*.[h]" -o -name "*.cpp" | grep -v 'GraphScanner.*' | grep -v 'GraphParser.*')
+fi
+
+CPPLINT_EXTENS=cpp,h
+CPPLINT_FITER=-whitespace/indent,-build/include_what_you_use,-readability/todo,-build/include,-build/header_guard
+python $CPPLINT_FILE --extensions=$CPPLINT_EXTENS --filter=$CPPLINT_FITER --linelength=100 $CHECK_FILES 2>&1 
+
+result=$?
+if [ $result -eq 0 ]
+then
+  exit 0
+else
+  echo "cpplint code style check failed, please fix and recommit."
+  exit 1
+fi