xrCore: add to CMake getting git branch and revision for log output

src/xrCore/CMakeLists.txt

@@ -23,8 +23,23 @@ include_directories(
     ${SDL_INCLUDE_DIRS}
     ${TBB_INCLUDE_DIRS}
 )
+execute_process(COMMAND git rev-parse --verify HEAD
+    WORKING_DIRECTORY "${CMAKE_SOURCE_DIR}"
+    OUTPUT_VARIABLE GIT_SHA1
+    ERROR_QUIET
+    OUTPUT_STRIP_TRAILING_WHITESPACE)
 
-add_definitions(-DXRCORE_EXPORTS)
+message( "commit: " ${GIT_SHA1})
+
+execute_process(COMMAND git rev-parse --abbrev-ref HEAD
+    WORKING_DIRECTORY "${CMAKE_SOURCE_DIR}"
+    OUTPUT_VARIABLE GIT_BRANCH
+    ERROR_QUIET
+    OUTPUT_STRIP_TRAILING_WHITESPACE)
+
+message( "branch: " ${GIT_BRANCH} )
+
+add_definitions(-DXRCORE_EXPORTS -DGIT_INFO_CURRENT_COMMIT="${GIT_SHA1}" -DGIT_INFO_CURRENT_BRANCH="${GIT_BRANCH}")
 add_library(${PROJECT_NAME} SHARED ${${PROJECT_NAME}__SOURCES} ${${PROJECT_NAME}__INCLUDES})
 
 set_target_properties(${PROJECT_NAME} PROPERTIES COTIRE_CXX_PREFIX_HEADER_INIT "stdafx.h")