Add versioning to logiops binaries

CMakeLists.txt

@@ -11,4 +11,41 @@ set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} -O0 -Wall -Wextra")
 set(CMAKE_CXX_STANDARD 14)
 set(CMAKE_CXX_STANDARD_REQUIRED ON)
 
+find_package(Git)
+
+# Set version number
+if(EXISTS ${CMAKE_SOURCE_DIR}/version.txt)
+    file(READ version.txt LOGIOPS_VERSION)
+    string(REGEX REPLACE "\n$" "" LOGIOPS_VERSION ${LOGIOPS_VERSION})
+endif()
+
+if(GIT_FOUND AND EXISTS ${CMAKE_SOURCE_DIR}/.git)
+    execute_process(COMMAND ${GIT_EXECUTABLE}
+            rev-parse --abbrev-ref HEAD
+            OUTPUT_VARIABLE LOGIOPS_GIT_BRANCH)
+    string(REGEX REPLACE "\n$" "" LOGIOPS_GIT_BRANCH ${LOGIOPS_GIT_BRANCH})
+    if(LOGIOPS_GIT_BRANCH MATCHES "^tags/?")
+        STRING(REGEX REPLACE "^tags/" ""
+                LOGIOPS_VERSION ${LOGIOPS_GIT_BRANCH})
+    else()
+        execute_process(COMMAND ${GIT_EXECUTABLE}
+                rev-parse --short HEAD
+                OUTPUT_VARIABLE LOGIOPS_COMMIT_HASH)
+        string(REGEX REPLACE "\n$" "" LOGIOPS_COMMIT_HASH ${LOGIOPS_COMMIT_HASH})
+        if(LOGIOPS_VERSION)
+            string(APPEND LOGIOPS_VERSION -${LOGIOPS_COMMIT_HASH})
+        else()
+            set(LOGIOPS_VERSION git-${LOGIOPS_COMMIT_HASH})
+        endif()
+    endif()
+endif()
+
+if(LOGIOPS_VERSION)
+    message("LogiOps Version Number: ${LOGIOPS_VERSION}")
+else()
+    set(LOGIOPS_VERSION "null")
+endif()
+
+add_definitions( -DLOGIOPS_VERSION="${LOGIOPS_VERSION}")
+
 add_subdirectory(src/logid)