Refactored cmake scripts and test cases compile database handling

cmake/GitVersion.cmake

@@ -0,0 +1,25 @@
+find_package(Git)
+
+function(setup_git_version)
+    if(NOT DEFINED GIT_VERSION)
+        if(GIT_EXECUTABLE)
+            execute_process(
+                    COMMAND ${GIT_EXECUTABLE} describe --tags --always --abbrev=7
+                    WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
+                    OUTPUT_VARIABLE GIT_VERSION
+                    RESULT_VARIABLE GIT_ERROR_CODE
+                    OUTPUT_STRIP_TRAILING_WHITESPACE
+            )
+        endif(GIT_EXECUTABLE)
+    endif(NOT DEFINED GIT_VERSION)
+
+    if(NOT DEFINED GIT_VERSION)
+        set(GIT_VERSION "0.0.0-unknown" PARENT_SCOPE)
+    endif(NOT DEFINED GIT_VERSION)
+
+    string(REGEX MATCH "^([0-9]+)\\.([0-9]+)\\.(.+)"
+            GIT_VERSION_MATCH ${GIT_VERSION})
+    set(GIT_VERSION_MAJOR ${CMAKE_MATCH_1} PARENT_SCOPE)
+    set(GIT_VERSION_MINOR ${CMAKE_MATCH_2} PARENT_SCOPE)
+    set(GIT_VERSION_PATCH ${CMAKE_MATCH_3} PARENT_SCOPE)
+endfunction()