Add SetBuildNr cmake function

cmake/functions/Utils.cmake

@@ -7,4 +7,16 @@ function(FindCmakeConfigDirs BASE_DIR OUTPUT_NAME)
     endforeach()
     list(REMOVE_DUPLICATES PACKAGE_SUB_DIRS)
     set(${OUTPUT_NAME} ${PACKAGE_SUB_DIRS} PARENT_SCOPE)
+endfunction()
+
+function(SetBuildNr BN_SHORT BN_LONG)
+    set(BUILD_NR "0")
+    if (DEFINED ENV{CI})
+        set(BUILD_NR "$ENV{GITHUB_RUN_NUMBER}")
+        message("Running in CI mode, setting Build Nr: ${BUILD_NR}")
+    endif()
+    # Build number is <ci_build_nr>.<date>.<time>
+    string(TIMESTAMP BUILD_TIMESTAMP "%y%m%d.%H%M" UTC)
+    set(${BN_LONG} "${BUILD_NR}.${BUILD_TIMESTAMP}" PARENT_SCOPE)
+    set(${BS_SHORT} "${BUILD_NR}" PARENT_SCOPE)
 endfunction()