test.cmake

function(get-git-hash _git-hash)
  if(EXISTS "${CMAKE_SOURCE_DIR}/.git")
    execute_process(
      COMMAND git rev-parse HEAD
      WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}
      OUTPUT_VARIABLE GIT_HASH
      OUTPUT_STRIP_TRAILING_WHITESPACE
    )
  else()
    set(GIT_HASH "NO_GIT_COMMIT_HASH_DEFINED")
  endif()
  set(${_git-hash} "${GIT_HASH}" PARENT_SCOPE)
endfunction(get-git-hash)