macro(today RESULT)
  if(WIN32)
    execute_process(COMMAND "cmd" " /C date /T" OUTPUT_VARIABLE ${RESULT})
    string(REGEX REPLACE "(..)/(..)/(....).*" "\\1.\\2.\\3" ${RESULT} ${${RESULT}})
    string(SUBSTRING ${${RESULT}} 0 10 ${RESULT})
  elseif(UNIX)
    execute_process(COMMAND "date" "+%Y-%m-%d" OUTPUT_VARIABLE ${RESULT})
    string(REGEX REPLACE "(....)-(..)-(..).*" "\\1-\\2-\\3" ${RESULT} ${${RESULT}})
  else(WIN32)
    message(SEND_ERROR "date not implemented")
    set(${RESULT} 00.00.0000)
  endif(WIN32)
endmacro(today)

macro(now RESULT)
  if(WIN32)
    execute_process(COMMAND "cmd" " /C time /T" OUTPUT_VARIABLE ${RESULT})
    string(REGEX REPLACE "(..):(..).*" "\\1:\\2:00" ${RESULT} ${${RESULT}})
  elseif(UNIX)
    execute_process(COMMAND "date" "+%H:%M:%S" OUTPUT_VARIABLE ${RESULT})
    string(REGEX REPLACE "(..):(..):(..).*" "\\1:\\2:\\3" ${RESULT} ${${RESULT}})
  else(WIN32)
    message(SEND_ERROR "time not implemented")
    set(${RESULT} 00:00:00)
  endif(WIN32)
endmacro(now)

macro(git_id RESULT)
  if(WIN32)
    execute_process(COMMAND "cmd" " /C git --git-dir=${PROJECT_SOURCE_DIR}/.git rev-parse HEAD" OUTPUT_VARIABLE ${RESULT})
    string(REGEX REPLACE "(.*)\n" "\\1" ${RESULT} ${${RESULT}})
  elseif(UNIX)
    execute_process(COMMAND "git" "--git-dir=${PROJECT_SOURCE_DIR}/.git" "rev-parse" "HEAD" OUTPUT_VARIABLE ${RESULT})
    string(REGEX REPLACE "(.*)\n" "\\1" ${RESULT} ${${RESULT}})
  else(WIN32)
    message(SEND_ERROR "Git ID implemented")
    set(${RESULT} 0)
  endif(WIN32)
endmacro(git_id)