我的Haskell程序或库如何找到它的版本号?

这得到了阴谋集团的大力支持。如下(来自xmonad):

导入 Paths_$myprogram

import Paths_xmonad (version)
import Data.Version (showVersion)

路径:$myprogram :

case args of
     ["--version"] -> putStrLn ("xmonad " ++ showVersion version)

dist/build/autogen/

version,
getBinDir, getLibDir, getDataDir, getLibexecDir,
getDataFileName