cli-setup

Example use taken from madlang's Setup.hs file:

import           Distribution.CommandLine
import           Distribution.Simple

main :: IO ()
main = setManpath *>
    writeManpages "man/madlang.1" "madlang.1" *>
    writeBashCompletions "madlang" *>
    defaultMain

Be sure to add man/madlang.1 (or whatever the path to your source file is) to your .cabal file's extra-source-files field.