wai-middleware-content-type-0.0.3.3: Setup.hs

import Distribution.Simple
import Distribution.Simple.PreProcess
import Distribution.Simple.Setup (ConfigFlags(..))
import Distribution.PackageDescription (PackageDescription(..), FlagName(..))
import Distribution.Simple.Utils ( rawSystemExitCode, findProgramVersion )
import System.Exit
import Distribution.Verbosity ( Verbosity )
import Distribution.Simple.Utils (info, notice, installOrdinaryFiles)
import Distribution.Simple.Setup
import Distribution.Simple.Program (simpleProgram, Program(..))
import Distribution.Simple.LocalBuildInfo
import Data.Version
import Control.Monad (when)
import qualified Control.Exception as E

main :: IO ()
main = defaultMainWithHooks $ simpleUserHooks {
      -- enable hsb2hs preprocessor for .hsb files
      hookedPreProcessors = [ppBlobSuffixHandler]
    , hookedPrograms = [(simpleProgram "hsb2hs"){
                           programFindVersion = \verbosity fp ->
                             findProgramVersion "--version" id verbosity fp }]
    , postCopy = installManPage
    }

ppBlobSuffixHandler :: PPSuffixHandler
ppBlobSuffixHandler = ("hsb", \_ lbi ->
  PreProcessor {
    platformIndependent = True,
    runPreProcessor = mkSimplePreProcessor $ \infile outfile verbosity ->
      do let embedData = case lookup (FlagName "embed_data_files")
                              (configConfigurationsFlags (configFlags lbi)) of
                              Just True -> True
                              _         -> False
         when embedData $
            do info verbosity $ "Preprocessing " ++ infile ++ " to " ++ outfile
               ec <- rawSystemExitCode verbosity "hsb2hs"
                          [infile, infile, outfile]
               case ec of
                    ExitSuccess   -> return ()
                    ExitFailure _ -> error "hsb2hs is needed to build this program"
  })

installManPage :: Args -> CopyFlags
               -> PackageDescription -> LocalBuildInfo -> IO ()
installManPage _ flags pkg lbi = do
  let verbosity = fromFlag (copyVerbosity flags)
  let copydest  = fromFlag (copyDest flags)
  let mandest   = mandir (absoluteInstallDirs pkg lbi copydest)
                     ++ "/man1"
  notice verbosity $ "Copying man page to " ++ mandest
  installOrdinaryFiles verbosity mandest [("man", "wai-middleware-content-type.1")]