Setup.hs

{-
Copyright (C) 2006-2014 John MacFarlane <jgm@berkeley.edu>

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
-}

import Distribution.Simple
import Distribution.Simple.PreProcess
import Distribution.PackageDescription (PackageDescription(..), Executable(..))
import System.Process ( rawSystem )
import System.FilePath ( (</>) )
import System.Directory ( findExecutable )
import Distribution.Simple.Utils (info)

main :: IO ()
main = defaultMainWithHooks $ simpleUserHooks {
      -- enable hsb2hs preprocessor for .hsb files
      hookedPreProcessors = [ppBlobSuffixHandler]
      -- ensure that make-pandoc-man-pages doesn't get installed to bindir
    , copyHook = \pkgdescr ->
         (copyHook simpleUserHooks) pkgdescr{ executables =
            [x | x <- executables pkgdescr, exeName x /= "make-pandoc-man-pages"] }
    , instHook = \pkgdescr ->
         (instHook simpleUserHooks) pkgdescr{ executables =
            [x | x <- executables pkgdescr, exeName x /= "make-pandoc-man-pages"] }
    }

ppBlobSuffixHandler :: PPSuffixHandler
ppBlobSuffixHandler = ("hsb", \_ _ ->
  PreProcessor {
    platformIndependent = True,
    runPreProcessor = mkSimplePreProcessor $ \infile outfile verbosity ->
      do info verbosity $ "Preprocessing " ++ infile ++ " to " ++ outfile
         hsb2hsPath <- findExecutable "hsb2hs"
         case hsb2hsPath of
            Just p  -> rawSystem p [infile, infile, outfile]
            Nothing -> error "hsb2hs is needed to build this program: cabal install hsb2hs"
         return ()
  })