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{-# LANGUAGE CPP #-}
import Distribution.Simple
import Distribution.Simple.PreProcess
import Distribution.Simple.Setup
(copyDest, copyVerbosity, fromFlag, installVerbosity, BuildFlags(..))
import Distribution.PackageDescription (PackageDescription(..), Executable(..))
import Distribution.Simple.LocalBuildInfo
(LocalBuildInfo(..), absoluteInstallDirs)
import Distribution.Verbosity ( Verbosity, silent )
import Distribution.Simple.InstallDirs (mandir, CopyDest (NoCopyDest))
import Distribution.Simple.Utils (installOrdinaryFiles, info)
import Prelude hiding (catch)
import System.Process ( rawSystem )
import System.FilePath ( (</>) )
import System.Directory ( findExecutable )
import System.Exit
main :: IO ()
main = do
defaultMainWithHooks $ simpleUserHooks {
postBuild = makeManPages
, postCopy = \ _ flags pkg lbi ->
installManpages pkg lbi (fromFlag $ copyVerbosity flags)
(fromFlag $ copyDest flags)
, postInst = \ _ flags pkg lbi ->
installManpages pkg lbi (fromFlag $ installVerbosity flags) NoCopyDest
, 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"] }
, hookedPreProcessors = [ppBlobSuffixHandler]
}
exitWith ExitSuccess
-- | Build man pages from markdown sources in man/
makeManPages :: Args -> BuildFlags -> PackageDescription -> LocalBuildInfo -> IO ()
makeManPages _ flags _ lbi = do
let verbosity = fromFlag $ buildVerbosity flags
let args = ["--verbose" | verbosity /= silent]
rawSystem (buildDir lbi </> "make-pandoc-man-pages" </> "make-pandoc-man-pages")
args >>= exitWith
manpages :: [FilePath]
manpages = ["man1" </> "pandoc.1"
,"man5" </> "pandoc_markdown.5"]
manDir :: FilePath
manDir = "man"
installManpages :: PackageDescription -> LocalBuildInfo
-> Verbosity -> CopyDest -> IO ()
installManpages pkg lbi verbosity copy =
installOrdinaryFiles verbosity (mandir (absoluteInstallDirs pkg lbi copy))
(zip (repeat manDir) manpages)
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 ()
})
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