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{-# OPTIONS_GHC -Wall #-}
import System.FilePath ( (</>), (<.>) )
import Distribution.PackageDescription
import Distribution.Simple
import Distribution.Simple.BuildPaths ( autogenModulesDir )
import Distribution.Simple.LocalBuildInfo
import Distribution.Simple.Setup as S
import Distribution.Simple.Utils
import Distribution.Text ( display )
import Distribution.ModuleName (ModuleName)
import qualified Distribution.ModuleName as ModuleName
import qualified GetText as GetText
main :: IO ()
main = defaultMainWithHooks $ installBustleHooks simpleUserHooks
-- Okay, so we want to use hgettext's install hook, but not the hook that
-- miraculously runs all our code through CPP just to add a couple of
-- constants. (cpp doesn't like multi-line Haskell strings, so this is not
-- purely an academic preference.)
--
-- Instead, we generate GetText_bustle.hs which contains the constants, in the
-- same way as Paths_bustle.hs gets generated by Cabal. Much neater.
--
-- TODO: upstream this to hgettext
installBustleHooks :: UserHooks
-> UserHooks
installBustleHooks uh = uh
{ postInst = \a b c d -> do
postInst uh a b c d
GetText.installPOFiles a b c d
, buildHook = \pkg lbi hooks flags -> do
writeGetTextConstantsFile pkg lbi flags
buildHook uh pkg lbi hooks flags
}
writeGetTextConstantsFile :: PackageDescription -> LocalBuildInfo -> BuildFlags -> IO ()
writeGetTextConstantsFile pkg lbi flags = do
let verbosity = fromFlag (buildVerbosity flags)
createDirectoryIfMissingVerbose verbosity True (autogenModulesDir lbi)
let pathsModulePath = autogenModulesDir lbi
</> ModuleName.toFilePath (getTextConstantsModuleName pkg) <.> "hs"
rewriteFile pathsModulePath (generateModule pkg lbi)
getTextConstantsModuleName :: PackageDescription -> ModuleName
getTextConstantsModuleName pkg_descr =
ModuleName.fromString $
"GetText_" ++ fixedPackageName pkg_descr
-- Cargo-culted from two separate places in Cabal!
fixedPackageName :: PackageDescription -> String
fixedPackageName = map fixchar . display . packageName
where fixchar '-' = '_'
fixchar c = c
generateModule :: PackageDescription -> LocalBuildInfo -> String
generateModule pkg lbi =
header ++ body
where
moduleName = getTextConstantsModuleName pkg
header =
"module " ++ display moduleName ++ " (\n"++
" getMessageCatalogDomain,\n" ++
" getMessageCatalogDir\n" ++
") where\n"++
"\n" ++
"import qualified Control.Exception as Exception\n" ++
"import System.Environment (getEnv)\n"
body =
"catchIO :: IO a -> (Exception.IOException -> IO a) -> IO a\n" ++
"catchIO = Exception.catch\n" ++
"\n" ++
"getMessageCatalogDomain :: IO String\n" ++
"getMessageCatalogDomain = return " ++ show dom ++ "\n" ++
"\n" ++
"messageCatalogDir :: String\n" ++
"messageCatalogDir = " ++ show tar ++ "\n" ++
"\n" ++
"getMessageCatalogDir :: IO FilePath\n" ++
"getMessageCatalogDir = catchIO (getEnv \"" ++ fixedPackageName pkg ++ "_localedir\") (\\_ -> return messageCatalogDir)\n"
sMap = customFieldsPD (localPkgDescr lbi)
dom = GetText.getDomainNameDefault sMap (GetText.getPackageName lbi)
tar = GetText.targetDataDir lbi
-- Cargo-culted from hgettext
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