module CabalBounds.Main
( cabalBounds
) where
import Distribution.PackageDescription (GenericPackageDescription)
import Distribution.PackageDescription.Parse (parsePackageDescription, ParseResult(..))
import Distribution.PackageDescription.PrettyPrint (showGenericPackageDescription)
import Distribution.Simple.Configure (ConfigStateFileErrorType(..), tryGetConfigStateFile)
import Distribution.Simple.LocalBuildInfo (LocalBuildInfo)
import qualified Distribution.Simple.LocalBuildInfo as BI
import qualified Distribution.Package as P
import qualified Distribution.Simple.PackageIndex as PX
import qualified Distribution.InstalledPackageInfo as PI
import qualified Distribution.Version as V
import qualified CabalBounds.Args as A
import qualified CabalBounds.Bound as B
import qualified CabalBounds.Sections as S
import qualified CabalBounds.Dependencies as DP
import qualified CabalBounds.Drop as D
import qualified CabalBounds.Update as U
import qualified CabalBounds.HaskellPlatform as HP
import qualified System.IO.Strict as SIO
import Control.Applicative ((<$>))
import Control.Monad.Trans.Either (EitherT, runEitherT, bimapEitherT, hoistEither, left, right)
import Control.Monad.IO.Class
import qualified Data.HashMap.Strict as HM
type Error = String
cabalBounds :: A.Args -> IO (Maybe Error)
cabalBounds args@A.Drop {} =
leftToJust <$> runEitherT (do
pkgDescrp <- packageDescription $ A.cabalFile args
let pkgDescrp' = D.drop (B.boundOfDrop args) (S.sections args pkgDescrp) (DP.dependencies args) pkgDescrp
liftIO $ writeFile (A.outputFile args) (showGenericPackageDescription pkgDescrp'))
cabalBounds args@A.Update {} =
leftToJust <$> runEitherT (do
pkgDescrp <- packageDescription $ A.cabalFile args
libs <- libraries setupConfigFile (A.haskellPlatform args)
let pkgDescrp' = U.update (B.boundOfUpdate args) (S.sections args pkgDescrp) (DP.dependencies args) libs pkgDescrp
liftIO $ writeFile (A.outputFile args) (showGenericPackageDescription pkgDescrp'))
where
setupConfigFile
| (file:_) <- A.setupConfigFile args
= file
| otherwise
= ""
packageDescription :: FilePath -> EitherT Error IO GenericPackageDescription
packageDescription file = do
contents <- liftIO $ SIO.readFile file
case parsePackageDescription contents of
ParseFailed error -> left $ show error
ParseOk _ pkgDescrp -> right pkgDescrp
type SetupConfigFile = String
libraries :: SetupConfigFile -> HP.HPVersion -> EitherT Error IO U.Libraries
libraries "" "" = left "Missing setup config file and haskell platform version"
libraries confFile "" = installedLibraries confFile
libraries "" hpVersion = haskellPlatformLibraries hpVersion
libraries confFile hpVersion = do
instLibs <- installedLibraries confFile
hpLibs <- haskellPlatformLibraries hpVersion
right $ HM.union hpLibs instLibs
haskellPlatformLibraries :: HP.HPVersion -> EitherT Error IO U.Libraries
haskellPlatformLibraries hpVersion =
case hpVersion of
"current" -> right . HM.fromList $ HP.currentLibraries
"previous" -> right . HM.fromList $ HP.previousLibraries
version | Just libs <- HP.librariesOf version -> right . HM.fromList $ libs
| otherwise -> left $ "Invalid haskell platform version '" ++ version ++ "'"
installedLibraries :: SetupConfigFile -> EitherT Error IO U.Libraries
installedLibraries confFile = do
binfo <- liftIO $ tryGetConfigStateFile confFile
bimapEitherT show buildInfoLibs (hoistEither binfo)
where
buildInfoLibs :: LocalBuildInfo -> U.Libraries
buildInfoLibs = HM.fromList
. map (\(P.PackageName n, v) -> (n, newestVersion v))
. filter ((not . null) . snd)
. PX.allPackagesByName . BI.installedPkgs
newestVersion :: [PI.InstalledPackageInfo] -> V.Version
newestVersion = maximum . map (P.pkgVersion . PI.sourcePackageId)
leftToJust :: Either a b -> Maybe a
leftToJust = either Just (const Nothing)
deriving instance Show ConfigStateFileErrorType