ghc-mod/core/GhcMod/World.hs
Daniel Gröber 35690941aa Reorganize module namespace
- Remove Language.Haskell prefix from all modules
- Move 'GHCMod.*' to 'GhcMod.Exe'
- Move 'GhcModExe' to 'GhcMod.Exe'
2017-05-28 04:23:37 +02:00

56 lines
1.6 KiB
Haskell

module GhcMod.World where
import GhcMod.GhcPkg
import GhcMod.PathsAndFiles
import GhcMod.Types
import GhcMod.Monad.Types
import GhcMod.Utils
import Control.Applicative
import Data.Maybe
import Data.Traversable hiding (mapM)
import System.FilePath ((</>))
import GHC.Paths (libdir)
import Prelude
data World = World {
worldPackageCaches :: [TimedFile]
, worldCabalFile :: Maybe TimedFile
, worldCabalConfig :: Maybe TimedFile
, worldCabalSandboxConfig :: Maybe TimedFile
, worldMappedFiles :: FileMappingMap
} deriving (Eq)
timedPackageCaches :: IOish m => GhcModT m [TimedFile]
timedPackageCaches = do
fs <- mapM (liftIO . mightExist) . map (</> packageCache)
=<< getPackageCachePaths libdir
(liftIO . timeFile) `mapM` catMaybes fs
getCurrentWorld :: IOish m => GhcModT m World
getCurrentWorld = do
crdl <- cradle
pkgCaches <- timedPackageCaches
mCabalFile <- liftIO $ timeFile `traverse` cradleCabalFile crdl
mCabalConfig <- liftIO $ timeMaybe (setupConfigFile crdl)
mCabalSandboxConfig <- liftIO $ timeMaybe (sandboxConfigFile crdl)
mFileMap <- getMMappedFiles
return World {
worldPackageCaches = pkgCaches
, worldCabalFile = mCabalFile
, worldCabalConfig = mCabalConfig
, worldCabalSandboxConfig = mCabalSandboxConfig
, worldMappedFiles = mFileMap
}
didWorldChange :: IOish m => World -> GhcModT m Bool
didWorldChange world = do
(world /=) <$> getCurrentWorld
isYoungerThanSetupConfig :: FilePath -> World -> IO Bool
isYoungerThanSetupConfig file World {..} = do
tfile <- timeFile file
return $ worldCabalConfig < Just tfile