compiler/Build/Utils.hs · elk

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1{-# OPTIONS_GHC -W #-}

2module Build.Utils where

4import Control.Monad.Error

5import System.Directory (doesFileExist)

6import System.Environment (getEnv)

7import System.FilePath ((</>), replaceExtension)

8import qualified Build.Flags as Flag

9import qualified Build.Print as Print

10import qualified Paths_Elm as This

12buildPath :: Flag.Flags -> FilePath -> String -> FilePath

13buildPath flags filePath ext =

14 Flag.build_dir flags </> replaceExtension filePath ext

16cachePath :: Flag.Flags -> FilePath -> String -> FilePath

17cachePath flags filePath ext =

18 Flag.cache_dir flags </> replaceExtension filePath ext

20elmo :: Flag.Flags -> FilePath -> FilePath

21elmo flags filePath =

22 cachePath flags filePath "elmo"

24elmi :: Flag.Flags -> FilePath -> FilePath

25elmi flags filePath =

26 cachePath flags filePath "elmi"

28-- |The absolute path to a data file

29getDataFile :: FilePath -> IO FilePath

30getDataFile name = do

31 path <- This.getDataFileName name

32 exists <- doesFileExist path

33 if exists

34 then return path

35 else do

36 env <- getEnv "ELM_HOME"

37 return (env </> name)

39run :: ErrorT String IO a -> IO a

40run command = do

41 either <- runErrorT command

42 case either of

43 Left err -> Print.failure err

44 Right result -> return result