module GhcMod.Utils (
module GhcMod.Utils
, module Utils
, readProcess
) where
import Control.Applicative
import Data.Char
import qualified Data.Map as M
import Data.Maybe (fromMaybe)
import Data.Either (rights)
import Data.List (inits)
import Exception
import GhcMod.Error
import GhcMod.Types
import GhcMod.Monad.Types
import System.Directory
import System.Environment
import System.FilePath
import System.IO.Temp (createTempDirectory)
import System.Process (readProcess)
import Text.Printf
import Paths_ghc_mod (getLibexecDir, getBinDir)
import Utils
import Prelude
dropWhileEnd :: (a -> Bool) -> [a] -> [a]
dropWhileEnd p = foldr (\x xs -> if p x && null xs then [] else x : xs) []
withDirectory_ :: (MonadIO m, ExceptionMonad m) => FilePath -> m a -> m a
withDirectory_ dir action =
gbracket
(liftIO getCurrentDirectory)
(liftIO . setCurrentDirectory)
(\_ -> liftIO (setCurrentDirectory dir) >> action)
uniqTempDirName :: FilePath -> FilePath
uniqTempDirName dir =
"ghc-mod" ++ map escapeDriveChar drive ++ map escapePathChar path
where
(drive, path) = splitDrive dir
escapeDriveChar :: Char -> Char
escapeDriveChar c
| isAlphaNum c = c
| otherwise = '-'
escapePathChar :: Char -> Char
escapePathChar c
| c `elem` pathSeparators = '-'
| otherwise = c
newTempDir :: FilePath -> IO FilePath
newTempDir _dir =
flip createTempDirectory "ghc-mod" =<< getTemporaryDirectory
whenM :: Monad m => m Bool -> m () -> m ()
whenM mb ma = mb >>= flip when ma
ghcModExecutable :: IO FilePath
ghcModExecutable = do
exe <- getExecutablePath'
stack <- lookupEnv "STACK_EXE"
case takeBaseName exe of
"spec" | Just _ <- stack ->
(</> "ghc-mod") <$> getBinDir
"spec" ->
(</> "dist/build/ghc-mod/ghc-mod") <$> getCurrentDirectory
"ghc-mod" ->
return exe
_ ->
return $ takeDirectory exe </> "ghc-mod"
getExecutablePath' :: IO FilePath
#if __GLASGOW_HASKELL__ >= 706
getExecutablePath' = getExecutablePath
#else
getExecutablePath' = getProgName
#endif
canonFilePath :: FilePath -> IO FilePath
canonFilePath f = do
p <- canonicalizePath f
e <- doesFileExist p
when (not e) $ error $ "canonFilePath: not a file: " ++ p
return p
withMappedFile :: (IOish m, GmState m, GmEnv m) =>
forall a. FilePath -> (FilePath -> m a) -> m a
withMappedFile file action = getCanonicalFileNameSafe file >>= lookupMMappedFile >>= runWithFile
where
runWithFile (Just to) = action $ fmPath to
runWithFile _ = action file
getCanonicalFileNameSafe :: (IOish m, GmEnv m) => FilePath -> m FilePath
getCanonicalFileNameSafe fn = do
let fn' = normalise fn
pl <- liftIO $ rights <$> (mapM ((try :: IO FilePath -> IO (Either SomeException FilePath)) . canonicalizePath . joinPath) $ reverse $ inits $ splitPath' fn')
return $
if (length pl > 0)
then joinPath $ (head pl):(drop (length pl 1) (splitPath fn'))
else error "Current dir doesn't seem to exist?"
where
#if __GLASGOW_HASKELL__ < 710
splitPath' = (".":) . splitPath
#else
splitPath' = splitPath
#endif
mkRevRedirMapFunc :: (Functor m, GmState m, GmEnv m) => m (FilePath -> FilePath)
mkRevRedirMapFunc = do
rm <- M.fromList <$> map (uncurry mf) <$> M.toList <$> getMMappedFiles
crdl <- cradle
return $ \key ->
fromMaybe key
$ makeRelative (cradleRootDir crdl)
<$> M.lookup key rm
where
mf :: FilePath -> FileMapping -> (FilePath, FilePath)
mf from to = (fmPath to, from)
findFilesWith' :: (FilePath -> IO Bool) -> [FilePath] -> String -> IO [FilePath]
findFilesWith' _ [] _ = return []
findFilesWith' f (d:ds) fileName = do
let file = d </> fileName
exist <- doesFileExist file
b <- if exist then f file else return False
if b then do
files <- findFilesWith' f ds fileName
return $ file : files
else findFilesWith' f ds fileName
makeAbsolute' :: FilePath -> IO FilePath
makeAbsolute' = (normalise <$>) . absolutize
where absolutize path
| isRelative path = (</> path) <$> getCurrentDirectory
| otherwise = return path