[project @ 2005-01-10 23:48:07 by krasimir]

[ghc-hetmet.git] / ghc / lib / compat / Compat / Directory.hs

diff --git a/ghc/lib/compat/Compat/Directory.hs b/ghc/lib/compat/Compat/Directory.hs
index 60f372a..866a09f 100644 (file)
--- a/ghc/lib/compat/Compat/Directory.hs
+++ b/ghc/lib/compat/Compat/Directory.hs
@@ -17,7 +17,8 @@
 module Compat.Directory (
        getAppUserDataDirectory,
        copyFile,
-       findExecutable
+       findExecutable,
+       createDirectoryIfMissing
   ) where
 
 #if __GLASGOW_HASKELL__ < 603
@@ -31,7 +32,7 @@ import System.FilePath
 import System.IO
 import Foreign
 import Foreign.C
-import System.Directory(doesFileExist, getPermissions, setPermissions)
+import System.Directory(doesFileExist, doesDirectoryExist, getPermissions, setPermissions, createDirectory)
 #if defined(__GLASGOW_HASKELL__)
 import GHC.IOBase ( IOException(..) )
 #endif
@@ -109,3 +110,14 @@ findExecutable binary = do
        b <- doesFileExist path
        if b then return (Just path)
              else search ds
+
+createDirectoryIfMissing :: Bool     -- ^ Create its parents too?
+                        -> FilePath -- ^ The path to the directory you want to make
+                        -> IO ()
+createDirectoryIfMissing parents file = do
+  b <- doesDirectoryExist file
+  case (b,parents, file) of 
+    (_,     _, "") -> return ()
+    (True,  _,  _) -> return ()
+    (_,  True,  _) -> mapM_ (createDirectoryIfMissing False) (tail (pathParents file))
+    (_, False,  _) -> createDirectory file