got configure working after Utility.Path ByteString conversion

Had to split out some modules because getWorkingDirectory needs unix,
which is not a build-dep of configure.

This commit was sponsored by Brock Spratlen on Patreon.

Utility/Directory.hs

@@ -18,7 +18,6 @@ import Control.Monad
 import System.FilePath
 import System.PosixCompat.Files
 import Control.Applicative
-import Control.Monad.IO.Class
 import Control.Monad.IfElse
 import System.IO.Unsafe (unsafeInterleaveIO)
 import System.IO.Error
@@ -30,12 +29,10 @@ import Utility.SafeCommand
 #endif
 
 import Utility.SystemDirectory
-import Utility.Path
 import Utility.Tmp
 import Utility.Exception
 import Utility.Monad
 import Utility.Applicative
-import Utility.PartialPrelude
 
 dirCruft :: FilePath -> Bool
 dirCruft "." = True
@@ -157,74 +154,3 @@ nukeFile file = void $ tryWhenExists go
 #else
 	go = removeFile file
 #endif
-
-{- Like createDirectoryIfMissing True, but it will only create
- - missing parent directories up to but not including the directory
- - in the first parameter.
- -
- - For example, createDirectoryUnder "/tmp/foo" "/tmp/foo/bar/baz"
- - will create /tmp/foo/bar if necessary, but if /tmp/foo does not exist,
- - it will throw an exception.
- -
- - The exception thrown is the same that createDirectory throws if the
- - parent directory does not exist.
- -
- - If the second FilePath is not under the first
- - FilePath (or the same as it), it will fail with an exception
- - even if the second FilePath's parent directory already exists.
- -
- - Either or both of the FilePaths can be relative, or absolute.
- - They will be normalized as necessary.
- -
- - Note that, the second FilePath, if relative, is relative to the current
- - working directory, not to the first FilePath.
- -}
-createDirectoryUnder :: FilePath -> FilePath -> IO ()
-createDirectoryUnder topdir dir =
-	createDirectoryUnder' topdir dir createDirectory
-
-createDirectoryUnder'
-	:: (MonadIO m, MonadCatch m)
-	=> FilePath
-	-> FilePath
-	-> (FilePath -> m ())
-	-> m ()
-createDirectoryUnder' topdir dir0 mkdir = do
-	p <- liftIO $ relPathDirToFile topdir dir0
-	let dirs = splitDirectories p
-	-- Catch cases where the dir is not beneath the topdir.
-	-- If the relative path between them starts with "..",
-	-- it's not. And on Windows, if they are on different drives,
-	-- the path will not be relative.
-	if headMaybe dirs == Just ".." || isAbsolute p
-		then liftIO $ ioError $ customerror userErrorType
-			("createDirectoryFrom: not located in " ++ topdir)
-		-- If dir0 is the same as the topdir, don't try to create
-		-- it, but make sure it does exist.
-		else if null dirs
-			then liftIO $ unlessM (doesDirectoryExist topdir) $
-				ioError $ customerror doesNotExistErrorType
-					"createDirectoryFrom: does not exist"
-			else createdirs $
-				map (topdir </>) (reverse (scanl1 (</>) dirs))
-  where
-	customerror t s = mkIOError t s Nothing (Just dir0)
-
-	createdirs [] = pure ()
-	createdirs (dir:[]) = createdir dir (liftIO . ioError)
-	createdirs (dir:dirs) = createdir dir $ \_ -> do
-		createdirs dirs
-		createdir dir (liftIO . ioError)
-
-	-- This is the same method used by createDirectoryIfMissing,
-	-- in particular the handling of errors that occur when the
-	-- directory already exists. See its source for explanation
-	-- of several subtleties.
-	createdir dir notexisthandler = tryIO (mkdir dir) >>= \case
-		Right () -> pure ()
-		Left e
-			| isDoesNotExistError e -> notexisthandler e
-			| isAlreadyExistsError e || isPermissionError e ->
-				liftIO $ unlessM (doesDirectoryExist dir) $
-					ioError e
-			| otherwise -> liftIO $ ioError e