Move FilePathPart from Path.hs to Nar.hs.

This has nothing to do with store paths...

hnix-store-core/src/System/Nix/Nar.hs

@@ -18,6 +18,8 @@ module System.Nix.Nar (
   , localUnpackNar
   , narEffectsIO
   , putNar
+  , FilePathPart(..)
+  , filePathPart
   ) where
 
 import           Control.Applicative
@@ -42,7 +44,6 @@ import           System.FilePath
 import           System.Posix.Files         (createSymbolicLink, fileSize, getFileStatus,
                                              isDirectory, readSymbolicLink)
 
-import           System.Nix.Path
 
 data NarEffects (m :: * -> *) = NarEffects {
     narReadFile   :: FilePath -> m BSL.ByteString
@@ -65,6 +66,17 @@ data NarEffects (m :: * -> *) = NarEffects {
 data Nar = Nar { narFile :: FileSystemObject }
     deriving (Eq, Show)
 
+-- | A valid filename or directory name
+newtype FilePathPart = FilePathPart { unFilePathPart :: BSC.ByteString }
+  deriving (Eq, Ord, Show)
+
+-- | Construct FilePathPart from Text by checking that there
+--   are no '/' or '\\NUL' characters
+filePathPart :: BSC.ByteString -> Maybe FilePathPart
+filePathPart p = case BSC.any (`elem` ['/', '\NUL']) p of
+  False -> Just $ FilePathPart p
+  True  -> Nothing
+
 -- | A FileSystemObject (FSO) is an anonymous entity that can be NAR archived
 data FileSystemObject =
     Regular IsExecutable Int64 BSL.ByteString

hnix-store-core/src/System/Nix/Path.hs

@@ -6,15 +6,13 @@ Maintainer  : Shea Levy <shea@shealevy.com>
 {-# LANGUAGE OverloadedStrings          #-}
 {-# LANGUAGE GeneralizedNewtypeDeriving #-}
 module System.Nix.Path
-  ( FilePathPart(..)
-  , PathHashAlgo
+  ( PathHashAlgo
   , Path(..)
   , pathToText
   , PathSet
   , SubstitutablePathInfo(..)
   , ValidPathInfo(..)
   , PathName(..)
-  , filePathPart
   , pathName
   , Roots
   ) where
@@ -111,17 +109,6 @@ data ValidPathInfo = ValidPathInfo
     ca               :: !Text
   } deriving (Eq, Ord, Show)
 
--- | A valid filename or directory name
-newtype FilePathPart = FilePathPart { unFilePathPart :: BSC.ByteString }
-  deriving (Eq, Ord, Show)
-
--- | Construct FilePathPart from Text by checking that there
---   are no '/' or '\\NUL' characters
-filePathPart :: BSC.ByteString -> Maybe FilePathPart
-filePathPart p = case BSC.any (`elem` ['/', '\NUL']) p of
-  False -> Just $ FilePathPart p
-  True  -> Nothing
-
 type Roots = Map Path Path
 
 instance Hashable Path where