temporary revert "use conversion functions from filepath-bytestring"

This reverts commit 75c40279c1.

Debian unstable is one version too old, so this can be de-reverted in a
bit.

Utility/FileSystemEncoding.hs

@@ -43,7 +43,6 @@ import qualified Data.ByteString.Lazy as L
 import qualified Data.ByteString.UTF8 as S8
 import qualified Data.ByteString.Lazy.UTF8 as L8
 #endif
-import System.FilePath.ByteString (RawFilePath, encodeFilePath, decodeFilePath)
 
 import Utility.Exception
 import Utility.Split
@@ -172,11 +171,21 @@ encodeBL' = L.pack . decodeW8
 encodeBL' = L8.fromString
 #endif
 
-fromRawFilePath :: RawFilePath -> FilePath
-fromRawFilePath = decodeFilePath
+{- Recent versions of the unix package have this alias; defined here
+ - for backwards compatibility. -}
+type RawFilePath = S.ByteString
 
+{- Note that the RawFilePath is assumed to never contain NUL,
+ - since filename's don't. This should only be used with actual
+ - RawFilePaths not arbitrary ByteString that may contain NUL. -}
+fromRawFilePath :: RawFilePath -> FilePath
+fromRawFilePath = decodeBS'
+
+{- Note that the FilePath is assumed to never contain NUL,
+ - since filename's don't. This should only be used with actual FilePaths
+ - not arbitrary String that may contain NUL. -}
 toRawFilePath :: FilePath -> RawFilePath
-toRawFilePath = encodeFilePath
+toRawFilePath = encodeBS'
 
 {- Converts a [Word8] to a FilePath, encoding using the filesystem encoding.
  -

git-annex.cabal

@@ -321,7 +321,7 @@ Executable git-annex
    directory (>= 1.2),
    disk-free-space,
    filepath,
-   filepath-bytestring (>= 1.4.2.1.1),
+   filepath-bytestring,
    IfElse,
    hslogger,
    monad-logger,

stack.yaml

@@ -24,7 +24,7 @@ extra-deps:
 - sandi-0.5
 - http-client-0.5.14
 - silently-1.2.5.1
-- filepath-bytestring-1.4.2.1.1
+- filepath-bytestring-1.4.2.1.0
 explicit-setup-deps:
   git-annex: true
 resolver: lts-13.29