reintroduce serveDirectory (to give some time to users to change their code), but deprecate it

servant-server/src/Servant/Utils/StaticFiles.hs

@@ -11,6 +11,8 @@ module Servant.Utils.StaticFiles
   , serveDirectoryFileServer
   , serveDirectoryEmbedded
   , serveDirectoryWith
+  , -- * Deprecated
+    serveDirectory
   ) where
 
 import           Data.ByteString                (ByteString)
@@ -49,8 +51,6 @@ serveDirectoryWebApp :: FilePath -> Server Raw
 serveDirectoryWebApp = staticApp . defaultWebAppSettings . fixPath
 
 -- | Same as 'serveDirectoryWebApp', but uses `defaultFileServerSettings`.
---
---   This used to be called 'serveDirectory' in @servant < 0.10@.
 serveDirectoryFileServer :: FilePath -> Server Raw
 serveDirectoryFileServer = staticApp . defaultFileServerSettings . fixPath
 
@@ -70,6 +70,13 @@ serveDirectoryEmbedded files = staticApp (embeddedSettings files)
 serveDirectoryWith :: StaticSettings -> Server Raw
 serveDirectoryWith = staticApp
 
+-- | Same as 'serveDirectoryFileServer'. It used to be the only
+--   file serving function in servant pre-0.10 and will be kept
+--   around for a few versions, but is deprecated.
+serveDirectory :: FilePath -> Server Raw
+serveDirectory = serveDirectoryFileServer
+{-# DEPRECATED serveDirectory "Use serveDirectoryFileServer instead" #-}
+
 fixPath :: FilePath -> FilePath
 fixPath =
 #if MIN_VERSION_wai_app_static(3,1,0)