on second thought, InodeCache should use getFileSize

This is necessary for interop between inode caches created on unix and
windows. Which is more important than supporting inodecaches for large keys
with the wrong size, which are broken anyway.

There should be no slowdown from this change, except on Windows.

Utility/InodeCache.hs

@@ -40,15 +40,12 @@ module Utility.InodeCache (
 import Common
 import System.PosixCompat.Types
 import Utility.QuickCheck
--- While fileSize overflows and wraps at 2gb on Windows,
--- it's ok for purposes of comparison.
-import System.PosixCompat.Files (fileSize)
 
 #ifdef mingw32_HOST_OS
 import Data.Word (Word64)
 #endif
 
-data InodeCachePrim = InodeCachePrim FileID FileOffset EpochTime
+data InodeCachePrim = InodeCachePrim FileID Integer EpochTime
 	deriving (Show, Eq, Ord)
 
 newtype InodeCache = InodeCache InodeCachePrim
@@ -115,15 +112,16 @@ readInodeCache s = case words s of
 
 genInodeCache :: FilePath -> TSDelta -> IO (Maybe InodeCache)
 genInodeCache f delta = catchDefaultIO Nothing $
-	toInodeCache delta =<< getFileStatus f
+	toInodeCache delta f =<< getFileStatus f
 
-toInodeCache :: TSDelta -> FileStatus -> IO (Maybe InodeCache)
-toInodeCache (TSDelta getdelta) s
+toInodeCache :: TSDelta -> FilePath -> FileStatus -> IO (Maybe InodeCache)
+toInodeCache (TSDelta getdelta) f s
 	| isRegularFile s = do
 		delta <- getdelta
+		sz <- getFileSize' f s
 		return $ Just $ InodeCache $ InodeCachePrim
 			(fileID s)
-			(fileSize s)
+			sz
 			(modificationTime s + delta)
 	| otherwise = pure Nothing