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diff --git a/Types/Export.hs b/Types/Export.hs
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+{- git-annex export types
+ -
+ - Copyright 2017 Joey Hess <id@joeyh.name>
+ -
+ - Licensed under the GNU GPL version 3 or higher.
+ -}
+
+module Types.Export where
+
+import qualified System.FilePath.Posix as Posix
+
+-- A location on a remote that a key can be exported to.
+-- The FilePath will be relative to the top of the export,
+-- and may contain unix-style path separators.
+newtype ExportLocation = ExportLocation FilePath
+	deriving (Show, Eq)
+
+newtype ExportDirectory = ExportDirectory FilePath
+	deriving (Show, Eq)
+
+-- | All subdirectories down to the ExportLocation, with the deepest ones
+-- last. Does not include the top of the export.
+exportDirectories :: ExportLocation -> [ExportDirectory]
+exportDirectories (ExportLocation f) =
+	map (ExportDirectory . Posix.joinPath . reverse) (subs [] dirs)
+  where
+	subs _ [] = []
+	subs ps (d:ds) = (d:ps) : subs (d:ps) ds
+
+	dirs = map Posix.dropTrailingPathSeparator $
+		reverse $ drop 1 $ reverse $ Posix.splitPath f