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-rw-r--r--Git/Ref.hs5
1 files changed, 5 insertions, 0 deletions
diff --git a/Git/Ref.hs b/Git/Ref.hs
index 09472930f..88717ce47 100644
--- a/Git/Ref.hs
+++ b/Git/Ref.hs
@@ -11,6 +11,7 @@ import Common
import Git
import Git.Command
import Git.Sha
+import Git.Types
import Data.Char (chr)
@@ -51,6 +52,10 @@ underBase dir r = Ref $ dir ++ "/" ++ show (base r)
fileRef :: FilePath -> Ref
fileRef f = Ref $ ":./" ++ f
+{- Converts a Ref to refer to the content of the Ref on a given date. -}
+dateRef :: Ref -> RefDate -> Ref
+dateRef (Ref r) (RefDate d) = Ref $ r ++ "@" ++ d
+
{- A Ref that can be used to refer to a file in the repository as it
- appears in a given Ref. -}
fileFromRef :: Ref -> FilePath -> Ref