Restore compatibility with newer version of base16-bytestring.
Taken from https://raw.githubusercontent.com/archlinux/svntogit-community/packages/trunk/cabal-install-base16-bytestring1.0.patch
diff --git a/Distribution/Client/HashValue.hs b/Distribution/Client/HashValue.hs
index 54b8aee9e..11e647c1c 100644
--- a/Distribution/Client/HashValue.hs
+++ b/Distribution/Client/HashValue.hs
@@ -1,3 +1,4 @@
+{-# LANGUAGE CPP #-}
{-# LANGUAGE DeriveDataTypeable #-}
{-# LANGUAGE DeriveGeneric #-}
module Distribution.Client.HashValue (
@@ -72,10 +73,14 @@ hashFromTUF (Sec.Hash hashstr) =
--TODO: [code cleanup] either we should get TUF to use raw bytestrings or
-- perhaps we should also just use a base16 string as the internal rep.
case Base16.decode (BS.pack hashstr) of
+#if MIN_VERSION_base16_bytestring(1,0,0)
+ Right hash -> HashValue hash
+ Left _ -> error "hashFromTUF: cannot decode base16"
+#else
(hash, trailing) | not (BS.null hash) && BS.null trailing
-> HashValue hash
_ -> error "hashFromTUF: cannot decode base16 hash"
-
+#endif
-- | Truncate a 32 byte SHA256 hash to
--
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