ignore gcrypt remotes w/o an annex-uuid

Config.hs

@@ -25,6 +25,9 @@ instance Show ConfigKey where
 getConfig :: ConfigKey -> String -> Annex String
 getConfig (ConfigKey key) def = fromRepo $ Git.Config.get key def
 
+getConfigMaybe :: ConfigKey -> Annex (Maybe String)
+getConfigMaybe (ConfigKey key) = fromRepo $ Git.Config.getMaybe key
+
 {- Changes a git config setting in both internal state and .git/config -}
 setConfig :: ConfigKey -> String -> Annex ()
 setConfig (ConfigKey key) value = do

Remote/GCrypt.hs

@@ -25,6 +25,7 @@ import Config
 import Config.Cost
 import Remote.Helper.Git
 import Remote.Helper.Encryptable
+import Remote.Helper.Special
 import Utility.Metered
 import Crypto
 import Annex.UUID
@@ -145,7 +146,9 @@ gCryptSetup mu c = go $ M.lookup "gitrepo" c
 			Just v -> do
 				let u = genUUIDInNameSpace gCryptNameSpace v
 				if Just u == mu || mu == Nothing
-					then return (c', u)
+					then do
+						gitConfigSpecialRemote u c' "gcrypt" "true"
+						return (c', u)
 					else error "uuid mismatch"
 
 store :: Remote -> Remote.Rsync.RsyncOpts -> (Cipher, Key) -> Key -> MeterUpdate -> Annex Bool

Remote/Git.hs

@@ -144,13 +144,7 @@ tryGitConfigRead r
 	| Git.repoIsHttp r = do
 		headers <- getHttpHeaders
 		store $ geturlconfig headers
-	| Git.GCrypt.isEncrypted r = do
-		-- Generate a UUID from the gcrypt-id
-		g <- gitRepo
-		case Git.GCrypt.remoteRepoId g (Git.remoteName r) of
-			Nothing -> return r
-			Just v -> store $ liftIO $ setUUID r $
-				genUUIDInNameSpace gCryptNameSpace v
+	| Git.GCrypt.isEncrypted r = handlegcrypt =<< getConfigMaybe (remoteConfig r "uuid")
 	| Git.repoIsUrl r = return r
 	| otherwise = store $ safely $ onLocal r $ do 
 		ensureInitialized
@@ -218,6 +212,15 @@ tryGitConfigRead r
 			let k = "remote." ++ n ++ ".annex-ignore"
 			warning $ "Remote " ++ n ++ " " ++ msg ++ "; setting " ++ k
 			inRepo $ Git.Command.run [Param "config", Param k, Param "true"]
+		
+	handlegcrypt Nothing = return r
+	handlegcrypt (Just _cacheduuid) = do
+		-- Generate UUID from the gcrypt-id
+		g <- gitRepo
+		case Git.GCrypt.remoteRepoId g (Git.remoteName r) of
+			Nothing -> return r
+			Just v -> store $ liftIO $ setUUID r $
+				genUUIDInNameSpace gCryptNameSpace v
 
 {- Checks if a given remote has the content for a key inAnnex.
  - If the remote cannot be accessed, or if it cannot determine