git-annex-shell gcryptsetup command

This was the least-bad alternative to get dedicated key gcrypt repos
working in the assistant.

Command/GCryptSetup.hs

@@ -0,0 +1,35 @@
+{- git-annex command
+ -
+ - Copyright 2013 Joey Hess <joey@kitenet.net>
+ -
+ - Licensed under the GNU GPL version 3 or higher.
+ -}
+
+module Command.GCryptSetup where
+
+import Common.Annex
+import Command
+import Annex.UUID
+import qualified Remote.GCrypt
+import qualified Git
+
+def :: [Command]
+def = [dontCheck repoExists $ noCommit $
+	command "gcryptsetup" paramValue seek
+		SectionPlumbing "sets up gcrypt repository"]
+
+seek :: [CommandSeek]
+seek = [withStrings start]
+
+start :: String -> CommandStart
+start gcryptid = next $ next $ do
+	g <- gitRepo
+	u <- getUUID
+	gu <- Remote.GCrypt.getGCryptUUID True g
+	if u == NoUUID && gu == Nothing
+		then if Git.repoIsLocalBare g
+			then do
+				void $ Remote.GCrypt.setupRepo gcryptid g
+				return True
+			else error "cannot use gcrypt in a non-bare repository"
+		else error "gcryptsetup permission denied"