finish git-annex enable-tor

Make it stash the address away for git-annex p2p to use later, rather
than outputting it. And, look up the UUID itself.

Command/EnableTor.hs

@@ -8,27 +8,28 @@
 module Command.EnableTor where
 
 import Command
+import P2P.Address
 import Utility.Tor
+import Annex.UUID
 
 -- This runs as root, so avoid making any commits or initializing
--- git-annex, as that would create root-owned files.
+-- git-annex, or doing other things that create root-owned files.
 cmd :: Command
 cmd = noCommit $ dontCheck repoExists $
-	command "enable-tor" SectionSetup ""
-		"userid uuid" (withParams seek)
+	command "enable-tor" SectionSetup "enable tor hidden service"
+		"uid" (withParams seek)
 
 seek :: CmdParams -> CommandSeek
 seek = withWords start
 
-start :: CmdParams -> CommandStart
-start (suserid:uuid:[]) = case readish suserid of
-	Nothing -> error "Bad userid"
+start :: [String] -> CommandStart
+start ps = case readish =<< headMaybe ps of
+	Nothing -> giveup "Bad params"
 	Just userid -> do
-		(OnionAddress onionaddr, onionport) <- liftIO $
-			addHiddenService userid uuid
-		liftIO $ putStrLn $ 
-			"tor-annex::" ++
-			onionaddr ++ ":" ++ 
-			show onionport ++ " "
+		uuid <- getUUID
+		when (uuid == NoUUID) $
+			giveup "This can only be run in a git-annex repository."
+		(onionaddr, onionport) <- liftIO $
+			addHiddenService userid (fromUUID uuid)
+		storeP2PAddress $ TorAnnex onionaddr onionport
 		stop
-start _ = error "Bad params"