When a http remote does not expose an annex.uuid config, only warn about it once, not every time git-annex is run.

Same behavior as for a ssh remote.

CHANGELOG

@@ -1,8 +1,9 @@
 git-annex (6.20170322) UNRELEASED; urgency=medium
 
-  * stack.yaml: Update to lts-8.6.
+  * When a http remote does not expose an annex.uuid config, only warn
+    about it once, not every time git-annex is run.
 
- -- Joey Hess <id@joeyh.name>  Mon, 27 Mar 2017 19:48:31 -0400
+ -- Joey Hess <id@joeyh.name>  Wed, 29 Mar 2017 12:41:46 -0400
 
 git-annex (6.20170321) unstable; urgency=medium
 

Remote/Git.hs

@@ -248,18 +248,15 @@ tryGitConfigRead autoinit r
 				, return Nothing
 				)
 		case v of
-			Nothing -> do
-				warning $ "Failed to get annex.uuid configuration of repository " ++ Git.repoDescribe r
-				return r
-			Just (Left _) -> do
-				set_ignore "not usable by git-annex" False
-				return r
 			Just (Right r') -> do
 				-- Cache when http remote is not bare for
 				-- optimisation.
 				unless (Git.Config.isBare r') $
 					setremote setRemoteBare False
 				return r'
+			_ -> do
+				set_ignore "not usable by git-annex" False
+				return r
 
 	store = observe $ \r' -> do
 		g <- gitRepo

doc/bugs/http_git_remote_uuid_discovery_repeated.mdwn

@@ -1,3 +1,5 @@
 When cloning eg <https://github.com/datalad/ds000114>, each time git-annex
 is run, it tries to get the uuid, fails, prints a warning. It should set
 annex-ignore instead, so that only happens once. --[[Joey]]
+
+> [[fixed|done]] --[[Joey]]