fix cloning from an annex:: remote with exporttree=yes

Updating the remote list needs the config to be written to the git-annex
branch, which was not done for good reasons. While it would be possible
to instead use Remote.List.remoteGen without writing to the branch, I
already have a plan to discard git-annex branch writes made by
git-remote-annex, so the simplest fix is to write the config to the
branch.

Sponsored-by: k0ld on Patreon

CmdLine/GitRemoteAnnex.hs

@@ -22,6 +22,7 @@ import qualified Git.Remote.Remove
 import qualified Annex.SpecialRemote as SpecialRemote
 import qualified Annex.Branch
 import qualified Types.Remote as Remote
+import qualified Logs.Remote
 import Annex.Transfer
 import Backend.GitRemoteAnnex
 import Config
@@ -481,20 +482,15 @@ withSpecialRemote cfg@(SpecialRemoteConfig {}) sab a = case specialRemoteName cf
   where
 	-- Initialize a new special remote with the provided configuration
 	-- and name.
-	--
-	-- The configuration is not stored in the git-annex branch, because
-	-- it's expected that the git repository stored on the special
-	-- remote includes its configuration, perhaps under a different
-	-- name, and perhaps slightly different (when the annex:: url
-	-- omitted some unimportant part of the configuration).
 	initremote remotename = do
 		let c = M.insert SpecialRemote.nameField (Proposed remotename)
 			(specialRemoteConfig cfg)
 		t <- either giveup return (SpecialRemote.findType c)
 		dummycfg <- liftIO dummyRemoteGitConfig
-		(c', _u) <- Remote.setup t Remote.Init (Just (specialRemoteUUID cfg)) 
+		(c', u) <- Remote.setup t Remote.Init (Just (specialRemoteUUID cfg)) 
 			Nothing c dummycfg
 			`onException` cleanupremote remotename
+		Logs.Remote.configSet u c'
 		setConfig (remoteConfig c' "url") (specialRemoteUrl cfg)
 		remotesChanged
 		getEnabledSpecialRemoteByName remotename >>= \case

doc/todo/git-remote-annex.mdwn

@@ -14,9 +14,6 @@ This is implememented and working. Remaining todo list for it:
 
 * Test incremental pushes that don't fast-forward.
 
-* exporttree=yes remote works, but cloning one from the annex:: url
-  does not, somehow exportTree is not set then.
-
 * Support max-bundles config
 
 * Need to mention git-remote-annex in special remotes page, and perhaps
@@ -91,6 +88,12 @@ This is implememented and working. Remaining todo list for it:
   This should be fixable by making git-remote-annex not write to the
   git-annex branch, but to eg, a temporary journal directory.
 
+  Also, cloning currently writes the special remote config into remote.log,
+  which might be slightly different in some way than the config in
+  remote.log for the same remote. cloning should not change the stored
+  config of a remote, but that branch write was necessary. So throwing
+  away the branch write is also good for this case.
+
   Also, when the remote uses importree=yes, pushing to it updates
   content identifiers, which currently get recorded in the git-annex
   branch. It would be good to avoid that being written as well.