git annex drop -- do not try to drop if key is not in backend

Commands.hs

@@ -165,13 +165,20 @@ getCmd file = notinBackend file err $ \(key, backend) -> do
  - if it's safe to do so. -}
 dropCmd :: FilePath -> Annex ()
 dropCmd file = notinBackend file err $ \(key, backend) -> do
+	inbackend <- Backend.hasKey key
+	if (not inbackend)
+		then return () -- no-op
+		else do
 			force <- Annex.flagIsSet Force
 			if (not force)
 				then requireEnoughCopies key
 				else return ()
 			success <- Backend.removeKey backend key
 			if (success)
-		then do
+				then cleanup key
+				else error $ "backend refused to drop " ++ file
+	where
+		cleanup key = do
 			logStatus key ValueMissing
 			inannex <- inAnnex key
 			if (inannex)
@@ -181,8 +188,6 @@ dropCmd file = notinBackend file err $ \(key, backend) -> do
 					liftIO $ removeFile loc
 					return ()
 				else return ()
-		else error $ "backend refused to drop " ++ file
-	where
 		err = error $ "not annexed " ++ file
 
 {- Fixes the symlink to an annexed file. -}

TODO

@@ -1,7 +1,11 @@
 * bug: cannot "git annex ../foo"   (GitRepo.relative is buggy and
   git-ls-files also refuses w/o --full-name, which would need other changes)
 
-* --push/--pull/--want
+* bug: git annex add file  is silent if file was a symlink and got replaced
+  with a file. The you then git command -a, you'll check in the fil contents..
+
+* --push/--pull should take a reponame and files, and push those files
+  to that repo; dropping them from the current repo
 
 * how to handle git mv file? -> git annex fix -> run automatically?