Move no arguments check to before opening fsrepo.

License: MIT
Signed-off-by: Yuval Langer <yuval.langer@gmail.com>

core/commands/swarm.go

@@ -461,6 +461,11 @@ add your filters to the ipfs config file.
 			return
 		}
 
+		if len(req.Arguments()) == 0 {
+			res.SetError(errors.New("no filters to add"), cmds.ErrClient)
+			return
+		}
+
 		r, err := fsrepo.Open(req.InvocContext().ConfigRoot)
 		if err != nil {
 			res.SetError(err, cmds.ErrNormal)
@@ -473,11 +478,6 @@ add your filters to the ipfs config file.
 			return
 		}
 
-		if len(req.Arguments()) == 0 {
-			res.SetError(errors.New("no filters to add"), cmds.ErrClient)
-			return
-		}
-
 		for _, arg := range req.Arguments() {
 			mask, err := mafilter.NewMask(arg)
 			if err != nil {