fix: restore sessions after 9P listener is ready

ConsumeFeed dials the 9P socket. Moving session restore to after
the listener starts ensures the socket exists when feed consumers
connect.

cmd/olliesrv/internal/fs/newroot.go

@@ -41,7 +41,12 @@ func NewRoot(cfg Config) *Tree {
 	helpSpec = &spec
 	tree := virtfs.BuildTree(spec)
 
-	// Restore persisted sessions from disk.
+	return tree
+}
+
+// RestoreSessions restores persisted sessions from disk.
+// Must be called after the 9P listener is ready.
+func RestoreSessions() {
 	for _, r := range session.RestoreAllSessions() {
 		for _, ra := range r.Agents {
 			if ag := r.Session.FindAgent(ra.ID); ag != nil {
@@ -50,6 +55,4 @@ func NewRoot(cfg Config) *Tree {
 			}
 		}
 	}
-
-	return tree
 }

cmd/olliesrv/main.go

@@ -108,6 +108,9 @@ func runServer(sockPath string) {
 
 	fmt.Printf("olliesrv listening on %s\n", sockPath)
 
+	// Restore sessions now that the 9P listener is ready.
+	fs.RestoreSessions()
+
 	var tcpListener net.Listener
 	if *tcpAddr != "" {
 		tcpListener, err = net.Listen("tcp", *tcpAddr)