sync with server on startup

Mentioned in #13 and #36.

client.go

@@ -30,6 +30,12 @@ func client() {
 
 	app.ui.loadFile(app.nav)
 
+	if err := app.nav.sync(); err != nil {
+		msg := fmt.Sprintf("sync: %s", err)
+		app.ui.message = msg
+		log.Printf(msg)
+	}
+
 	if _, err := os.Stat(gConfigPath); err == nil {
 		log.Printf("reading configuration file: %s", gConfigPath)
 

eval.go

@@ -336,16 +336,10 @@ func (e *CallExpr) eval(app *App, args []string) {
 		app.ui.renew()
 		app.nav.renew(app.ui.wins[0].h)
 	case "sync":
-		list, copy, err := loadFiles()
+		if err := app.nav.sync(); err != nil {
-		if err != nil {
 			msg := fmt.Sprintf("sync: %s", err)
 			app.ui.message = msg
 			log.Printf(msg)
-			return
-		}
-		app.nav.saves = make(map[string]bool)
-		for _, f := range list {
-			app.nav.saves[f] = copy
 		}
 	case "echo":
 		app.ui.message = strings.Join(e.args, " ")

nav.go

@@ -461,6 +461,20 @@ func (nav *Nav) put() error {
 	return nil
 }
 
+func (nav *Nav) sync() error {
+	list, copy, err := loadFiles()
+	if err != nil {
+		return err
+	}
+
+	nav.saves = make(map[string]bool)
+	for _, f := range list {
+		nav.saves[f] = copy
+	}
+
+	return nil
+}
+
 func (nav *Nav) currDir() *Dir {
 	return nav.dirs[len(nav.dirs)-1]
 }