improve feedback when no rolls are given

mgumz · Sep 25, 2016 · 3eb9e97 · 3eb9e97
1 parent 349d5c4
commit 3eb9e97
Showing 1 changed file with 5 additions and 0 deletions.
diff --git a/main.go b/main.go
@@ -73,6 +73,11 @@ func main() {
 		return
 	}
 
+	if len(flag.Args()) == 0 {
+		fmt.Println("no rolls given, no lookup possible.\n")
+		flag.Usage()
+		return
+	}
 	doLookupRolls(flag.Args(), lines, printer)
 }