Updated error handling in the example command tool.

cmd/triplex-example/main.go

@@ -8,6 +8,7 @@ import (
 	"errors"
 	"flag"
 	"fmt"
+	"os"
 
 	"git.hoiting.org/micha/triplex/serial"
 )
@@ -37,12 +38,12 @@ func main() {
 		full, idx, err := serial.CompleteCode(*complete)
 		if err != nil {
 			fmt.Println("complete error:", err)
-			return
+			os.Exit(1)
 		}
 
 		fmt.Println("code:", full)
 		fmt.Println("idx:", idx)
-		return
+		os.Exit(0)
 	}
 
 	opts := serial.RandomCodeOptions{
@@ -59,14 +60,14 @@ func main() {
 	if err != nil {
 		if errors.Is(err, serial.ErrRandomSourceFailed) {
 			fmt.Println("random source failed")
-			return
+			os.Exit(1)
 		}
 		if errors.Is(err, serial.ErrNoAvailableIndex) {
 			fmt.Println("no available index found")
-			return
+			os.Exit(1)
 		}
 		fmt.Println("unexpected error:", err)
-		return
+		os.Exit(1)
 	}
 
 	fmt.Println("code:", code)