Auto-install qemu-guest-agent package during image customization

customize.go

@@ -28,6 +28,12 @@ func customizeImage(config *Config) error {
 		}
 	}
 
+	if config.GuestAgent {
+		if err := installGuestAgent(imagePath); err != nil {
+			return err
+		}
+	}
+
 	fmt.Println("Verifying customized image...")
 	if err := verifyImage(imagePath); err != nil {
 		return fmt.Errorf("customized image verification failed: %w", err)
@@ -93,3 +99,22 @@ func injectSSHKey(imagePath, sshKeyPath string) error {
 
 	return nil
 }
+
+func installGuestAgent(imagePath string) error {
+	fmt.Println("Installing QEMU Guest Agent...")
+
+	cmd := exec.Command("virt-customize",
+		"-a", imagePath,
+		"--install", "qemu-guest-agent",
+		"--run-command", "systemctl enable qemu-guest-agent",
+	)
+	cmd.Stdout = os.Stdout
+	cmd.Stderr = os.Stderr
+
+	if err := cmd.Run(); err != nil {
+		return fmt.Errorf("failed to install qemu-guest-agent: %w", err)
+	}
+
+	fmt.Println("QEMU Guest Agent installed and enabled!")
+	return nil
+}