fixes deprovision panic and recurring deployment doesn't exist error (#95)

Signed-off-by: Ashraf Fouda <ashraf.m.fouda@gmail.com>

Author: ashraffouda

pkg/primitives/vm-light/vm.go

@@ -308,10 +308,12 @@ func (p *Manager) Deprovision(ctx context.Context, wl *gridtypes.WorkloadWithID)
 		log.Error().Err(err).Str("name", volName).Msg("failed to delete rootfs volume")
 	}
 
-	tapName := wl.ID.Unique(string(cfg.Network.Mycelium.Network))
+	if cfg.Network.Mycelium != nil {
+		tapName := wl.ID.Unique(string(cfg.Network.Mycelium.Network))
 
-	if err := network.Detach(ctx, tapName); err != nil {
-		return errors.Wrap(err, "could not clean up tap device")
+		if err := network.Detach(ctx, tapName); err != nil {
+			return errors.Wrap(err, "could not clean up tap device")
+		}
 	}
 
 	return nil

pkg/provision/engine.go

@@ -680,7 +680,8 @@ func (e *NativeEngine) uninstallWorkload(ctx context.Context, wl *gridtypes.Work
 		Logger()
 
 	_, err := e.storage.Current(twin, deployment, name)
-	if errors.Is(err, ErrWorkloadNotExist) {
+	if errors.Is(err, ErrWorkloadNotExist) || errors.Is(err, ErrDeploymentNotExists) {
+		// workload or deployment doesn't exist in storage, consider it already deleted
 		return nil
 	} else if err != nil {
 		return err