add wait for snapshot (#15)

Signed-off-by: Patrik Cyvoct <[email protected]>

builder/scaleway/step_snapshot.go

@@ -31,6 +31,23 @@ func (s *stepSnapshot) Run(ctx context.Context, state multistep.StateBag) multis
 		return multistep.ActionHalt
 	}
 
+	snapshot, err := instanceAPI.WaitForSnapshot(&instance.WaitForSnapshotRequest{
+		SnapshotID: createSnapshotResp.Snapshot.ID,
+	})
+	if err != nil {
+		err := fmt.Errorf("Snapshot is not available: %s", err)
+		state.Put("error", err)
+		ui.Error(err.Error())
+		return multistep.ActionHalt
+	}
+
+	if snapshot.State != instance.SnapshotStateAvailable {
+		err := fmt.Errorf("Snapshot is in error state")
+		state.Put("error", err)
+		ui.Error(err.Error())
+		return multistep.ActionHalt
+	}
+
 	log.Printf("Snapshot ID: %s", createSnapshotResp.Snapshot.ID)
 	state.Put("snapshot_id", createSnapshotResp.Snapshot.ID)
 	state.Put("snapshot_name", c.SnapshotName)