build: make --load use oci exporter with moby containerd store

Signed-off-by: Justin Chadwell <me@jedevc.com>

Author: jedevc

controller/build/build.go

@@ -116,11 +116,23 @@ func RunBuild(ctx context.Context, dockerCli command.Cli, in controllerapi.Build
 		}
 	}
 	if in.ExportLoad {
+		docker := dockerutil.NewClient(dockerCli)
+		features, err := docker.Features(ctx, "")
+		if err != nil {
+			return nil, nil, err
+		}
 		if len(outputs) == 0 {
-			outputs = []client.ExportEntry{{
-				Type:  "docker",
-				Attrs: map[string]string{},
-			}}
+			if features[dockerutil.OCIImporter] {
+				outputs = []client.ExportEntry{{
+					Type:  "oci",
+					Attrs: map[string]string{},
+				}}
+			} else {
+				outputs = []client.ExportEntry{{
+					Type:  "docker",
+					Attrs: map[string]string{},
+				}}
+			}
 		} else {
 			switch outputs[0].Type {
 			case "docker":