Read top-level config to propagate Root to experimental runtime

Signed-off-by: Evan Lezar <elezar@nvidia.com>

cmd/nvidia-container-runtime/modifier/experimental.go

@@ -36,14 +36,13 @@ type experimental struct {
 
 // NewExperimentalModifier creates a modifier that applied the experimental
 // modications to an OCI spec if required by the runtime wrapper.
-func NewExperimentalModifier(logger *logrus.Logger, cfg *config.RuntimeConfig) (oci.SpecModifier, error) {
+func NewExperimentalModifier(logger *logrus.Logger, cfg *config.Config) (oci.SpecModifier, error) {
 	logger.Infof("Constructing modifier from config: %+v", cfg)
 
-	// TODO: We need to specify the root
-	root := ""
+	root := cfg.NVIDIAContainerCLIConfig.Root
 
 	var d discover.Discover
-	switch cfg.DiscoverMode {
+	switch cfg.NVIDIAContainerRuntimeConfig.DiscoverMode {
 	case "legacy":
 		legacyDiscoverer, err := discover.NewLegacyDiscoverer(logger, root)
 		if err != nil {
@@ -51,7 +50,7 @@ func NewExperimentalModifier(logger *logrus.Logger, cfg *config.RuntimeConfig) (
 		}
 		d = legacyDiscoverer
 	default:
-		return nil, fmt.Errorf("invalid discover mode: %v", cfg.DiscoverMode)
+		return nil, fmt.Errorf("invalid discover mode: %v", cfg.NVIDIAContainerRuntimeConfig.DiscoverMode)
 	}
 
 	return newExperimentalModifierFromDiscoverer(logger, d)

cmd/nvidia-container-runtime/modifier/experimental_test.go

@@ -32,25 +32,31 @@ func TestConstructor(t *testing.T) {
 
 	testCases := []struct {
 		description   string
-		cfg           *config.RuntimeConfig
+		cfg           *config.Config
 		expectedError error
 	}{
 		{
-			description:   "empty config raises error",
-			cfg:           &config.RuntimeConfig{},
+			description: "empty config raises error",
+			cfg: &config.Config{
+				NVIDIAContainerRuntimeConfig: config.RuntimeConfig{},
+			},
 			expectedError: fmt.Errorf("invalid discover mode"),
 		},
 		{
 			description: "non-legacy discover mode raises error",
-			cfg: &config.RuntimeConfig{
-				DiscoverMode: "non-legacy",
+			cfg: &config.Config{
+				NVIDIAContainerRuntimeConfig: config.RuntimeConfig{
+					DiscoverMode: "non-legacy",
+				},
 			},
 			expectedError: fmt.Errorf("invalid discover mode"),
 		},
 		{
 			description: "legacy discover mode returns modifier",
-			cfg: &config.RuntimeConfig{
-				DiscoverMode: "legacy",
+			cfg: &config.Config{
+				NVIDIAContainerRuntimeConfig: config.RuntimeConfig{
+					DiscoverMode: "legacy",
+				},
 			},
 		},
 	}