Add merged CDI spec transformer

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

pkg/nvcdi/transform/merge.go

@@ -0,0 +1,36 @@
+/**
+# Copyright (c) NVIDIA CORPORATION.  All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+**/
+
+package transform
+
+import "github.com/container-orchestrated-devices/container-device-interface/specs-go"
+
+type merged []Transformer
+
+// Merge creates a merged transofrmer from the specified transformers.
+func Merge(transformers ...Transformer) Transformer {
+	return merged(transformers)
+}
+
+// Transform applies all the transformers in the merged set.
+func (t merged) Transform(spec *specs.Spec) error {
+	for _, transformer := range t {
+		if err := transformer.Transform(spec); err != nil {
+			return err
+		}
+	}
+	return nil
+}