add engine but cdi is commented out

cmd/dcu-ctk/runtime/engine/docker/docker.go

+/**
+# Copyright (c) Advanced Micro Devices, Inc. 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 docker
+
+import (
+	"bytes"
+	"encoding/json"
+	"fmt"
+	"os"
+)
+
+const (
+	runtimesKey        = "runtimes"
+	defaultRuntimeKey  = "default-runtime"
+	featuresKey        = "features"
+  //defaultCDISpecPath = "/etc/cdi"
+)
+
+type dockerConfig map[string]interface{}
+
+func New(path string) (*dockerConfig, error){
+	return loadConfigFile(path)
+}
+
+func loadConfigFile(path string) (*dockerConfig, error) {
+	//check if the file exists
+	f, err := os.Stat(path)
+	if os.IsExist(err) && f.IsDir(){
+		return nil, fmt.Errorf("file path is a directory")
+	}
+
+	config := dockerConfig{}
+
+	if os.IsNotExist(err) {
+		//return empty config
+		return &config, nil
+	}
+
+	fmt.Printf("Loading configuration from: %v\n", path)
+
+	readB, err := os.ReadFile(path)
+
+	if err != nil {
+		return nil, fmt.Errorf("error reading configuration file: %v | err: %v", path, err)
+	}
+
+	reader := bytes.NewReader(readB)
+	err = json.NewDecoder(reader).Decode(&config)
+	if err != nil {
+		return nil, fmt.Errorf("error decoding configuration file: %v | err: %v", path, err)
+	}
+
+	return &config, nil
+}
+
+func (d *dockerConfig) ConfigRuntime(name string, path string, isDefault bool) error {
+	if d == nil {
+		return fmt.Errorf("configuration is empty")
+	}
+
+	currentCfg := *d
+	
+	//check any existing "runtimes"
+	runtimes := map[string]interface{}{}
+	if _, exists := currentCfg[runtimesKey]; exists {
+		runtimes = currentCfg[runtimesKey].(map[string]interface{})
+	}
+
+	runtimes[name] = map[string]interface{}{
+		"path": path,
+		"args": []string{},
+	}
+	currentCfg[runtimesKey] = runtimes
+
+	// Enable CDI by default
+	/*
+	currentCfg[featuresKey] = map[string]interface{}{
+		"cdi": true,
+	}
+	*/
+
+	if isDefault {
+		currentCfg[defaultRuntimeKey] = name
+	}
+    
+	*d = currentCfg
+	return nil
+}
+
+// RemoveRuntime removes the runtime configuration and returns
+// an error and a do not update flag in case daemon.json doesn't need
+// to be updated
+
+func (d *dockerConfig) RemoveRuntime(name string) (error, bool){
+	//_ = os.RemoveAll(defaultCDISpecPath)
+
+	if d == nil {
+		return fmt.Errorf("configuration is empyt"), true
+	}
+
+	updated := false
+	currentCfg := *daemon
+
+	//check any existing "runtimes"
+    if _, exists := currentCfg[runtimesKey]; exists{
+		runtimes := currentCfg[runtimesKey].(map[string]interface{})
+		delete(runtimes, name)
+		delete(currentCfg, featuresKey)
+		_, defExists := currentCfg[defaultRuntimeKey]
+		if defExists {
+			defCfg := currentCfg[defaultRuntimeKey].(string)
+			if defCfg == name {
+				delete(currentCfg, defaultRuntimeKey)
+			}
+		}
+		if len(runtimes) == 0 {
+			delete(currentCfg, runtimesKey)
+		}
+		updated = true
+	}
+		
+	if updated {
+		*d = currentCfg
+		return nil, false
+	}
+	return nil, true
+}
+
+func (d dockerConfig) Update(path string) (int, error) {
+    toWrite, err := json.MarshalIndent(d, "","    ")
+
+	if err != nil{
+		return 0, fmt.Errorf("json marshal failed: %v", err)
+	}
+	if path == "" {
+		num, err := os.Stdout.Write(toWrite)
+		return num, err
+	}
+
+	f, err := os.Create(path)
+	if err != nil {
+		return 0, fmt.Errorf("failed to open file: %v | err: %v", path, err)
+		}
+		defer f.Close()
+		return f.Write(toWrite)
+	}
+}
\ No newline at end of file

cmd/dcu-ctk/runtime/engine/engine.go

+/**
+# Copyright (c) Advanced Micro Devices, Inc. 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 engine
+
+type Interface interface {
+	ConfigRuntime(string, string, bool) error
+	UnsetDefaultRuntime() error
+	Update(string) (int, error)
+	RemoveRuntime(string) (error, bool)
+}
\ No newline at end of file