Import of https://github.com/ciena/voltctl at commit 40d61fbf3f910ed4017cf67c9c79e8e1f82a33a5

Change-Id: I8464c59e60d76cb8612891db3303878975b5416c
diff --git a/internal/pkg/commands/adapter.go b/internal/pkg/commands/adapter.go
new file mode 100644
index 0000000..5b372a1
--- /dev/null
+++ b/internal/pkg/commands/adapter.go
@@ -0,0 +1,104 @@
+/*
+ * Copyright 2019-present Ciena Corporation
+ *
+ * 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 commands
+
+import (
+	"context"
+	"github.com/ciena/voltctl/pkg/format"
+	"github.com/ciena/voltctl/pkg/model"
+	"github.com/fullstorydev/grpcurl"
+	flags "github.com/jessevdk/go-flags"
+	"github.com/jhump/protoreflect/dynamic"
+)
+
+const (
+	DEFAULT_OUTPUT_FORMAT = "table{{ .Id }}\t{{.Vendor}}\t{{.Version}}"
+)
+
+type AdapterList struct {
+	ListOutputOptions
+}
+
+type AdapterOpts struct {
+	List AdapterList `command:"list"`
+}
+
+var adapterOpts = AdapterOpts{}
+
+func RegisterAdapterCommands(parent *flags.Parser) {
+	parent.AddCommand("adapter", "adapter commands", "Commands to query and manipulate VOLTHA adapters", &adapterOpts)
+}
+
+func (options *AdapterList) Execute(args []string) error {
+	conn, err := NewConnection()
+	if err != nil {
+		return err
+	}
+	defer conn.Close()
+
+	descriptor, method, err := GetMethod("adapter-list")
+	if err != nil {
+		return err
+	}
+
+	ctx, cancel := context.WithTimeout(context.Background(), GlobalConfig.Grpc.Timeout)
+	defer cancel()
+
+	h := &RpcEventHandler{}
+	err = grpcurl.InvokeRPC(ctx, descriptor, conn, method, []string{}, h, h.GetParams)
+	if err != nil {
+		return err
+	}
+
+	if h.Status != nil && h.Status.Err() != nil {
+		return h.Status.Err()
+	}
+
+	d, err := dynamic.AsDynamicMessage(h.Response)
+	if err != nil {
+		return err
+	}
+	items, err := d.TryGetFieldByName("items")
+	if err != nil {
+		return err
+	}
+
+	outputFormat := CharReplacer.Replace(options.Format)
+	if outputFormat == "" {
+		outputFormat = DEFAULT_OUTPUT_FORMAT
+	}
+
+	if options.Quiet {
+		outputFormat = "{{.Id}}"
+	}
+
+	data := make([]model.Adapter, len(items.([]interface{})))
+	for i, item := range items.([]interface{}) {
+		data[i].PopulateFrom(item.(*dynamic.Message))
+	}
+
+	result := CommandResult{
+		Format:    format.Format(outputFormat),
+		Filter:    options.Filter,
+		OrderBy:   options.OrderBy,
+		OutputAs:  toOutputType(options.OutputAs),
+		NameLimit: options.NameLimit,
+		Data:      data,
+	}
+	GenerateOutput(&result)
+
+	return nil
+}