Introduce list service instances command (#58)

internal/cmd/instance/list_instances.go

@@ -0,0 +1,76 @@
+/*
+ * Copyright 2018 The Service Manager Authors
+ *
+ *    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 instance
+
+import (
+	"github.com/Peripli/service-manager-cli/internal/cmd"
+	"github.com/Peripli/service-manager-cli/internal/output"
+	"github.com/spf13/cobra"
+)
+
+// ListInstancesCmd wraps the smctl list-instances command
+type ListInstancesCmd struct {
+	*cmd.Context
+
+	outputFormat output.Format
+}
+
+// NewListInstancesCmd returns new list-instances command with context
+func NewListInstancesCmd(context *cmd.Context) *ListInstancesCmd {
+	return &ListInstancesCmd{Context: context}
+}
+
+// Run runs the command's logic
+func (li *ListInstancesCmd) Run() error {
+	instances, err := li.Client.ListInstances(&li.Parameters)
+	if err != nil {
+		return err
+	}
+
+	output.PrintServiceManagerObject(li.Output, li.outputFormat, instances)
+	output.Println(li.Output)
+
+	return nil
+}
+
+// SetOutputFormat sets output format
+func (li *ListInstancesCmd) SetOutputFormat(format output.Format) {
+	li.outputFormat = format
+}
+
+// HideUsage hides command's usage
+func (li *ListInstancesCmd) HideUsage() bool {
+	return true
+}
+
+// Prepare returns cobra command
+func (li *ListInstancesCmd) Prepare(prepare cmd.PrepareFunc) *cobra.Command {
+	result := &cobra.Command{
+		Use:     "list-instances",
+		Aliases: []string{"li"},
+		Short:   "List service-instances",
+		Long:    `List all service-instances.`,
+		PreRunE: prepare(li, li.Context),
+		RunE:    cmd.RunE(li),
+	}
+
+	cmd.AddFormatFlag(result.Flags())
+	cmd.AddQueryingFlags(result.Flags(), &li.Parameters)
+	cmd.AddCommonQueryFlag(result.Flags(), &li.Parameters)
+
+	return result
+}