add basic command framework and apiserver

cmd/list.go

@@ -0,0 +1,108 @@
+/*
+Copyright 2016 The GoStor Authors 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 cmd
+
+import (
+	"fmt"
+	"os"
+	"text/tabwriter"
+
+	"github.com/gostor/gotgt/pkg/api"
+	"github.com/gostor/gotgt/pkg/api/client"
+	"github.com/spf13/cobra"
+	"golang.org/x/net/context"
+)
+
+func newListCommand(cli *client.Client) *cobra.Command {
+	var cmd = &cobra.Command{
+		Use:   "list",
+		Short: "List object(s)",
+		Long:  `All software has versions. This is Gotgt 's`,
+		Run: func(cmd *cobra.Command, args []string) {
+			fmt.Println(cmd.UsageString())
+		},
+	}
+	cmd.AddCommand(
+		newListTargetCmd(cli),
+		newListLuCmd(cli),
+	)
+	return cmd
+}
+
+func newListTargetCmd(cli *client.Client) *cobra.Command {
+	opts := api.TargetListOptions{}
+	var cmd = &cobra.Command{
+		Use:   "target",
+		Short: "List target(s) of gotgt",
+		Long:  `All software has versions. This is Gotgt 's`,
+		RunE: func(cmd *cobra.Command, args []string) error {
+			if len(args) > 0 {
+				return fmt.Errorf(
+					"\"%s\" accepts no argument(s).\n",
+					cmd.CommandPath(),
+				)
+			}
+			return listTarget(cli, opts)
+		},
+	}
+	flags := cmd.Flags()
+	flags.StringVar(&opts.Name, "name", "", "Specify target name")
+	flags.BoolVar(&opts.Verbose, "verbose", false, "Show more details")
+
+	return cmd
+
+}
+
+func newListLuCmd(cli *client.Client) *cobra.Command {
+	var cmd = &cobra.Command{
+		Use:   "lu",
+		Short: "List Lu(s) of gotgt",
+		Long:  `All software has versions. This is Gotgt 's`,
+		RunE: func(cmd *cobra.Command, args []string) error {
+			if err := NoArgs(cmd, args); err != nil {
+				return err
+			}
+			return listLu(cli)
+		},
+	}
+	flags := cmd.Flags()
+	_ = flags
+	return cmd
+}
+
+func listTarget(cli *client.Client, opts api.TargetListOptions) error {
+	results, err := cli.TargetList(context.Background(), opts)
+	if err != nil {
+		return err
+	}
+
+	w := tabwriter.NewWriter(os.Stdout, 20, 1, 3, ' ', 0)
+	fmt.Fprintln(w, "TARGET NAME\tSTATE\tSESSIONS")
+	for _, tgt := range results {
+		status := "online"
+		if tgt.State == api.TargetReady {
+			status = "ready"
+		}
+		fmt.Fprintf(w, "%s\t%s\t%d\n", tgt.Name, status, len(tgt.ITNexus))
+	}
+	w.Flush()
+	return nil
+}
+
+func listLu(cli *client.Client) error {
+	return nil
+}