add 'index du <index>'

cmd/index.go

@@ -41,6 +41,7 @@ func Index(conf *cfg.Config) *cli.Command {
 			IndexClose(conf),
 			IndexFields(conf),
 			IndexIlm(conf),
+			IndexDu(conf),
 
 			// sub commands
 			IndexAlias(conf),
@@ -277,3 +278,24 @@ func IndexIlm(conf *cfg.Config) *cli.Command {
 		},
 	}
 }
+
+func IndexDu(conf *cfg.Config) *cli.Command {
+	return &cli.Command{
+		Name:      "du",
+		Usage:     "show index disk usage",
+		UsageText: "index du <index>",
+
+		ShellComplete: func(ctx context.Context, cmd *cli.Command) {
+			complete(conf, cmd, Cindex)
+		},
+
+		Action: func(ctx context.Context, cmd *cli.Command) error {
+			index := cmd.Args().Get(0)
+			if index == "" {
+				return errors.New("no index specified")
+			}
+
+			return es.IndexDiskusage(conf, index)
+		},
+	}
+}