add index fields filter flags (#27)

cmd/index.go

@@ -260,6 +260,27 @@ func IndexFields(conf *cfg.Config) *cli.Command {
 		Usage:     "show info about field capabilities",
 		UsageText: "index fields <index>",
 
+		Flags: []cli.Flag{
+			&cli.BoolFlag{
+				Name:        "aggretable",
+				Usage:       "include only aggretable fields",
+				Destination: &conf.Aggretable,
+				Aliases:     []string{"a"},
+			},
+			&cli.BoolFlag{
+				Name:        "searchable",
+				Usage:       "include only searchable fields",
+				Destination: &conf.Searchable,
+				Aliases:     []string{"s"},
+			},
+			&cli.StringSliceFlag{
+				Name:        "type",
+				Usage:       "show only fields of this type",
+				Destination: &conf.Filter,
+				Aliases:     []string{"t"},
+			},
+		},
+
 		Action: func(ctx context.Context, cmd *cli.Command) error {
 			index := cmd.Args().Get(0)
 			if index == "" {