node: add --only flag to list-nodes

commit-id:4f7d40fc

node/cmd/guardiand/adminnodes.go

@@ -9,6 +9,7 @@ import (
 	"log"
 	"os"
 	"sort"
+	"strings"
 	"text/tabwriter"
 	"time"
 )
@@ -18,10 +19,12 @@ import (
 
 var (
 	showDetails bool
+	only        []string
 )
 
 func init() {
 	AdminClientListNodes.Flags().BoolVar(&showDetails, "showDetails", false, "Show error counter and contract addresses")
+	AdminClientListNodes.Flags().StringSliceVar(&only, "only", nil, "Show only networks with the given name")
 }
 
 var AdminClientListNodes = &cobra.Command{
@@ -104,6 +107,18 @@ func runListNodes(cmd *cobra.Command, args []string) {
 		networks = append(networks, network{"Ropsten", vaa.ChainIDEthereumRopsten})
 	}
 
+	if len(only) > 0 {
+		var filtered []network
+		for _, network := range networks {
+			for _, name := range only {
+				if strings.ToLower(name) == strings.ToLower(network.string) {
+					filtered = append(filtered, network)
+				}
+			}
+		}
+		networks = filtered
+	}
+
 	for _, k := range networks {
 		headers = append(headers, k.string)
 	}