feat: added error to GetContextEndpoint

this ill make the progam not fail if there is a non-docker swarm context

cli/server.go

@@ -26,10 +26,16 @@ var serverListCommand = &cli.Command{
 
 		serverNames := config.ReadServerNames()
 		for _, serverName := range serverNames {
+
 			var row []string
 			for _, ctx := range contexts {
+				endpoint, err := client.GetContextEndpoint(ctx)
+				if err != nil {
+					// This most likely means its a non-docker swarm context and we can ignore
+					continue
+				}
 				if ctx.Name == serverName {
-					row = []string{serverName, client.GetContextEndpoint(ctx)}
+					row = []string{serverName, endpoint}
 				}
 			}
 			if len(row) == 0 {

client/client.go

@@ -1,6 +1,7 @@
 package client
 
 import (
+	"errors"
 	"fmt"
 	"net/http"
 	"os"
@@ -49,10 +50,14 @@ func NewClientWithContext(contextURL string) *dClient.Client {
 	return cl
 }
 
-func GetContextEndpoint(ctx dCliContextStore.Metadata) string {
+func GetContextEndpoint(ctx dCliContextStore.Metadata) (string, error) {
 	// safe to use docker key hardcoded since abra doesn't use k8s... yet...
-	endpointmeta := ctx.Endpoints["docker"].(dContext.EndpointMetaBase)
-	return endpointmeta.Host
+	endpointmeta, ok := ctx.Endpoints["docker"].(dContext.EndpointMetaBase)
+	if !ok {
+		err := errors.New("context lacks Docker endpoint")
+		return "", err
+	}
+	return endpointmeta.Host, nil
 }
 
 func NewDefaultDockerContextStore() *dCliCommand.ContextStoreWithDefault {