fleetctl: take experimentalAPI into account in getClient

getClient() has not taken into account the case of !experimentalAPI,
before calling registryClient. It has set endPoint to a specific value
of URLs, but the new value would not be passed to getRegistryClient(),
which simply fetches endPoint again. This was a regression since
848d356 ("fleetctl: convert cli to cobra").

To fix that, introduce getEndpoint() that does GetString("endpoint")
as well as the special handling for experimentalAPI. And make
getRegistryClient() call getEndpoint().

Fortunately, the experimentalAPI flag is set to true by default, so
this special handling path is not actively used after all. Just for
correctness.

fleetctl/fleetctl.go

@@ -319,20 +319,7 @@ func getClientAPI(cCmd *cobra.Command) client.API {
 
 // getClient initializes a client of fleet based on CLI flags
 func getClient(cCmd *cobra.Command) (client.API, error) {
-	// The user explicitly set --experimental-api=false, so it trumps the
-	// --driver flag. This behavior exists for backwards-compatibilty.
-	experimentalAPI, _ := cmdFleet.PersistentFlags().GetBool("experimental-api")
-	endPoint, _ := cmdFleet.PersistentFlags().GetString("endpoint")
 	clientDriver, _ := cmdFleet.PersistentFlags().GetString("driver")
-	if !experimentalAPI {
-		// Additionally, if the user set --experimental-api=false and did
-		// not change the value of --endpoint, they likely want to use the
-		// old default value.
-		if endPoint == defaultEndpoint {
-			endPoint = "http://127.0.0.1:2379,http://127.0.0.1:4001"
-		}
-		return getRegistryClient(cCmd)
-	}
 
 	switch clientDriver {
 	case clientDriverAPI:
@@ -437,6 +424,22 @@ func getHTTPClient(cCmd *cobra.Command) (client.API, error) {
 	return client.NewHTTPClient(&hc, *ep)
 }
 
+func getEndpoint() string {
+	// The user explicitly set --experimental-api=false, so it trumps the
+	// --driver flag. This behavior exists for backwards-compatibilty.
+	experimentalAPI, _ := cmdFleet.PersistentFlags().GetBool("experimental-api")
+	endPoint, _ := cmdFleet.PersistentFlags().GetString("endpoint")
+	if !experimentalAPI {
+		// Additionally, if the user set --experimental-api=false and did
+		// not change the value of --endpoint, they likely want to use the
+		// old default value.
+		if endPoint == defaultEndpoint {
+			endPoint = "http://127.0.0.1:2379,http://127.0.0.1:4001"
+		}
+	}
+	return endPoint
+}
+
 func getRegistryClient(cCmd *cobra.Command) (client.API, error) {
 	var dial func(string, string) (net.Conn, error)
 	SSHUserName, _ := cmdFleet.PersistentFlags().GetString("ssh-username")
@@ -469,9 +472,8 @@ func getRegistryClient(cCmd *cobra.Command) (client.API, error) {
 		TLSClientConfig: tlsConfig,
 	}
 
-	endPoint, _ := cmdFleet.PersistentFlags().GetString("endpoint")
 	eCfg := etcd.Config{
-		Endpoints:               strings.Split(endPoint, ","),
+		Endpoints:               strings.Split(getEndpoint(), ","),
 		Transport:               trans,
 		HeaderTimeoutPerRequest: getRequestTimeoutFlag(cCmd),
 	}