Do not ping registry from the cli

Docker-DCO-1.1-Signed-off-by: Michael Crosby <michael@crosbymichael.com> (github: crosbymichael)

auth/auth.go

@@ -151,12 +151,15 @@ func SaveConfig(configFile *ConfigFile) error {
 
 // try to register/login to the registry server
 func Login(authConfig *AuthConfig, factory *utils.HTTPRequestFactory) (string, error) {
-	client := &http.Client{}
-	reqStatusCode := 0
-	var status string
-	var reqBody []byte
+	var (
+		status        string
+		reqBody       []byte
+		err           error
+		client        = &http.Client{}
+		reqStatusCode = 0
+		serverAddress = authConfig.ServerAddress
+	)
 
-	serverAddress := authConfig.ServerAddress
 	if serverAddress == "" {
 		serverAddress = IndexServerAddress()
 	}

commands.go

@@ -266,11 +266,7 @@ func (cli *DockerCli) CmdLogin(args ...string) error {
 	}
 	serverAddress := auth.IndexServerAddress()
 	if len(cmd.Args()) > 0 {
-		serverAddress, err = registry.ExpandAndVerifyRegistryUrl(cmd.Arg(0))
-		if err != nil {
-			return err
-		}
-		fmt.Fprintf(cli.out, "Login against server at %s\n", serverAddress)
+		serverAddress = cmd.Arg(0)
 	}
 
 	promptDefault := func(prompt string, configDefault string) {

server.go

@@ -200,8 +200,20 @@ func (srv *Server) ContainerKill(job *engine.Job) engine.Status {
 }
 
 func (srv *Server) Auth(job *engine.Job) engine.Status {
-	authConfig := &auth.AuthConfig{}
+	var (
+		err        error
+		authConfig = &auth.AuthConfig{}
+	)
+
 	job.GetenvJson("authConfig", authConfig)
+	// TODO: this is only done here because auth and registry need to be merged into one pkg
+	if addr := authConfig.ServerAddress; addr != "" && addr != auth.IndexServerAddress() {
+		addr, err = registry.ExpandAndVerifyRegistryUrl(addr)
+		if err != nil {
+			return job.Error(err)
+		}
+		authConfig.ServerAddress = addr
+	}
 	status, err := auth.Login(authConfig, srv.HTTPRequestFactory(nil))
 	if err != nil {
 		return job.Error(err)