client.StatusError don't be returned as a pointer

closes #12373

1. remove & from client.StatusError
2. remove * from Error method

Signed-off-by: Deshi Xiao <xiaods@gmail.com>

api/client/attach.go

@@ -80,7 +80,7 @@ func (cli *DockerCli) CmdAttach(args ...string) error {
 		return err
 	}
 	if status != 0 {
-		return &StatusError{StatusCode: status}
+		return StatusError{StatusCode: status}
 	}
 
 	return nil

api/client/build.go

@@ -302,7 +302,7 @@ func (cli *DockerCli) CmdBuild(args ...string) error {
 		if jerr.Code == 0 {
 			jerr.Code = 1
 		}
-		return &StatusError{Status: jerr.Message, StatusCode: jerr.Code}
+		return StatusError{Status: jerr.Message, StatusCode: jerr.Code}
 	}
 	return err
 }

api/client/client.go

@@ -12,6 +12,6 @@ type StatusError struct {
 	StatusCode int
 }
 
-func (e *StatusError) Error() string {
+func (e StatusError) Error() string {
 	return fmt.Sprintf("Status: %s, Code: %d", e.Status, e.StatusCode)
 }

api/client/exec.go

@@ -20,7 +20,7 @@ func (cli *DockerCli) CmdExec(args ...string) error {
 	execConfig, err := runconfig.ParseExec(cmd, args)
 	// just in case the ParseExec does not exit
 	if execConfig.Container == "" || err != nil {
-		return &StatusError{StatusCode: 1}
+		return StatusError{StatusCode: 1}
 	}
 
 	stream, _, err := cli.call("POST", "/containers/"+execConfig.Container+"/exec", execConfig, nil)
@@ -121,7 +121,7 @@ func (cli *DockerCli) CmdExec(args ...string) error {
 	}
 
 	if status != 0 {
-		return &StatusError{StatusCode: status}
+		return StatusError{StatusCode: status}
 	}
 
 	return nil

api/client/inspect.go

@@ -26,7 +26,7 @@ func (cli *DockerCli) CmdInspect(args ...string) error {
 		var err error
 		if tmpl, err = template.New("").Funcs(funcMap).Parse(*tmplStr); err != nil {
 			fmt.Fprintf(cli.err, "Template parsing error: %v\n", err)
-			return &StatusError{StatusCode: 64,
+			return StatusError{StatusCode: 64,
 				Status: "Template parsing error: " + err.Error()}
 		}
 	}
@@ -85,7 +85,7 @@ func (cli *DockerCli) CmdInspect(args ...string) error {
 	}
 
 	if status != 0 {
-		return &StatusError{StatusCode: status}
+		return StatusError{StatusCode: status}
 	}
 	return nil
 }

api/client/run.go

@@ -241,7 +241,7 @@ func (cli *DockerCli) CmdRun(args ...string) error {
 		}
 	}
 	if status != 0 {
-		return &StatusError{StatusCode: status}
+		return StatusError{StatusCode: status}
 	}
 	return nil
 }

api/client/start.go

@@ -155,7 +155,7 @@ func (cli *DockerCli) CmdStart(args ...string) error {
 			return err
 		}
 		if status != 0 {
-			return &StatusError{StatusCode: status}
+			return StatusError{StatusCode: status}
 		}
 	}
 	return nil

docker/docker.go

@@ -135,7 +135,7 @@ func main() {
 	}
 
 	if err := cli.Cmd(flag.Args()...); err != nil {
-		if sterr, ok := err.(*client.StatusError); ok {
+		if sterr, ok := err.(client.StatusError); ok {
 			if sterr.Status != "" {
 				logrus.Println(sterr.Status)
 			}