fix golint issues, exported doc (#451)

tools/goctl/kube/kube.go

@@ -36,6 +36,7 @@ type Deployment struct {
 	MaxReplicas int
 }
 
+// DeploymentCommand is used to generate the kubernetes deployment yaml files.
 func DeploymentCommand(c *cli.Context) error {
 	nodePort := c.Int("nodePort")
 	// 0 to disable the nodePort type
@@ -80,14 +81,17 @@ func DeploymentCommand(c *cli.Context) error {
 	return nil
 }
 
+// Category returns the category of the deployments.
 func Category() string {
 	return category
 }
 
+// Clean cleans the generated deployment files.
 func Clean() error {
 	return util.Clean(category)
 }
 
+// GenTemplates generates the deployment template files.
 func GenTemplates(_ *cli.Context) error {
 	return util.InitTemplates(category, map[string]string{
 		deployTemplateFile: deploymentTemplate,
@@ -95,10 +99,12 @@ func GenTemplates(_ *cli.Context) error {
 	})
 }
 
+// RevertTemplate reverts the given template file to the default value.
 func RevertTemplate(name string) error {
 	return util.CreateTemplate(category, name, deploymentTemplate)
 }
 
+// Update updates the template files to the templates built in current goctl.
 func Update() error {
 	err := Clean()
 	if err != nil {