fix golint issues, exported doc (#451)

tools/goctl/api/gogen/template.go

@@ -26,10 +26,22 @@ var templates = map[string]string{
 	mainTemplateFile:    mainTemplate,
 }
 
+// Category returns the category of the api files.
+func Category() string {
+	return category
+}
+
+// Clean cleans the generated deployment files.
+func Clean() error {
+	return util.Clean(category)
+}
+
+// GenTemplates generates api template files.
 func GenTemplates(_ *cli.Context) error {
 	return util.InitTemplates(category, templates)
 }
 
+// RevertTemplate reverts the given template file to the default value.
 func RevertTemplate(name string) error {
 	content, ok := templates[name]
 	if !ok {
@@ -38,6 +50,7 @@ func RevertTemplate(name string) error {
 	return util.CreateTemplate(category, name, content)
 }
 
+// Update updates the template files to the templates built in current goctl.
 func Update() error {
 	err := Clean()
 	if err != nil {
@@ -46,11 +59,3 @@ func Update() error {
 
 	return util.InitTemplates(category, templates)
 }
-
-func Clean() error {
-	return util.Clean(category)
-}
-
-func Category() string {
-	return category
-}