add required flags validation for create api command

cmd/api.go

@@ -89,6 +89,10 @@ func (o *apiOptions) runAddAPI() {
 		log.Fatalf("unknown pattern %q", o.pattern)
 	}
 
+	if err := o.apiScaffolder.Validate(); err != nil {
+		log.Fatalln(err)
+	}
+
 	reader := bufio.NewReader(os.Stdin)
 	if !o.resourceFlag.Changed {
 		fmt.Println("Create Resource [y/n]")
@@ -100,10 +104,6 @@ func (o *apiOptions) runAddAPI() {
 		o.apiScaffolder.DoController = util.Yesno(reader)
 	}
 
-	if err := o.apiScaffolder.Validate(); err != nil {
-		log.Fatalln(err)
-	}
-
 	fmt.Println("Writing scaffold for you to edit...")
 
 	if err := o.apiScaffolder.Scaffold(); err != nil {

pkg/scaffold/resource/resource.go

@@ -54,39 +54,59 @@ type Resource struct {
 
 // Validate checks the Resource values to make sure they are valid.
 func (r *Resource) Validate() error {
-	if len(r.Group) == 0 {
+	if r.isGroupEmpty() {
 		return fmt.Errorf("group cannot be empty")
 	}
-	if len(r.Version) == 0 {
+	if r.isVersionEmpty() {
 		return fmt.Errorf("version cannot be empty")
 	}
-	if len(r.Kind) == 0 {
+	if r.isKindEmpty() {
 		return fmt.Errorf("kind cannot be empty")
 	}
-
-	if len(r.Resource) == 0 {
-		r.Resource = flect.Pluralize(strings.ToLower(r.Kind))
-	}
-
+	// Check if the Group has a valid value for for it
 	if err := IsDNS1123Subdomain(r.Group); err != nil {
 		return fmt.Errorf("group name is invalid: (%v)", err)
 	}
-
-	r.GroupImportSafe = strings.Replace(r.Group, "-", "", -1)
-	r.GroupImportSafe = strings.Replace(r.GroupImportSafe, ".", "", -1)
-
+	// Check if the version is a valid value
 	versionMatch := regexp.MustCompile("^v\\d+(alpha\\d+|beta\\d+)?$")
 	if !versionMatch.MatchString(r.Version) {
 		return fmt.Errorf(
 			"version must match ^v\\d+(alpha\\d+|beta\\d+)?$ (was %s)", r.Version)
 	}
+	// Check if the Kind is a valid value
 	if r.Kind != flect.Pascalize(r.Kind) {
 		return fmt.Errorf("kind must be PascalCase (expected %s was %s)", flect.Pascalize(r.Kind), r.Kind)
 	}
 
+	// todo: move it for the proper place since they are not validations and then, should not be here
+	// Add in r.Resource the Kind plural
+	if len(r.Resource) == 0 {
+		r.Resource = flect.Pluralize(strings.ToLower(r.Kind))
+	}
+	// Replace the caracter "-" for "" to allow scaffold the go imports
+	r.GroupImportSafe = strings.Replace(r.Group, "-", "", -1)
+    r.GroupImportSafe = strings.Replace(r.GroupImportSafe, ".", "", -1)
 	return nil
 }
 
+// isKindEmpty will return true if the --kind flag do not be informed
+// NOTE: required check if the flags are assuming the other flags as value
+func (r *Resource) isKindEmpty() bool {
+	return len(r.Kind) == 0 || r.Kind == "--group" || r.Kind == "--version"
+}
+
+// isVersionEmpty will return true if the --version flag do not be informed
+// NOTE: required check if the flags are assuming the other flags as value
+func (r *Resource) isVersionEmpty() bool {
+	return len(r.Version) == 0 || r.Version == "--group" || r.Version == "--kind"
+}
+
+// isVersionEmpty will return true if the --group flag do not be informed
+// NOTE: required check if the flags are assuming the other flags as value
+func (r *Resource) isGroupEmpty() bool {
+	return len(r.Group) == 0 || r.Group == "--version" || r.Group == "--kind"
+}
+
 // The following code came from "k8s.io/apimachinery/pkg/util/validation"
 // If be required the usage of more funcs from this then please replace it for the import
 // ---------------------------------------