Output only controller specific JSON Schema

This commit makes schemagen output only JSON Schema for the
Kedge controllers by default. This behavior can be changed by
setting --controller flag to false.

Fixes kedgeproject#22

cmd/root.go

@@ -14,6 +14,7 @@ var (
 	kedgeSpecLocation string
 	kubernetesSchema  string
 	openshiftSchema   string
+	isController      bool
 )
 
 // RootCmd represents the base command when called without any subcommands
@@ -27,7 +28,7 @@ var RootCmd = &cobra.Command{
 		}
 	},
 	Run: func(cmd *cobra.Command, args []string) {
-		if err := pkg.Conversion(kedgeSpecLocation, kubernetesSchema, openshiftSchema); err != nil {
+		if err := pkg.Conversion(kedgeSpecLocation, kubernetesSchema, openshiftSchema, isController); err != nil {
 			fmt.Println(err)
 			os.Exit(-1)
 		}
@@ -46,4 +47,5 @@ func init() {
 	RootCmd.Flags().StringVarP(&kedgeSpecLocation, "kedgespec", "k", "types.go", "Specify the location of Kedge spec file")
 	RootCmd.Flags().StringVarP(&kubernetesSchema, "k8sSchema", "s", "swagger.json", "Specify the location of Kuberenetes Schema file")
 	RootCmd.Flags().StringVarP(&openshiftSchema, "osSchema", "o", "osv2.json", "Specify the location of OpenShift schema file")
+	RootCmd.Flags().BoolVarP(&isController, "controller", "c", true, "output only controller specific definitions")
 }

pkg/conversion.go

@@ -47,7 +47,7 @@ func MergeDefinitions(target, src *openapi.OpenAPIDefinition) {
 	}
 }
 
-func Conversion(KedgeSpecLocation, KubernetesSchema, OpenShiftSchema string) error {
+func Conversion(KedgeSpecLocation, KubernetesSchema, OpenShiftSchema string, controllerOnly bool) error {
 	defs, mapping, err := GenerateOpenAPIDefinitions(KedgeSpecLocation)
 	if err != nil {
 		return err
@@ -72,10 +72,26 @@ func Conversion(KedgeSpecLocation, KubernetesSchema, OpenShiftSchema string) err
 	for k, v := range defs {
 		api.Schema.SchemaProps.Definitions[k] = v
 	}
+
+	if controllerOnly {
+		retainOnlyControllers(api.Schema.Definitions)
+	}
+
 	PrintJSONStdOut(api.Schema)
 	return nil
 }
 
+func retainOnlyControllers(definitions spec.Definitions) {
+	for k := range definitions {
+		switch k {
+		case "io.kedge.DeploymentSpecMod", "io.kedge.DeploymentConfigSpecMod", "io.kedge.JobSpecMod":
+			continue
+		default:
+			delete(definitions, k)
+		}
+	}
+}
+
 func augmentProperties(s, t spec.Schema) spec.Schema {
 	for k, v := range s.Properties {
 		if _, ok := t.Properties[k]; !ok {