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dynamic_process.go
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dynamic_process.go
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package templateprocessingclient
import (
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
"k8s.io/apimachinery/pkg/runtime"
utilruntime "k8s.io/apimachinery/pkg/util/runtime"
"k8s.io/client-go/dynamic"
templatev1 "github.com/openshift/api/template/v1"
)
type DynamicTemplateProcessor interface {
ProcessToList(template *templatev1.Template) (*unstructured.UnstructuredList, error)
ProcessToListFromUnstructured(unstructuredTemplate *unstructured.Unstructured) (*unstructured.UnstructuredList, error)
}
type dynamicTemplateProcessor struct {
client dynamic.Interface
}
func NewDynamicTemplateProcessor(client dynamic.Interface) DynamicTemplateProcessor {
return &dynamicTemplateProcessor{client: client}
}
func (c *dynamicTemplateProcessor) ProcessToList(template *templatev1.Template) (*unstructured.UnstructuredList, error) {
versionedTemplate, err := scheme.ConvertToVersion(template, templatev1.GroupVersion)
if err != nil {
return nil, err
}
unstructuredTemplate, err := runtime.DefaultUnstructuredConverter.ToUnstructured(versionedTemplate)
if err != nil {
return nil, err
}
return c.ProcessToListFromUnstructured(&unstructured.Unstructured{Object: unstructuredTemplate})
}
func (c *dynamicTemplateProcessor) ProcessToListFromUnstructured(unstructuredTemplate *unstructured.Unstructured) (*unstructured.UnstructuredList, error) {
processedTemplate, err := c.client.Resource(templatev1.GroupVersion.WithResource("processedtemplates")).
Namespace("default").Create(unstructuredTemplate, metav1.CreateOptions{})
if err != nil {
return nil, err
}
// convert the template into something we iterate over as a list
if err := unstructured.SetNestedField(processedTemplate.Object, processedTemplate.Object["objects"], "items"); err != nil {
return nil, err
}
return processedTemplate.ToList()
}
var (
scheme = runtime.NewScheme()
)
func init() {
utilruntime.Must(templatev1.Install(scheme))
}