/
helpers.go
165 lines (147 loc) · 4.42 KB
/
helpers.go
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package podstatus
import (
"fmt"
"io"
"github.com/morikuni/aec"
appsv1 "k8s.io/api/apps/v1"
appsv1beta1 "k8s.io/api/apps/v1beta1"
appsv1beta2 "k8s.io/api/apps/v1beta2"
autoscalingv1 "k8s.io/api/autoscaling/v1"
autoscalingv2beta1 "k8s.io/api/autoscaling/v2beta1"
autoscalingv2beta2 "k8s.io/api/autoscaling/v2beta2"
batchv1 "k8s.io/api/batch/v1"
batchv1beta1 "k8s.io/api/batch/v1beta1"
corev1 "k8s.io/api/core/v1"
extensionsv1beta1 "k8s.io/api/extensions/v1beta1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/labels"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/apimachinery/pkg/runtime/schema"
"k8s.io/cli-runtime/pkg/genericclioptions"
"k8s.io/cli-runtime/pkg/resource"
"k8s.io/client-go/kubernetes/scheme"
)
func clearLine(out io.Writer) {
eraseMode := aec.EraseModes.All
cl := aec.EraseLine(eraseMode)
_, _ = fmt.Fprint(out, cl)
}
func cursorUp(out io.Writer, l uint) {
_, _ = fmt.Fprint(out, aec.Up(l))
}
func isHPA(obj runtime.Object) bool {
switch obj.(type) {
case *autoscalingv1.HorizontalPodAutoscaler:
return true
case *autoscalingv2beta1.HorizontalPodAutoscaler:
return true
case *autoscalingv2beta2.HorizontalPodAutoscaler:
return true
}
return false
}
func isPod(obj runtime.Object) bool {
switch obj.(type) {
case *corev1.Pod:
return true
}
return false
}
func newBuilder(f genericclioptions.RESTClientGetter) *resource.Builder {
return resource.NewBuilder(f).
WithScheme(scheme.Scheme, scheme.Scheme.PrioritizedVersionsAllGroups()...).
Latest()
}
func getMatchLabels(selector *metav1.LabelSelector) (string, error) {
if selector == nil {
return "", fmt.Errorf("nil labelSelector")
}
return labels.FormatLabels(selector.MatchLabels), nil
}
func getSelectorFromObject(obj runtime.Object) (string, error) {
switch actual := obj.(type) {
// Service
case *corev1.Service:
return labels.FormatLabels(actual.Spec.Selector), nil
// Deployment
case *appsv1.Deployment:
return getMatchLabels(actual.Spec.Selector)
case *appsv1beta1.Deployment:
return getMatchLabels(actual.Spec.Selector)
case *appsv1beta2.Deployment:
return getMatchLabels(actual.Spec.Selector)
case *extensionsv1beta1.Deployment:
return getMatchLabels(actual.Spec.Selector)
// DaemonSet
case *appsv1.DaemonSet:
return getMatchLabels(actual.Spec.Selector)
case *appsv1beta2.DaemonSet:
return getMatchLabels(actual.Spec.Selector)
case *extensionsv1beta1.DaemonSet:
return getMatchLabels(actual.Spec.Selector)
// StatefulSet
case *appsv1.StatefulSet:
return getMatchLabels(actual.Spec.Selector)
case *appsv1beta1.StatefulSet:
return getMatchLabels(actual.Spec.Selector)
case *appsv1beta2.StatefulSet:
return getMatchLabels(actual.Spec.Selector)
// CronJob
case *batchv1beta1.CronJob:
return labels.FormatLabels(actual.Spec.JobTemplate.Spec.Template.Labels), nil
// Job
case *batchv1.Job:
return getMatchLabels(actual.Spec.Selector)
// ReplicaSet
case *extensionsv1beta1.ReplicaSet:
return getMatchLabels(actual.Spec.Selector)
case *appsv1.ReplicaSet:
return getMatchLabels(actual.Spec.Selector)
case *appsv1beta2.ReplicaSet:
return getMatchLabels(actual.Spec.Selector)
default:
return "", fmt.Errorf("unknown object: %#v", obj)
}
}
func getRefObject(obj runtime.Object, f genericclioptions.RESTClientGetter) (runtime.Object, error) {
var (
ns, name, kind, apiVersion string
)
switch actual := obj.(type) {
case *autoscalingv1.HorizontalPodAutoscaler:
ref := actual.Spec.ScaleTargetRef
ns = actual.Namespace
name, kind, apiVersion = ref.Name, ref.Kind, ref.APIVersion
case *autoscalingv2beta1.HorizontalPodAutoscaler:
ref := actual.Spec.ScaleTargetRef
ns = actual.Namespace
name, kind, apiVersion = ref.Name, ref.Kind, ref.APIVersion
case *autoscalingv2beta2.HorizontalPodAutoscaler:
ref := actual.Spec.ScaleTargetRef
ns = actual.Namespace
name, kind, apiVersion = ref.Name, ref.Kind, ref.APIVersion
default:
return nil, fmt.Errorf("not hpa: %v", obj)
}
gv, err := schema.ParseGroupVersion(apiVersion)
if err != nil {
return nil, err
}
gvk := gv.WithKind(kind)
mapper, err := f.ToRESTMapper()
if err != nil {
return nil, err
}
mapping, err := mapper.RESTMapping(gvk.GroupKind(), gvk.Version)
if err != nil {
return nil, err
}
result := newBuilder(f).
NamespaceParam(ns).DefaultNamespace().
ResourceNames(mapping.Resource.Resource, name).SingleResourceType().
Do()
if err := result.Err(); err != nil {
return nil, err
}
return result.Object()
}