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default.go
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default.go
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// Copyright 2021 The Kubernetes Authors.
// SPDX-License-Identifier: Apache-2.0
package statusreaders
import (
"context"
"fmt"
"k8s.io/apimachinery/pkg/api/meta"
"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
"k8s.io/apimachinery/pkg/runtime/schema"
"sigs.k8s.io/cli-utils/pkg/kstatus/polling/engine"
"sigs.k8s.io/cli-utils/pkg/kstatus/polling/event"
"sigs.k8s.io/cli-utils/pkg/kstatus/status"
"sigs.k8s.io/cli-utils/pkg/object"
)
// NewDefaultStatusReader returns a DelegatingStatusReader that wraps a list of
// statusreaders to cover all built-in Kubernetes resources and other CRDs that
// follow known status conventions.
func NewDefaultStatusReader(mapper meta.RESTMapper) engine.StatusReader {
return NewStatusReader(mapper)
}
// NewStatusReader returns a DelegatingStatusReader that includes the statusreaders
// for the build-in Kubernetes resources and also any provided custom status readers.
func NewStatusReader(mapper meta.RESTMapper, statusReaders ...engine.StatusReader) engine.StatusReader {
defaultStatusReader := NewGenericStatusReader(mapper, status.Compute)
replicaSetStatusReader := NewReplicaSetStatusReader(mapper, defaultStatusReader)
deploymentStatusReader := NewDeploymentResourceReader(mapper, replicaSetStatusReader)
statefulSetStatusReader := NewStatefulSetResourceReader(mapper, defaultStatusReader)
statusReaders = append(statusReaders,
deploymentStatusReader,
statefulSetStatusReader,
replicaSetStatusReader,
defaultStatusReader,
)
return &DelegatingStatusReader{
StatusReaders: statusReaders,
}
}
type DelegatingStatusReader struct {
StatusReaders []engine.StatusReader
}
func (dsr *DelegatingStatusReader) Supports(gk schema.GroupKind) bool {
for _, sr := range dsr.StatusReaders {
if sr.Supports(gk) {
return true
}
}
return false
}
func (dsr *DelegatingStatusReader) ReadStatus(
ctx context.Context,
reader engine.ClusterReader,
id object.ObjMetadata,
) (*event.ResourceStatus, error) {
gk := id.GroupKind
for _, sr := range dsr.StatusReaders {
if sr.Supports(gk) {
return sr.ReadStatus(ctx, reader, id)
}
}
return nil, fmt.Errorf("no status reader supports this resource: %v", gk)
}
func (dsr *DelegatingStatusReader) ReadStatusForObject(
ctx context.Context,
reader engine.ClusterReader,
obj *unstructured.Unstructured,
) (*event.ResourceStatus, error) {
gk := obj.GroupVersionKind().GroupKind()
for _, sr := range dsr.StatusReaders {
if sr.Supports(gk) {
return sr.ReadStatusForObject(ctx, reader, obj)
}
}
return nil, fmt.Errorf("no status reader supports this resource: %v", gk)
}