mirror of https://github.com/k3s-io/k3s
93 lines
2.7 KiB
Go
93 lines
2.7 KiB
Go
/*
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Copyright 2018 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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// Package kunstruct provides unstructured from api machinery and factory for creating unstructured
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package kunstruct
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import (
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"encoding/json"
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"fmt"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
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"k8s.io/apimachinery/pkg/runtime"
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"sigs.k8s.io/kustomize/pkg/gvk"
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"sigs.k8s.io/kustomize/pkg/ifc"
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)
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var _ ifc.Kunstructured = &UnstructAdapter{}
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// UnstructAdapter wraps unstructured.Unstructured from
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// https://github.com/kubernetes/apimachinery/blob/master/
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// pkg/apis/meta/v1/unstructured/unstructured.go
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// to isolate dependence on apimachinery.
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type UnstructAdapter struct {
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unstructured.Unstructured
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}
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// NewKunstructuredFromObject returns a new instance of Kunstructured.
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func NewKunstructuredFromObject(obj runtime.Object) (ifc.Kunstructured, error) {
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// Convert obj to a byte stream, then convert that to JSON (Unstructured).
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marshaled, err := json.Marshal(obj)
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if err != nil {
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return &UnstructAdapter{}, err
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}
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var u unstructured.Unstructured
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err = u.UnmarshalJSON(marshaled)
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// creationTimestamp always 'null', remove it
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u.SetCreationTimestamp(metav1.Time{})
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return &UnstructAdapter{Unstructured: u}, err
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}
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// GetGvk returns the Gvk name of the object.
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func (fs *UnstructAdapter) GetGvk() gvk.Gvk {
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x := fs.GroupVersionKind()
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return gvk.Gvk{
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Group: x.Group,
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Version: x.Version,
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Kind: x.Kind,
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}
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}
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// Copy provides a copy behind an interface.
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func (fs *UnstructAdapter) Copy() ifc.Kunstructured {
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return &UnstructAdapter{*fs.DeepCopy()}
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}
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// Map returns the unstructured content map.
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func (fs *UnstructAdapter) Map() map[string]interface{} {
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return fs.Object
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}
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// SetMap overrides the unstructured content map.
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func (fs *UnstructAdapter) SetMap(m map[string]interface{}) {
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fs.Object = m
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}
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// GetFieldValue returns value at the given fieldpath.
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func (fs *UnstructAdapter) GetFieldValue(path string) (string, error) {
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fields, err := parseFields(path)
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if err != nil {
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return "", err
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}
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s, found, err := unstructured.NestedString(
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fs.UnstructuredContent(), fields...)
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if found || err != nil {
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return s, err
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}
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return "", fmt.Errorf("no field named '%s'", path)
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}
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