mirror of
https://github.com/kubernetes-sigs/kustomize.git
synced 2026-06-12 01:14:22 +00:00
119 lines
3.5 KiB
Go
119 lines
3.5 KiB
Go
package k8sdeps
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import (
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"encoding/json"
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"fmt"
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"io"
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"strings"
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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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// NewKunstructuredFromMap returns a new instance of Kunstructured.
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func NewKunstructuredFromMap(m map[string]interface{}) ifc.Kunstructured {
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return NewKunstructuredFromUnstruct(unstructured.Unstructured{Object: m})
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}
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// NewKunstructuredFromUnstruct returns a new instance of Kunstructured.
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func NewKunstructuredFromUnstruct(u unstructured.Unstructured) ifc.Kunstructured {
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return &UnstructAdapter{Unstructured: u}
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}
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// NewKunstructuredSliceFromBytes unmarshalls bytes into a Kunstructured slice.
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func NewKunstructuredSliceFromBytes(
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in []byte, decoder ifc.Decoder) ([]ifc.Kunstructured, error) {
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decoder.SetInput(in)
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var result []ifc.Kunstructured
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var err error
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for err == nil || isEmptyYamlError(err) {
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var out unstructured.Unstructured
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err = decoder.Decode(&out)
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if err == nil {
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result = append(result, &UnstructAdapter{Unstructured: out})
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}
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}
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if err != io.EOF {
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return nil, err
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}
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return result, nil
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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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return gvk.FromSchemaGvk(fs.GroupVersionKind())
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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(fieldPath string) (string, error) {
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return getFieldValue(fs.UnstructuredContent(), strings.Split(fieldPath, "."))
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}
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func getFieldValue(m map[string]interface{}, pathToField []string) (string, error) {
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if len(pathToField) == 0 {
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return "", fmt.Errorf("field not found")
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}
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if len(pathToField) == 1 {
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if v, found := m[pathToField[0]]; found {
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if s, ok := v.(string); ok {
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return s, nil
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}
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return "", fmt.Errorf("value at fieldpath is not of string type")
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}
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return "", fmt.Errorf("field at given fieldpath does not exist")
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}
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v := m[pathToField[0]]
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switch typedV := v.(type) {
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case map[string]interface{}:
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return getFieldValue(typedV, pathToField[1:])
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default:
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return "", fmt.Errorf("%#v is not expected to be a primitive type", typedV)
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}
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}
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func isEmptyYamlError(err error) bool {
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return strings.Contains(err.Error(), "is missing in 'null'")
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}
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