knative.dev/pkg@v0.0.0-20260602142205-ac97e43f6622/unstructured/unstructured.go (about)

     1  /*
     2  Copyright 2021 The Knative Authors
     3  
     4  Licensed under the Apache License, Version 2.0 (the "License");
     5  you may not use this file except in compliance with the License.
     6  You may obtain a copy of the License at
     7  
     8      http://www.apache.org/licenses/LICENSE-2.0
     9  
    10  Unless required by applicable law or agreed to in writing, software
    11  distributed under the License is distributed on an "AS IS" BASIS,
    12  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13  See the License for the specific language governing permissions and
    14  limitations under the License.
    15  */
    16  
    17  package unstructured
    18  
    19  import (
    20  	"fmt"
    21  
    22  	"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
    23  	"k8s.io/apimachinery/pkg/runtime"
    24  )
    25  
    26  // ConvertTo converts a runtime.Object to an unstructured.Unstructured type
    27  func ConvertTo(s *runtime.Scheme, obj runtime.Object) (*unstructured.Unstructured, error) {
    28  	var (
    29  		err error
    30  		u   unstructured.Unstructured
    31  	)
    32  
    33  	u.Object, err = runtime.DefaultUnstructuredConverter.ToUnstructured(obj)
    34  	if err != nil {
    35  		return nil, fmt.Errorf("failed to convert to unstructured: %w", err)
    36  	}
    37  
    38  	gvk := u.GroupVersionKind()
    39  	if gvk.Group == "" || gvk.Kind == "" {
    40  		gvks, _, err := s.ObjectKinds(obj)
    41  		if err != nil {
    42  			return nil, fmt.Errorf("failed to convert to unstructured: %w", err)
    43  		}
    44  		apiv, k := gvks[0].ToAPIVersionAndKind()
    45  		u.SetAPIVersion(apiv)
    46  		u.SetKind(k)
    47  	}
    48  	return &u, nil
    49  }
    50  
    51  // ConvertManyTo converts a slice of runtime.Object to a slice of *unstructured.Unstructured
    52  func ConvertManyTo(s *runtime.Scheme, objs []runtime.Object) ([]*unstructured.Unstructured, error) {
    53  	ul := make([]*unstructured.Unstructured, 0, len(objs))
    54  
    55  	for _, obj := range objs {
    56  		u, err := ConvertTo(s, obj)
    57  		if err != nil {
    58  			return nil, err
    59  		}
    60  
    61  		ul = append(ul, u)
    62  	}
    63  	return ul, nil
    64  }
    65  
    66  // ConvertManyToObjects converts a slice of runtime.Object to a slice of runtime.Objects
    67  // where each element is of the type *unstructured.Unstructured
    68  func ConvertManyToObjects(s *runtime.Scheme, objs []runtime.Object) ([]runtime.Object, error) {
    69  	ul := make([]runtime.Object, 0, len(objs))
    70  
    71  	for _, obj := range objs {
    72  		u, err := ConvertTo(s, obj)
    73  		if err != nil {
    74  			return nil, err
    75  		}
    76  
    77  		ul = append(ul, u)
    78  	}
    79  	return ul, nil
    80  }