github.com/GoogleContainerTools/kpt@v1.0.0-beta.50.0.20240520170205-c25345ffcbee/pkg/live/flatten.go (about)

     1  // Copyright 2022 The kpt Authors
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //      http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package live
    16  
    17  import (
    18  	"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
    19  	"k8s.io/apimachinery/pkg/runtime"
    20  )
    21  
    22  // Flatten returns a list containing 'in' objects with objects of kind List
    23  // replaced by their members.
    24  func Flatten(in []*unstructured.Unstructured) ([]*unstructured.Unstructured, error) {
    25  	var out []*unstructured.Unstructured
    26  
    27  	for _, o := range in {
    28  		if o.IsList() {
    29  			err := o.EachListItem(func(item runtime.Object) error {
    30  				item2 := item.(*unstructured.Unstructured)
    31  				out = append(out, item2)
    32  				return nil
    33  			})
    34  			if err != nil {
    35  				return nil, err
    36  			}
    37  		} else {
    38  			out = append(out, o)
    39  		}
    40  	}
    41  	return out, nil
    42  }