k8s.io/perf-tests/clusterloader2@v0.0.0-20240304094227-64bdb12da87e/pkg/config/codec.go (about)

     1  /*
     2  Copyright 2018 The Kubernetes 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 config
    18  
    19  import (
    20  	"bytes"
    21  	"errors"
    22  	"fmt"
    23  	"strings"
    24  
    25  	"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
    26  	"k8s.io/apimachinery/pkg/util/yaml"
    27  	"k8s.io/client-go/kubernetes/scheme"
    28  )
    29  
    30  var (
    31  	// ErrorEmptyFile indicates that manifest file was empty.
    32  	// Useful to distinguish where the manifast was empty or malformed.
    33  	ErrorEmptyFile = errors.New("emptyfile")
    34  )
    35  
    36  // convertToObject converts array of bytes into unstructured object.
    37  func convertToObject(raw []byte) (*unstructured.Unstructured, error) {
    38  	if isEmpty(raw) {
    39  		return nil, ErrorEmptyFile
    40  	}
    41  	obj := &unstructured.Unstructured{}
    42  	_, _, err := scheme.Codecs.UniversalDeserializer().Decode(raw, nil, obj)
    43  	if err != nil {
    44  		return nil, fmt.Errorf("unmarshaling error: %v", err)
    45  	}
    46  	return obj, nil
    47  }
    48  
    49  func decodeInto(raw []byte, v interface{}) error {
    50  	if err := yaml.NewYAMLOrJSONDecoder(bytes.NewBuffer(raw), 4096).Decode(v); err != nil {
    51  		return fmt.Errorf("decoding failed: %v", err)
    52  	}
    53  	return nil
    54  }
    55  
    56  func isEmpty(raw []byte) bool {
    57  	return strings.TrimSpace(string(raw[:])) == ""
    58  }