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yaml.go
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yaml.go
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package yaml
import (
"bufio"
"bytes"
"io"
"github.com/pkg/errors"
"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/apimachinery/pkg/runtime/serializer"
utilyaml "k8s.io/apimachinery/pkg/util/yaml"
clientsetscheme "k8s.io/client-go/kubernetes/scheme"
"sigs.k8s.io/yaml"
)
// MarshalToYaml marshals an object into yaml.
func MarshalToYaml(obj runtime.Object, gv runtime.GroupVersioner) ([]byte, error) {
return MarshalToYamlForCodecs(obj, gv, clientsetscheme.Codecs)
}
// MarshalToYamlForCodecs marshals an object into yaml using the specified codec
func MarshalToYamlForCodecs(obj runtime.Object, gv runtime.GroupVersioner, codecs serializer.CodecFactory) ([]byte, error) {
const mediaType = runtime.ContentTypeYAML
info, ok := runtime.SerializerInfoForMediaType(codecs.SupportedMediaTypes(), mediaType)
if !ok {
return []byte{}, errors.Errorf("unsupported media type %q", mediaType)
}
encoder := codecs.EncoderForVersion(info.Serializer, gv)
return runtime.Encode(encoder, obj)
}
// UnmarshalFromYaml unmarshals yaml into an object.
func UnmarshalFromYaml(buffer []byte, gv runtime.GroupVersioner) (runtime.Object, error) {
return UnmarshalFromYamlForCodecs(buffer, gv, clientsetscheme.Codecs)
}
// UnmarshalFromYamlForCodecs unmarshals yaml into an object using the specified codec
func UnmarshalFromYamlForCodecs(buffer []byte, gv runtime.GroupVersioner, codecs serializer.CodecFactory) (runtime.Object, error) {
const mediaType = runtime.ContentTypeYAML
info, ok := runtime.SerializerInfoForMediaType(codecs.SupportedMediaTypes(), mediaType)
if !ok {
return nil, errors.Errorf("unsupported media type %q", mediaType)
}
decoder := codecs.DecoderToVersion(info.Serializer, gv)
return runtime.Decode(decoder, buffer)
}
func UnmarshalFromYamlUnstructured(data []byte) ([]*unstructured.Unstructured, error) {
objs := make([]*unstructured.Unstructured, 0)
reader := utilyaml.NewYAMLReader(bufio.NewReader(bytes.NewBuffer(data)))
for {
b, err := reader.Read()
if err == io.EOF {
break
}
if err != nil {
return nil, err
}
if len(b) == 0 {
break
}
var m map[string]interface{}
if err := yaml.Unmarshal(b, &m); err != nil {
return nil, err
}
if len(m) == 0 {
continue
}
obj := &unstructured.Unstructured{
Object: m,
}
objs = append(objs, obj)
}
return objs, nil
}