yaml

package module
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Published: May 27, 2022 License: BSD-3-Clause, MIT Imports: 13 Imported by: 0

README

yaml

Documentation

Overview

Package yaml provides a wrapper around go-yaml designed to enable a better way of handling YAML when marshaling to and from structs.

In short, this package first converts YAML to JSON using go-yaml and then uses json.Marshal and json.Unmarshal to convert to or from the struct. This means that it effectively reuses the JSON struct tags as well as the custom JSON methods MarshalJSON and UnmarshalJSON unlike go-yaml.

See also http://ghodss.com/2014/the-right-way-to-handle-yaml-in-golang

Index

Constants

This section is empty.

Variables

This section is empty.

Functions

func JSONToYAML

func JSONToYAML(j []byte) ([]byte, error)

Convert JSON to YAML.

func Marshal

func Marshal(o interface{}) ([]byte, error)

Marshals the object into JSON then converts JSON to YAML and returns the YAML.

func Unmarshal

func Unmarshal(y []byte, o interface{}, opts ...JSONOpt) error

Unmarshal converts YAML to JSON then uses JSON to unmarshal into an object, optionally configuring the behavior of the JSON unmarshal.

func UnmarshalStrict

func UnmarshalStrict(y []byte, o interface{}, opts ...JSONOpt) error

UnmarshalStrict is like Unmarshal except that any mapping keys that are duplicates will result in an error. To also be strict about unknown fields, add the DisallowUnknownFields option.

func YAMLToJSON

func YAMLToJSON(y []byte) ([]byte, error)

YAMLToJSON converts YAML to JSON. Since JSON is a subset of YAML, passing JSON through this method should be a no-op.

Things YAML can do that are not supported by JSON:

  • In YAML you can have binary and null keys in your maps. These are invalid in JSON. (int and float keys are converted to strings.)
  • Binary data in YAML with the !!binary tag is not supported. If you want to use binary data with this library, encode the data as base64 as usual but do not use the !!binary tag in your YAML. This will ensure the original base64 encoded data makes it all the way through to the JSON.

For strict decoding of YAML, use YAMLToJSONStrict.

func YAMLToJSONStrict

func YAMLToJSONStrict(y []byte) ([]byte, error)

YAMLToJSONStrict is like YAMLToJSON but enables strict YAML decoding, returning an error on any duplicate field names.

Types

type JSONOpt

type JSONOpt func(*json.Decoder) *json.Decoder

JSONOpt is a decoding option for decoding from JSON format.

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