mvdan.cc
1// Copyright 2024 The CUE 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
15package toml
16
17import (
18 "io"
19
20 "github.com/pelletier/go-toml/v2"
21
22 "cuelang.org/go/cue"
23)
24
25// TODO(mvdan): encode options
26
27// TODO(mvdan): the encoder below is based on map[string]any since go-toml/v2/unstable
28// does not support printing or encoding Nodes; this means no support for comments,
29// positions such as empty lines, or the relative order of fields.
30
31// NewEncoder creates an encoder to stream encoded TOML bytes.
32func NewEncoder(w io.Writer) *Encoder {
33 return &Encoder{encoder: toml.NewEncoder(w)}
34}
35
36// Encoder implements the encoding state.
37type Encoder struct {
38 encoder *toml.Encoder
39}
40
41func (e *Encoder) Encode(val cue.Value) error {
42 var v any
43 if err := val.Decode(&v); err != nil {
44 return err
45 }
46 return e.encoder.Encode(v)
47}