mirror of
https://github.com/gohugoio/hugo.git
synced 2024-11-07 20:30:36 -05:00
88 lines
2.1 KiB
Go
88 lines
2.1 KiB
Go
package transform
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import (
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"bytes"
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"strings"
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"github.com/pkg/errors"
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"github.com/gohugoio/hugo/parser"
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"github.com/gohugoio/hugo/parser/metadecoders"
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"github.com/spf13/cast"
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)
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// Remarshal is used in the Hugo documentation to convert configuration
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// examples from YAML to JSON, TOML (and possibly the other way around).
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// The is primarily a helper for the Hugo docs site.
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// It is not a general purpose YAML to TOML converter etc., and may
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// change without notice if it serves a purpose in the docs.
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// Format is one of json, yaml or toml.
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func (ns *Namespace) Remarshal(format string, data any) (string, error) {
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var meta map[string]any
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format = strings.TrimSpace(strings.ToLower(format))
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mark, err := toFormatMark(format)
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if err != nil {
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return "", err
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}
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if m, ok := data.(map[string]any); ok {
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meta = m
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} else {
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from, err := cast.ToStringE(data)
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if err != nil {
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return "", err
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}
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from = strings.TrimSpace(from)
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if from == "" {
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return "", nil
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}
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fromFormat := metadecoders.Default.FormatFromContentString(from)
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if fromFormat == "" {
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return "", errors.New("failed to detect format from content")
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}
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meta, err = metadecoders.Default.UnmarshalToMap([]byte(from), fromFormat)
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if err != nil {
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return "", err
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}
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}
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// Make it so 1.0 float64 prints as 1 etc.
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applyMarshalTypes(meta)
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var result bytes.Buffer
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if err := parser.InterfaceToConfig(meta, mark, &result); err != nil {
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return "", err
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}
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return result.String(), nil
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}
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// The unmarshal/marshal dance is extremely type lossy, and we need
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// to make sure that integer types prints as "43" and not "43.0" in
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// all formats, hence this hack.
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func applyMarshalTypes(m map[string]any) {
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for k, v := range m {
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switch t := v.(type) {
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case map[string]any:
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applyMarshalTypes(t)
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case float64:
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i := int64(t)
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if t == float64(i) {
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m[k] = i
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}
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}
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}
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}
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func toFormatMark(format string) (metadecoders.Format, error) {
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if f := metadecoders.FormatFromString(format); f != "" {
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return f, nil
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}
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return "", errors.New("failed to detect target data serialization format")
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}
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