mirror of
https://github.com/mikefarah/yq.git
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118 lines
2.6 KiB
Go
118 lines
2.6 KiB
Go
package properties
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import (
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"bytes"
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"fmt"
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"io"
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"strconv"
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"strings"
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"github.com/magiconair/properties"
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"github.com/mikefarah/yq/v4/pkg/yqlib"
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)
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type propertiesDecoder struct {
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reader io.Reader
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finished bool
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d yqlib.DataTreeNavigator
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}
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func NewPropertiesDecoder() yqlib.Decoder {
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return &propertiesDecoder{d: yqlib.NewDataTreeNavigator(), finished: false}
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}
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func (dec *propertiesDecoder) Init(reader io.Reader) error {
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dec.reader = reader
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dec.finished = false
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return nil
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}
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func parsePropKey(key string) []interface{} {
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pathStrArray := strings.Split(key, ".")
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path := make([]interface{}, len(pathStrArray))
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for i, pathStr := range pathStrArray {
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num, err := strconv.ParseInt(pathStr, 10, 32)
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if err == nil {
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path[i] = num
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} else {
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path[i] = pathStr
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}
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}
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return path
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}
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func (dec *propertiesDecoder) processComment(c string) string {
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if c == "" {
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return ""
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}
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return "# " + c
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}
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func (dec *propertiesDecoder) applyPropertyComments(context yqlib.Context, path []interface{}, comments []string) error {
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rhsCandidateNode := &yqlib.CandidateNode{
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Tag: "!!str",
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Value: fmt.Sprintf("%v", path[len(path)-1]),
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HeadComment: dec.processComment(strings.Join(comments, "\n")),
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Kind: yqlib.ScalarNode,
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}
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rhsCandidateNode.Tag = rhsCandidateNode.GuessTagFromCustomType()
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return dec.d.DeeplyAssignKey(context, path, rhsCandidateNode)
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}
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func (dec *propertiesDecoder) applyProperty(context yqlib.Context, properties *properties.Properties, key string) error {
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value, _ := properties.Get(key)
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path := parsePropKey(key)
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propertyComments := properties.GetComments(key)
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if len(propertyComments) > 0 {
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err := dec.applyPropertyComments(context, path, propertyComments)
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if err != nil {
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return nil
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}
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}
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rhsNode := yqlib.CreateStringScalarNode(value)
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rhsNode.Tag = rhsNode.GuessTagFromCustomType()
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return dec.d.DeeplyAssign(context, path, rhsNode)
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}
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func (dec *propertiesDecoder) Decode() (*yqlib.CandidateNode, error) {
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if dec.finished {
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return nil, io.EOF
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}
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buf := new(bytes.Buffer)
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if _, err := buf.ReadFrom(dec.reader); err != nil {
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return nil, err
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}
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if buf.Len() == 0 {
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dec.finished = true
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return nil, io.EOF
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}
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properties, err := properties.LoadString(buf.String())
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if err != nil {
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return nil, err
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}
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properties.DisableExpansion = true
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rootMap := &yqlib.CandidateNode{
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Kind: yqlib.MappingNode,
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Tag: "!!map",
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}
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context := yqlib.Context{}
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context = context.SingleChildContext(rootMap)
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for _, key := range properties.Keys() {
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if err := dec.applyProperty(context, properties, key); err != nil {
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return nil, err
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}
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}
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dec.finished = true
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return rootMap, nil
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}
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