mirror of https://github.com/mikefarah/yq.git
123 lines
2.5 KiB
Go
123 lines
2.5 KiB
Go
package yqlib
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import (
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"bytes"
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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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"gopkg.in/yaml.v3"
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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 DataTreeNavigator
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}
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func NewPropertiesDecoder() Decoder {
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return &propertiesDecoder{d: NewDataTreeNavigator(), finished: false}
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}
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func (dec *propertiesDecoder) Init(reader io.Reader) {
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dec.reader = reader
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dec.finished = false
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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) applyProperty(properties *properties.Properties, context Context, key string) error {
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value, _ := properties.Get(key)
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path := parsePropKey(key)
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rhsNode := &yaml.Node{
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Value: value,
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Tag: "!!str",
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Kind: yaml.ScalarNode,
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LineComment: dec.processComment(properties.GetComment(key)),
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}
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rhsNode.Tag = guessTagFromCustomType(rhsNode)
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rhsCandidateNode := &CandidateNode{
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Path: path,
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Node: rhsNode,
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}
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assignmentOp := &Operation{OperationType: assignOpType, Preferences: assignPreferences{}}
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rhsOp := &Operation{OperationType: valueOpType, CandidateNode: rhsCandidateNode}
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assignmentOpNode := &ExpressionNode{
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Operation: assignmentOp,
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LHS: createTraversalTree(path, traversePreferences{}, false),
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RHS: &ExpressionNode{Operation: rhsOp},
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}
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_, err := dec.d.GetMatchingNodes(context, assignmentOpNode)
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return err
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}
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func (dec *propertiesDecoder) Decode(rootYamlNode *yaml.Node) error {
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if dec.finished {
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return 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 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 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 err
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}
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properties.DisableExpansion = true
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rootMap := &CandidateNode{
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Node: &yaml.Node{
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Kind: yaml.MappingNode,
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Tag: "!!map",
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},
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}
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context := 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(properties, context, key); err != nil {
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return err
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}
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}
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rootYamlNode.Kind = yaml.DocumentNode
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rootYamlNode.Content = []*yaml.Node{rootMap.Node}
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dec.finished = true
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return nil
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}
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