yq/pkg/yqlib/operator_encoder.go

41 lines
1.1 KiB
Go

package yqlib
import (
"bufio"
"bytes"
"container/list"
"gopkg.in/yaml.v3"
)
func yamlToString(candidate *CandidateNode, prefs encoderPreferences) (string, error) {
var output bytes.Buffer
printer := NewPrinter(bufio.NewWriter(&output), prefs.format, true, false, 2, true)
elMap := list.New()
elMap.PushBack(candidate)
err := printer.PrintResults(elMap)
return output.String(), err
}
type encoderPreferences struct {
format PrinterOutputFormat
}
/* encodes object as yaml string */
func encodeOperator(d *dataTreeNavigator, context Context, expressionNode *ExpressionNode) (Context, error) {
preferences := expressionNode.Operation.Preferences.(encoderPreferences)
var results = list.New()
for el := context.MatchingNodes.Front(); el != nil; el = el.Next() {
candidate := el.Value.(*CandidateNode)
stringValue, err := yamlToString(candidate, preferences)
if err != nil {
return Context{}, err
}
stringContentNode := &yaml.Node{Kind: yaml.ScalarNode, Tag: "!!str", Value: stringValue}
results.PushBack(candidate.CreateChild(nil, stringContentNode))
}
return context.ChildContext(results), nil
}