mirror of
https://github.com/mikefarah/yq.git
synced 2024-12-19 20:19:04 +00:00
92 lines
2.9 KiB
Go
92 lines
2.9 KiB
Go
package yqlib
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import (
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"bufio"
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"bytes"
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"container/list"
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"regexp"
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"strings"
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"gopkg.in/yaml.v3"
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)
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func yamlToString(candidate *CandidateNode, prefs encoderPreferences) (string, error) {
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var output bytes.Buffer
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log.Debug("printing with indent: %v", prefs.indent)
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printer := NewPrinterWithSingleWriter(bufio.NewWriter(&output), prefs.format, true, false, prefs.indent, true)
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err := printer.PrintResults(candidate.AsList())
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return output.String(), err
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}
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type encoderPreferences struct {
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format PrinterOutputFormat
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indent int
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}
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/* encodes object as yaml string */
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func encodeOperator(d *dataTreeNavigator, context Context, expressionNode *ExpressionNode) (Context, error) {
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preferences := expressionNode.Operation.Preferences.(encoderPreferences)
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var results = list.New()
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hasOnlyOneNewLine := regexp.MustCompile("[^\n].*\n$")
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endWithNewLine := regexp.MustCompile(".*\n$")
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chomper := regexp.MustCompile("\n+$")
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for el := context.MatchingNodes.Front(); el != nil; el = el.Next() {
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candidate := el.Value.(*CandidateNode)
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stringValue, err := yamlToString(candidate, preferences)
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if err != nil {
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return Context{}, err
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}
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// remove trailing newlines if needed.
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// check if we originally decoded this path, and the original thing had a single line.
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originalList := context.GetVariable("decoded: " + candidate.GetKey())
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if originalList != nil && originalList.Len() > 0 && hasOnlyOneNewLine.MatchString(stringValue) {
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original := originalList.Front().Value.(*CandidateNode)
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originalNode := unwrapDoc(original.Node)
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// original block did not have a new line at the end, get rid of this one too
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if !endWithNewLine.MatchString(originalNode.Value) {
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stringValue = chomper.ReplaceAllString(stringValue, "")
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}
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}
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// dont print a new line when printing json on a single line.
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if preferences.format == JsonOutputFormat && preferences.indent == 0 {
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stringValue = chomper.ReplaceAllString(stringValue, "")
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}
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stringContentNode := &yaml.Node{Kind: yaml.ScalarNode, Tag: "!!str", Value: stringValue}
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results.PushBack(candidate.CreateChild(nil, stringContentNode))
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}
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return context.ChildContext(results), nil
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}
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/* takes a string and decodes it back into an object */
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func decodeOperator(d *dataTreeNavigator, context Context, expressionNode *ExpressionNode) (Context, error) {
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var results = list.New()
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for el := context.MatchingNodes.Front(); el != nil; el = el.Next() {
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candidate := el.Value.(*CandidateNode)
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context.SetVariable("decoded: "+candidate.GetKey(), candidate.AsList())
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var dataBucket yaml.Node
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log.Debugf("got: [%v]", candidate.Node.Value)
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decoder := yaml.NewDecoder(strings.NewReader(unwrapDoc(candidate.Node).Value))
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errorReading := decoder.Decode(&dataBucket)
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if errorReading != nil {
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return Context{}, errorReading
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}
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//first node is a doc
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node := unwrapDoc(&dataBucket)
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results.PushBack(candidate.CreateChild(nil, node))
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}
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return context.ChildContext(results), nil
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}
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