yq/pkg/yqlib/operator_style.go

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package yqlib
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import (
"container/list"
"fmt"
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yaml "gopkg.in/yaml.v3"
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)
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func parseStyle(customStyle string) (yaml.Style, error) {
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if customStyle == "tagged" {
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return yaml.TaggedStyle, nil
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} else if customStyle == "double" {
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return yaml.DoubleQuotedStyle, nil
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} else if customStyle == "single" {
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return yaml.SingleQuotedStyle, nil
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} else if customStyle == "literal" {
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return yaml.LiteralStyle, nil
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} else if customStyle == "folded" {
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return yaml.FoldedStyle, nil
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} else if customStyle == "flow" {
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return yaml.FlowStyle, nil
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} else if customStyle != "" {
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return 0, fmt.Errorf("Unknown style %v", customStyle)
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}
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return 0, nil
}
func assignStyleOperator(d *dataTreeNavigator, context Context, expressionNode *ExpressionNode) (Context, error) {
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log.Debugf("AssignStyleOperator: %v")
var style yaml.Style
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if !expressionNode.Operation.UpdateAssign {
rhs, err := d.GetMatchingNodes(context, expressionNode.Rhs)
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if err != nil {
return Context{}, err
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}
if rhs.MatchingNodes.Front() != nil {
style, err = parseStyle(rhs.MatchingNodes.Front().Value.(*CandidateNode).Node.Value)
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if err != nil {
return Context{}, err
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}
}
}
lhs, err := d.GetMatchingNodes(context, expressionNode.Lhs)
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if err != nil {
return Context{}, err
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}
for el := lhs.MatchingNodes.Front(); el != nil; el = el.Next() {
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candidate := el.Value.(*CandidateNode)
log.Debugf("Setting style of : %v", candidate.GetKey())
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if expressionNode.Operation.UpdateAssign {
rhs, err := d.GetMatchingNodes(context.SingleChildContext(candidate), expressionNode.Rhs)
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if err != nil {
return Context{}, err
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}
if rhs.MatchingNodes.Front() != nil {
style, err = parseStyle(rhs.MatchingNodes.Front().Value.(*CandidateNode).Node.Value)
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if err != nil {
return Context{}, err
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}
}
}
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candidate.Node.Style = style
}
return context, nil
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}
func getStyleOperator(d *dataTreeNavigator, context Context, expressionNode *ExpressionNode) (Context, error) {
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log.Debugf("GetStyleOperator")
var results = list.New()
for el := context.MatchingNodes.Front(); el != nil; el = el.Next() {
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candidate := el.Value.(*CandidateNode)
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var style string
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switch candidate.Node.Style {
case yaml.TaggedStyle:
style = "tagged"
case yaml.DoubleQuotedStyle:
style = "double"
case yaml.SingleQuotedStyle:
style = "single"
case yaml.LiteralStyle:
style = "literal"
case yaml.FoldedStyle:
style = "folded"
case yaml.FlowStyle:
style = "flow"
case 0:
style = ""
default:
style = "<unknown>"
}
node := &yaml.Node{Kind: yaml.ScalarNode, Value: style, Tag: "!!str"}
result := candidate.CreateChild(nil, node)
results.PushBack(result)
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}
return context.ChildContext(results), nil
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}