mirror of
https://github.com/mikefarah/yq.git
synced 2024-11-12 13:48:06 +00:00
93 lines
2.6 KiB
Go
93 lines
2.6 KiB
Go
package yqlib
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import (
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"container/list"
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"fmt"
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yaml "gopkg.in/yaml.v3"
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)
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func deleteChildOperator(d *dataTreeNavigator, context Context, expressionNode *ExpressionNode) (Context, error) {
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nodesToDelete, err := d.GetMatchingNodes(context.ReadOnlyClone(), expressionNode.RHS)
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if err != nil {
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return Context{}, err
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}
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//need to iterate backwards to ensure correct indices when deleting multiple
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for el := nodesToDelete.MatchingNodes.Back(); el != nil; el = el.Prev() {
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candidate := el.Value.(*CandidateNode)
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if candidate.Node.Kind == yaml.DocumentNode {
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//need to delete this node from context.
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newResults := list.New()
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for item := context.MatchingNodes.Front(); item != nil; item = item.Next() {
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nodeInContext := item.Value.(*CandidateNode)
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if nodeInContext.Node != candidate.Node {
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newResults.PushBack(nodeInContext)
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} else {
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log.Info("Need to delete this %v", NodeToString(nodeInContext))
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}
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}
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return context.ChildContext(newResults), nil
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} else if candidate.Parent == nil {
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//problem: context may already be '.a' and then I pass in '.a.a2'.
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// should pass in .a2.
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log.Info("Could not find parent of %v", NodeToString(candidate))
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return context, nil
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}
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parentNode := candidate.Parent.Node
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childPath := candidate.Path[len(candidate.Path)-1]
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if parentNode.Kind == yaml.MappingNode {
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deleteFromMap(candidate.Parent, childPath)
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} else if parentNode.Kind == yaml.SequenceNode {
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deleteFromArray(candidate.Parent, childPath)
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} else {
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return Context{}, fmt.Errorf("Cannot delete nodes from parent of tag %v", parentNode.Tag)
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}
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}
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return context, nil
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}
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func deleteFromMap(candidate *CandidateNode, childPath interface{}) {
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log.Debug("deleteFromMap")
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node := unwrapDoc(candidate.Node)
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contents := node.Content
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newContents := make([]*yaml.Node, 0)
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for index := 0; index < len(contents); index = index + 2 {
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key := contents[index]
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value := contents[index+1]
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childCandidate := candidate.CreateChildInMap(key, value)
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shouldDelete := key.Value == childPath
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log.Debugf("shouldDelete %v ? %v", childCandidate.GetKey(), shouldDelete)
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if !shouldDelete {
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newContents = append(newContents, key, value)
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}
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}
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node.Content = newContents
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}
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func deleteFromArray(candidate *CandidateNode, childPath interface{}) {
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log.Debug("deleteFromArray")
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node := unwrapDoc(candidate.Node)
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contents := node.Content
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newContents := make([]*yaml.Node, 0)
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for index := 0; index < len(contents); index = index + 1 {
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value := contents[index]
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shouldDelete := fmt.Sprintf("%v", index) == fmt.Sprintf("%v", childPath)
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if !shouldDelete {
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newContents = append(newContents, value)
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}
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}
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node.Content = newContents
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}
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