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// Copyright 2019 The Kubernetes Authors.
// SPDX-License-Identifier: Apache-2.0
package patchstrategicmerge
import (
"sigs.k8s.io/kustomize/kyaml/kio"
"sigs.k8s.io/kustomize/kyaml/yaml"
"sigs.k8s.io/kustomize/kyaml/yaml/merge2"
)
type Filter struct {
Patch *yaml.RNode
}
var _ kio.Filter = Filter{}
// Filter does a strategic merge patch, which can delete nodes.
func (pf Filter) Filter(nodes []*yaml.RNode) ([]*yaml.RNode, error) {
var result []*yaml.RNode
for i := range nodes {
r, err := merge2.Merge(
pf.Patch, nodes[i],
yaml.MergeOptions{
ListIncreaseDirection: yaml.MergeOptionsListPrepend,
},
)
if err != nil {
return nil, err
}
if r != nil {
result = append(result, r)
}
}
return result, nil
}
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