forked from kubernetes-sigs/kustomize
/
setters.go
66 lines (58 loc) · 1.84 KB
/
setters.go
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package filtersutil
import (
"sigs.k8s.io/kustomize/kyaml/yaml"
)
// SetFn is a function that accepts an RNode to possibly modify.
type SetFn func(*yaml.RNode) error
// SetScalar returns a SetFn to set a scalar value
func SetScalar(value string) SetFn {
return func(node *yaml.RNode) error {
return node.PipeE(yaml.FieldSetter{StringValue: value})
}
}
// SetEntry returns a SetFn to set an entry in a map
func SetEntry(key, value, tag string) SetFn {
n := &yaml.Node{
Kind: yaml.ScalarNode,
Value: value,
Tag: tag,
}
return func(node *yaml.RNode) error {
return node.PipeE(yaml.FieldSetter{
Name: key,
Value: yaml.NewRNode(n),
})
}
}
type TrackableSetter struct {
// SetValueCallback will be invoked each time a field is set
setValueCallback func(key, value, tag string, node *yaml.RNode)
}
// WithMutationTracker registers a callback which will be invoked each time a field is mutated
func (s *TrackableSetter) WithMutationTracker(callback func(key, value, tag string, node *yaml.RNode)) {
s.setValueCallback = callback
}
// SetScalar returns a SetFn to set a scalar value
// if a mutation tracker has been registered, the tracker will be invoked each
// time a scalar is set
func (s TrackableSetter) SetScalar(value string) SetFn {
origSetScalar := SetScalar(value)
return func(node *yaml.RNode) error {
if s.setValueCallback != nil {
s.setValueCallback("", value, "", node)
}
return origSetScalar(node)
}
}
// SetEntry returns a SetFn to set an entry in a map
// if a mutation tracker has been registered, the tracker will be invoked each
// time an entry is set
func (s TrackableSetter) SetEntry(key, value, tag string) SetFn {
origSetEntry := SetEntry(key, value, tag)
return func(node *yaml.RNode) error {
if s.setValueCallback != nil {
s.setValueCallback(key, value, tag, node)
}
return origSetEntry(node)
}
}