replacement

Documentation

Overview

Package replacement contains a kio.Filter implementation of the kustomize replacement transformer (accepts sources and looks for targets to replace their values with values from the sources).

Index

• type Filter
  • func (f Filter) Filter(nodes []*yaml.RNode) ([]*yaml.RNode, error)

Examples

• Filter

Types

type Filter

type Filter struct {
	Replacements []types.Replacement `json:"replacements,omitempty" yaml:"replacements,omitempty"`
}

Example

f := Filter{}
err := yaml.Unmarshal([]byte(`
replacements:
- source:
    kind: Foo2
    fieldPath: spec.replicas
  targets:
  - select:
      kind: Foo1
    fieldPaths: 
    - spec.replicas`), &f)
if err != nil {
	log.Fatal(err)
}

err = kio.Pipeline{
	Inputs: []kio.Reader{&kio.ByteReader{Reader: bytes.NewBufferString(`
apiVersion: example.com/v1
kind: Foo1
metadata:
  name: instance
spec:
  replicas: 3
---
apiVersion: example.com/v1
kind: Foo2
metadata:
  name: instance
spec:
  replicas: 99
`)}},
	Filters: []kio.Filter{f},
	Outputs: []kio.Writer{kio.ByteWriter{Writer: os.Stdout}},
}.Execute()
if err != nil {
	log.Fatal(err)
}

Output:

apiVersion: example.com/v1
kind: Foo1
metadata:
  name: instance
spec:
  replicas: 99
---
apiVersion: example.com/v1
kind: Foo2
metadata:
  name: instance
spec:
  replicas: 99

func (Filter) Filter

func (f Filter) Filter(nodes []*yaml.RNode) ([]*yaml.RNode, error)

Filter replaces values of targets with values from sources