mirror of https://github.com/k3s-io/k3s
87 lines
2.3 KiB
Go
87 lines
2.3 KiB
Go
/*
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Copyright 2018 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package transformers
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import (
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"errors"
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"fmt"
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"sigs.k8s.io/kustomize/pkg/resmap"
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"sigs.k8s.io/kustomize/pkg/transformers/config"
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)
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// mapTransformer applies a string->string map to fieldSpecs.
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type mapTransformer struct {
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m map[string]string
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fieldSpecs []config.FieldSpec
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}
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var _ Transformer = &mapTransformer{}
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// NewLabelsMapTransformer constructs a mapTransformer.
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func NewLabelsMapTransformer(
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m map[string]string, fs []config.FieldSpec) (Transformer, error) {
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return NewMapTransformer(fs, m)
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}
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// NewAnnotationsMapTransformer construct a mapTransformer.
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func NewAnnotationsMapTransformer(
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m map[string]string, fs []config.FieldSpec) (Transformer, error) {
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return NewMapTransformer(fs, m)
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}
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// NewMapTransformer construct a mapTransformer.
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func NewMapTransformer(
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pc []config.FieldSpec, m map[string]string) (Transformer, error) {
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if m == nil {
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return NewNoOpTransformer(), nil
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}
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if pc == nil {
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return nil, errors.New("fieldSpecs is not expected to be nil")
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}
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return &mapTransformer{fieldSpecs: pc, m: m}, nil
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}
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// Transform apply each <key, value> pair in the mapTransformer to the
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// fields specified in mapTransformer.
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func (o *mapTransformer) Transform(m resmap.ResMap) error {
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for id := range m {
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objMap := m[id].Map()
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for _, path := range o.fieldSpecs {
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if !id.Gvk().IsSelected(&path.Gvk) {
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continue
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}
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err := mutateField(objMap, path.PathSlice(), path.CreateIfNotPresent, o.addMap)
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if err != nil {
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return err
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}
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}
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}
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return nil
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}
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func (o *mapTransformer) addMap(in interface{}) (interface{}, error) {
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m, ok := in.(map[string]interface{})
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if !ok {
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return nil, fmt.Errorf("%#v is expected to be %T", in, m)
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}
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for k, v := range o.m {
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m[k] = v
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}
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return m, nil
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}
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