mirror of
https://github.com/kubernetes-sigs/kustomize.git
synced 2026-05-18 03:45:12 +00:00
99 lines
2.9 KiB
Go
99 lines
2.9 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/gvk"
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"sigs.k8s.io/kustomize/pkg/resid"
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"sigs.k8s.io/kustomize/pkg/resmap"
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"sigs.k8s.io/kustomize/pkg/transformerconfig"
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)
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// nameReferenceTransformer contains the referencing info between 2 GroupVersionKinds
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type nameReferenceTransformer struct {
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pathConfigs []transformerconfig.ReferencePathConfig
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}
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var _ Transformer = &nameReferenceTransformer{}
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// NewNameReferenceTransformer constructs a nameReferenceTransformer
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// with a given Reference PathConfig slice
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func NewNameReferenceTransformer(pc []transformerconfig.ReferencePathConfig) (Transformer, error) {
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if pc == nil {
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return nil, errors.New("pathConfigs is not expected to be nil")
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}
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return &nameReferenceTransformer{pathConfigs: pc}, nil
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}
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// Transform does the fields update according to pathConfigs.
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// The old name is in the key in the map and the new name is in the object
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// associated with the key. e.g. if <k, v> is one of the key-value pair in the map,
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// then the old name is k.Name and the new name is v.GetName()
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func (o *nameReferenceTransformer) Transform(m resmap.ResMap) error {
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for id := range m {
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objMap := m[id].UnstructuredContent()
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for _, referencePathConfig := range o.pathConfigs {
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for _, path := range referencePathConfig.PathConfigs {
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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,
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o.updateNameReference(referencePathConfig.Gvk, m.FilterBy(id)))
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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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}
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return nil
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}
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func (o *nameReferenceTransformer) updateNameReference(
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k gvk.Gvk, m resmap.ResMap) func(in interface{}) (interface{}, error) {
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return func(in interface{}) (interface{}, error) {
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s, ok := in.(string)
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if !ok {
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return nil, fmt.Errorf("%#v is expectd to be %T", in, s)
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}
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for id, res := range m {
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if !id.Gvk().IsSelected(&k) {
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continue
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}
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if id.Name() == s {
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err := o.detectConflict(id, m, s)
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if err != nil {
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return nil, err
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}
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return res.GetName(), nil
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}
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}
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return in, nil
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}
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}
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func (o *nameReferenceTransformer) detectConflict(id resid.ResId, m resmap.ResMap, name string) error {
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matchedIds := m.FindByGVKN(id)
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if len(matchedIds) > 1 {
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return fmt.Errorf("detected conflicts when resolving name references %s:\n%v", name, matchedIds)
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}
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return nil
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}
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