mirror of https://github.com/kubernetes/kops.git
69 lines
1.7 KiB
Go
69 lines
1.7 KiB
Go
/*
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Copyright 2017 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 kubemanifest
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import (
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"fmt"
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"strings"
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"k8s.io/klog/v2"
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)
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type ImageRemapFunction func(image string) (string, error)
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func (m *Object) RemapImages(mapper ImageRemapFunction) error {
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visitor := &imageRemapVisitor{
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mapper: mapper,
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}
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err := m.accept(visitor)
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if err != nil {
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return err
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}
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return nil
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}
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type imageRemapVisitor struct {
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visitorBase
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mapper ImageRemapFunction
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}
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func (m *imageRemapVisitor) VisitString(path []string, v string, mutator func(string)) error {
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n := len(path)
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if n < 1 || path[n-1] != "image" {
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return nil
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}
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// Deployments/DaemonSets/Jobs/StatefulSets have two image fields
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// - spec.template.spec.containers.[2].image
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// - spec.template.spec.initContainers.[2].image
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if n < 3 || (path[n-3] != "containers" && path[n-3] != "initContainers") {
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klog.Warningf("Skipping likely image field: %s", strings.Join(path, "."))
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return nil
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}
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image := v
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klog.V(4).Infof("Consider image for re-mapping: %q", image)
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remapped, err := m.mapper(v)
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if err != nil {
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return fmt.Errorf("error remapping image %q: %v", image, err)
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}
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if remapped != image {
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mutator(remapped)
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}
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return nil
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}
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