mirror of
https://github.com/kubernetes-sigs/kustomize.git
synced 2026-05-18 06:25:20 +00:00
130 lines
4.0 KiB
Go
130 lines
4.0 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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"encoding/json"
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jsonpatch "github.com/evanphx/json-patch"
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"github.com/kubernetes-sigs/kustomize/pkg/resource"
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"k8s.io/apimachinery/pkg/runtime"
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"k8s.io/apimachinery/pkg/util/mergepatch"
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"k8s.io/apimachinery/pkg/util/strategicpatch"
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)
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type conflictDetector interface {
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hasConflict(patch1, patch2 *resource.Resource) (bool, error)
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findConflict(conflictingPatchIdx int, patches []*resource.Resource) (*resource.Resource, error)
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mergePatches(patch1, patch2 *resource.Resource) (*resource.Resource, error)
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}
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type jsonMergePatch struct{}
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var _ conflictDetector = &jsonMergePatch{}
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func newJMPConflictDetector() conflictDetector {
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return &jsonMergePatch{}
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}
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func (jmp *jsonMergePatch) hasConflict(patch1, patch2 *resource.Resource) (bool, error) {
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return mergepatch.HasConflicts(patch1.Object, patch2.Object)
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}
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func (jmp *jsonMergePatch) findConflict(conflictingPatchIdx int, patches []*resource.Resource) (*resource.Resource, error) {
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for i, patch := range patches {
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if i == conflictingPatchIdx {
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continue
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}
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if patches[conflictingPatchIdx].GroupVersionKind() != patch.GroupVersionKind() ||
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patches[conflictingPatchIdx].GetName() != patch.GetName() {
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continue
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}
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conflict, err := mergepatch.HasConflicts(patch.Object, patches[conflictingPatchIdx].Object)
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if err != nil {
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return nil, err
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}
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if conflict {
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return patch, nil
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}
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}
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return nil, nil
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}
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func (jmp *jsonMergePatch) mergePatches(patch1, patch2 *resource.Resource) (*resource.Resource, error) {
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var merged resource.Resource
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var mergedMap map[string]interface{}
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baseBytes, err := json.Marshal(patch1.Object)
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if err != nil {
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return nil, err
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}
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patchBytes, err := json.Marshal(patch2.Object)
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if err != nil {
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return nil, err
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}
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mergedBytes, err := jsonpatch.MergeMergePatches(baseBytes, patchBytes)
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if err != nil {
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return nil, err
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}
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err = json.Unmarshal(mergedBytes, &mergedMap)
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merged.SetUnstructuredContent(mergedMap)
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return &merged, err
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}
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type strategicMergePatch struct {
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lookupPatchMeta strategicpatch.LookupPatchMeta
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}
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var _ conflictDetector = &strategicMergePatch{}
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func newSMPConflictDetector(versionedObj runtime.Object) (conflictDetector, error) {
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lookupPatchMeta, err := strategicpatch.NewPatchMetaFromStruct(versionedObj)
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return &strategicMergePatch{lookupPatchMeta: lookupPatchMeta}, err
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}
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func (smp *strategicMergePatch) hasConflict(patch1, patch2 *resource.Resource) (bool, error) {
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return strategicpatch.MergingMapsHaveConflicts(patch1.Object, patch2.Object, smp.lookupPatchMeta)
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}
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func (smp *strategicMergePatch) findConflict(conflictingPatchIdx int, patches []*resource.Resource) (*resource.Resource, error) {
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for i, patch := range patches {
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if i == conflictingPatchIdx {
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continue
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}
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if patches[conflictingPatchIdx].GroupVersionKind() != patch.GroupVersionKind() ||
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patches[conflictingPatchIdx].GetName() != patch.GetName() {
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continue
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}
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conflict, err := strategicpatch.MergingMapsHaveConflicts(
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patch.Object, patches[conflictingPatchIdx].Object, smp.lookupPatchMeta)
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if err != nil {
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return nil, err
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}
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if conflict {
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return patch, nil
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}
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}
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return nil, nil
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}
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func (smp *strategicMergePatch) mergePatches(patch1, patch2 *resource.Resource) (*resource.Resource, error) {
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merged := resource.Resource{}
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mergeJsonMap, err := strategicpatch.MergeStrategicMergeMapPatchUsingLookupPatchMeta(
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smp.lookupPatchMeta, patch1.Object, patch2.Object)
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merged.SetUnstructuredContent(mergeJsonMap)
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return &merged, err
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}
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