mirror of
https://github.com/kubernetes-sigs/kustomize.git
synced 2026-05-20 22:15:00 +00:00
138 lines
3.8 KiB
Go
138 lines
3.8 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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"github.com/evanphx/json-patch"
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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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"sigs.k8s.io/kustomize/pkg/resource"
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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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rf *resource.Factory
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}
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var _ conflictDetector = &jsonMergePatch{}
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func newJMPConflictDetector(rf *resource.Factory) conflictDetector {
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return &jsonMergePatch{rf: rf}
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}
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func (jmp *jsonMergePatch) hasConflict(
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patch1, patch2 *resource.Resource) (bool, error) {
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return mergepatch.HasConflicts(patch1.Map(), patch2.Map())
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}
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func (jmp *jsonMergePatch) findConflict(
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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].Id().GvknEquals(patch.Id()) {
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continue
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}
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conflict, err := mergepatch.HasConflicts(
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patch.Map(),
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patches[conflictingPatchIdx].Map())
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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(
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patch1, patch2 *resource.Resource) (*resource.Resource, error) {
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baseBytes, err := json.Marshal(patch1.Map())
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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.Map())
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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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mergedMap := make(map[string]interface{})
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err = json.Unmarshal(mergedBytes, &mergedMap)
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return jmp.rf.FromMap(mergedMap), err
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}
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type strategicMergePatch struct {
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lookupPatchMeta strategicpatch.LookupPatchMeta
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rf *resource.Factory
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}
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var _ conflictDetector = &strategicMergePatch{}
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func newSMPConflictDetector(
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versionedObj runtime.Object,
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rf *resource.Factory) (conflictDetector, error) {
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lookupPatchMeta, err := strategicpatch.NewPatchMetaFromStruct(versionedObj)
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return &strategicMergePatch{lookupPatchMeta: lookupPatchMeta, rf: rf}, err
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}
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func (smp *strategicMergePatch) hasConflict(p1, p2 *resource.Resource) (bool, error) {
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return strategicpatch.MergingMapsHaveConflicts(
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p1.Map(), p2.Map(), smp.lookupPatchMeta)
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}
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func (smp *strategicMergePatch) findConflict(
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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].Id().GvknEquals(patch.Id()) {
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continue
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}
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conflict, err := strategicpatch.MergingMapsHaveConflicts(
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patch.Map(),
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patches[conflictingPatchIdx].Map(),
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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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mergeJsonMap, err := strategicpatch.MergeStrategicMergeMapPatchUsingLookupPatchMeta(
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smp.lookupPatchMeta, patch1.Map(), patch2.Map())
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return smp.rf.FromMap(mergeJsonMap), err
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}
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