mirror of
https://github.com/ceph/ceph-csi.git
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124 lines
3.4 KiB
Go
124 lines
3.4 KiB
Go
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/*
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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 client
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import (
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jsonpatch "github.com/evanphx/json-patch"
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"k8s.io/apimachinery/pkg/runtime"
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"k8s.io/apimachinery/pkg/types"
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"k8s.io/apimachinery/pkg/util/json"
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)
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var (
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// Apply uses server-side apply to patch the given object.
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Apply = applyPatch{}
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// Merge uses the raw object as a merge patch, without modifications.
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// Use MergeFrom if you wish to compute a diff instead.
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Merge = mergePatch{}
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)
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type patch struct {
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patchType types.PatchType
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data []byte
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}
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// Type implements Patch.
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func (s *patch) Type() types.PatchType {
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return s.patchType
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}
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// Data implements Patch.
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func (s *patch) Data(obj runtime.Object) ([]byte, error) {
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return s.data, nil
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}
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// RawPatch constructs a new Patch with the given PatchType and data.
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func RawPatch(patchType types.PatchType, data []byte) Patch {
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return &patch{patchType, data}
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}
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// ConstantPatch constructs a new Patch with the given PatchType and data.
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//
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// Deprecated: use RawPatch instead
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func ConstantPatch(patchType types.PatchType, data []byte) Patch {
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return RawPatch(patchType, data)
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}
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type mergeFromPatch struct {
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from runtime.Object
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}
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// Type implements patch.
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func (s *mergeFromPatch) Type() types.PatchType {
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return types.MergePatchType
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}
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// Data implements Patch.
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func (s *mergeFromPatch) Data(obj runtime.Object) ([]byte, error) {
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originalJSON, err := json.Marshal(s.from)
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if err != nil {
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return nil, err
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}
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modifiedJSON, err := json.Marshal(obj)
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if err != nil {
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return nil, err
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}
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return jsonpatch.CreateMergePatch(originalJSON, modifiedJSON)
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}
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// MergeFrom creates a Patch that patches using the merge-patch strategy with the given object as base.
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func MergeFrom(obj runtime.Object) Patch {
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return &mergeFromPatch{obj}
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}
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// mergePatch uses a raw merge strategy to patch the object.
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type mergePatch struct{}
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// Type implements Patch.
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func (p mergePatch) Type() types.PatchType {
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return types.MergePatchType
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}
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// Data implements Patch.
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func (p mergePatch) Data(obj runtime.Object) ([]byte, error) {
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// NB(directxman12): we might technically want to be using an actual encoder
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// here (in case some more performant encoder is introduced) but this is
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// correct and sufficient for our uses (it's what the JSON serializer in
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// client-go does, more-or-less).
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return json.Marshal(obj)
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}
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// applyPatch uses server-side apply to patch the object.
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type applyPatch struct{}
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// Type implements Patch.
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func (p applyPatch) Type() types.PatchType {
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return types.ApplyPatchType
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}
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// Data implements Patch.
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func (p applyPatch) Data(obj runtime.Object) ([]byte, error) {
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// NB(directxman12): we might technically want to be using an actual encoder
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// here (in case some more performant encoder is introduced) but this is
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// correct and sufficient for our uses (it's what the JSON serializer in
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// client-go does, more-or-less).
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return json.Marshal(obj)
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}
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