Remove legacy code from ReplacementTransformer
Change-Id: Ia247ee15efd5f66b5e36cf49339474548d94765d
This commit is contained in:
Dmitry Ukov
parent
0d036ba097
commit
96cbb045a4
@ -3,6 +3,10 @@ apiVersion: airshipit.org/v1alpha1
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kind: ReplacementTransformer
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metadata:
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name: baremetal-operator-env-vars-replacements
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annotations:
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config.kubernetes.io/function: |-
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container:
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image: quay.io/airshipit/replacement-transformer:dev
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replacements:
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# Replace the proxy vars
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- source:
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@ -3,6 +3,10 @@ apiVersion: airshipit.org/v1alpha1
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kind: ReplacementTransformer
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metadata:
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name: baremetal-operator-networking-replacements
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annotations:
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config.kubernetes.io/function: |-
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container:
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image: quay.io/airshipit/replacement-transformer:dev
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replacements:
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# Replace the pod & service networks
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- source:
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@ -2,6 +2,10 @@ apiVersion: airshipit.org/v1alpha1
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kind: ReplacementTransformer
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metadata:
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name: calico-v3-versions-replacements
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annotations:
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config.kubernetes.io/function: |-
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container:
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image: quay.io/airshipit/replacement-transformer:dev
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replacements:
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- source:
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objref:
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@ -3,6 +3,10 @@ apiVersion: airshipit.org/v1alpha1
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kind: ReplacementTransformer
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metadata:
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name: ephemeral-env-vars-replacements
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annotations:
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config.kubernetes.io/function: |-
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container:
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image: quay.io/airshipit/replacement-transformer:dev
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replacements:
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# Replace the proxy vars
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- source:
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@ -3,6 +3,10 @@ apiVersion: airshipit.org/v1alpha1
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kind: ReplacementTransformer
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metadata:
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name: ephemeral-networking-replacements
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annotations:
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config.kubernetes.io/function: |-
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container:
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image: quay.io/airshipit/replacement-transformer:dev
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replacements:
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# Substring-replace the ephemeral control plane's info
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- source:
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@ -2,6 +2,10 @@ apiVersion: airshipit.org/v1alpha1
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kind: ReplacementTransformer
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metadata:
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name: helm-operator-versions-replacements
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annotations:
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config.kubernetes.io/function: |-
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container:
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image: quay.io/airshipit/replacement-transformer:dev
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replacements:
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- source:
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objref:
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@ -2,6 +2,10 @@ apiVersion: airshipit.org/v1alpha1
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kind: ReplacementTransformer
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metadata:
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name: hwcc-versions-replacements
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annotations:
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config.kubernetes.io/function: |-
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container:
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image: quay.io/airshipit/replacement-transformer:dev
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replacements:
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- source:
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objref:
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@ -3,6 +3,10 @@ apiVersion: airshipit.org/v1alpha1
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kind: ReplacementTransformer
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metadata:
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name: k8scontrol-env-vars-replacements
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annotations:
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config.kubernetes.io/function: |-
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container:
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image: quay.io/airshipit/replacement-transformer:dev
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replacements:
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# Replace the proxy vars
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- source:
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@ -8,6 +8,10 @@ apiVersion: airshipit.org/v1alpha1
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kind: ReplacementTransformer
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metadata:
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name: k8scontrol-networking-replacements
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annotations:
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config.kubernetes.io/function: |-
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container:
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image: quay.io/airshipit/replacement-transformer:dev
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replacements:
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# Replace the pod & service networks
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- source:
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@ -22,23 +22,6 @@ import (
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"sigs.k8s.io/kustomize/api/types"
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)
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// ErrTypeMismatch is returned for type conversion errors. This error
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// is raised if JSON path element points to a wrong data structure e.g.
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// JSON path 'a.b[x=y]c' considers that there is a list of maps under key 'b'
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// therefore ErrTypeMismatch will be returned for following structure
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//
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// a:
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// b:
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// - 'some string'
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type ErrTypeMismatch struct {
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Actual interface{}
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Expectation string
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}
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func (e ErrTypeMismatch) Error() string {
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return fmt.Sprintf("%#v %s", e.Actual, e.Expectation)
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}
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// ErrBadConfiguration returned in case of plugin misconfiguration
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type ErrBadConfiguration struct {
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Msg string
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@ -94,15 +77,6 @@ func (e ErrIndexOutOfBound) Error() string {
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return fmt.Sprintf("array index out of bounds: index %d, length %d", e.Index, e.Length)
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}
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// ErrValueNotFound returned if value specified in fieldRef option was not found
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type ErrValueNotFound struct {
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ID string
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}
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func (e ErrValueNotFound) Error() string {
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return fmt.Sprintf("unable to find value identified by %s", e.ID)
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}
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func printFields(objRef interface{}) string {
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val := reflect.ValueOf(objRef).Elem()
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valType := val.Type()
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@ -1,39 +1,39 @@
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// Copyright 2019 The Kubernetes Authors.
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// SPDX-License-Identifier: Apache-2.0
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/*
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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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https://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 replacement
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import (
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"fmt"
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"io"
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"io/ioutil"
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"reflect"
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"regexp"
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"strconv"
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"strings"
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"k8s.io/apimachinery/pkg/runtime"
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"sigs.k8s.io/kustomize/api/k8sdeps/kunstruct"
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"sigs.k8s.io/kustomize/api/resmap"
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"sigs.k8s.io/kustomize/api/resource"
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"sigs.k8s.io/kustomize/api/types"
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"sigs.k8s.io/kustomize/kyaml/yaml"
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airshipv1 "opendev.org/airship/airshipctl/pkg/api/v1alpha1"
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"opendev.org/airship/airshipctl/pkg/document/plugin/kyamlutils"
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plugtypes "opendev.org/airship/airshipctl/pkg/document/plugin/types"
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"opendev.org/airship/airshipctl/pkg/errors"
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)
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var (
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pattern = regexp.MustCompile(`(\S+)\[(\S+)=(\S+)\]`)
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// substring substitutions are appended to paths as: ...%VARNAME%
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substringPatternRegex = regexp.MustCompile(`(.+)%(\S+)%$`)
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)
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const (
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dotReplacer = "$$$$"
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)
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var _ plugtypes.Plugin = &plugin{}
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type plugin struct {
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@ -63,56 +63,7 @@ func New(obj map[string]interface{}) (plugtypes.Plugin, error) {
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}
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func (p *plugin) Run(in io.Reader, out io.Writer) error {
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data, err := ioutil.ReadAll(in)
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if err != nil {
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return err
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}
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kf := kunstruct.NewKunstructuredFactoryImpl()
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rf := resource.NewFactory(kf)
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resources, err := rf.SliceFromBytes(data)
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if err != nil {
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return err
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}
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rm := resmap.New()
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for _, r := range resources {
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if err = rm.Append(r); err != nil {
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return err
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}
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}
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if err = p.Transform(rm); err != nil {
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return err
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}
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result, err := rm.AsYaml()
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if err != nil {
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return err
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}
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fmt.Fprint(out, string(result))
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return nil
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}
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// Transform resources using configured replacements
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func (p *plugin) Transform(m resmap.ResMap) error {
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var err error
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for _, r := range p.Replacements {
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var replacement interface{}
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if r.Source.ObjRef != nil {
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replacement, err = getReplacement(m, r.Source.ObjRef, r.Source.FieldRef)
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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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if r.Source.Value != "" {
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replacement = r.Source.Value
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}
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if err = substitute(m, r.Target, replacement); err != nil {
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return err
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}
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}
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return nil
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return errors.ErrNotImplemented{What: "ReplacementTransformer method Run is deprecated and will be removed"}
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}
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func (p *plugin) Filter(items []*yaml.RNode) ([]*yaml.RNode, error) {
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@ -229,256 +180,3 @@ func substituteSubstring(tgt *yaml.RNode, fieldRef, substringPattern string, val
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}
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return nil
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}
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func getReplacement(m resmap.ResMap, objRef *types.Target, fieldRef string) (interface{}, error) {
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s := types.Selector{
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Gvk: objRef.Gvk,
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Name: objRef.Name,
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Namespace: objRef.Namespace,
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}
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resources, err := m.Select(s)
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if err != nil {
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return nil, err
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}
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if len(resources) > 1 {
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resList := make([]string, len(resources))
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for i := range resources {
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resList[i] = resources[i].String()
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}
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return nil, ErrMultipleResources{ObjRef: objRef}
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}
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if len(resources) == 0 {
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return nil, ErrSourceNotFound{ObjRef: objRef}
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}
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if fieldRef == "" {
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fieldRef = "metadata.name"
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}
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return resources[0].GetFieldValue(fieldRef)
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}
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func substitute(m resmap.ResMap, to *types.ReplTarget, replacement interface{}) error {
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resources, err := m.Select(*to.ObjRef)
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if err != nil {
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return err
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}
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if len(resources) == 0 {
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return ErrTargetNotFound{ObjRef: to.ObjRef}
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}
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for _, r := range resources {
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for _, p := range to.FieldRefs {
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// TODO (dukov) rework this using k8s.io/client-go/util/jsonpath
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parts := strings.Split(p, "[")
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var tmp []string
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for _, part := range parts {
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if strings.Contains(part, "]") {
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filter := strings.Split(part, "]")
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filter[0] = strings.ReplaceAll(filter[0], ".", dotReplacer)
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part = strings.Join(filter, "]")
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}
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tmp = append(tmp, part)
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}
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p = strings.Join(tmp, "[")
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// Exclude substring portion from dot replacer
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// substring can contain IP or any dot separated string
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substringPattern := ""
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p, substringPattern = extractSubstringPattern(p)
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pathSlice := strings.Split(p, ".")
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// append back the extracted substring
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if len(substringPattern) > 0 {
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pathSlice[len(pathSlice)-1] = pathSlice[len(pathSlice)-1] + "%" +
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substringPattern + "%"
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}
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for i, part := range pathSlice {
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pathSlice[i] = strings.ReplaceAll(part, dotReplacer, ".")
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}
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if err := updateField(r.Map(), pathSlice, replacement); err != nil {
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return err
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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 getFirstPathSegment(path string) (field string, key string, value string, isArray bool) {
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groups := pattern.FindStringSubmatch(path)
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if len(groups) != 4 {
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return path, "", "", false
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}
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return groups[1], groups[2], groups[3], groups[2] != ""
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}
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func updateField(m interface{}, pathToField []string, replacement interface{}) error {
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if len(pathToField) == 0 {
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return nil
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}
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switch typedM := m.(type) {
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case map[string]interface{}:
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return updateMapField(typedM, pathToField, replacement)
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case []interface{}:
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return updateSliceField(typedM, pathToField, replacement)
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default:
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return ErrTypeMismatch{Actual: typedM, Expectation: "is not expected be a primitive type"}
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}
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}
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// Extract the substring pattern (if present) from the target path spec
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func extractSubstringPattern(path string) (extractedPath string, substringPattern string) {
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groups := substringPatternRegex.FindStringSubmatch(path)
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if len(groups) != 3 {
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return path, ""
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}
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return groups[1], groups[2]
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}
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// replaces substring in a string if pattern applies
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func processString(field string, substringPattern string, replacement string) string {
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pattern := regexp.MustCompile(substringPattern)
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return pattern.ReplaceAllString(field, replacement)
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}
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// replaces substring in any string in the array if pattern applies
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func processArray(tgt []string, pattern string, replacement string) []string {
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result := make([]string, 0, len(tgt))
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for _, field := range tgt {
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result = append(result, processString(field, pattern, replacement))
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}
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return result
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}
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// converts array of interfaces to array of strings
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func convertToStrings(iFaces []interface{}) ([]string, bool) {
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result := []string{}
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for _, val := range iFaces {
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if str, ok := val.(string); ok {
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result = append(result, str)
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}
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}
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return result, (len(result) != 0)
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}
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// apply a substring substitution based on a pattern
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func applySubstringPattern(target interface{}, replacement interface{},
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substringPattern string) (regexedReplacement interface{}, err error) {
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// no regex'ing needed if there is no substringPattern
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if substringPattern == "" {
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return replacement, nil
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}
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// if replacement is numeric, convert it to a string for the sake of
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// substring substitution.
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var replacementString string
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switch t := replacement.(type) {
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case uint, uint8, uint16, uint32, uint64, int, int8, int16, int32, int64:
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replacementString = fmt.Sprint(t)
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case string:
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replacementString = t
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default:
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return nil, ErrPatternSubstring{Msg: "pattern-based substitution can only be applied " +
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"with string or numeric replacement values"}
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}
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switch reflect.TypeOf(target).Kind() {
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case reflect.String:
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return processString(target.(string), substringPattern, replacementString), nil
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case reflect.Slice:
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if ifaceArray, ok := target.([]interface{}); ok {
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if strArray, ok := convertToStrings(ifaceArray); ok {
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return processArray(strArray, substringPattern, replacementString), nil
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}
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}
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if strArray, ok := target.([]string); ok {
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return processArray(strArray, substringPattern, replacementString), nil
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}
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}
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return nil, ErrPatternSubstring{
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Msg: "pattern-based substitution can only be applied to string " +
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"or array of strings target fields",
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}
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}
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func updateMapField(m map[string]interface{}, pathToField []string, replacement interface{}) error {
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path, key, value, isArray := getFirstPathSegment(pathToField[0])
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path, substringPattern := extractSubstringPattern(path)
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v, found := m[path]
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if !found {
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m[path] = make(map[string]interface{})
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v = m[path]
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}
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if v == nil {
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return ErrTypeMismatch{Actual: v, Expectation: "is not expected be nil"}
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}
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if len(pathToField) == 1 {
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if !isArray {
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renderedRepl, err := applySubstringPattern(m[path], replacement, substringPattern)
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if err != nil {
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return err
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}
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m[path] = renderedRepl
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return nil
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}
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switch typedV := v.(type) {
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case []interface{}:
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for i, item := range typedV {
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typedItem, ok := item.(map[string]interface{})
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if !ok {
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return ErrTypeMismatch{Actual: item, Expectation: fmt.Sprintf("is expected to be %T", typedItem)}
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}
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if actualValue, ok := typedItem[key]; ok {
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if value == actualValue {
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typedV[i] = replacement
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return nil
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}
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}
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}
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default:
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return ErrTypeMismatch{Actual: typedV, Expectation: "is not expected be a primitive type"}
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}
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}
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|
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if isArray {
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return updateField(v, pathToField, replacement)
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}
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return updateField(v, pathToField[1:], replacement)
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}
|
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|
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func updateSliceField(m []interface{}, pathToField []string, replacement interface{}) error {
|
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if len(pathToField) == 0 {
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return nil
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}
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_, key, value, isArray := getFirstPathSegment(pathToField[0])
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|
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if isArray {
|
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for _, item := range m {
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typedItem, ok := item.(map[string]interface{})
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if !ok {
|
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return ErrTypeMismatch{Actual: item, Expectation: fmt.Sprintf("is expected to be %T", typedItem)}
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}
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if actualValue, ok := typedItem[key]; ok {
|
||||
if value == actualValue {
|
||||
return updateField(typedItem, pathToField[1:], replacement)
|
||||
}
|
||||
}
|
||||
}
|
||||
return nil
|
||||
}
|
||||
|
||||
index, err := strconv.Atoi(pathToField[0])
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
if len(m) < index || index < 0 {
|
||||
return ErrIndexOutOfBound{Index: index, Length: len(m)}
|
||||
}
|
||||
if len(pathToField) == 1 {
|
||||
m[index] = replacement
|
||||
return nil
|
||||
}
|
||||
return updateField(m[index], pathToField[1:], replacement)
|
||||
}
|
||||
|
||||
@ -1,12 +1,22 @@
|
||||
// Copyright 2019 The Kubernetes Authors.
|
||||
// SPDX-License-Identifier: Apache-2.0
|
||||
/*
|
||||
Licensed under the Apache License, Version 2.0 (the "License");
|
||||
you may not use this file except in compliance with the License.
|
||||
You may obtain a copy of the License at
|
||||
|
||||
https://www.apache.org/licenses/LICENSE-2.0
|
||||
|
||||
Unless required by applicable law or agreed to in writing, software
|
||||
distributed under the License is distributed on an "AS IS" BASIS,
|
||||
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||||
See the License for the specific language governing permissions and
|
||||
limitations under the License.
|
||||
*/
|
||||
|
||||
package replacement_test
|
||||
|
||||
import (
|
||||
"bytes"
|
||||
"fmt"
|
||||
"strings"
|
||||
"testing"
|
||||
|
||||
"github.com/stretchr/testify/assert"
|
||||
@ -16,62 +26,8 @@ import (
|
||||
"sigs.k8s.io/yaml"
|
||||
|
||||
"opendev.org/airship/airshipctl/pkg/document/plugin/replacement"
|
||||
plugtypes "opendev.org/airship/airshipctl/pkg/document/plugin/types"
|
||||
)
|
||||
|
||||
func samplePlugin(t *testing.T) plugtypes.Plugin {
|
||||
cfg := make(map[string]interface{})
|
||||
conf := `
|
||||
apiVersion: airshipit.org/v1alpha1
|
||||
kind: ReplacementTransformer
|
||||
metadata:
|
||||
name: notImportantHere
|
||||
replacements:
|
||||
- source:
|
||||
value: nginx:newtag
|
||||
target:
|
||||
objref:
|
||||
kind: Deployment
|
||||
fieldrefs:
|
||||
- spec.template.spec.containers[name=nginx-latest].image`
|
||||
|
||||
err := yaml.Unmarshal([]byte(conf), &cfg)
|
||||
require.NoError(t, err)
|
||||
plugin, err := replacement.New(cfg)
|
||||
require.NoError(t, err)
|
||||
return plugin
|
||||
}
|
||||
|
||||
func TestMalformedInput(t *testing.T) {
|
||||
plugin := samplePlugin(t)
|
||||
err := plugin.Run(strings.NewReader("--"), &bytes.Buffer{})
|
||||
assert.Error(t, err)
|
||||
}
|
||||
|
||||
func TestDuplicatedResources(t *testing.T) {
|
||||
plugin := samplePlugin(t)
|
||||
err := plugin.Run(strings.NewReader(`
|
||||
apiVersion: v1
|
||||
kind: Pod
|
||||
metadata:
|
||||
name: pod
|
||||
spec:
|
||||
containers:
|
||||
- name: myapp-container
|
||||
image: busybox
|
||||
---
|
||||
apiVersion: v1
|
||||
kind: Pod
|
||||
metadata:
|
||||
name: pod
|
||||
spec:
|
||||
containers:
|
||||
- name: myapp-container
|
||||
image: busybox
|
||||
`), &bytes.Buffer{})
|
||||
assert.Error(t, err)
|
||||
}
|
||||
|
||||
var testCases = []struct {
|
||||
cfg string
|
||||
in string
|
||||
@ -804,7 +760,8 @@ spec:
|
||||
containers:
|
||||
- name: myapp-container
|
||||
image: busybox`,
|
||||
expectedErr: `"some string value" is not expected be a primitive type`,
|
||||
expectedErr: "wrong Node Kind for labels.somelabel expected: " +
|
||||
"MappingNode was ScalarNode: value: {'some string value'}",
|
||||
},
|
||||
{
|
||||
cfg: `
|
||||
@ -843,7 +800,8 @@ spec:
|
||||
containers:
|
||||
- name: myapp-container
|
||||
image: busybox`,
|
||||
expectedErr: `"some string value" is not expected be a primitive type`,
|
||||
expectedErr: "wrong Node Kind for labels.somelabel expected: " +
|
||||
"SequenceNode was ScalarNode: value: {'some string value'}",
|
||||
},
|
||||
{
|
||||
cfg: `
|
||||
@ -882,9 +840,8 @@ spec:
|
||||
containers:
|
||||
- name: myapp-container
|
||||
image: busybox`,
|
||||
expectedErr: "map[string]interface {}{\"containers\":[]interface " +
|
||||
"{}{map[string]interface {}{\"image\":\"busybox\", \"name\":\"myapp-container\"}}} " +
|
||||
"is not expected be a primitive type",
|
||||
expectedErr: "wrong Node Kind for spec expected: " +
|
||||
"SequenceNode was MappingNode: value: {containers:\n- name: myapp-container\n image: busybox}",
|
||||
},
|
||||
{
|
||||
cfg: `
|
||||
@ -962,7 +919,8 @@ spec:
|
||||
containers:
|
||||
- name: myapp-container
|
||||
image: busybox`,
|
||||
expectedErr: `strconv.Atoi: parsing "notInteger": invalid syntax`,
|
||||
expectedErr: "wrong Node Kind for spec.containers expected: " +
|
||||
"MappingNode was SequenceNode: value: {- name: myapp-container\n image: busybox}",
|
||||
},
|
||||
{
|
||||
cfg: `
|
||||
@ -1001,7 +959,8 @@ spec:
|
||||
containers:
|
||||
- image: nginx:TAG
|
||||
name: nginx-latest`,
|
||||
expectedErr: "pattern-based substitution can only be applied to string or array of strings target fields",
|
||||
expectedErr: "wrong Node Kind for expected: " +
|
||||
"ScalarNode was MappingNode: value: {image: nginx:TAG\nname: nginx-latest}",
|
||||
},
|
||||
{
|
||||
cfg: `
|
||||
@ -1058,39 +1017,7 @@ spec:
|
||||
},
|
||||
}
|
||||
|
||||
func TestReplacementTransformer(t *testing.T) {
|
||||
for _, tc := range testCases {
|
||||
cfg := make(map[string]interface{})
|
||||
err := yaml.Unmarshal([]byte(tc.cfg), &cfg)
|
||||
require.NoError(t, err)
|
||||
plugin, err := replacement.New(cfg)
|
||||
require.NoError(t, err)
|
||||
|
||||
buf := &bytes.Buffer{}
|
||||
err = plugin.Run(strings.NewReader(tc.in), buf)
|
||||
errString := ""
|
||||
if err != nil {
|
||||
errString = err.Error()
|
||||
}
|
||||
assert.Equal(t, tc.expectedErr, errString)
|
||||
assert.Equal(t, tc.expectedOut, buf.String())
|
||||
}
|
||||
}
|
||||
|
||||
func TestExec(t *testing.T) {
|
||||
// TODO (dukov) Remove this once we migrate to new kustomize plugin approach
|
||||
// NOTE (dukov) we need this since error format is different for new kustomize plugins
|
||||
testCases[13].expectedErr = "wrong Node Kind for labels.somelabel expected: " +
|
||||
"MappingNode was ScalarNode: value: {'some string value'}"
|
||||
testCases[14].expectedErr = "wrong Node Kind for labels.somelabel expected: " +
|
||||
"SequenceNode was ScalarNode: value: {'some string value'}"
|
||||
testCases[15].expectedErr = "wrong Node Kind for spec expected: " +
|
||||
"SequenceNode was MappingNode: value: {containers:\n- name: myapp-container\n image: busybox}"
|
||||
testCases[17].expectedErr = "wrong Node Kind for spec.containers expected: " +
|
||||
"MappingNode was SequenceNode: value: {- name: myapp-container\n image: busybox}"
|
||||
testCases[18].expectedErr = "wrong Node Kind for expected: " +
|
||||
"ScalarNode was MappingNode: value: {image: nginx:TAG\nname: nginx-latest}"
|
||||
|
||||
for i, tc := range testCases {
|
||||
tc := tc
|
||||
t.Run(fmt.Sprintf("Test Case %d", i), func(t *testing.T) {
|
||||
|
||||
Loading…
Reference in New Issue
Block a user