mirror of
https://github.com/kubernetes-sigs/kustomize.git
synced 2026-05-21 22:41:42 +00:00
140 lines
3.9 KiB
Go
140 lines
3.9 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 target
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import (
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"fmt"
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"log"
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"sigs.k8s.io/kustomize/pkg/resid"
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"sigs.k8s.io/kustomize/pkg/resmap"
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"sigs.k8s.io/kustomize/pkg/transformers"
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"sigs.k8s.io/kustomize/pkg/transformers/config"
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"sigs.k8s.io/kustomize/pkg/types"
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)
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// ResAccumulator accumulates resources and the rules
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// used to customize those resources.
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// TODO(monopole): Move to "accumulator" package and make members private.
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// This will make a better separation between KustTarget, which should
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// be mainly concerned with data loading, and this class, which could
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// become the home of all transformation data and logic.
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type ResAccumulator struct {
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resMap resmap.ResMap
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tConfig *config.TransformerConfig
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varSet types.VarSet
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}
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func MakeEmptyAccumulator() *ResAccumulator {
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ra := &ResAccumulator{}
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ra.resMap = make(resmap.ResMap)
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ra.tConfig = &config.TransformerConfig{}
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ra.varSet = types.VarSet{}
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return ra
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}
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// ResMap returns a copy of the internal resMap.
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func (ra *ResAccumulator) ResMap() resmap.ResMap {
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result := make(resmap.ResMap)
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for k, v := range ra.resMap {
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result[k] = v
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}
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return result
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}
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// Vars returns a copy of underlying vars.
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func (ra *ResAccumulator) Vars() []types.Var {
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return ra.varSet.Set()
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}
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func (ra *ResAccumulator) MergeResourcesWithErrorOnIdCollision(
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resources resmap.ResMap) (err error) {
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ra.resMap, err = resmap.MergeWithErrorOnIdCollision(
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resources, ra.resMap)
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return err
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}
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func (ra *ResAccumulator) MergeResourcesWithOverride(
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resources resmap.ResMap) (err error) {
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ra.resMap, err = resmap.MergeWithOverride(
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ra.resMap, resources)
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return err
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}
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func (ra *ResAccumulator) MergeConfig(
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tConfig *config.TransformerConfig) (err error) {
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ra.tConfig, err = ra.tConfig.Merge(tConfig)
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return err
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}
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func (ra *ResAccumulator) MergeVars(incoming []types.Var) error {
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return ra.varSet.MergeSlice(incoming)
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}
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func (ra *ResAccumulator) MergeAccumulator(other *ResAccumulator) (err error) {
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err = ra.MergeResourcesWithErrorOnIdCollision(other.resMap)
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if err != nil {
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return err
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}
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err = ra.MergeConfig(other.tConfig)
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if err != nil {
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return err
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}
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return ra.varSet.MergeSet(&other.varSet)
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}
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// makeVarReplacementMap returns a map of Var names to
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// their final values. The values are strings intended
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// for substitution wherever the $(var.Name) occurs.
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func (ra *ResAccumulator) makeVarReplacementMap() (map[string]string, error) {
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result := map[string]string{}
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for _, v := range ra.varSet.Set() {
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id := resid.NewResId(v.ObjRef.GVK(), v.ObjRef.Name)
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if r, found := ra.resMap.DemandOneMatchForId(id); found {
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s, err := r.GetFieldValue(v.FieldRef.FieldPath)
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if err != nil {
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return nil, fmt.Errorf("field path err for var: %+v", v)
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}
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result[v.Name] = s
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} else {
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// Should this be an error?
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log.Printf("var %v defined but not used", v)
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}
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}
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return result, nil
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}
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func (ra *ResAccumulator) Transform(t transformers.Transformer) error {
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return t.Transform(ra.resMap)
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}
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func (ra *ResAccumulator) ResolveVars() error {
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replacementMap, err := ra.makeVarReplacementMap()
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if err != nil {
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return err
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}
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return ra.Transform(transformers.NewRefVarTransformer(
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replacementMap, ra.tConfig.VarReference))
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}
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func (ra *ResAccumulator) FixBackReferences() (err error) {
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if ra.tConfig.NameReference == nil {
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return nil
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}
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return ra.Transform(transformers.NewNameReferenceTransformer(
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ra.tConfig.NameReference))
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}
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