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kusttarget_configplugin.go
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kusttarget_configplugin.go
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// Copyright 2019 The Kubernetes Authors.
// SPDX-License-Identifier: Apache-2.0
package target
import (
"fmt"
"path/filepath"
"sigs.k8s.io/kustomize/api/internal/plugins/builtinconfig"
"sigs.k8s.io/kustomize/api/internal/plugins/builtinhelpers"
"sigs.k8s.io/kustomize/api/resmap"
"sigs.k8s.io/kustomize/api/resource"
"sigs.k8s.io/kustomize/api/types"
"sigs.k8s.io/kustomize/kyaml/errors"
"sigs.k8s.io/kustomize/kyaml/yaml"
)
// Functions dedicated to configuring the builtin
// transformer and generator plugins using config data
// read from a kustomization file and from the
// config.TransformerConfig, whose data may be a
// mix of hardcoded values and data read from file.
//
// Non-builtin plugins will get their configuration
// from their own dedicated structs and YAML files.
//
// There are some loops in the functions below because
// the kustomization file would, say, allow someone to
// request multiple secrets be made, or run multiple
// image tag transforms. In these cases, we'll need
// N plugin instances with differing configurations.
func (kt *KustTarget) configureBuiltinGenerators() (
result []*resmap.GeneratorWithProperties, err error) {
for _, bpt := range []builtinhelpers.BuiltinPluginType{
builtinhelpers.ConfigMapGenerator,
builtinhelpers.SecretGenerator,
builtinhelpers.HelmChartInflationGenerator,
} {
r, err := generatorConfigurators[bpt](
kt, bpt, builtinhelpers.GeneratorFactories[bpt])
if err != nil {
return nil, err
}
var generatorOrigin *resource.Origin
if kt.origin != nil {
generatorOrigin = &resource.Origin{
Repo: kt.origin.Repo,
Ref: kt.origin.Ref,
ConfiguredIn: filepath.Join(kt.origin.Path, kt.kustFileName),
ConfiguredBy: yaml.ResourceIdentifier{
TypeMeta: yaml.TypeMeta{
APIVersion: "builtin",
Kind: bpt.String(),
},
},
}
}
for i := range r {
result = append(result, &resmap.GeneratorWithProperties{Generator: r[i], Origin: generatorOrigin})
}
}
return result, nil
}
func (kt *KustTarget) configureBuiltinTransformers(
tc *builtinconfig.TransformerConfig) (
result []*resmap.TransformerWithProperties, err error) {
for _, bpt := range []builtinhelpers.BuiltinPluginType{
builtinhelpers.PatchStrategicMergeTransformer,
builtinhelpers.PatchTransformer,
builtinhelpers.NamespaceTransformer,
builtinhelpers.PrefixTransformer,
builtinhelpers.SuffixTransformer,
builtinhelpers.LabelTransformer,
builtinhelpers.AnnotationsTransformer,
builtinhelpers.PatchJson6902Transformer,
builtinhelpers.ReplicaCountTransformer,
builtinhelpers.ImageTagTransformer,
builtinhelpers.ReplacementTransformer,
} {
r, err := transformerConfigurators[bpt](
kt, bpt, builtinhelpers.TransformerFactories[bpt], tc)
if err != nil {
return nil, err
}
var transformerOrigin *resource.Origin
if kt.origin != nil {
transformerOrigin = &resource.Origin{
Repo: kt.origin.Repo,
Ref: kt.origin.Ref,
ConfiguredIn: filepath.Join(kt.origin.Path, kt.kustFileName),
ConfiguredBy: yaml.ResourceIdentifier{
TypeMeta: yaml.TypeMeta{
APIVersion: "builtin",
Kind: bpt.String(),
},
},
}
}
for i := range r {
result = append(result, &resmap.TransformerWithProperties{Transformer: r[i], Origin: transformerOrigin})
}
}
return result, nil
}
type gFactory func() resmap.GeneratorPlugin
var generatorConfigurators = map[builtinhelpers.BuiltinPluginType]func(
kt *KustTarget,
bpt builtinhelpers.BuiltinPluginType,
factory gFactory) (result []resmap.Generator, err error){
builtinhelpers.SecretGenerator: func(kt *KustTarget, bpt builtinhelpers.BuiltinPluginType, f gFactory) (
result []resmap.Generator, err error) {
var c struct {
types.SecretArgs
}
for _, args := range kt.kustomization.SecretGenerator {
c.SecretArgs = args
c.SecretArgs.Options = types.MergeGlobalOptionsIntoLocal(
c.SecretArgs.Options, kt.kustomization.GeneratorOptions)
p := f()
err := kt.configureBuiltinPlugin(p, c, bpt)
if err != nil {
return nil, err
}
result = append(result, p)
}
return
},
builtinhelpers.ConfigMapGenerator: func(kt *KustTarget, bpt builtinhelpers.BuiltinPluginType, f gFactory) (
result []resmap.Generator, err error) {
var c struct {
types.ConfigMapArgs
}
for _, args := range kt.kustomization.ConfigMapGenerator {
c.ConfigMapArgs = args
c.ConfigMapArgs.Options = types.MergeGlobalOptionsIntoLocal(
c.ConfigMapArgs.Options, kt.kustomization.GeneratorOptions)
p := f()
err := kt.configureBuiltinPlugin(p, c, bpt)
if err != nil {
return nil, err
}
result = append(result, p)
}
return
},
builtinhelpers.HelmChartInflationGenerator: func(
kt *KustTarget, bpt builtinhelpers.BuiltinPluginType, f gFactory) (
result []resmap.Generator, err error) {
var c struct {
types.HelmGlobals
types.HelmChart
}
var globals types.HelmGlobals
if kt.kustomization.HelmGlobals != nil {
globals = *kt.kustomization.HelmGlobals
}
for _, chart := range kt.kustomization.HelmCharts {
c.HelmGlobals = globals
c.HelmChart = chart
p := f()
if err = kt.configureBuiltinPlugin(p, c, bpt); err != nil {
return nil, err
}
result = append(result, p)
}
return
},
}
type tFactory func() resmap.TransformerPlugin
var transformerConfigurators = map[builtinhelpers.BuiltinPluginType]func(
kt *KustTarget,
bpt builtinhelpers.BuiltinPluginType,
f tFactory,
tc *builtinconfig.TransformerConfig) (result []resmap.Transformer, err error){
builtinhelpers.NamespaceTransformer: func(
kt *KustTarget, bpt builtinhelpers.BuiltinPluginType, f tFactory, tc *builtinconfig.TransformerConfig) (
result []resmap.Transformer, err error) {
if kt.kustomization.Namespace == "" {
return
}
var c struct {
types.ObjectMeta `json:"metadata,omitempty" yaml:"metadata,omitempty"`
FieldSpecs []types.FieldSpec
}
c.Namespace = kt.kustomization.Namespace
c.FieldSpecs = tc.NameSpace
p := f()
err = kt.configureBuiltinPlugin(p, c, bpt)
if err != nil {
return nil, err
}
result = append(result, p)
return
},
builtinhelpers.PatchJson6902Transformer: func(
kt *KustTarget, bpt builtinhelpers.BuiltinPluginType, f tFactory, _ *builtinconfig.TransformerConfig) (
result []resmap.Transformer, err error) {
var c struct {
Target *types.Selector `json:"target,omitempty" yaml:"target,omitempty"`
Path string `json:"path,omitempty" yaml:"path,omitempty"`
JsonOp string `json:"jsonOp,omitempty" yaml:"jsonOp,omitempty"`
}
for _, args := range kt.kustomization.PatchesJson6902 {
c.Target = args.Target
c.Path = args.Path
c.JsonOp = args.Patch
p := f()
err = kt.configureBuiltinPlugin(p, c, bpt)
if err != nil {
return nil, err
}
result = append(result, p)
}
return
},
builtinhelpers.PatchStrategicMergeTransformer: func(
kt *KustTarget, bpt builtinhelpers.BuiltinPluginType, f tFactory, _ *builtinconfig.TransformerConfig) (
result []resmap.Transformer, err error) {
if len(kt.kustomization.PatchesStrategicMerge) == 0 {
return
}
var c struct {
Paths []types.PatchStrategicMerge `json:"paths,omitempty" yaml:"paths,omitempty"`
}
c.Paths = kt.kustomization.PatchesStrategicMerge
p := f()
err = kt.configureBuiltinPlugin(p, c, bpt)
if err != nil {
return nil, err
}
result = append(result, p)
return
},
builtinhelpers.PatchTransformer: func(
kt *KustTarget, bpt builtinhelpers.BuiltinPluginType, f tFactory, _ *builtinconfig.TransformerConfig) (
result []resmap.Transformer, err error) {
if len(kt.kustomization.Patches) == 0 {
return
}
var c struct {
Path string `json:"path,omitempty" yaml:"path,omitempty"`
Patch string `json:"patch,omitempty" yaml:"patch,omitempty"`
Target *types.Selector `json:"target,omitempty" yaml:"target,omitempty"`
Options map[string]bool `json:"options,omitempty" yaml:"options,omitempty"`
}
for _, pc := range kt.kustomization.Patches {
c.Target = pc.Target
c.Patch = pc.Patch
c.Path = pc.Path
c.Options = pc.Options
p := f()
err = kt.configureBuiltinPlugin(p, c, bpt)
if err != nil {
return nil, err
}
result = append(result, p)
}
return
},
builtinhelpers.LabelTransformer: func(
kt *KustTarget, bpt builtinhelpers.BuiltinPluginType, f tFactory, tc *builtinconfig.TransformerConfig) (
result []resmap.Transformer, err error) {
if len(kt.kustomization.Labels) == 0 && len(kt.kustomization.CommonLabels) == 0 {
return
}
type labelStruct struct {
Labels map[string]string
FieldSpecs []types.FieldSpec
}
for _, label := range kt.kustomization.Labels {
var c labelStruct
c.Labels = label.Pairs
fss := types.FsSlice(label.FieldSpecs)
// merge labels specified in the label section of transformer configs
// these apply to selectors and templates
fss, err := fss.MergeAll(tc.Labels)
if err != nil {
return nil, fmt.Errorf("failed to merge labels: %w", err)
}
// merge the custom fieldSpecs with the default
if label.IncludeSelectors {
fss, err = fss.MergeAll(tc.CommonLabels)
} else {
// merge spec/template/metadata fieldSpecs if includeTemplate flag is true
if label.IncludeTemplates {
fss, err = fss.MergeAll(tc.TemplateLabels)
if err != nil {
return nil, errors.WrapPrefixf(err, "failed to merge template fieldSpec")
}
}
// only add to metadata by default
fss, err = fss.MergeOne(types.FieldSpec{Path: "metadata/labels", CreateIfNotPresent: true})
}
if err != nil {
return nil, fmt.Errorf("failed to merge labels: %w", err)
}
c.FieldSpecs = fss
p := f()
err = kt.configureBuiltinPlugin(p, c, bpt)
if err != nil {
return nil, err
}
result = append(result, p)
}
var c labelStruct
c.Labels = kt.kustomization.CommonLabels
c.FieldSpecs = tc.CommonLabels
p := f()
err = kt.configureBuiltinPlugin(p, c, bpt)
if err != nil {
return nil, err
}
result = append(result, p)
return
},
builtinhelpers.AnnotationsTransformer: func(
kt *KustTarget, bpt builtinhelpers.BuiltinPluginType, f tFactory, tc *builtinconfig.TransformerConfig) (
result []resmap.Transformer, err error) {
if len(kt.kustomization.CommonAnnotations) == 0 {
return
}
var c struct {
Annotations map[string]string
FieldSpecs []types.FieldSpec
}
c.Annotations = kt.kustomization.CommonAnnotations
c.FieldSpecs = tc.CommonAnnotations
p := f()
err = kt.configureBuiltinPlugin(p, c, bpt)
if err != nil {
return nil, err
}
result = append(result, p)
return
},
builtinhelpers.PrefixTransformer: func(
kt *KustTarget, bpt builtinhelpers.BuiltinPluginType, f tFactory, tc *builtinconfig.TransformerConfig) (
result []resmap.Transformer, err error) {
if kt.kustomization.NamePrefix == "" {
return
}
var c struct {
Prefix string `json:"prefix,omitempty" yaml:"prefix,omitempty"`
FieldSpecs []types.FieldSpec `json:"fieldSpecs,omitempty" yaml:"fieldSpecs,omitempty"`
}
c.Prefix = kt.kustomization.NamePrefix
c.FieldSpecs = tc.NamePrefix
p := f()
err = kt.configureBuiltinPlugin(p, c, bpt)
if err != nil {
return nil, err
}
result = append(result, p)
return
},
builtinhelpers.SuffixTransformer: func(
kt *KustTarget, bpt builtinhelpers.BuiltinPluginType, f tFactory, tc *builtinconfig.TransformerConfig) (
result []resmap.Transformer, err error) {
if kt.kustomization.NameSuffix == "" {
return
}
var c struct {
Suffix string `json:"suffix,omitempty" yaml:"suffix,omitempty"`
FieldSpecs []types.FieldSpec `json:"fieldSpecs,omitempty" yaml:"fieldSpecs,omitempty"`
}
c.Suffix = kt.kustomization.NameSuffix
c.FieldSpecs = tc.NameSuffix
p := f()
err = kt.configureBuiltinPlugin(p, c, bpt)
if err != nil {
return nil, err
}
result = append(result, p)
return
},
builtinhelpers.ImageTagTransformer: func(
kt *KustTarget, bpt builtinhelpers.BuiltinPluginType, f tFactory, tc *builtinconfig.TransformerConfig) (
result []resmap.Transformer, err error) {
var c struct {
ImageTag types.Image
FieldSpecs []types.FieldSpec
}
for _, args := range kt.kustomization.Images {
c.ImageTag = args
c.FieldSpecs = tc.Images
p := f()
err = kt.configureBuiltinPlugin(p, c, bpt)
if err != nil {
return nil, err
}
result = append(result, p)
}
return
},
builtinhelpers.ReplacementTransformer: func(
kt *KustTarget, bpt builtinhelpers.BuiltinPluginType, f tFactory, _ *builtinconfig.TransformerConfig) (
result []resmap.Transformer, err error) {
if len(kt.kustomization.Replacements) == 0 {
return
}
var c struct {
Replacements []types.ReplacementField
}
c.Replacements = kt.kustomization.Replacements
p := f()
err = kt.configureBuiltinPlugin(p, c, bpt)
if err != nil {
return nil, err
}
result = append(result, p)
return result, nil
},
builtinhelpers.ReplicaCountTransformer: func(
kt *KustTarget, bpt builtinhelpers.BuiltinPluginType, f tFactory, tc *builtinconfig.TransformerConfig) (
result []resmap.Transformer, err error) {
var c struct {
Replica types.Replica
FieldSpecs []types.FieldSpec
}
for _, args := range kt.kustomization.Replicas {
c.Replica = args
c.FieldSpecs = tc.Replicas
p := f()
err = kt.configureBuiltinPlugin(p, c, bpt)
if err != nil {
return nil, err
}
result = append(result, p)
}
return
},
// No kustomization file keyword for this yet.
builtinhelpers.ValueAddTransformer: func(
kt *KustTarget, bpt builtinhelpers.BuiltinPluginType, f tFactory, tc *builtinconfig.TransformerConfig) (
result []resmap.Transformer, err error) {
return nil, fmt.Errorf("valueadd keyword not yet defined")
},
}