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// Copyright 2019 The Kubernetes Authors.
// SPDX-License-Identifier: Apache-2.0
package accumulator
import (
"encoding/json"
"strings"
"k8s.io/kube-openapi/pkg/validation/spec"
"sigs.k8s.io/kustomize/api/ifc"
"sigs.k8s.io/kustomize/api/internal/plugins/builtinconfig"
"sigs.k8s.io/kustomize/api/types"
"sigs.k8s.io/kustomize/kyaml/errors"
"sigs.k8s.io/kustomize/kyaml/filesys"
"sigs.k8s.io/kustomize/kyaml/resid"
"sigs.k8s.io/yaml"
)
// OpenAPIDefinition describes single type.
// Normally these definitions are auto-generated using gen-openapi.
// Same as in k8s.io / kube-openapi / pkg / common.
type OpenAPIDefinition struct {
Schema spec.Schema
Dependencies []string
}
type myProperties = map[string]spec.Schema
type nameToApiMap map[string]OpenAPIDefinition
// LoadConfigFromCRDs parse CRD schemas from paths into a TransformerConfig
func LoadConfigFromCRDs(
ldr ifc.Loader, paths []string) (*builtinconfig.TransformerConfig, error) {
tc := builtinconfig.MakeEmptyConfig()
for _, path := range paths {
content, err := ldr.Load(path)
if err != nil {
return nil, err
}
m, err := makeNameToApiMap(content)
if err != nil {
return nil, errors.WrapPrefixf(err, "unable to parse open API definition from '%s'", path)
}
otherTc, err := makeConfigFromApiMap(m)
if err != nil {
return nil, err
}
tc, err = tc.Merge(otherTc)
if err != nil {
return nil, err
}
}
return tc, nil
}
func makeNameToApiMap(content []byte) (result nameToApiMap, err error) {
if content[0] == '{' {
err = json.Unmarshal(content, &result)
} else {
err = yaml.Unmarshal(content, &result)
}
return
}
func makeConfigFromApiMap(m nameToApiMap) (*builtinconfig.TransformerConfig, error) {
result := builtinconfig.MakeEmptyConfig()
for name, api := range m {
if !looksLikeAk8sType(api.Schema.SchemaProps.Properties) {
continue
}
tc := builtinconfig.MakeEmptyConfig()
err := loadCrdIntoConfig(
tc, makeGvkFromTypeName(name), m, name, []string{})
if err != nil {
return result, err
}
result, err = result.Merge(tc)
if err != nil {
return result, err
}
}
return result, nil
}
// TODO: Get Group and Version for CRD from the
// openAPI definition once
// "x-kubernetes-group-version-kind" is available in CRD
func makeGvkFromTypeName(n string) resid.Gvk {
names := strings.Split(n, filesys.SelfDir)
kind := names[len(names)-1]
return resid.Gvk{Kind: kind}
}
func looksLikeAk8sType(properties myProperties) bool {
_, ok := properties["kind"]
if !ok {
return false
}
_, ok = properties["apiVersion"]
if !ok {
return false
}
_, ok = properties["metadata"]
return ok
}
const (
// "x-kubernetes-annotation": ""
xAnnotation = "x-kubernetes-annotation"
// "x-kubernetes-label-selector": ""
xLabelSelector = "x-kubernetes-label-selector"
// "x-kubernetes-identity": ""
xIdentity = "x-kubernetes-identity"
// "x-kubernetes-object-ref-api-version": <apiVersion name>
xVersion = "x-kubernetes-object-ref-api-version"
// "x-kubernetes-object-ref-kind": <kind name>
xKind = "x-kubernetes-object-ref-kind"
// "x-kubernetes-object-ref-name-key": "name"
// default is "name"
xNameKey = "x-kubernetes-object-ref-name-key"
)
// loadCrdIntoConfig loads a CRD spec into a TransformerConfig
func loadCrdIntoConfig(
theConfig *builtinconfig.TransformerConfig, theGvk resid.Gvk, theMap nameToApiMap,
typeName string, path []string) (err error) {
api, ok := theMap[typeName]
if !ok {
return nil
}
for propName, property := range api.Schema.SchemaProps.Properties {
_, annotate := property.Extensions.GetString(xAnnotation)
if annotate {
err = theConfig.AddAnnotationFieldSpec(
makeFs(theGvk, append(path, propName)))
if err != nil {
return
}
}
_, label := property.Extensions.GetString(xLabelSelector)
if label {
err = theConfig.AddCommonLabelsFieldSpec(
makeFs(theGvk, append(path, propName)))
if err != nil {
return
}
}
_, identity := property.Extensions.GetString(xIdentity)
if identity {
err = theConfig.AddPrefixFieldSpec(
makeFs(theGvk, append(path, propName)))
if err != nil {
return
}
}
version, ok := property.Extensions.GetString(xVersion)
if ok {
kind, ok := property.Extensions.GetString(xKind)
if ok {
nameKey, ok := property.Extensions.GetString(xNameKey)
if !ok {
nameKey = "name"
}
err = theConfig.AddNamereferenceFieldSpec(
builtinconfig.NameBackReferences{
Gvk: resid.Gvk{Kind: kind, Version: version},
Referrers: []types.FieldSpec{
makeFs(theGvk, append(path, propName, nameKey))},
})
if err != nil {
return
}
}
}
if property.Ref.GetURL() != nil {
err = loadCrdIntoConfig(
theConfig, theGvk, theMap,
property.Ref.String(), append(path, propName))
if err != nil {
return
}
}
}
return nil
}
func makeFs(in resid.Gvk, path []string) types.FieldSpec {
return types.FieldSpec{
CreateIfNotPresent: false,
Gvk: in,
Path: strings.Join(path, "/"),
}
}
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