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main.go
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main.go
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// Copyright 2022 Google LLC
//
// 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
//
// http://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 main
import (
"fmt"
"log"
"os"
"path"
"text/template"
dclextension "github.com/GoogleCloudPlatform/k8s-config-connector/pkg/dcl/extension"
dclmetadata "github.com/GoogleCloudPlatform/k8s-config-connector/pkg/dcl/metadata"
"github.com/GoogleCloudPlatform/k8s-config-connector/pkg/dcl/schema/dclschemaloader"
"github.com/GoogleCloudPlatform/k8s-config-connector/pkg/k8s"
"github.com/GoogleCloudPlatform/k8s-config-connector/pkg/krmtotf"
"github.com/GoogleCloudPlatform/k8s-config-connector/pkg/servicemapping/servicemappingloader"
"github.com/GoogleCloudPlatform/k8s-config-connector/pkg/util/fileutil"
"github.com/GoogleCloudPlatform/k8s-config-connector/pkg/util/repo"
"k8s.io/apimachinery/pkg/runtime/schema"
)
type templateData struct {
Resources []schema.GroupVersionKind
}
func main() {
if err := clearGeneratedDocDir(); err != nil {
log.Fatal(fmt.Errorf("error clearing generated doc dir: %w", err))
}
smLoader, err := servicemappingloader.New()
if err != nil {
log.Fatal(fmt.Errorf("error creating service mapping loader: %w", err))
}
serviceMetadataLoader := dclmetadata.New()
dclSchemaLoader, err := dclschemaloader.New()
if err != nil {
log.Fatal(fmt.Errorf("error creating a DCL schema loader: %w", err))
}
if err := generateListOfResourcesWithServiceGeneratedResourceID(smLoader, serviceMetadataLoader, dclSchemaLoader); err != nil {
log.Fatal(err)
}
if err := generateListOfUnacquirableResources(smLoader); err != nil {
log.Fatal(err)
}
}
func generateListOfResourcesWithServiceGeneratedResourceID(smLoader *servicemappingloader.ServiceMappingLoader, serviceMetadataLoader dclmetadata.ServiceMetadataLoader, dclSchemaLoader dclschemaloader.DCLSchemaLoader) error {
// Use "service-generated" instead of "server-generated" in the output file
// name since the former is the terminology used by the public docs.
const outputFileName = "_resources-with-service-generated-resource-id.html"
resources, err := resourcesWithServerGeneratedResourceID(smLoader, serviceMetadataLoader, dclSchemaLoader)
if err != nil {
return fmt.Errorf("error getting resources with a server-generated resource ID: %w", err)
}
return generateListOfResources(resources, outputFileName)
}
func generateListOfUnacquirableResources(smLoader *servicemappingloader.ServiceMappingLoader) error {
const outputFileName = "_unacquirable-resources.html"
resources := unacquirableResources(smLoader)
return generateListOfResources(resources, outputFileName)
}
func generateListOfResources(resources []schema.GroupVersionKind, outputFileName string) error {
outputFilePath := path.Join(repo.GetG3ResourceListsGeneratedPath(), outputFileName)
outputFile, err := fileutil.NewEmptyFile(outputFilePath)
if err != nil {
return fmt.Errorf("error creating empty file for output: %w", err)
}
templateFilePath := repo.GetG3ResourceListsTemplatePath()
template, err := template.ParseFiles(templateFilePath)
if err != nil {
return fmt.Errorf("error parsing template file: %w", err)
}
templateData := &templateData{
Resources: resources,
}
if err := template.Execute(outputFile, templateData); err != nil {
return fmt.Errorf("error while executing template: %w", err)
}
return nil
}
func resourcesWithServerGeneratedResourceID(smLoader *servicemappingloader.ServiceMappingLoader, serviceMetadataLoader dclmetadata.ServiceMetadataLoader, dclSchemaLoader dclschemaloader.DCLSchemaLoader) ([]schema.GroupVersionKind, error) {
tfResources := tfBasedResourcesWithServerGeneratedResourceID(smLoader)
dclResources, err := dclBasedResourcesWithServerGeneratedResourceID(serviceMetadataLoader, dclSchemaLoader)
if err != nil {
return nil, fmt.Errorf("error getting DCL-based resources with a server-generated resource ID: %w", err)
}
return k8s.SortGVKsByKind(append(tfResources, dclResources...)), nil
}
func tfBasedResourcesWithServerGeneratedResourceID(smLoader *servicemappingloader.ServiceMappingLoader) []schema.GroupVersionKind {
gvkList := make([]schema.GroupVersionKind, 0)
for _, sm := range smLoader.GetServiceMappings() {
for _, rc := range sm.Spec.Resources {
if krmtotf.SupportsResourceIDField(&rc) && krmtotf.IsResourceIDFieldServerGenerated(&rc) && !rc.AutoGenerated {
gvk := krmtotf.GVKForResource(&sm, &rc)
gvkList = append(gvkList, gvk)
}
}
}
return gvkList
}
func dclBasedResourcesWithServerGeneratedResourceID(serviceMetadataLoader dclmetadata.ServiceMetadataLoader, dclSchemaLoader dclschemaloader.DCLSchemaLoader) ([]schema.GroupVersionKind, error) {
gvkList := make([]schema.GroupVersionKind, 0)
for _, s := range serviceMetadataLoader.GetAllServiceMetadata() {
for _, r := range s.Resources {
if !r.Releasable {
continue
}
gvk := dclmetadata.GVKForResource(s, r)
schema, err := dclschemaloader.GetDCLSchemaForGVK(gvk, serviceMetadataLoader, dclSchemaLoader)
if err != nil {
return nil, fmt.Errorf("error getting DCL schema for GroupVersionKind %v: %w", gvk, err)
}
nameFieldSchema, ok := dclextension.GetNameFieldSchema(schema)
if !ok {
// Resource doesn't support the resourceID field
continue
}
isServerGenerated, err := dclextension.IsResourceIDFieldServerGenerated(nameFieldSchema)
if err != nil {
return nil, fmt.Errorf("error determining if resourceID is server-generated for GroupVersionKind %v: %w", gvk, err)
}
if !isServerGenerated {
continue
}
gvkList = append(gvkList, gvk)
}
}
return gvkList, nil
}
func unacquirableResources(smLoader *servicemappingloader.ServiceMappingLoader) []schema.GroupVersionKind {
// Only TF resources can be unacquirable because only TF resources can have
// a server-generated ID that cannot be set via the resourceID field.
gvkList := make([]schema.GroupVersionKind, 0)
for _, sm := range smLoader.GetServiceMappings() {
for _, rc := range sm.Spec.Resources {
if !krmtotf.SupportsResourceIDField(&rc) && krmtotf.SupportsServerGeneratedIDField(&rc) {
gvk := krmtotf.GVKForResource(&sm, &rc)
gvkList = append(gvkList, gvk)
}
}
}
return k8s.SortGVKsByKind(gvkList)
}
func clearGeneratedDocDir() error {
docDir := repo.GetG3ResourceListsGeneratedPath()
if err := os.RemoveAll(docDir); err != nil {
return fmt.Errorf("error deleting generated doc dir at %v: %w", docDir, err)
}
if err := os.Mkdir(docDir, 0700); err != nil {
return fmt.Errorf("error recreating generated doc dir at %v: %w", docDir, err)
}
return nil
}