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main.go
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main.go
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package main
import (
"flag"
"log"
"os"
"cloud.google.com/go/longrunning/autogen/longrunningpb"
"google.golang.org/genproto/googleapis/api/annotations"
"google.golang.org/protobuf/proto"
"google.golang.org/protobuf/types/descriptorpb"
)
func main() {
var filename string
flag.StringVar(&filename, "f", "", "file descriptor set to scrub")
flag.Parse()
if filename == "" {
flag.Usage()
os.Exit(1)
}
input, err := os.ReadFile(filename)
if err != nil {
log.Fatal(err)
}
var fileDescriptorSet descriptorpb.FileDescriptorSet
if err := proto.Unmarshal(input, &fileDescriptorSet); err != nil {
log.Fatal(err)
}
for _, file := range fileDescriptorSet.GetFile() {
file.Dependency = scrubDependencies(file.GetDependency())
scrubResourceDefinitions(file)
for _, message := range file.GetMessageType() {
scrubResource(message)
scrubResourceReferences(message)
scrubFieldBehaviors(message)
scrubMessageFields(message)
}
for _, service := range file.GetService() {
scrubServiceOptions(service)
for _, method := range service.GetMethod() {
scrubLongRunningOperationInfo(method)
scrubMethodSignature(method)
}
}
}
output, err := proto.Marshal(&fileDescriptorSet)
if err != nil {
log.Fatal(err)
}
if err := os.WriteFile(filename, output, 0o600); err != nil {
log.Fatal(err)
}
}
func scrubDependencies(dependencies []string) []string {
var n int
for _, dependency := range dependencies {
switch dependency {
case "google/api/client.proto",
"google/api/resource.proto",
"google/api/field_behavior.proto":
continue
}
dependencies[n] = dependency
n++
}
return dependencies[:n]
}
func scrubResourceDefinitions(file *descriptorpb.FileDescriptorProto) {
if file.GetOptions() != nil {
proto.ClearExtension(file.GetOptions(), annotations.E_ResourceDefinition)
}
}
func scrubResource(message *descriptorpb.DescriptorProto) {
if message.GetOptions() != nil {
proto.ClearExtension(message.GetOptions(), annotations.E_Resource)
}
}
func scrubServiceOptions(service *descriptorpb.ServiceDescriptorProto) {
if service.GetOptions() != nil {
proto.ClearExtension(service.GetOptions(), annotations.E_DefaultHost)
}
}
func scrubMessageFields(message *descriptorpb.DescriptorProto) {
n := 0
for _, field := range message.GetField() {
if field.GetTypeName() != ".google.api.ResourceDescriptor" {
message.Field[n] = field
n++
}
}
message.Field = message.GetField()[:n]
for _, nestedMessage := range message.GetNestedType() {
scrubMessageFields(nestedMessage)
}
}
func scrubResourceReferences(message *descriptorpb.DescriptorProto) {
for _, field := range message.GetField() {
if field.GetOptions() != nil {
proto.ClearExtension(field.GetOptions(), annotations.E_ResourceReference)
}
}
for _, nestedMessage := range message.GetNestedType() {
scrubResourceReferences(nestedMessage)
}
}
func scrubFieldBehaviors(message *descriptorpb.DescriptorProto) {
for _, field := range message.GetField() {
if field.GetOptions() != nil {
proto.ClearExtension(field.GetOptions(), annotations.E_FieldBehavior)
}
}
for _, nestedMessage := range message.GetNestedType() {
scrubFieldBehaviors(nestedMessage)
}
}
func scrubLongRunningOperationInfo(method *descriptorpb.MethodDescriptorProto) {
if method.GetOptions() != nil {
proto.ClearExtension(method.GetOptions(), longrunningpb.E_OperationInfo)
}
}
func scrubMethodSignature(method *descriptorpb.MethodDescriptorProto) {
if method.GetOptions() != nil {
proto.ClearExtension(method.GetOptions(), annotations.E_MethodSignature)
}
}