| // Copyright 2018 The Go Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style |
| // license that can be found in the LICENSE file. |
| |
| // This file contains functions for fetching the options for a protoreflect descriptor. |
| // |
| // TODO: Replace this with the appropriate protoreflect API, once it exists. |
| |
| package main |
| |
| import ( |
| descpb "github.com/golang/protobuf/protoc-gen-go/descriptor" |
| "google.golang.org/proto/protogen" |
| "google.golang.org/proto/reflect/protoreflect" |
| ) |
| |
| // messageOptions returns the MessageOptions for a message. |
| func messageOptions(gen *protogen.Plugin, message *protogen.Message) *descpb.MessageOptions { |
| file, ok := descriptorFile(gen, message.Desc) |
| if !ok { |
| return nil |
| } |
| desc := file.Proto.MessageType[message.Path[1]] |
| for i := 3; i < len(message.Path); i += 2 { |
| desc = desc.NestedType[message.Path[1]] |
| } |
| return desc.GetOptions() |
| } |
| |
| func descriptorFile(gen *protogen.Plugin, desc protoreflect.Descriptor) (*protogen.File, bool) { |
| for { |
| if fdesc, ok := desc.(protoreflect.FileDescriptor); ok { |
| return gen.FileByName(fdesc.Path()) |
| } |
| var ok bool |
| desc, ok = desc.Parent() |
| if !ok { |
| return nil, false |
| } |
| } |
| } |