forked from containerd/containerd
/
customnameid.go
73 lines (64 loc) · 2.17 KB
/
customnameid.go
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/*
Copyright The containerd Authors.
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 (
"strings"
"github.com/gogo/protobuf/gogoproto"
"github.com/gogo/protobuf/proto"
"github.com/gogo/protobuf/protoc-gen-gogo/descriptor"
"github.com/gogo/protobuf/protoc-gen-gogo/generator"
"github.com/gogo/protobuf/vanity"
)
// CustomNameID preprocess the field, and set the [(gogoproto.customname) = "..."]
// if necessary, in order to avoid setting `gogoproto.customname` manually.
// The automatically assigned name should conform to Golang convention.
func CustomNameID(file *descriptor.FileDescriptorProto) {
f := func(field *descriptor.FieldDescriptorProto) {
// Skip if [(gogoproto.customname) = "..."] has already been set.
if gogoproto.IsCustomName(field) {
return
}
// Skip if embedded
if gogoproto.IsEmbed(field) {
return
}
if field.OneofIndex != nil {
return
}
fieldName := generator.CamelCase(*field.Name)
switch {
case *field.Name == "id":
// id -> ID
fieldName = "ID"
case strings.HasPrefix(*field.Name, "id_"):
// id_some -> IDSome
fieldName = "ID" + fieldName[2:]
case strings.HasSuffix(*field.Name, "_id"):
// some_id -> SomeID
fieldName = fieldName[:len(fieldName)-2] + "ID"
case strings.HasSuffix(*field.Name, "_ids"):
// some_ids -> SomeIDs
fieldName = fieldName[:len(fieldName)-3] + "IDs"
default:
return
}
if field.Options == nil {
field.Options = &descriptor.FieldOptions{}
}
if err := proto.SetExtension(field.Options, gogoproto.E_Customname, &fieldName); err != nil {
panic(err)
}
}
// Iterate through all fields in file
vanity.ForEachFieldExcludingExtensions(file.MessageType, f)
}