93 lines
3.2 KiB
Go
93 lines
3.2 KiB
Go
// Protocol Buffers for Go with Gadgets
|
|
//
|
|
// Copyright (c) 2013, The GoGo Authors. All rights reserved.
|
|
// http://github.com/gogo/protobuf
|
|
//
|
|
// Redistribution and use in source and binary forms, with or without
|
|
// modification, are permitted provided that the following conditions are
|
|
// met:
|
|
//
|
|
// * Redistributions of source code must retain the above copyright
|
|
// notice, this list of conditions and the following disclaimer.
|
|
// * Redistributions in binary form must reproduce the above
|
|
// copyright notice, this list of conditions and the following disclaimer
|
|
// in the documentation and/or other materials provided with the
|
|
// distribution.
|
|
//
|
|
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
|
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
|
|
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
|
|
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
|
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
|
|
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
|
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
|
|
/*
|
|
The oneofcheck plugin is used to check whether oneof is not used incorrectly.
|
|
For instance:
|
|
An error is caused if a oneof field:
|
|
- is used in a face
|
|
- is an embedded field
|
|
|
|
*/
|
|
package oneofcheck
|
|
|
|
import (
|
|
"fmt"
|
|
"github.com/gogo/protobuf/gogoproto"
|
|
"github.com/gogo/protobuf/protoc-gen-gogo/generator"
|
|
"os"
|
|
)
|
|
|
|
type plugin struct {
|
|
*generator.Generator
|
|
}
|
|
|
|
func NewPlugin() *plugin {
|
|
return &plugin{}
|
|
}
|
|
|
|
func (p *plugin) Name() string {
|
|
return "oneofcheck"
|
|
}
|
|
|
|
func (p *plugin) Init(g *generator.Generator) {
|
|
p.Generator = g
|
|
}
|
|
|
|
func (p *plugin) Generate(file *generator.FileDescriptor) {
|
|
for _, msg := range file.Messages() {
|
|
face := gogoproto.IsFace(file.FileDescriptorProto, msg.DescriptorProto)
|
|
for _, field := range msg.GetField() {
|
|
if field.OneofIndex == nil {
|
|
continue
|
|
}
|
|
if face {
|
|
fmt.Fprintf(os.Stderr, "ERROR: field %v.%v cannot be in a face and oneof\n", generator.CamelCase(*msg.Name), generator.CamelCase(*field.Name))
|
|
os.Exit(1)
|
|
}
|
|
if gogoproto.IsEmbed(field) {
|
|
fmt.Fprintf(os.Stderr, "ERROR: field %v.%v cannot be in an oneof and an embedded field\n", generator.CamelCase(*msg.Name), generator.CamelCase(*field.Name))
|
|
os.Exit(1)
|
|
}
|
|
if !gogoproto.IsNullable(field) {
|
|
fmt.Fprintf(os.Stderr, "ERROR: field %v.%v cannot be in an oneof and a non-nullable field\n", generator.CamelCase(*msg.Name), generator.CamelCase(*field.Name))
|
|
os.Exit(1)
|
|
}
|
|
if gogoproto.IsUnion(file.FileDescriptorProto, msg.DescriptorProto) {
|
|
fmt.Fprintf(os.Stderr, "ERROR: field %v.%v cannot be in an oneof and in an union (deprecated)\n", generator.CamelCase(*msg.Name), generator.CamelCase(*field.Name))
|
|
os.Exit(1)
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
func (p *plugin) GenerateImports(*generator.FileDescriptor) {}
|
|
|
|
func init() {
|
|
generator.RegisterPlugin(NewPlugin())
|
|
}
|