You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
93 lines
3.2 KiB
93 lines
3.2 KiB
// 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()) |
|
}
|
|
|