forked from bufbuild/buf
/
main.go
76 lines (70 loc) · 2.47 KB
/
main.go
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// Copyright 2020-2021 Buf Technologies, Inc.
//
// 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 (
"context"
"strings"
"github.com/powerman/buf/internal/pkg/app/appproto"
"github.com/powerman/buf/internal/pkg/protogenutil"
"google.golang.org/protobuf/compiler/protogen"
)
const (
contextPackage = protogen.GoImportPath("context")
pluginName = "api"
)
func main() {
appproto.Main(context.Background(), protogenutil.NewNamedPerFileHandler(handle))
}
func handle(helper protogenutil.NamedHelper, plugin *protogen.Plugin, file *protogen.File) error {
if len(file.Services) == 0 {
return nil
}
g, err := helper.NewGeneratedFile(plugin, file, pluginName)
if err != nil {
return err
}
contextGoIdentString := g.QualifiedGoIdent(contextPackage.Ident("Context"))
for _, service := range file.Services {
interfaceName := service.GoName
g.P(service.Comments.Leading, `type `, interfaceName, ` interface {`)
for _, method := range service.Methods {
if err := protogenutil.ValidateMethodUnary(method); err != nil {
return err
}
requestParameterStrings, err := protogenutil.GetParameterStrings(g, method.Input.Fields)
if err != nil {
return err
}
responseParameterStrings, err := protogenutil.GetParameterStrings(g, method.Output.Fields)
if err != nil {
return err
}
funcName := method.GoName
funcParameterStrings := append([]string{`ctx ` + contextGoIdentString}, requestParameterStrings...)
funcReturnStrings := append(responseParameterStrings, `err error`)
if len(funcParameterStrings) > 2 || len(funcReturnStrings) > 2 {
g.P(method.Comments.Leading, funcName, `(`)
for _, funcParameterString := range funcParameterStrings {
g.P(funcParameterString, `,`)
}
g.P(`) (`, strings.Join(funcReturnStrings, `, `), `)`)
} else {
g.P(method.Comments.Leading, funcName, `(`, strings.Join(funcParameterStrings, `, `), `) (`, strings.Join(funcReturnStrings, `, `), `)`)
}
}
g.P(`}`)
g.P()
}
return nil
}