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// 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.
// The protoc-gen-go binary is a protoc plugin to generate Go code for
// both proto2 and proto3 versions of the protocol buffer language.
//
// For more information about the usage of this plugin, see:
// https://protobuf.dev/reference/go/go-generated.
package main
import (
"errors"
"flag"
"fmt"
"os"
"path/filepath"
gengo "google.golang.org/protobuf/cmd/protoc-gen-go/internal_gengo"
"google.golang.org/protobuf/compiler/protogen"
"google.golang.org/protobuf/internal/version"
)
const genGoDocURL = "https://protobuf.dev/reference/go/go-generated"
const grpcDocURL = "https://grpc.io/docs/languages/go/quickstart/#regenerate-grpc-code"
func main() {
if len(os.Args) == 2 && os.Args[1] == "--version" {
fmt.Fprintf(os.Stdout, "%v %v\n", filepath.Base(os.Args[0]), version.String())
os.Exit(0)
}
if len(os.Args) == 2 && os.Args[1] == "--help" {
fmt.Fprintf(os.Stdout, "See "+genGoDocURL+" for usage information.\n")
os.Exit(0)
}
var (
flags flag.FlagSet
plugins = flags.String("plugins", "", "deprecated option")
experimentalStripNonFunctionalCodegen = flags.Bool("experimental_strip_nonfunctional_codegen", false, "experimental_strip_nonfunctional_codegen true means that the plugin will not emit certain parts of the generated code in order to make it possible to compare a proto2/proto3 file with its equivalent (according to proto spec) editions file. Primarily, this is the encoded descriptor.")
)
protogen.Options{
ParamFunc: flags.Set,
InternalStripForEditionsDiff: experimentalStripNonFunctionalCodegen,
}.Run(func(gen *protogen.Plugin) error {
if *plugins != "" {
return errors.New("protoc-gen-go: plugins are not supported; use 'protoc --go-grpc_out=...' to generate gRPC\n\n" +
"See " + grpcDocURL + " for more information.")
}
for _, f := range gen.Files {
if f.Generate {
gengo.GenerateFile(gen, f)
}
}
gen.SupportedFeatures = gengo.SupportedFeatures
gen.SupportedEditionsMinimum = gengo.SupportedEditionsMinimum
gen.SupportedEditionsMaximum = gengo.SupportedEditionsMaximum
return nil
})
}
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