main.go

Documentation: google.golang.org/protobuf/cmd/protoc-gen-go

     1  // Copyright 2018 The Go Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  // The protoc-gen-go binary is a protoc plugin to generate Go code for
     6  // both proto2 and proto3 versions of the protocol buffer language.
     7  //
     8  // For more information about the usage of this plugin, see:
     9  // https://protobuf.dev/reference/go/go-generated.
    10  package main
    11  
    12  import (
    13  	"errors"
    14  	"flag"
    15  	"fmt"
    16  	"os"
    17  	"path/filepath"
    18  
    19  	gengo "google.golang.org/protobuf/cmd/protoc-gen-go/internal_gengo"
    20  	"google.golang.org/protobuf/compiler/protogen"
    21  	"google.golang.org/protobuf/internal/version"
    22  )
    23  
    24  const genGoDocURL = "https://protobuf.dev/reference/go/go-generated"
    25  const grpcDocURL = "https://grpc.io/docs/languages/go/quickstart/#regenerate-grpc-code"
    26  
    27  func main() {
    28  	if len(os.Args) == 2 && os.Args[1] == "--version" {
    29  		fmt.Fprintf(os.Stdout, "%v %v\n", filepath.Base(os.Args[0]), version.String())
    30  		os.Exit(0)
    31  	}
    32  	if len(os.Args) == 2 && os.Args[1] == "--help" {
    33  		fmt.Fprintf(os.Stdout, "See "+genGoDocURL+" for usage information.\n")
    34  		os.Exit(0)
    35  	}
    36  
    37  	var (
    38  		flags   flag.FlagSet
    39  		plugins = flags.String("plugins", "", "deprecated option")
    40  	)
    41  	protogen.Options{
    42  		ParamFunc: flags.Set,
    43  	}.Run(func(gen *protogen.Plugin) error {
    44  		if *plugins != "" {
    45  			return errors.New("protoc-gen-go: plugins are not supported; use 'protoc --go-grpc_out=...' to generate gRPC\n\n" +
    46  				"See " + grpcDocURL + " for more information.")
    47  		}
    48  		for _, f := range gen.Files {
    49  			if f.Generate {
    50  				gengo.GenerateFile(gen, f)
    51  			}
    52  		}
    53  		gen.SupportedFeatures = gengo.SupportedFeatures
    54  		return nil
    55  	})
    56  }
    57
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