github.com/cloudwego/kitex@v0.9.0/tool/internal_pkg/pluginmode/protoc/protoc.go (about)

     1  // Copyright 2021 CloudWeGo Authors
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //   http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package protoc
    16  
    17  import (
    18  	"errors"
    19  	"fmt"
    20  	"os"
    21  	"path/filepath"
    22  	"strings"
    23  
    24  	gengo "google.golang.org/protobuf/cmd/protoc-gen-go/internal_gengo"
    25  	"google.golang.org/protobuf/compiler/protogen"
    26  	"google.golang.org/protobuf/proto"
    27  	"google.golang.org/protobuf/types/pluginpb"
    28  
    29  	"github.com/cloudwego/kitex/tool/internal_pkg/log"
    30  	"github.com/cloudwego/kitex/tool/internal_pkg/util"
    31  )
    32  
    33  // PluginName .
    34  const PluginName = "protoc-gen-kitex"
    35  
    36  // Run .
    37  func Run() int {
    38  	opts := protogen.Options{}
    39  	if err := run(opts); err != nil {
    40  		fmt.Fprintf(os.Stderr, "%s: %v\n", filepath.Base(os.Args[0]), err)
    41  		return 1
    42  	}
    43  	return 0
    44  }
    45  
    46  func run(opts protogen.Options) error {
    47  	// unmarshal request from stdin
    48  	in, err := util.ReadInput()
    49  	if err != nil {
    50  		return err
    51  	}
    52  	req := &pluginpb.CodeGeneratorRequest{}
    53  	if err := proto.Unmarshal(in, req); err != nil {
    54  		return err
    55  	}
    56  
    57  	// init plugin
    58  	pp := new(protocPlugin)
    59  	pp.init()
    60  	args := strings.Split(req.GetParameter(), ",")
    61  	err = pp.Unpack(args)
    62  	if err != nil {
    63  		return fmt.Errorf("%s: unpack args: %w", PluginName, err)
    64  	}
    65  
    66  	pp.parseM()
    67  
    68  	// unify go_package
    69  	pe := &pathElements{
    70  		module: pp.ModuleName,
    71  		prefix: pp.PackagePrefix,
    72  	}
    73  	for _, f := range req.ProtoFile {
    74  		if f == nil {
    75  			return errors.New("ERROR: got nil ProtoFile")
    76  		}
    77  
    78  		gopkg, ok := pp.importPaths[f.GetName()]
    79  		if ok {
    80  			f.Options.GoPackage = &gopkg
    81  			log.Infof("[INFO] option specified import path for %q: %q\n", f.GetName(), gopkg)
    82  		} else {
    83  			if f.Options == nil || f.Options.GoPackage == nil {
    84  				return fmt.Errorf("ERROR: go_package is missing in proto file %q", f.GetName())
    85  			}
    86  			gopkg = f.GetOptions().GetGoPackage()
    87  		}
    88  		if path, ok := pe.getImportPath(gopkg); ok {
    89  			f.Options.GoPackage = &path
    90  			log.Infof("[INFO] update import path for %q: %q -> %q\n", f.GetName(), gopkg, path)
    91  		}
    92  	}
    93  
    94  	// generate files
    95  	gen, err := opts.New(req)
    96  	if err != nil {
    97  		return err
    98  	}
    99  	pp.process(gen)
   100  	gen.SupportedFeatures = gengo.SupportedFeatures
   101  
   102  	// construct plugin response
   103  	resp := gen.Response()
   104  	out, err := proto.Marshal(resp)
   105  	if err != nil {
   106  		return err
   107  	}
   108  	if _, err := os.Stdout.Write(out); err != nil {
   109  		return err
   110  	}
   111  	return nil
   112  }