go.uber.org/yarpc@v1.72.1/internal/protoplugin-v2/multi_runner.go (about)

     1  // Copyright (c) 2022 Uber Technologies, Inc.
     2  //
     3  // Permission is hereby granted, free of charge, to any person obtaining a copy
     4  // of this software and associated documentation files (the "Software"), to deal
     5  // in the Software without restriction, including without limitation the rights
     6  // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
     7  // copies of the Software, and to permit persons to whom the Software is
     8  // furnished to do so, subject to the following conditions:
     9  //
    10  // The above copyright notice and this permission notice shall be included in
    11  // all copies or substantial portions of the Software.
    12  //
    13  // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
    14  // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
    15  // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
    16  // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
    17  // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
    18  // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
    19  // THE SOFTWARE.
    20  
    21  package protopluginv2
    22  
    23  import (
    24  	"errors"
    25  	"fmt"
    26  	"sort"
    27  
    28  	"github.com/golang/protobuf/protoc-gen-go/plugin"
    29  	"go.uber.org/multierr"
    30  )
    31  
    32  var errNoFileName = errors.New("no name on CodeGeneratorResponse_File")
    33  
    34  type multiRunner struct {
    35  	runners []Runner
    36  }
    37  
    38  func newMultiRunner(runners ...Runner) *multiRunner {
    39  	return &multiRunner{runners: runners}
    40  }
    41  
    42  func (m *multiRunner) Run(request *plugin_go.CodeGeneratorRequest) *plugin_go.CodeGeneratorResponse {
    43  	nameToFile := make(map[string]*plugin_go.CodeGeneratorResponse_File)
    44  	var responseErr error
    45  	for _, runner := range m.runners {
    46  		response := runner.Run(request)
    47  		if responseErrString := response.GetError(); responseErrString != "" {
    48  			responseErr = multierr.Append(responseErr, errors.New(responseErrString))
    49  			continue
    50  		}
    51  		for _, file := range response.GetFile() {
    52  			name := file.GetName()
    53  			if name == "" {
    54  				return newResponseError(errNoFileName)
    55  			}
    56  			if _, ok := nameToFile[name]; ok {
    57  				return newResponseError(newErrorDuplicateFileName(name))
    58  			}
    59  			nameToFile[name] = file
    60  		}
    61  	}
    62  	if responseErr != nil {
    63  		return newResponseError(responseErr)
    64  	}
    65  	files := make([]*plugin_go.CodeGeneratorResponse_File, 0, len(nameToFile))
    66  	for _, file := range nameToFile {
    67  		files = append(files, file)
    68  	}
    69  	sort.Slice(files, func(i int, j int) bool { return files[i].GetName() < files[j].GetName() })
    70  	return newResponseFiles(files)
    71  }
    72  
    73  func newErrorDuplicateFileName(name string) error {
    74  	return fmt.Errorf("duplicate name for CodeGeneratorResponse_File: %s", name)
    75  }