github.com/nikron/prototool@v1.3.0/internal/desc/desc.go (about)

     1  // Copyright (c) 2018 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 desc
    22  
    23  import (
    24  	"fmt"
    25  
    26  	"github.com/golang/protobuf/protoc-gen-go/descriptor"
    27  )
    28  
    29  // SortFileDescriptorSet sorts a FileDescriptorSet for github.com/jhump/protoreflect
    30  // by returning a new FileDescriptorSet with the given FileDescriptorProto at the end.
    31  // This also verifies that all FileDescriptorProto names are unique and the name of the
    32  // FileDescriptorProto is within the FileDescriptorSet.
    33  func SortFileDescriptorSet(fileDescriptorSet *descriptor.FileDescriptorSet, fileDescriptorProto *descriptor.FileDescriptorProto) (*descriptor.FileDescriptorSet, error) {
    34  	// best-effort checks
    35  	names := make(map[string]struct{}, len(fileDescriptorSet.File))
    36  	for _, iFileDescriptorProto := range fileDescriptorSet.File {
    37  		if iFileDescriptorProto.GetName() == "" {
    38  			return nil, fmt.Errorf("no name on FileDescriptorProto")
    39  		}
    40  		if _, ok := names[iFileDescriptorProto.GetName()]; ok {
    41  			return nil, fmt.Errorf("duplicate FileDescriptorProto in FileDescriptorSet: %s", iFileDescriptorProto.GetName())
    42  		}
    43  		names[iFileDescriptorProto.GetName()] = struct{}{}
    44  	}
    45  	if _, ok := names[fileDescriptorProto.GetName()]; !ok {
    46  		return nil, fmt.Errorf("no FileDescriptorProto named %s in FileDescriptorSet with names %v", fileDescriptorProto.GetName(), names)
    47  	}
    48  	newFileDescriptorSet := &descriptor.FileDescriptorSet{}
    49  	for _, iFileDescriptorProto := range fileDescriptorSet.File {
    50  		if iFileDescriptorProto.GetName() != fileDescriptorProto.GetName() {
    51  			newFileDescriptorSet.File = append(newFileDescriptorSet.File, iFileDescriptorProto)
    52  		}
    53  	}
    54  	newFileDescriptorSet.File = append(newFileDescriptorSet.File, fileDescriptorProto)
    55  	return newFileDescriptorSet, nil
    56  }