func (g *Generator) generateFile(
file *descriptor.FileDescriptorProto,
) (content string, err error) {
descriptor := &fileDescriptor{
Package: file.GetPackage(),
Services: make([]*serviceDescriptor, len(file.Service)),
}
for i, service := range file.Service {
serviceDescriptor := &serviceDescriptor{
ServerInterface: fmt.Sprintf("%sServer", service.GetName()),
Methods: make([]*methodDescriptor, len(service.Method)),
}
for n, method := range service.Method {
serviceDescriptor.Methods[n] = &methodDescriptor{
Service: descriptor.Package,
ServerInterface: serviceDescriptor.ServerInterface,
Name: method.GetName(),
InputType: strings.Split(method.GetInputType(), ".")[2],
OutputType: strings.Split(method.GetOutputType(), ".")[2],
}
}
descriptor.Services[i] = serviceDescriptor
}
var buffer bytes.Buffer
if err := loggerTemplate.Execute(&buffer, descriptor); err != nil {
return "", err
}
return buffer.String(), nil
}
func fillTreeWithFile(tree *tree, file *descriptor.FileDescriptorProto) {
key := fmt.Sprintf(".%s", file.GetPackage())
locs := make(map[string]*descriptor.SourceCodeInfo_Location)
for _, loc := range file.GetSourceCodeInfo().GetLocation() {
if loc.LeadingComments == nil {
continue
}
var p []string
for _, n := range loc.Path {
p = append(p, strconv.Itoa(int(n)))
}
locs[strings.Join(p, ",")] = loc
}
// Messages
for idx, proto := range file.GetMessageType() {
fillTreeWithMessage(tree, key, proto, fmt.Sprintf("4,%d", idx), locs)
}
// Enums
for idx, proto := range file.GetEnumType() {
fillTreeWithEnum(tree, key, proto, fmt.Sprintf("5,%d", idx), locs)
}
// Services
for idx, proto := range file.GetService() {
fillTreeWithService(tree, key, proto, fmt.Sprintf("6,%d", idx), locs)
}
}
func getGoPackage(protoFile *descriptor.FileDescriptorProto) string {
if protoFile.Options != nil && protoFile.Options.GoPackage != nil {
return protoFile.Options.GetGoPackage()
}
if protoFile.Package == nil {
base := filepath.Base(protoFile.GetName())
ext := filepath.Ext(base)
return strings.TrimSuffix(base, ext)
}
return strings.Replace(protoFile.GetPackage(), ".", "_", -1)
}
// defaultGoPackageName returns the default go package name to be used for go files generated from "f".
// You might need to use an unique alias for the package when you import it. Use ReserveGoPackageAlias to get a unique alias.
func defaultGoPackageName(f *descriptor.FileDescriptorProto) string {
if f.Options != nil && f.Options.GoPackage != nil {
return f.Options.GetGoPackage()
}
if f.Package == nil {
base := filepath.Base(f.GetName())
ext := filepath.Ext(base)
return strings.TrimSuffix(base, ext)
}
return strings.Replace(f.GetPackage(), ".", "_", -1)
}
// packageIdentityName returns the identity of packages.
// protoc-gen-grpc-gateway rejects CodeGenerationRequests which contains more than one packages
// as protoc-gen-go does.
func packageIdentityName(f *descriptor.FileDescriptorProto) string {
if f.Options != nil && f.Options.GoPackage != nil {
return f.Options.GetGoPackage()
}
if f.Package == nil {
base := filepath.Base(f.GetName())
ext := filepath.Ext(base)
return strings.TrimSuffix(base, ext)
}
return f.GetPackage()
}
func getTmplData(protoFile *descriptor.FileDescriptorProto) (*tmplData, error) {
var messageDatas []*tmplMessageData
for _, messageType := range protoFile.MessageType {
var parents []string
messageDatas = getTmplMessageDatas(protoFile.GetPackage(), parents, messageType, messageDatas)
}
return &tmplData{
Name: protoFile.GetName(),
GoPackage: getGoPackage(protoFile),
MessageDatas: messageDatas,
}, nil
}
// PackageName returns the package name of the given file, which is either the
// result of f.GetPackage (a package set explicitly by the user) or the name of
// the file.
func PackageName(f *descriptor.FileDescriptorProto) string {
// Check for an explicit package name given by the user in a protobuf file as
//
// package foo;
//
if pkg := f.GetPackage(); len(pkg) > 0 {
return pkg
}
// Otherwise use the name of the file (note: not filepath.Base because
// protobuf only speaks in unix path terms).
pkg := path.Base(f.GetName())
return strings.TrimSuffix(pkg, path.Ext(pkg))
}
// packageIdentityName returns the identity of packages.
// protoc-gen-grpc-gateway rejects CodeGenerationRequests which contains more than one packages
// as protoc-gen-go does.
func packageIdentityName(f *descriptor.FileDescriptorProto) string {
if f.Options != nil && f.Options.GoPackage != nil {
gopkg := f.Options.GetGoPackage()
idx := strings.LastIndex(gopkg, "/")
if idx < 0 {
return gopkg
}
return gopkg[idx+1:]
}
if f.Package == nil {
base := filepath.Base(f.GetName())
ext := filepath.Ext(base)
return strings.TrimSuffix(base, ext)
}
return f.GetPackage()
}
func convertFile(file *descriptor.FileDescriptorProto) ([]*plugin.CodeGeneratorResponse_File, error) {
name := path.Base(file.GetName())
pkg, ok := globalPkg.relativelyLookupPackage(file.GetPackage())
if !ok {
return nil, fmt.Errorf("no such package found: %s", file.GetPackage())
}
response := []*plugin.CodeGeneratorResponse_File{}
for _, msg := range file.GetMessageType() {
options := msg.GetOptions()
if options == nil {
continue
}
if !proto.HasExtension(options, E_TableName) {
continue
}
optionValue, err := proto.GetExtension(options, E_TableName)
if err != nil {
return nil, err
}
tableName := *optionValue.(*string)
if len(tableName) == 0 {
return nil, fmt.Errorf("table name of %s cannot be empty", msg.GetName())
}
glog.V(2).Info("Generating schema for a message type ", msg.GetName())
schema, err := convertMessageType(pkg, msg)
if err != nil {
glog.Errorf("Failed to convert %s: %v", name, err)
return nil, err
}
jsonSchema, err := json.Marshal(schema)
if err != nil {
glog.Error("Failed to encode schema", err)
return nil, err
}
resFile := &plugin.CodeGeneratorResponse_File{
Name: proto.String(fmt.Sprintf("%s/%s.schema", strings.Replace(file.GetPackage(), ".", "/", -1), tableName)),
Content: proto.String(string(jsonSchema)),
}
response = append(response, resFile)
}
return response, nil
}