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 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
}
// loadFile loads messages and fiels from "file".
// It does not loads services and methods in "file". You need to call
// loadServices after loadFiles is called for all files to load services and methods.
func (r *Registry) loadFile(file *descriptor.FileDescriptorProto) {
pkg := GoPackage{
Path: r.goPackagePath(file),
Name: defaultGoPackageName(file),
}
if err := r.ReserveGoPackageAlias(pkg.Name, pkg.Path); err != nil {
for i := 0; ; i++ {
alias := fmt.Sprintf("%s_%d", pkg.Name, i)
if err := r.ReserveGoPackageAlias(alias, pkg.Path); err == nil {
pkg.Alias = alias
break
}
}
}
f := &File{
FileDescriptorProto: file,
GoPkg: pkg,
}
r.files[file.GetName()] = f
r.registerMsg(f, nil, file.GetMessageType())
}
// loadFile loads messages and fiels from "file".
// It does not loads services and methods in "file". You need to call
// loadServices after loadFiles is called for all files to load services and methods.
func (r *Registry) loadFile(file *descriptor.FileDescriptorProto) {
pkg := GoPackage{
Path: r.goPackagePath(file),
Name: defaultGoPackageName(file),
}
if err := r.ReserveGoPackageAlias(pkg.Name, pkg.Path); err != nil {
for i := 0; ; i++ {
alias := fmt.Sprintf("%s_%d", pkg.Name, i)
if err := r.ReserveGoPackageAlias(alias, pkg.Path); err == nil {
pkg.Alias = alias
break
}
}
}
comments := make(map[string]*descriptor.SourceCodeInfo_Location)
for _, loc := range file.GetSourceCodeInfo().GetLocation() {
if loc.LeadingComments == nil && loc.TrailingComments == nil {
continue
}
var p []string
for _, n := range loc.Path {
p = append(p, strconv.Itoa(int(n)))
}
comments[strings.Join(p, ",")] = loc
}
f := &File{
FileDescriptorProto: file,
GoPkg: pkg,
Comments: comments,
}
r.files[file.GetName()] = f
r.registerMsg(f, nil, nil, file.GetMessageType())
}
// LintProtoFile takes a file name, proto file description, and a file.
// It checks the file for errors and writes them to the output file
func LintProtoFile(
protoFile *descriptor.FileDescriptorProto,
outFile io.WriteCloser,
) (int, error) {
var (
errors = protoBufErrors{}
protoSource = protoFile.GetSourceCodeInfo()
)
for i, v := range protoFile.GetMessageType() {
errors.lintProtoMessage(int32(i), pathMessage, []int32{}, v)
}
for i, v := range protoFile.GetEnumType() {
errors.lintProtoEnumType(int32(i), pathEnumType, []int32{}, v)
}
for i, v := range protoFile.GetService() {
errors.lintProtoService(int32(i), v)
}
for _, v := range errors {
line, col := v.getSourceLineNumber(protoSource)
fmt.Fprintf(
outFile,
"%s:%d:%d: '%s' - %s\n",
*protoFile.Name,
line,
col,
v.errorString,
linterErrors[v.errorCode],
)
}
return len(errors), nil
}
func processFile(inFile *descriptor.FileDescriptorProto) (*plugin.CodeGeneratorResponse_File, error) {
if inFile.GetSyntax() != "proto3" {
return nil, fmt.Errorf("Only proto3 syntax is supported")
}
outFile := &plugin.CodeGeneratorResponse_File{}
inFilePath := inFile.GetName()
inFileDir, inFileName := filepath.Split(inFilePath)
shortModuleName := firstUpper(strings.TrimSuffix(inFileName, ".proto"))
fullModuleName := ""
outFileName := ""
for _, segment := range strings.Split(inFileDir, "/") {
if segment == "" {
continue
}
fullModuleName += firstUpper(segment) + "."
outFileName += firstUpper(segment) + "/"
}
fullModuleName += shortModuleName
outFileName += shortModuleName + ".elm"
outFile.Name = proto.String(outFileName)
b := &bytes.Buffer{}
fg := NewFileGenerator(b)
fg.GenerateModule(fullModuleName)
fg.GenerateImports()
fg.GenerateRuntime()
var err error
// Top-level enums.
for _, inEnum := range inFile.GetEnumType() {
err = fg.GenerateEnumDefinition("", inEnum)
if err != nil {
return nil, err
}
err = fg.GenerateEnumDecoder("", inEnum)
if err != nil {
return nil, err
}
err = fg.GenerateEnumEncoder("", inEnum)
if err != nil {
return nil, err
}
}
// Top-level messages.
for _, inMessage := range inFile.GetMessageType() {
err = fg.GenerateEverything("", inMessage)
if err != nil {
return nil, err
}
}
outFile.Content = proto.String(b.String())
return outFile, nil
}
