[VOL-4291] OfAgent changes for gRPC migration
Change-Id: I8da1db6df49d478ef24ec8f9bd719e9692f48a7f
diff --git a/vendor/google.golang.org/protobuf/reflect/protodesc/desc.go b/vendor/google.golang.org/protobuf/reflect/protodesc/desc.go
new file mode 100644
index 0000000..e4dfb12
--- /dev/null
+++ b/vendor/google.golang.org/protobuf/reflect/protodesc/desc.go
@@ -0,0 +1,276 @@
+// Copyright 2018 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Package protodesc provides functionality for converting
+// FileDescriptorProto messages to/from protoreflect.FileDescriptor values.
+//
+// The google.protobuf.FileDescriptorProto is a protobuf message that describes
+// the type information for a .proto file in a form that is easily serializable.
+// The protoreflect.FileDescriptor is a more structured representation of
+// the FileDescriptorProto message where references and remote dependencies
+// can be directly followed.
+package protodesc
+
+import (
+ "google.golang.org/protobuf/internal/errors"
+ "google.golang.org/protobuf/internal/filedesc"
+ "google.golang.org/protobuf/internal/pragma"
+ "google.golang.org/protobuf/internal/strs"
+ "google.golang.org/protobuf/proto"
+ "google.golang.org/protobuf/reflect/protoreflect"
+ "google.golang.org/protobuf/reflect/protoregistry"
+
+ "google.golang.org/protobuf/types/descriptorpb"
+)
+
+// Resolver is the resolver used by NewFile to resolve dependencies.
+// The enums and messages provided must belong to some parent file,
+// which is also registered.
+//
+// It is implemented by protoregistry.Files.
+type Resolver interface {
+ FindFileByPath(string) (protoreflect.FileDescriptor, error)
+ FindDescriptorByName(protoreflect.FullName) (protoreflect.Descriptor, error)
+}
+
+// FileOptions configures the construction of file descriptors.
+type FileOptions struct {
+ pragma.NoUnkeyedLiterals
+
+ // AllowUnresolvable configures New to permissively allow unresolvable
+ // file, enum, or message dependencies. Unresolved dependencies are replaced
+ // by placeholder equivalents.
+ //
+ // The following dependencies may be left unresolved:
+ // • Resolving an imported file.
+ // • Resolving the type for a message field or extension field.
+ // If the kind of the field is unknown, then a placeholder is used for both
+ // the Enum and Message accessors on the protoreflect.FieldDescriptor.
+ // • Resolving an enum value set as the default for an optional enum field.
+ // If unresolvable, the protoreflect.FieldDescriptor.Default is set to the
+ // first value in the associated enum (or zero if the also enum dependency
+ // is also unresolvable). The protoreflect.FieldDescriptor.DefaultEnumValue
+ // is populated with a placeholder.
+ // • Resolving the extended message type for an extension field.
+ // • Resolving the input or output message type for a service method.
+ //
+ // If the unresolved dependency uses a relative name,
+ // then the placeholder will contain an invalid FullName with a "*." prefix,
+ // indicating that the starting prefix of the full name is unknown.
+ AllowUnresolvable bool
+}
+
+// NewFile creates a new protoreflect.FileDescriptor from the provided
+// file descriptor message. See FileOptions.New for more information.
+func NewFile(fd *descriptorpb.FileDescriptorProto, r Resolver) (protoreflect.FileDescriptor, error) {
+ return FileOptions{}.New(fd, r)
+}
+
+// NewFiles creates a new protoregistry.Files from the provided
+// FileDescriptorSet message. See FileOptions.NewFiles for more information.
+func NewFiles(fd *descriptorpb.FileDescriptorSet) (*protoregistry.Files, error) {
+ return FileOptions{}.NewFiles(fd)
+}
+
+// New creates a new protoreflect.FileDescriptor from the provided
+// file descriptor message. The file must represent a valid proto file according
+// to protobuf semantics. The returned descriptor is a deep copy of the input.
+//
+// Any imported files, enum types, or message types referenced in the file are
+// resolved using the provided registry. When looking up an import file path,
+// the path must be unique. The newly created file descriptor is not registered
+// back into the provided file registry.
+func (o FileOptions) New(fd *descriptorpb.FileDescriptorProto, r Resolver) (protoreflect.FileDescriptor, error) {
+ if r == nil {
+ r = (*protoregistry.Files)(nil) // empty resolver
+ }
+
+ // Handle the file descriptor content.
+ f := &filedesc.File{L2: &filedesc.FileL2{}}
+ switch fd.GetSyntax() {
+ case "proto2", "":
+ f.L1.Syntax = protoreflect.Proto2
+ case "proto3":
+ f.L1.Syntax = protoreflect.Proto3
+ default:
+ return nil, errors.New("invalid syntax: %q", fd.GetSyntax())
+ }
+ f.L1.Path = fd.GetName()
+ if f.L1.Path == "" {
+ return nil, errors.New("file path must be populated")
+ }
+ f.L1.Package = protoreflect.FullName(fd.GetPackage())
+ if !f.L1.Package.IsValid() && f.L1.Package != "" {
+ return nil, errors.New("invalid package: %q", f.L1.Package)
+ }
+ if opts := fd.GetOptions(); opts != nil {
+ opts = proto.Clone(opts).(*descriptorpb.FileOptions)
+ f.L2.Options = func() protoreflect.ProtoMessage { return opts }
+ }
+
+ f.L2.Imports = make(filedesc.FileImports, len(fd.GetDependency()))
+ for _, i := range fd.GetPublicDependency() {
+ if !(0 <= i && int(i) < len(f.L2.Imports)) || f.L2.Imports[i].IsPublic {
+ return nil, errors.New("invalid or duplicate public import index: %d", i)
+ }
+ f.L2.Imports[i].IsPublic = true
+ }
+ for _, i := range fd.GetWeakDependency() {
+ if !(0 <= i && int(i) < len(f.L2.Imports)) || f.L2.Imports[i].IsWeak {
+ return nil, errors.New("invalid or duplicate weak import index: %d", i)
+ }
+ f.L2.Imports[i].IsWeak = true
+ }
+ imps := importSet{f.Path(): true}
+ for i, path := range fd.GetDependency() {
+ imp := &f.L2.Imports[i]
+ f, err := r.FindFileByPath(path)
+ if err == protoregistry.NotFound && (o.AllowUnresolvable || imp.IsWeak) {
+ f = filedesc.PlaceholderFile(path)
+ } else if err != nil {
+ return nil, errors.New("could not resolve import %q: %v", path, err)
+ }
+ imp.FileDescriptor = f
+
+ if imps[imp.Path()] {
+ return nil, errors.New("already imported %q", path)
+ }
+ imps[imp.Path()] = true
+ }
+ for i := range fd.GetDependency() {
+ imp := &f.L2.Imports[i]
+ imps.importPublic(imp.Imports())
+ }
+
+ // Handle source locations.
+ f.L2.Locations.File = f
+ for _, loc := range fd.GetSourceCodeInfo().GetLocation() {
+ var l protoreflect.SourceLocation
+ // TODO: Validate that the path points to an actual declaration?
+ l.Path = protoreflect.SourcePath(loc.GetPath())
+ s := loc.GetSpan()
+ switch len(s) {
+ case 3:
+ l.StartLine, l.StartColumn, l.EndLine, l.EndColumn = int(s[0]), int(s[1]), int(s[0]), int(s[2])
+ case 4:
+ l.StartLine, l.StartColumn, l.EndLine, l.EndColumn = int(s[0]), int(s[1]), int(s[2]), int(s[3])
+ default:
+ return nil, errors.New("invalid span: %v", s)
+ }
+ // TODO: Validate that the span information is sensible?
+ // See https://github.com/protocolbuffers/protobuf/issues/6378.
+ if false && (l.EndLine < l.StartLine || l.StartLine < 0 || l.StartColumn < 0 || l.EndColumn < 0 ||
+ (l.StartLine == l.EndLine && l.EndColumn <= l.StartColumn)) {
+ return nil, errors.New("invalid span: %v", s)
+ }
+ l.LeadingDetachedComments = loc.GetLeadingDetachedComments()
+ l.LeadingComments = loc.GetLeadingComments()
+ l.TrailingComments = loc.GetTrailingComments()
+ f.L2.Locations.List = append(f.L2.Locations.List, l)
+ }
+
+ // Step 1: Allocate and derive the names for all declarations.
+ // This copies all fields from the descriptor proto except:
+ // google.protobuf.FieldDescriptorProto.type_name
+ // google.protobuf.FieldDescriptorProto.default_value
+ // google.protobuf.FieldDescriptorProto.oneof_index
+ // google.protobuf.FieldDescriptorProto.extendee
+ // google.protobuf.MethodDescriptorProto.input
+ // google.protobuf.MethodDescriptorProto.output
+ var err error
+ sb := new(strs.Builder)
+ r1 := make(descsByName)
+ if f.L1.Enums.List, err = r1.initEnumDeclarations(fd.GetEnumType(), f, sb); err != nil {
+ return nil, err
+ }
+ if f.L1.Messages.List, err = r1.initMessagesDeclarations(fd.GetMessageType(), f, sb); err != nil {
+ return nil, err
+ }
+ if f.L1.Extensions.List, err = r1.initExtensionDeclarations(fd.GetExtension(), f, sb); err != nil {
+ return nil, err
+ }
+ if f.L1.Services.List, err = r1.initServiceDeclarations(fd.GetService(), f, sb); err != nil {
+ return nil, err
+ }
+
+ // Step 2: Resolve every dependency reference not handled by step 1.
+ r2 := &resolver{local: r1, remote: r, imports: imps, allowUnresolvable: o.AllowUnresolvable}
+ if err := r2.resolveMessageDependencies(f.L1.Messages.List, fd.GetMessageType()); err != nil {
+ return nil, err
+ }
+ if err := r2.resolveExtensionDependencies(f.L1.Extensions.List, fd.GetExtension()); err != nil {
+ return nil, err
+ }
+ if err := r2.resolveServiceDependencies(f.L1.Services.List, fd.GetService()); err != nil {
+ return nil, err
+ }
+
+ // Step 3: Validate every enum, message, and extension declaration.
+ if err := validateEnumDeclarations(f.L1.Enums.List, fd.GetEnumType()); err != nil {
+ return nil, err
+ }
+ if err := validateMessageDeclarations(f.L1.Messages.List, fd.GetMessageType()); err != nil {
+ return nil, err
+ }
+ if err := validateExtensionDeclarations(f.L1.Extensions.List, fd.GetExtension()); err != nil {
+ return nil, err
+ }
+
+ return f, nil
+}
+
+type importSet map[string]bool
+
+func (is importSet) importPublic(imps protoreflect.FileImports) {
+ for i := 0; i < imps.Len(); i++ {
+ if imp := imps.Get(i); imp.IsPublic {
+ is[imp.Path()] = true
+ is.importPublic(imp.Imports())
+ }
+ }
+}
+
+// NewFiles creates a new protoregistry.Files from the provided
+// FileDescriptorSet message. The descriptor set must include only
+// valid files according to protobuf semantics. The returned descriptors
+// are a deep copy of the input.
+func (o FileOptions) NewFiles(fds *descriptorpb.FileDescriptorSet) (*protoregistry.Files, error) {
+ files := make(map[string]*descriptorpb.FileDescriptorProto)
+ for _, fd := range fds.File {
+ if _, ok := files[fd.GetName()]; ok {
+ return nil, errors.New("file appears multiple times: %q", fd.GetName())
+ }
+ files[fd.GetName()] = fd
+ }
+ r := &protoregistry.Files{}
+ for _, fd := range files {
+ if err := o.addFileDeps(r, fd, files); err != nil {
+ return nil, err
+ }
+ }
+ return r, nil
+}
+func (o FileOptions) addFileDeps(r *protoregistry.Files, fd *descriptorpb.FileDescriptorProto, files map[string]*descriptorpb.FileDescriptorProto) error {
+ // Set the entry to nil while descending into a file's dependencies to detect cycles.
+ files[fd.GetName()] = nil
+ for _, dep := range fd.Dependency {
+ depfd, ok := files[dep]
+ if depfd == nil {
+ if ok {
+ return errors.New("import cycle in file: %q", dep)
+ }
+ continue
+ }
+ if err := o.addFileDeps(r, depfd, files); err != nil {
+ return err
+ }
+ }
+ // Delete the entry once dependencies are processed.
+ delete(files, fd.GetName())
+ f, err := o.New(fd, r)
+ if err != nil {
+ return err
+ }
+ return r.RegisterFile(f)
+}