syntax = "proto3";

package udpa.annotations;

import "google/protobuf/descriptor.proto";

// Magic number in this file derived from top 28bit of SHA256 digest of
// "udpa.annotation.migrate".

extend google.protobuf.MessageOptions {
  MigrateAnnotation message_migrate = 171962766;
}

extend google.protobuf.FieldOptions {
  FieldMigrateAnnotation field_migrate = 171962766;
}

extend google.protobuf.EnumOptions {
  MigrateAnnotation enum_migrate = 171962766;
}

extend google.protobuf.EnumValueOptions {
  MigrateAnnotation enum_value_migrate = 171962766;
}

extend google.protobuf.FileOptions {
  FileMigrateAnnotation file_migrate = 171962766;
}

message MigrateAnnotation {
  // Rename the message/enum/enum value in next version.
  string rename = 1;
}

message FieldMigrateAnnotation {
  // Rename the field in next version.
  string rename = 1;

  // Add the field to a named oneof in next version. If this already exists, the
  // field will join its siblings under the oneof, otherwise a new oneof will be
  // created with the given name.
  string oneof_promotion = 2;
}

message FileMigrateAnnotation {
  // Move all types in the file to another package, this implies changing proto
  // file path.
  string move_to_package = 2;
}
