| // Licensed to the Apache Software Foundation (ASF) under one |
| // or more contributor license agreements. See the NOTICE file |
| // distributed with this work for additional information |
| // regarding copyright ownership. The ASF licenses this file |
| // to you under the Apache License, Version 2.0 (the |
| // "License"); you may not use this file except in compliance |
| // with the License. You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, |
| // software distributed under the License is distributed on an |
| // "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| // KIND, either express or implied. See the License for the |
| // specific language governing permissions and limitations |
| // under the License. |
| // |
| // Simple protoc plugin which inserts some code at the top of each generated protobuf. |
| // Currently, this just adds an include of protobuf-annotations.h, a file which hooks up |
| // the protobuf concurrency annotations to our TSAN annotations. |
| |
| #include <string> |
| |
| #include <google/protobuf/compiler/code_generator.h> |
| #include <google/protobuf/compiler/plugin.h> |
| #include <google/protobuf/descriptor.h> |
| #include <google/protobuf/io/printer.h> |
| #include <google/protobuf/io/zero_copy_stream.h> |
| |
| #include "kudu/gutil/gscoped_ptr.h" |
| #include "kudu/gutil/port.h" |
| #include "kudu/gutil/strings/strip.h" |
| #include "kudu/gutil/strings/substitute.h" |
| |
| using google::protobuf::io::ZeroCopyOutputStream; |
| using google::protobuf::io::Printer; |
| using std::string; |
| |
| namespace kudu { |
| |
| static const char* const kIncludeToInsert = "#include \"kudu/util/protobuf-annotations.h\"\n"; |
| static const char* const kProtoExtension = ".proto"; |
| |
| class InsertAnnotations : public ::google::protobuf::compiler::CodeGenerator { |
| virtual bool Generate(const google::protobuf::FileDescriptor *file, |
| const std::string &/*param*/, |
| google::protobuf::compiler::GeneratorContext *gen_context, |
| std::string *error) const OVERRIDE { |
| |
| // Determine the file name we will substitute into. |
| string path_no_extension; |
| if (!TryStripSuffixString(file->name(), kProtoExtension, &path_no_extension)) { |
| *error = strings::Substitute("file name $0 did not end in $1", file->name(), kProtoExtension); |
| return false; |
| } |
| string pb_file = path_no_extension + ".pb.cc"; |
| |
| // Actually insert the new #include |
| gscoped_ptr<ZeroCopyOutputStream> inserter(gen_context->OpenForInsert(pb_file, "includes")); |
| Printer printer(inserter.get(), '$'); |
| printer.Print(kIncludeToInsert); |
| |
| if (printer.failed()) { |
| *error = "Failed to print to output file"; |
| return false; |
| } |
| |
| return true; |
| } |
| }; |
| |
| } // namespace kudu |
| |
| int main(int argc, char *argv[]) { |
| kudu::InsertAnnotations generator; |
| return google::protobuf::compiler::PluginMain(argc, argv, &generator); |
| } |