| #!/usr/bin/env python3 |
| # Copyright 2020 The Pigweed Authors |
| # |
| # Licensed 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 |
| # |
| # https://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. |
| """pw_protobuf compiler plugin. |
| |
| This file implements a protobuf compiler plugin which generates C++ headers for |
| protobuf messages in the pw_protobuf format. |
| """ |
| |
| import sys |
| |
| import google.protobuf.compiler.plugin_pb2 as plugin_pb2 |
| |
| import pw_protobuf.codegen_pwpb as codegen_pwpb |
| |
| |
| def process_proto_request(req: plugin_pb2.CodeGeneratorRequest, |
| res: plugin_pb2.CodeGeneratorResponse) -> None: |
| """Handles a protoc CodeGeneratorRequest message. |
| |
| Generates code for the files in the request and writes the output to the |
| specified CodeGeneratorResponse message. |
| |
| Args: |
| req: A CodeGeneratorRequest for a proto compilation. |
| res: A CodeGeneratorResponse to populate with the plugin's output. |
| """ |
| for proto_file in req.proto_file: |
| output_files = codegen_pwpb.process_proto_file(proto_file) |
| for output_file in output_files: |
| fd = res.file.add() |
| fd.name = output_file.name() |
| fd.content = output_file.content() |
| |
| |
| def main() -> int: |
| """Protobuf compiler plugin entrypoint. |
| |
| Reads a CodeGeneratorRequest proto from stdin and writes a |
| CodeGeneratorResponse to stdout. |
| """ |
| data = sys.stdin.buffer.read() |
| request = plugin_pb2.CodeGeneratorRequest.FromString(data) |
| response = plugin_pb2.CodeGeneratorResponse() |
| process_proto_request(request, response) |
| sys.stdout.buffer.write(response.SerializeToString()) |
| return 0 |
| |
| |
| if __name__ == '__main__': |
| sys.exit(main()) |