| // Copyright 2022 The Bazel Authors. All rights reserved. |
| // |
| // 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 |
| // |
| // 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. |
| |
| #include <fstream> |
| #include <string> |
| |
| // This is a replacement for |
| // third_party/bazel/src/main/java/com/google/devtools/build/lib/analysis/actions/LauncherFileWriteAction.java |
| // |
| // It takes exactly 3 arguments: |
| // 1) The path to the actual launcher executable |
| // 2) The multi-line .params file containing the launcher info data |
| // 3) The path of the output executable |
| // |
| // The program copies the launcher executable as is to the output, and then |
| // appends each line of the launch info as a null-terminated string. At the |
| // end, the size of the launch data written is appended as a long value (8 |
| // bytes). |
| int main(int argc, char** argv) { |
| char* launcher_path = argv[1]; |
| char* info_params = argv[2]; |
| char* output_path = argv[3]; |
| |
| std::ifstream src(launcher_path, std::ios::binary); |
| std::ofstream dst(output_path, std::ios::binary); |
| dst << src.rdbuf(); |
| |
| std::ifstream info_file(info_params); |
| int64_t bytes = 0; |
| std::string line; |
| while (std::getline(info_file, line)) { |
| dst << line; |
| bytes += line.length(); |
| dst << '\0'; |
| bytes++; |
| } |
| |
| dst.write(reinterpret_cast<const char*>(&bytes), sizeof(bytes)); |
| return 0; |
| } |