Method start

Source/cmWorkerPool.cxx:204–308

}

bool cmUVReadOnlyProcess::start(uv_loop_t* uv_loop,
                                std::function<void()> finishedCallback)
{
  if (this->IsStarted() || !this->Result()) {
    return false;
  }

  // Reset result before the start
  this->Result()->reset();

  // Fill command string pointers
  if (!this->Setup().Command.empty()) {
    this->CommandPtr_.reserve(this->Setup().Command.size() + 1);
    for (std::string const& arg : this->Setup().Command) {
      this->CommandPtr_.push_back(arg.c_str());
    }
    this->CommandPtr_.push_back(nullptr);
  } else {
    this->Result()->ErrorMessage = "Empty command";
  }

  if (!this->Result()->error()) {
    if (!this->UVPipeOut_.init(uv_loop)) {
      this->Result()->ErrorMessage = "libuv stdout pipe initialization failed";
    }
  }
  if (!this->Result()->error()) {
    if (!this->UVPipeErr_.init(uv_loop)) {
      this->Result()->ErrorMessage = "libuv stderr pipe initialization failed";
    }
  }
  if (!this->Result()->error()) {
    // -- Setup process stdio options
    // stdin
    this->UVOptionsStdIO_[0].flags = UV_IGNORE;
    this->UVOptionsStdIO_[0].data.stream = nullptr;
    // stdout
    this->UVOptionsStdIO_[1].flags =
      static_cast<uv_stdio_flags>(UV_CREATE_PIPE | UV_WRITABLE_PIPE);
    this->UVOptionsStdIO_[1].data.stream = this->UVPipeOut_.uv_stream();
    // stderr
    this->UVOptionsStdIO_[2].flags =
      static_cast<uv_stdio_flags>(UV_CREATE_PIPE | UV_WRITABLE_PIPE);
    this->UVOptionsStdIO_[2].data.stream = this->UVPipeErr_.uv_stream();

    // -- Setup process options
    std::fill_n(reinterpret_cast<char*>(&this->UVOptions_),
                sizeof(this->UVOptions_), 0);
    this->UVOptions_.exit_cb = &cmUVReadOnlyProcess::UVExit;
    this->UVOptions_.file = this->CommandPtr_[0];
    this->UVOptions_.args = const_cast<char**>(this->CommandPtr_.data());
    this->UVOptions_.cwd = this->Setup_.WorkingDirectory.c_str();
    this->UVOptions_.flags = UV_PROCESS_WINDOWS_HIDE;
#if UV_VERSION_MAJOR > 1 || !defined(CMAKE_USE_SYSTEM_LIBUV)
    this->UVOptions_.flags |= UV_PROCESS_WINDOWS_USE_PARENT_ERROR_MODE;
#endif
    this->UVOptions_.stdio_count =
      static_cast<int>(this->UVOptionsStdIO_.size());