Function cmVariableWatchCommand

Source/cmVariableWatchCommand.cxx:123–155

} // anonymous namespace

bool cmVariableWatchCommand(std::vector<std::string> const& args,
                            cmExecutionStatus& status)
{
  if (args.empty()) {
    status.SetError("must be called with at least one argument.");
    return false;
  }
  std::string const& variable = args[0];
  std::string command;
  if (args.size() > 1) {
    command = args[1];
  }
  if (variable == "CMAKE_CURRENT_LIST_FILE") {
    status.SetError(cmStrCat("cannot be set on the variable: ", variable));
    return false;
  }

  auto* const data = new cmVariableWatchCallbackData;

  data->InCallback = false;
  data->Command = std::move(command);

  if (!status.GetMakefile().GetCMakeInstance()->GetVariableWatch()->AddWatch(
        variable, cmVariableWatchCommandVariableAccessed, data,
        deleteVariableWatchCallbackData)) {
    deleteVariableWatchCallbackData(data);
    return false;
  }

  status.GetMakefile().AddGeneratorAction(
    FinalAction{ &status.GetMakefile(), variable });
  return true;
}