Function cmVariableWatchCommandVariableAccessed

Source/cmVariableWatchCommand.cxx:28–78

};

void cmVariableWatchCommandVariableAccessed(std::string const& variable,
                                            int access_type, void* client_data,
                                            char const* newValue,
                                            cmMakefile const* mf)
{
  cmVariableWatchCallbackData* data =
    static_cast<cmVariableWatchCallbackData*>(client_data);

  if (data->InCallback) {
    return;
  }
  data->InCallback = true;

  auto accessString = cmVariableWatch::GetAccessAsString(access_type);

  /// Ultra bad!!
  cmMakefile* makefile = const_cast<cmMakefile*>(mf);

  std::string stack = *mf->GetProperty("LISTFILE_STACK");
  if (!data->Command.empty()) {
    cmValue const currentListFile =
      mf->GetDefinition("CMAKE_CURRENT_LIST_FILE");
    auto const fakeLineNo =
      std::numeric_limits<decltype(cmListFileArgument::Line)>::max();

    std::vector<cmListFileArgument> newLFFArgs{
      { variable, cmListFileArgument::Quoted, fakeLineNo },
      { accessString, cmListFileArgument::Quoted, fakeLineNo },
      { newValue ? newValue : "", cmListFileArgument::Quoted, fakeLineNo },
      { *currentListFile, cmListFileArgument::Quoted, fakeLineNo },
      { stack, cmListFileArgument::Quoted, fakeLineNo }
    };

    cmListFileFunction newLFF{ data->Command, fakeLineNo, fakeLineNo,
                               std::move(newLFFArgs) };
    cmExecutionStatus status(*makefile);
    if (!makefile->ExecuteCommand(newLFF, status)) {
      cmSystemTools::Error(
        cmStrCat("Error in cmake code at\nUnknown:0:\nA command failed "
                 "during the invocation of callback \"",
                 data->Command, "\"."));
    }
  } else {
    makefile->IssueMessage(
      MessageType::LOG,
      cmStrCat("Variable \"", variable, "\" was accessed using ", accessString,
               " with value \"", (newValue ? newValue : ""), "\"."));
  }

  data->InCallback = false;
}

void deleteVariableWatchCallbackData(void* client_data)
{