nebula graph分析

#组件

## [gflags](https://github.com/gflags/gflags)

## [glog](https://github.com/google/glog/blob/master/doc/glog.html)

##[fbthrift](https://github.com/facebook/fbthrift/blob/master/thrift/doc/Cpp2.md)

```c++

A service like the following

service TestService {

  string sendResponse(1:i64 size)

}

Will generate an interface similar to

class TestServiceSvIf : public TestServiceSvAsyncIf, public apache::thrift2::ServerInterface {

  ...

  virtual void sendResponse(std::string& _return, int64_t size);

  virtual void async_sendResponse(std::unique_ptr<apache::thrift2::HandlerCallback<std::unique_ptr<std::string>>> callback, int64_t size) = 0;

  virtual folly::Future<std::unique_ptr<std::string>> future_sendResponse(int64_t size);

  ...

}

```

##[readline](https://tiswww.case.edu/php/chet/readline/rltop.html#Availability)