[Bug] Examples Appear Broken

[Carter12s]

Describe the bug

Appears to be a result of #131?

The ros1_sub and ros1_pub examples do not appear to work as intended.

Focusing on the ros1_pub example.

When running I get the following:

Starting ROS1 Master...Starting Bridge... OK!
Creating ROS1 Node... OK!
Creating ROS1 Publisher... OK!
Creating Zenoh Session... OK!
Creating Zenoh Subscriber... OK!
Running bridge, press Ctrl+C to exit...
ROS Publisher: publishing data...
ROS Publisher: publishing data...
ROS Publisher: publishing data...
ROS Publisher: publishing data...
ROS Publisher: publishing data...
ROS Publisher: publishing data...
^C

The line "Zenoh Subscriber: got data!" never appears indicating the example is not bridging correctly.

For the ros1_sub example, the behavior is the same but reversed. The ros1 subscriber never receives the publishes from the zenoh publish, and rostopic hz can be used to confirm that no messages are making it to ros.

To reproduce

1. Follow the source installation instruction from README
2. cargo run --example ros1_pub

Tested on current main: 44bb957a4358f53e80336dfeeab206e68c76b542

System info

• Platform: Host is Ubuntu 20.04, running inside a docker image that is also based off of Ubuntu 20.04
  Tested on current main: 44bb957a4358f53e80336dfeeab206e68c76b542

[Carter12s]

Note I worked around this by building a wrapper crate relying on roslibrust's message generation tools to provide Type strings and MD5Sum information:

RosLibRust/roslibrust#209

Still working on it in this MR, but it at least provides and example of a workaround.