how to convert .idl file to .proto file

[jackiearcobaleno]

I got the package and colcon build it.
But I cannot find the proto file in the workspace.
On continue, I find it use the rosidl_adaptor_proto to generate files, but it need argument with "--generator-arguments-file" that I cannot GET it.
Please show the detail step.
Thank You!

@FlorianReimold

[FlorianReimold]

The proto files are only intermediate files for this type-support. You should find them by searching your build directory for proto files. I think the command line to do that from terminal should be
find . -name "*proto" -type f

[jackiearcobaleno]

The proto files are only intermediate files for this type-support. You should find them by searching your build directory for proto files. I think the command line to do that from terminal should be find . -name "*proto" -type f

Thanks for the reply. Now I can exchange ros2 message with ecal protobuf message by the type-support and rmw_ecal.
I don't known can it convert the ros2 native message format to proto format，such as std_msgs，sensor_msgs and etc.

[FlorianReimold]

Sure, this works for any ROS2 message. When using the protobuf typesupport in a ROS2 project it even is required to "convert" all the standard messages that you are using, because ROS2 doesn't ship with them.

[tfoote]

As of #31 there is now automatically generated Type Adapter functions which will convert between ROS native datatypes and the Proto in memory datatypes.