self-defined messages not able to included in header file

[bobd988]

For self-defined ROS2 msg , after adding to AMENT_PREFIX_PATH , and then run cargo build the msg was not inlcuded in the bindings header file.

The expected behavior is to having the message to be included in bindings header file if ROS2 msg folder was added AMENT_PREFIX_PATH . By the way the msg folder by default has no idl file. Is idl file needed in order to make this work?

I was running this command after adding msg to AMENT_PREFIX_PATH

export RMW_IMPLEMENTATION=rmw_fastrtps_cpp
cargo run --example cxx-ros2-dataflow --features ros2-examples

[phil-opp]

Our current message generator looks at the files in share/ament_index/resource_index/rosidl_interfaces to find all available messages. Then it looks up the listed messages in share/<namespace>/msg/<name>.msg. I think we could skip the lookup in rosidl_interfaces and look for the message files directly.

I'm not familiar with self-defined ROS2 messages. Could you give some details on the directory structure so that I can update the message generator to work for your case?

[haixuanTao]

It seems that we also need to modify: `share/ament_index/resource_index/rosidl_interfaces"; See:

dora/libraries/extensions/ros2-bridge/msg-gen/src/parser/package.rs

Line 12 in 20afeb7

const ROSIDL_INTERFACES: &str = "share/ament_index/resource_index/rosidl_interfaces";

The parsing use this index to search for packages:

fn get_ros_msgs_each_package<P: AsRef<Path>>(root_dir: P) -> Result<Vec<Package>> {
    let dir = root_dir.as_ref().join(ROSIDL_INTERFACES);

[bobd988]

Ubuntu 22.04 OS switch to fix-ament-prefix-path branch and

cargo run --example cxx-ros2-dataflow --features ros2-examples

I got compile error

Compiling dora-node-api v0.3.3 (/home/demo/Public/github_dora/dora/apis/rust/node)
error: failed to run custom build command for dora-ros2-bridge v0.1.0 (/home/demo/Public/github_dora/dora/libraries/extensions/ros2-bridge)

Caused by:
process didn't exit successfully: /home/demo/Public/github_dora/dora/target/debug/build/dora-ros2-bridge-3496c43697944aee/build-script-build (exit status: 101)
--- stdout
cargo:rerun-if-env-changed=AMENT_PREFIX_PATH
cargo:rerun-if-changed=/opt/ros/humble
cargo:rerun-if-changed=
cargo:rerun-if-changed=/home/demo/msgs
cargo:rerun-if-changed=/home/demo/msgs/autoware_msgs/autoware_common_msgs/msg/

--- stderr
GlobError { path: "/boot/efi", error: Os { code: 13, kind: PermissionDenied, message: "Permission denied" } }
GlobError { path: "/etc/cups/ssl", error: Os { code: 13, kind: PermissionDenied, message: "Permission denied" } }
GlobError { path: "/etc/polkit-1/localauthority", error: Os { code: 13, kind: PermissionDenied, message: "Permission denied" } }
GlobError { path: "/etc/ssl/private", error: Os { code: 13, kind: PermissionDenied, message: "Permission denied" } }
thread 'main' panicked at /home/demo/Public/github_dora/dora/libraries/extensions/ros2-bridge/msg-gen/src/lib.rs:23:40:
called Result::unwrap() on an Err value: No such file or directory (os error 2)
note: run with RUST_BACKTRACE=1 environment variable to display a backtrace
warning: build failed, waiting for other jobs to finish...
Error: failed to compile dora-node-api-cxx

Location:
examples/c++-ros2-dataflow/run.rs:74:9

[haixuanTao]

Indeed! Thanks for trying. Just pushed a fix on the branch.