Building Rust packages inside ROS workspaces

[montmejat]

Why do I need to have ros2/, ros2_rust/ and ros2-rust/ in my workspace/src/ to build my Rust ROS packages? Isn't rclrs being pulled as a dependency (from the Cargo.toml of my Rust package)?

common_interfaces, example_interfaces, etc. are also located in /opt/ros/jazzy/share/.

Just want to understand, new to this project :)

Would also be nice to be able to put .msg, .srv and .action files inside of packages containing code, and not have it as a separate thing only for that :) like the traditional C++ or Python packages, where you can have both code and interface files

[michalfita]

Would also be nice to be able to put .msg, .srv and .action files inside of packages containing code, and not have it as a separate thing only for that :) like the traditional C++ or Python packages, where you can have both code and interface files

This is deprecated approach and generation of messages for different programming language is possible only if the message package is language agnostic in the first place.