Re-Export Generated Messages in rclrs

.github/workflows/rust-minimal.yml

@@ -69,11 +69,12 @@ jobs:
 
     # Colcon can not be run in a venv which is required in Ubuntu Noble
     # Removing the externally managed file
-    - name: Install colcon-cargo and colcon-ros-cargo
+    - name: Install colcon-cargo, colcon-ros-cargo, and cargo-ament-build
       run: |
         sudo rm -f /usr/lib/python3.12/EXTERNALLY-MANAGED
         sudo pip3 install git+https://github.com/colcon/colcon-cargo.git
         sudo pip3 install git+https://github.com/colcon/colcon-ros-cargo.git
+        cargo install --git https://git@github.com/maspe36/cargo-ament-build.git --branch feature/skip_reexport_marker_file
 
     - name: Check formatting of Rust packages
       run: |

.github/workflows/rust-stable.yml

@@ -69,11 +69,12 @@ jobs:
 
     # Colcon can not be run in a venv which is required in Ubuntu Noble
     # Removing the externally managed file
-    - name: Install colcon-cargo and colcon-ros-cargo
+    - name: Install colcon-cargo, colcon-ros-cargo, and cargo-ament-build
       run: |
         sudo rm -f /usr/lib/python3.12/EXTERNALLY-MANAGED
         sudo pip3 install git+https://github.com/colcon/colcon-cargo.git
         sudo pip3 install git+https://github.com/colcon/colcon-ros-cargo.git
+        cargo install --git https://git@github.com/maspe36/cargo-ament-build.git --branch feature/skip_reexport_marker_file
 
     - name: Check formatting of Rust packages
       run: |

.github/workflows/rust-win.yml

@@ -40,6 +40,8 @@ jobs:
         # prerequisites and fixes for windows build ros2_rust:
         #     * Libclang has to be added (from the ros2_rust instructions) and the dll has to be renamed
         #     * colcon-ros-cargo and colcon-cargo have to be added as PyPI packages
+        #     * cargo-ament-build is manually installed from github for now to include the change to skip
+        #         installing the marker file if the package should be reexported
         run: |
           pixi add libclang --manifest-path C:\pixi_ws\pixi.toml
           $src = "C:\pixi_ws\.pixi\envs\default\Library\bin\libclang-13.dll"
@@ -48,6 +50,7 @@ jobs:
           pixi add --pypi "colcon-ros-cargo@git+https://github.com/colcon/colcon-ros-cargo.git" --manifest-path C:\pixi_ws\pixi.toml
           pixi add --pypi "colcon-cargo@git+https://github.com/colcon/colcon-cargo.git" --manifest-path C:\pixi_ws\pixi.toml
           pixi upgrade colcon-core --manifest-path C:\pixi_ws\pixi.toml
+          cargo install --git https://git@github.com/maspe36/cargo-ament-build.git --branch feature/skip_reexport_marker_file
 
       - name: Get prebuilt ROS files and unzip
         run: |

docs/writing-your-first-rclrs-node.md

@@ -44,7 +44,7 @@ Instead, you can store the node as a regular member. Let's add a struct that con
 
 ```rust
 use std::sync::Arc;
-use std_msgs::msg::String as StringMsg;
+use rclrs::std_msgs::msg::String as StringMsg;
 
 struct RepublisherNode {
     node: Arc<rclrs::Node>,
@@ -111,7 +111,7 @@ So, to store the received data in the struct, the following things have to chang
 
 ```rust
 use std::sync::{Arc, Mutex};  // (1)
-use std_msgs::msg::String as StringMsg;
+use rclrs::std_msgs::msg::String as StringMsg;
 
 struct RepublisherNode {
     node: Arc<rclrs::Node>,

docs/writing_a_simple_publisher_and_subscriber.md

@@ -94,7 +94,7 @@ To construct a node, replace the code in your `main.rs` file with the following:
 /// methods to publish a simple "Hello World" message on a loop in separate threads.
 use rclrs::{create_node, Context, Node, Publisher, RclrsError, QOS_PROFILE_DEFAULT};
 use std::{env, sync::Arc, thread, time::Duration};
-use std_msgs::msg::String as StringMsg;
+use rclrs::std_msgs::msg::String as StringMsg;
 /// SimplePublisherNode struct contains node and publisher members.
 /// Used to initialize a ROS 2 node and publisher, and publish messages.
 struct SimplePublisherNode {
@@ -138,7 +138,7 @@ handling, iteration, threading, ROS 2 communication, and string message publishi
 ```rust
 use rclrs::{create_node, Context, Node, Publisher, RclrsError, QOS_PROFILE_DEFAULT};
 use std::{env, sync::Arc, thread, time::Duration};
-use std_msgs::msg::String as StringMsg;
+use rclrs::std_msgs::msg::String as StringMsg;
 ```
 * `use std::{sync::Arc, time::Duration, iter, thread};`: Imports specific features from the standard library: 
     - `Arc` is for thread-safe shared ownership of data. 
@@ -149,7 +149,7 @@ use std_msgs::msg::String as StringMsg;
         - `RclrsError` for handling errors. 
         - `QOS_PROFILE_DEFAULT` for default Quality of Service settings. 
 - `Context, create_node, Node, Publisher` are for ROS 2 node creation and publishing.
-* `use std_msgs::msg::String as StringMsg;`: Imports the `StringMsg` type for publishing string messages.  
+* `use rclrs::std_msgs::msg::String as StringMsg;`: Imports the `StringMsg` type for publishing string messages.  
 
 #### `SimplePublisherNode`
 Next, this structure defines a `SimplePublisherNode` which holds references to a ROS 2 node and a publisher for string messages.
@@ -291,7 +291,7 @@ use std::{
     thread,
     time::Duration,
 };
-use std_msgs::msg::String as StringMsg;
+use rclrs::std_msgs::msg::String as StringMsg;
 pub struct SimpleSubscriptionNode {
     node: Arc<Node>,
     _subscriber: Arc<Subscription<StringMsg>>,

rclrs/Cargo.toml

@@ -35,6 +35,8 @@ async-std = "1.13"
 # Needed for dynamic messages
 libloading = "0.8"
 
+ros-env = "0.1"
+
 # Needed for the Message trait, among others
 rosidl_runtime_rs = "0.6"
 
@@ -54,6 +56,8 @@ tokio-stream = "0.1"
 # Needed by action clients to generate UUID values for their goals
 uuid = { version = "1", features = ["v4"] }
 
+paste = { version = "1", optional = true}
+
 [dev-dependencies]
 # Needed for e.g. writing yaml files in tests
 tempfile = "3.3.0"
@@ -65,12 +69,15 @@ tokio = { version = "1", features = ["rt", "time", "macros"] }
 cfg-if = "1.0.0"
 rustflags = "0.1"
 
+# Helper crate for working with AMENT_PREFIX_PATH
+ament_rs = "0.3"
+
 [features]
 default = []
-serde = ["dep:serde", "dep:serde-big-array", "rosidl_runtime_rs/serde"]
+serde = ["dep:serde", "dep:serde-big-array", "rosidl_runtime_rs/serde", "ros-env/serde"]
 # This feature is solely for the purpose of being able to generate documetation without a ROS installation
 # The only intended usage of this feature is for docs.rs builders to work, and is not intended to be used by end users
-use_ros_shim = ["rosidl_runtime_rs/use_ros_shim"]
+use_ros_shim = ["paste", "rosidl_runtime_rs/use_ros_shim"]
 
 [package.metadata.docs.rs]
 features = ["use_ros_shim"]

rclrs/build.rs

@@ -1,63 +1,52 @@
-use std::{env, path::Path};
-const AMENT_PREFIX_PATH: &str = "AMENT_PREFIX_PATH";
+use ament_rs::search_paths::get_search_paths;
+use std::{env, path::PathBuf};
+
 const ROS_DISTRO: &str = "ROS_DISTRO";
+const KNOWN_DISTROS: &[&str] = &["humble", "jazzy", "kilted", "rolling"];
 
-fn get_env_var_or_abort(env_var: &'static str) -> String {
-    if let Ok(value) = env::var(env_var) {
-        value
-    } else {
-        panic!(
-            "{} environment variable not set - please source ROS 2 installation first.",
-            env_var
-        );
-    }
+fn get_ros_distro() -> String {
+    env::var(ROS_DISTRO)
+        .or_else(|_| {
+            if env::var("CARGO_FEATURE_USE_ROS_SHIM").is_ok() {
+                rustflags::from_env()
+                    .find_map(|f| match f {
+                        rustflags::Flag::Cfg { name, value } if name.as_str() == "ros_distro" => {
+                            value
+                        }
+                        _ => None,
+                    })
+                    .ok_or_else(|| "Missing --cfg ros_distro in RUSTFLAGS".to_string())
+            } else {
+                Err(format!("Set {ROS_DISTRO} or use ROS shim"))
+            }
+        })
+        .expect("Failed to determine ROS distro")
 }
 
 fn main() {
     println!(
         "cargo:rustc-check-cfg=cfg(ros_distro, values(\"{}\"))",
-        ["humble", "jazzy", "kilted", "rolling"].join("\", \"")
+        KNOWN_DISTROS.join("\", \"")
     );
-    let ros_distro = if let Ok(value) = env::var(ROS_DISTRO) {
-        value
-    } else {
-        cfg_if::cfg_if! {
-            if #[cfg(feature="use_ros_shim")] {
-                use rustflags;
-                // // Look for --cfg ros_distro=<ros_distro>
-                for flag in rustflags::from_env() {
-                    if matches!(flag, rustflags::Flag::Cfg { ref name, value : _ } if name == "ros_distro") {
-                        if let rustflags::Flag::Cfg {name:_, value: flag_value} = flag {
-                            println!("cargo:rustc-cfg=ros_distro=\"{}\"", flag_value.unwrap());
-                            return;
-                        } else {
-                            continue;
-                        }
-                    }
-                }
-                let error_msg =
-                    "When using the use_ros_shim feature, you must pass the ROS distribution you are targeting as a compiler flag with --cfg ros_distro=\"<ros_distro>\"";
-                panic!("{}", error_msg);
-            } else {
-                let error_msg =
-                    "ROS_DISTRO environment variable not set - please source ROS 2 installation first.";
-                panic!("{}", error_msg);
-            }
-        }
-    };
-    println!("cargo:rustc-cfg=ros_distro=\"{ros_distro}\"");
+    println!("cargo:rustc-cfg=ros_distro=\"{}\"", get_ros_distro());
+    println!("cargo:rerun-if-env-changed={ROS_DISTRO}");
+
+    let ament_prefix_paths = get_search_paths().unwrap_or_default();
 
-    let ament_prefix_paths = get_env_var_or_abort(AMENT_PREFIX_PATH);
-    for ament_prefix_path in ament_prefix_paths.split(':').map(Path::new) {
+    for ament_prefix_path in &ament_prefix_paths {
         // Link the native libraries
-        let library_path = ament_prefix_path.join("lib");
+        let library_path = PathBuf::from(ament_prefix_path).join("lib");
         println!("cargo:rustc-link-search=native={}", library_path.display());
     }
 
-    println!("cargo:rustc-link-lib=dylib=rcl");
-    println!("cargo:rustc-link-lib=dylib=rcl_action");
-    println!("cargo:rustc-link-lib=dylib=rcl_yaml_param_parser");
-    println!("cargo:rustc-link-lib=dylib=rcutils");
-    println!("cargo:rustc-link-lib=dylib=rmw");
-    println!("cargo:rustc-link-lib=dylib=rmw_implementation");
+    [
+        "rcl",
+        "rcl_action",
+        "rcl_yaml_param_parser",
+        "rcutils",
+        "rmw",
+        "rmw_implementation",
+    ]
+    .iter()
+    .for_each(|lib| println!("cargo:rustc-link-lib=dylib={lib}"));
 }

rclrs/src/action.rs

@@ -9,7 +9,8 @@ pub use action_goal_receiver::*;
 pub(crate) mod action_server;
 pub use action_server::*;
 
-use crate::{log_error, rcl_bindings::*, vendor::builtin_interfaces::msg::Time, DropGuard};
+use crate::{log_error, rcl_bindings::*, DropGuard};
+use ros_env::builtin_interfaces::msg::Time;
 use std::fmt;
 
 #[cfg(feature = "serde")]
@@ -255,13 +256,11 @@ fn empty_goal_status_array() -> DropGuard<rcl_action_goal_status_array_t> {
 
 #[cfg(test)]
 mod tests {
-    use crate::{
-        vendor::example_interfaces::action::{
-            Fibonacci, Fibonacci_Feedback, Fibonacci_Goal, Fibonacci_Result,
-        },
-        *,
-    };
+    use crate::*;
     use futures::StreamExt;
+    use ros_env::example_interfaces::action::{
+        Fibonacci, Fibonacci_Feedback, Fibonacci_Goal, Fibonacci_Result,
+    };
     use std::time::Duration;
     use tokio::sync::mpsc::unbounded_channel;
 

rclrs/src/action/action_client.rs

@@ -1,13 +1,11 @@
 use super::empty_goal_status_array;
 use crate::{
-    log_warn,
-    rcl_bindings::*,
-    vendor::{action_msgs::srv::CancelGoal_Response, builtin_interfaces::msg::Time},
-    CancelResponse, CancelResponseCode, DropGuard, GoalStatus, GoalStatusCode, GoalUuid,
-    MultiCancelResponse, Node, NodeHandle, QoSProfile, RclPrimitive, RclPrimitiveHandle,
-    RclPrimitiveKind, RclrsError, ReadyKind, TakeFailedAsNone, ToResult, Waitable,
-    WaitableLifecycle, ENTITY_LIFECYCLE_MUTEX,
+    log_warn, rcl_bindings::*, CancelResponse, CancelResponseCode, DropGuard, GoalStatus,
+    GoalStatusCode, GoalUuid, MultiCancelResponse, Node, NodeHandle, QoSProfile, RclPrimitive,
+    RclPrimitiveHandle, RclPrimitiveKind, RclrsError, ReadyKind, TakeFailedAsNone, ToResult,
+    Waitable, WaitableLifecycle, ENTITY_LIFECYCLE_MUTEX,
 };
+use ros_env::{action_msgs::srv::CancelGoal_Response, builtin_interfaces::msg::Time};
 use rosidl_runtime_rs::{Action, Message, RmwFeedbackMessage, RmwGoalResponse, RmwResultResponse};
 use std::{
     any::Any,

rclrs/src/action/action_client/goal_client.rs

@@ -1,7 +1,7 @@
 use crate::{
-    vendor::builtin_interfaces::msg::Time, CancellationClient, FeedbackClient, GoalStatus,
-    GoalStatusCode, ResultClient, StatusWatcher,
+    CancellationClient, FeedbackClient, GoalStatus, GoalStatusCode, ResultClient, StatusWatcher,
 };
+use ros_env::builtin_interfaces::msg::Time;
 use rosidl_runtime_rs::Action;
 use std::{
     pin::Pin,
@@ -96,7 +96,7 @@ impl<A: Action> GoalClient<A> {
 ///
 /// ```
 /// use rclrs::*;
-/// use crate::rclrs::vendor::example_interfaces::action::Fibonacci;
+/// use ros_env::example_interfaces::action::Fibonacci;
 /// use futures::StreamExt;
 ///
 /// async fn process_goal_client_stream(

rclrs/src/action/action_server.rs

@@ -1,12 +1,12 @@
 use super::empty_goal_status_array;
 use crate::{
-    action::GoalUuid, error::ToResult, rcl_bindings::*,
-    vendor::action_msgs::srv::CancelGoal_Response, ActionGoalReceiver, CancelResponseCode,
+    action::GoalUuid, error::ToResult, rcl_bindings::*, ActionGoalReceiver, CancelResponseCode,
     DropGuard, GoalStatusCode, Node, NodeHandle, QoSProfile, RclPrimitive, RclPrimitiveHandle,
     RclPrimitiveKind, RclrsError, ReadyKind, TakeFailedAsNone, Waitable, WaitableLifecycle,
     ENTITY_LIFECYCLE_MUTEX,
 };
 use futures::future::BoxFuture;
+use ros_env::action_msgs::srv::CancelGoal_Response;
 use rosidl_runtime_rs::{Action, Message, RmwGoalRequest, RmwResultRequest};
 use std::{
     any::Any,

rclrs/src/action/action_server/cancellation_state.rs

@@ -1,18 +1,16 @@
 use super::ActionServerHandle;
 use crate::{
-    log_error,
-    rcl_bindings::*,
-    vendor::{
-        action_msgs::{msg::GoalInfo, srv::CancelGoal_Response},
-        unique_identifier_msgs::msg::UUID,
-    },
-    CancelResponseCode, GoalUuid, Node, RclrsErrorFilter, ToResult,
+    log_error, rcl_bindings::*, CancelResponseCode, GoalUuid, Node, RclrsErrorFilter, ToResult,
 };
 use futures::{
     future::{select, Either},
     pin_mut,
 };
 use futures_lite::future::race;
+use ros_env::{
+    action_msgs::{msg::GoalInfo, srv::CancelGoal_Response},
+    unique_identifier_msgs::msg::UUID,
+};
 use rosidl_runtime_rs::{Action, Message};
 use std::{
     borrow::Cow,

rclrs/src/client.rs

@@ -159,7 +159,7 @@ where
     /// signatures and which returns a `()` (a.k.a. nothing).
     /// ```
     /// # use rclrs::*;
-    /// # use crate::rclrs::vendor::test_msgs;
+    /// # use ros_env::test_msgs;
     /// # let node = Context::default()
     /// #   .create_basic_executor()
     /// #   .create_node("test_node")?;
@@ -187,7 +187,7 @@ where
     ///
     /// ```
     /// # use rclrs::*;
-    /// # use crate::rclrs::vendor::test_msgs;
+    /// # use ros_env::test_msgs;
     /// # use std::future::Future;
     /// # let node = Context::default()
     /// #   .create_basic_executor()
@@ -216,7 +216,7 @@ where
     ///
     /// ```
     /// # use rclrs::*;
-    /// # use crate::rclrs::vendor::test_msgs;
+    /// # use ros_env::test_msgs;
     /// # let node = Context::default()
     /// #   .create_basic_executor()
     /// #   .create_node("test_node")?;
@@ -568,7 +568,8 @@ unsafe impl Send for rcl_client_t {}
 #[cfg(test)]
 mod tests {
     use super::*;
-    use crate::{test_helpers::*, vendor::test_msgs};
+    use crate::test_helpers::*;
+    use ros_env::test_msgs;
 
     #[test]
     fn traits() {