Fix controller parameter loading issue in different cases

controller_manager/controller_manager/spawner.py

@@ -19,8 +19,6 @@
 import sys
 import time
 import warnings
-import io
-from contextlib import redirect_stdout, redirect_stderr
 
 from controller_manager import (
     configure_controller,
@@ -37,7 +35,6 @@
 from rclpy.parameter import get_parameter_value
 from rclpy.signals import SignalHandlerOptions
 from ros2param.api import call_set_parameters
-from ros2param.api import load_parameter_file
 
 # from https://stackoverflow.com/a/287944
 
@@ -266,6 +263,38 @@ def main(args=None):
                         )
                         return 1
 
+                if param_file:
+                    parameter = Parameter()
+                    parameter.name = prefixed_controller_name + ".params_file"
+                    parameter.value = get_parameter_value(string_value=param_file)
+
+                    response = call_set_parameters(
+                        node=node, node_name=controller_manager_name, parameters=[parameter]
+                    )
+                    assert len(response.results) == 1
+                    result = response.results[0]
+                    if result.successful:
+                        node.get_logger().info(
+                            bcolors.OKCYAN
+                            + 'Set controller params file to "'
+                            + param_file
+                            + '" for '
+                            + bcolors.BOLD
+                            + prefixed_controller_name
+                            + bcolors.ENDC
+                        )
+                    else:
+                        node.get_logger().fatal(
+                            bcolors.FAIL
+                            + 'Could not set controller params file to "'
+                            + param_file
+                            + '" for '
+                            + bcolors.BOLD
+                            + prefixed_controller_name
+                            + bcolors.ENDC
+                        )
+                        return 1
+
                 ret = load_controller(node, controller_manager_name, controller_name)
                 if not ret.ok:
                     node.get_logger().fatal(
@@ -284,39 +313,6 @@ def main(args=None):
                     + bcolors.ENDC
                 )
 
-            if param_file:
-                # load_parameter_file writes to stdout/stderr. Here we capture that and use node logging instead
-                with redirect_stdout(io.StringIO()) as f_stdout, redirect_stderr(
-                    io.StringIO()
-                ) as f_stderr:
-                    load_parameter_file(
-                        node=node,
-                        node_name=prefixed_controller_name,
-                        parameter_file=param_file,
-                        use_wildcard=True,
-                    )
-                if f_stdout.getvalue():
-                    node.get_logger().info(bcolors.OKCYAN + f_stdout.getvalue() + bcolors.ENDC)
-                if f_stderr.getvalue():
-                    node.get_logger().error(bcolors.FAIL + f_stderr.getvalue() + bcolors.ENDC)
-                node.get_logger().info(
-                    bcolors.OKCYAN
-                    + 'Loaded parameters file "'
-                    + param_file
-                    + '" for '
-                    + bcolors.BOLD
-                    + prefixed_controller_name
-                    + bcolors.ENDC
-                )
-                # TODO(destogl): use return value when upstream return value is merged
-                # ret =
-                # if ret.returncode != 0:
-                #     Error message printed by ros2 param
-                #     return ret.returncode
-                node.get_logger().info(
-                    "Loaded " + param_file + " into " + prefixed_controller_name
-                )
-
             if not args.load_only:
                 ret = configure_controller(node, controller_manager_name, controller_name)
                 if not ret.ok:

controller_manager/src/controller_manager.cpp

@@ -574,6 +574,23 @@ controller_interface::ControllerInterfaceBaseSharedPtr ControllerManager::load_c
   controller_spec.next_update_cycle_time = std::make_shared<rclcpp::Time>(
     0, 0, this->get_node_clock_interface()->get_clock()->get_clock_type());
 
+  // We have to fetch the params_file at the time of loading the controller, because this way we can
+  // load them at the creating of the LifeCycleNode and this helps in using the features such as
+  // read_only params, dynamic maps lists etc
+  // Now check if the params_file parameter exist
+  const std::string param_name = controller_name + ".params_file";
+  std::string params_file;
+
+  // Check if parameter has been declared
+  if (!has_parameter(param_name))
+  {
+    declare_parameter(param_name, rclcpp::ParameterType::PARAMETER_STRING);
+  }
+  if (get_parameter(param_name, params_file) && !params_file.empty())
+  {
+    controller_spec.info.params_file = params_file;
+  }
+
   return add_controller_impl(controller_spec);
 }
 
@@ -1300,10 +1317,16 @@ controller_interface::ControllerInterfaceBaseSharedPtr ControllerManager::add_co
     return nullptr;
   }
 
+  rclcpp::NodeOptions controller_node_options = rclcpp::NodeOptions().enable_logger_service(true);
+  if (controller.info.params_file.has_value())
+  {
+    controller_node_options = controller_node_options.arguments(
+      {"--ros-args", "--params-file", controller.info.params_file.value()});
+  }
   if (
     controller.c->init(
-      controller.info.name, robot_description_, get_update_rate(), get_namespace()) ==
-    controller_interface::return_type::ERROR)
+      controller.info.name, robot_description_, get_update_rate(), get_namespace(),
+      controller_node_options) == controller_interface::return_type::ERROR)
   {
     to.clear();
     RCLCPP_ERROR(

hardware_interface/include/hardware_interface/controller_info.hpp

@@ -15,6 +15,7 @@
 #ifndef HARDWARE_INTERFACE__CONTROLLER_INFO_HPP_
 #define HARDWARE_INTERFACE__CONTROLLER_INFO_HPP_
 
+#include <optional>
 #include <string>
 #include <vector>
 
@@ -32,6 +33,9 @@ struct ControllerInfo
   /// Controller type.
   std::string type;
 
+  /// Controller param file
+  std::optional<std::string> params_file;
+
   /// List of claimed interfaces by the controller.
   std::vector<std::string> claimed_interfaces;
 };