launch_pal

Utilities for simplifying some common ROS2 launch operations.

robot_config

Contains utilities to read launch argument settings directly from a YAML file, grouped per robot type. Used to to automate argument declaration for the robots by launch_arg_factory .

arg_utils

Contains utilities for declaring launch arguments and removing boiler plate.

launch_arg_factory: Combines an existing LaunchArgumentsBase dataclass with robot specific launch arguments. These robot specific arguments are directly loaded from a yaml file.

An example of the use can be found in the launch_tutorial package that compares the standard boilerplate with the an updated version of the launch file. This updated version also provides a structured architecture that seperates launch arguments from other launch actions.

LaunchArgumentsBase: A dataclass that contains only DeclareLaunchArgument objects. The class is used to ease the process of adding launch arguments to the launch description.

read_launch_argument: Used in Opaque functions to read the value of a launch argument and substitute it to text.

param_utils

Contains utilities for merging yaml parameter files or replace parametric variables in a param file.

parse_parametric_yaml: Checks yaml files for variables of layout ${VAR_NAME}and parses them. Parsing is done by giving a dictionary as input:

parse_dict = { VAR_NAME_1: value_1,
               VAR_NAME_2: value_2}

merge_param_files: Merges multiple yaml files into one single file to be loaded by a node.

include_utils

Contains utilities to reduce the boilerplate necessary for including files.

include_launch_py_description: Include a python launch file.

include_scoped_launch_py_description: Include a python launch file but avoid all launch arguments to be passed on by default. Any required launch arguments have to explicitly passed on to the launch file.

NOTE: This mimics the behavior of including launch files in ROS 1. Helpful in large launch files structures to avoid launch arguments to be overwritten by accident.

robot_utils (DEPRECATED)

Declare a single launch argument given by the robot name.

Example:

robot_name = 'tiago'
laser_model_arg = get_laser_model(robot_name)

Contributing Guidelines

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