Create space_nav2_bringup package with example launch files (space-ro…

…s#142).

This package will be used instead of nav2_bringup for launching to remove heavy dependency on packages like rviz2.

navigation2/src/space_nav2_bringup/CMakeLists.txt

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+cmake_minimum_required(VERSION 3.8)
+project(space_nav2_bringup)
+
+if(CMAKE_COMPILER_IS_GNUCXX OR CMAKE_CXX_COMPILER_ID MATCHES "Clang")
+  add_compile_options(-Wall -Wextra -Wpedantic)
+endif()
+
+# find dependencies
+find_package(ament_cmake REQUIRED)
+
+install(DIRECTORY launch DESTINATION share/${PROJECT_NAME}/)
+
+if(BUILD_TESTING)
+  find_package(ament_lint_auto REQUIRED)
+  set(ament_cmake_copyright_FOUND TRUE)
+  set(ament_cmake_cpplint_FOUND TRUE)
+  ament_lint_auto_find_test_dependencies()
+endif()
+
+ament_package()

navigation2/src/space_nav2_bringup/launch/localization_launch.py

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+# Copyright (c) 2018 Intel Corporation
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import os
+
+from ament_index_python.packages import get_package_share_directory
+
+from launch import LaunchDescription
+from launch.actions import DeclareLaunchArgument, GroupAction, SetEnvironmentVariable
+from launch.conditions import IfCondition
+from launch.substitutions import LaunchConfiguration, PythonExpression
+from launch_ros.actions import LoadComposableNodes
+from launch_ros.actions import Node
+from launch_ros.descriptions import ComposableNode, ParameterFile
+from nav2_common.launch import RewrittenYaml
+
+
+def generate_launch_description():
+    # Get the launch directory
+    bringup_dir = get_package_share_directory('space_nav2_bringup')
+
+    namespace = LaunchConfiguration('namespace')
+    map_yaml_file = LaunchConfiguration('map')
+    use_sim_time = LaunchConfiguration('use_sim_time')
+    autostart = LaunchConfiguration('autostart')
+    params_file = LaunchConfiguration('params_file')
+    use_composition = LaunchConfiguration('use_composition')
+    container_name = LaunchConfiguration('container_name')
+    container_name_full = (namespace, '/', container_name)
+    use_respawn = LaunchConfiguration('use_respawn')
+    log_level = LaunchConfiguration('log_level')
+
+    lifecycle_nodes = ['map_server', 'amcl']
+
+    # Map fully qualified names to relative ones so the node's namespace can be prepended.
+    # In case of the transforms (tf), currently, there doesn't seem to be a better alternative
+    # https://github.com/ros/geometry2/issues/32
+    # https://github.com/ros/robot_state_publisher/pull/30
+    # TODO(orduno) Substitute with `PushNodeRemapping`
+    #              https://github.com/ros2/launch_ros/issues/56
+    remappings = [('/tf', 'tf'),
+                  ('/tf_static', 'tf_static')]
+
+    # Create our own temporary YAML files that include substitutions
+    param_substitutions = {
+        'use_sim_time': use_sim_time,
+        'yaml_filename': map_yaml_file}
+
+    configured_params = ParameterFile(
+        RewrittenYaml(
+            source_file=params_file,
+            root_key=namespace,
+            param_rewrites=param_substitutions,
+            convert_types=True),
+        allow_substs=True)
+
+    stdout_linebuf_envvar = SetEnvironmentVariable(
+        'RCUTILS_LOGGING_BUFFERED_STREAM', '1')
+
+    declare_namespace_cmd = DeclareLaunchArgument(
+        'namespace',
+        default_value='',
+        description='Top-level namespace')
+
+    declare_map_yaml_cmd = DeclareLaunchArgument(
+        'map',
+        description='Full path to map yaml file to load')
+
+    declare_use_sim_time_cmd = DeclareLaunchArgument(
+        'use_sim_time',
+        default_value='false',
+        description='Use simulation (Gazebo) clock if true')
+
+    declare_params_file_cmd = DeclareLaunchArgument(
+        'params_file',
+        default_value=os.path.join(bringup_dir, 'params', 'nav2_params.yaml'),
+        description='Full path to the ROS2 parameters file to use for all launched nodes')
+
+    declare_autostart_cmd = DeclareLaunchArgument(
+        'autostart', default_value='true',
+        description='Automatically startup the nav2 stack')
+
+    declare_use_composition_cmd = DeclareLaunchArgument(
+        'use_composition', default_value='False',
+        description='Use composed bringup if True')
+
+    declare_container_name_cmd = DeclareLaunchArgument(
+        'container_name', default_value='nav2_container',
+        description='the name of conatiner that nodes will load in if use composition')
+
+    declare_use_respawn_cmd = DeclareLaunchArgument(
+        'use_respawn', default_value='False',
+        description='Whether to respawn if a node crashes. Applied when composition is disabled.')
+
+    declare_log_level_cmd = DeclareLaunchArgument(
+        'log_level', default_value='info',
+        description='log level')
+
+    load_nodes = GroupAction(
+        condition=IfCondition(PythonExpression(['not ', use_composition])),
+        actions=[
+            Node(
+                package='nav2_map_server',
+                executable='map_server',
+                name='map_server',
+                output='screen',
+                respawn=use_respawn,
+                respawn_delay=2.0,
+                parameters=[configured_params],
+                arguments=['--ros-args', '--log-level', log_level],
+                remappings=remappings),
+            Node(
+                package='nav2_amcl',
+                executable='amcl',
+                name='amcl',
+                output='screen',
+                respawn=use_respawn,
+                respawn_delay=2.0,
+                parameters=[configured_params],
+                arguments=['--ros-args', '--log-level', log_level],
+                remappings=remappings),
+            Node(
+                package='nav2_lifecycle_manager',
+                executable='lifecycle_manager',
+                name='lifecycle_manager_localization',
+                output='screen',
+                arguments=['--ros-args', '--log-level', log_level],
+                parameters=[{'use_sim_time': use_sim_time},
+                            {'autostart': autostart},
+                            {'node_names': lifecycle_nodes}])
+        ]
+    )
+
+    load_composable_nodes = LoadComposableNodes(
+        condition=IfCondition(use_composition),
+        target_container=container_name_full,
+        composable_node_descriptions=[
+            ComposableNode(
+                package='nav2_map_server',
+                plugin='nav2_map_server::MapServer',
+                name='map_server',
+                parameters=[configured_params],
+                remappings=remappings),
+            ComposableNode(
+                package='nav2_amcl',
+                plugin='nav2_amcl::AmclNode',
+                name='amcl',
+                parameters=[configured_params],
+                remappings=remappings),
+            ComposableNode(
+                package='nav2_lifecycle_manager',
+                plugin='nav2_lifecycle_manager::LifecycleManager',
+                name='lifecycle_manager_localization',
+                parameters=[{'use_sim_time': use_sim_time,
+                             'autostart': autostart,
+                             'node_names': lifecycle_nodes}]),
+        ],
+    )
+
+    # Create the launch description and populate
+    ld = LaunchDescription()
+
+    # Set environment variables
+    ld.add_action(stdout_linebuf_envvar)
+
+    # Declare the launch options
+    ld.add_action(declare_namespace_cmd)
+    ld.add_action(declare_map_yaml_cmd)
+    ld.add_action(declare_use_sim_time_cmd)
+    ld.add_action(declare_params_file_cmd)
+    ld.add_action(declare_autostart_cmd)
+    ld.add_action(declare_use_composition_cmd)
+    ld.add_action(declare_container_name_cmd)
+    ld.add_action(declare_use_respawn_cmd)
+    ld.add_action(declare_log_level_cmd)
+
+    # Add the actions to launch all of the localiztion nodes
+    ld.add_action(load_nodes)
+    ld.add_action(load_composable_nodes)
+
+    return ld