ros2interface can't show IDL messages

Bug report

Required Info:

• Operating System:

  • Ubuntu 22.041 LTS

• Installation type:

  • Source for ros2cli, but binaries for the rest of ROS,

• Version or commit hash:

  • f6fc61accff8b9648408053fb66b936839fe449d

• DDS implementation:

  • FastDDS

• Client library (if applicable):

  • N/A

Steps to reproduce issue

• Have a package that contains messages in .IDL format in a workspace (e.g. https://gitlab.com/autowarefoundation/autoware.auto/autoware_auto_msgs/-/tree/master/)
• Source the workspace
• The messages show in ros2 interface list

$ ros2 interface list -m
Messages:
    action_msgs/msg/GoalInfo
    action_msgs/msg/GoalStatus
    action_msgs/msg/GoalStatusArray
    actionlib_msgs/msg/GoalID
    actionlib_msgs/msg/GoalStatus
    actionlib_msgs/msg/GoalStatusArray
    autoware_auto_control_msgs/msg/AckermannControlCommand
    autoware_auto_control_msgs/msg/AckermannLateralCommand
    autoware_auto_control_msgs/msg/HighLevelControlCommand
    autoware_auto_control_msgs/msg/LongitudinalCommand
    autoware_auto_debug_msgs/msg/BoolStamped
    autoware_auto_debug_msgs/msg/Float32MultiArrayStamped
    autoware_auto_debug_msgs/msg/Float32Stamped
    autoware_auto_debug_msgs/msg/Float64MultiArrayStamped
    autoware_auto_debug_msgs/msg/Float64Stamped
    autoware_auto_debug_msgs/msg/Int32MultiArrayStamped
    autoware_auto_debug_msgs/msg/Int32Stamped
    autoware_auto_debug_msgs/msg/Int64MultiArrayStamped
    autoware_auto_debug_msgs/msg/Int64Stamped
    autoware_auto_debug_msgs/msg/MultiArrayDimension
    autoware_auto_debug_msgs/msg/MultiArrayLayout
    autoware_auto_debug_msgs/msg/StringStamped
...

• Show one of the IDL messages

$ ros2 interface show autoware_auto_control_msgs/msg/AckermannControlCommand

Expected behavior

ros2 interface show will show the message

Actual behavior

ros2 interface show throws an exception because it can't parse IDL messages:

$ ros2 interface show autoware_auto_control_msgs/msg/AckermannControlCommand
#include "autoware_auto_control_msgs/msg/AckermannLateralCommand.idl"
#include "autoware_auto_control_msgs/msg/LongitudinalCommand.idl"
#include "builtin_interfaces/msg/Time.idl"

Error processing 'module autoware_auto_control_msgs {' of 'autoware_auto_control_msgs/AckermannControlCommand': ''module' is an invalid message name. It should have the pattern '^[A-Z][A-Za-z0-9]*$''
Traceback (most recent call last):
  File "/home/esteve/Projects/tier4/ros2cli_ws/install/ros2cli/bin/ros2", line 33, in <module>
    sys.exit(load_entry_point('ros2cli==0.21.0', 'console_scripts', 'ros2')())
  File "/home/esteve/Projects/tier4/ros2cli_ws/install/ros2cli/lib/python3.10/site-packages/ros2cli/cli.py", line 89, in main
    rc = extension.main(parser=parser, args=args)
  File "/home/esteve/Projects/tier4/ros2cli_ws/install/ros2interface/lib/python3.10/site-packages/ros2interface/command/interface.py", line 35, in main
    return extension.main(args=args)
  File "/home/esteve/Projects/tier4/ros2cli_ws/install/ros2interface/lib/python3.10/site-packages/ros2interface/verb/show.py", line 201, in main
    _show_interface(
  File "/home/esteve/Projects/tier4/ros2cli_ws/install/ros2interface/lib/python3.10/site-packages/ros2interface/verb/show.py", line 148, in _show_interface
    for line in _get_interface_lines(interface_identifier):
  File "/home/esteve/Projects/tier4/ros2cli_ws/install/ros2interface/lib/python3.10/site-packages/ros2interface/verb/show.py", line 116, in _get_interface_lines
    yield InterfaceTextLine(
  File "/home/esteve/Projects/tier4/ros2cli_ws/install/ros2interface/lib/python3.10/site-packages/ros2interface/verb/show.py", line 43, in __init__
    msg_spec = parse_message_string(
  File "/home/esteve/Projects/tier4/ros2cli_ws/install/rosidl_adapter/local/lib/python3.10/dist-packages/rosidl_adapter/parser.py", line 520, in parse_message_string
    Type(type_string, context_package_name=pkg_name),
  File "/home/esteve/Projects/tier4/ros2cli_ws/install/rosidl_adapter/local/lib/python3.10/dist-packages/rosidl_adapter/parser.py", line 277, in __init__
    super(Type, self).__init__(
  File "/home/esteve/Projects/tier4/ros2cli_ws/install/rosidl_adapter/local/lib/python3.10/dist-packages/rosidl_adapter/parser.py", line 205, in __init__
    raise InvalidResourceName(
rosidl_adapter.parser.InvalidResourceName: 'module' is an invalid message name. It should have the pattern '^[A-Z][A-Za-z0-9]*$'

Additional information

Start with ros2interface/verb/show.py, especially _get_interface_lines and _show_interface, then inspect the rosidl_adapter/parser.py traceback path for IDL handling. Reproduce with ros2 interface show autoware_auto_control_msgs/msg/AckermannControlCommand in a workspace containing the referenced IDL messages. Done means the command displays the IDL message without the parsing exception.