Failed <<< rosidl_generator_py [7.26s, exited with code 1]

[Smit-tay]

Bug report

Required Info:

• Operating System:
  Fedora 41 Linux
• Installation type:
  Source
• Version or commit hash:
  Jazzy
• DDS implementation:
  Default
• Client library (if applicable):
  Unknown

Steps to reproduce issue

Expected behavior

build without error

Actual behavior

starting >>> rosidl_generator_py
Starting >>> rosidl_typesupport_cpp                                                                                          
--- stderr: rosidl_generator_py                                                                                              
CMake Error at /home/me/ros2_jazzy/install/rosidl_adapter/share/rosidl_adapter/cmake/rosidl_adapt_interfaces.cmake:57 (message):
  execute_process(/usr/bin/python3 -m rosidl_adapter --package-name
  rosidl_generator_py --arguments-file
  /home/me/ros2_jazzy/build/rosidl_generator_py/rosidl_adapter__arguments__rosidl_generator_py_custom.json
  --output-dir
  /home/me/ros2_jazzy/build/rosidl_generator_py/rosidl_adapter/rosidl_generator_py
  --output-file
  /home/me/ros2_jazzy/build/rosidl_generator_py/rosidl_adapter/rosidl_generator_py_custom.idls)
  returned error code 1:

  AttributeError processing template 'msg.idl.em'

  Traceback (most recent call last):

    File "/home/me/ros2_jazzy/install/rosidl_adapter/lib/python3.13/site-packages/rosidl_adapter/resource/__init__.py", line 51, in evaluate_template
      em.BUFFERED_OPT: True,
      ^^^^^^^^^^^^^^^

  AttributeError: module 'em' has no attribute 'BUFFERED_OPT'



  During handling of the above exception, another exception occurred:



  Traceback (most recent call last):

    File "<frozen runpy>", line 198, in _run_module_as_main
    File "<frozen runpy>", line 88, in _run_code
    File "/home/me/ros2_jazzy/install/rosidl_adapter/lib/python3.13/site-packages/rosidl_adapter/__main__.py", line 19, in <module>
      sys.exit(main())
               ~~~~^^
    File "/home/me/ros2_jazzy/install/rosidl_adapter/lib/python3.13/site-packages/rosidl_adapter/main.py", line 53, in main
      abs_idl_file = convert_to_idl(
          pathlib.Path(basepath), args.package_name,
          pathlib.Path(relative_path), output_dir)
    File "/home/me/ros2_jazzy/install/rosidl_adapter/lib/python3.13/site-packages/rosidl_adapter/__init__.py", line 19, in convert_to_idl
      return convert_msg_to_idl(
          package_dir, package_name, interface_file, output_dir / 'msg')
    File "/home/me/ros2_jazzy/install/rosidl_adapter/lib/python3.13/site-packages/rosidl_adapter/msg/__init__.py", line 39, in convert_msg_to_idl
      expand_template('msg.idl.em', data, output_file, encoding='iso-8859-1')
      ~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    File "/home/me/ros2_jazzy/install/rosidl_adapter/lib/python3.13/site-packages/rosidl_adapter/resource/__init__.py", line 23, in expand_template
      content = evaluate_template(template_name, data)
    File "/home/me/ros2_jazzy/install/rosidl_adapter/lib/python3.13/site-packages/rosidl_adapter/resource/__init__.py", line 69, in evaluate_template
      _interpreter.shutdown()
      ^^^^^^^^^^^^^^^^^^^^^

  AttributeError: 'NoneType' object has no attribute 'shutdown'

Call Stack (most recent call first):
  /home/me/ros2_jazzy/install/rosidl_cmake/share/rosidl_cmake/cmake/rosidl_generate_interfaces.cmake:132 (rosidl_adapt_interfaces)
  CMakeLists.txt:50 (rosidl_generate_interfaces)


---
Failed   <<< rosidl_generator_py [7.26s, exited with code 1]

[clalancette]

This is almost certainly because you have empy 4 installed. If you switch to the packaged version in Ubuntu (empy 3), this should work.

That said, we have some compatibility patches in Rolling that make it work for both. I'll look into backporting those into Jazzy.

[Smit-tay]

I'm starting to worry about having to use containers for everything I want to do