Building helloworld package fails

[SilvioMueller]

I am trying to build the basic package created with ros2 pkg create --build-type ament_python helloworld But if I try to build with colcon build I get the follwoing error:

--- stderr: helloworld
Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/colcon_core/executor/__init__.py", line 91, in __call__
    rc = await self.task(*args, **kwargs)
  File "/usr/lib/python3/dist-packages/colcon_core/task/__init__.py", line 93, in __call__
    return await task_method(*args, **kwargs)
  File "/usr/lib/python3/dist-packages/colcon_ros/task/ament_python/build.py", line 51, in build
    setup_py_data = get_setup_data(self.context.pkg, env)
  File "/usr/lib/python3/dist-packages/colcon_core/task/python/__init__.py", line 20, in get_setup_data
    return dict(pkg.metadata[key](env))
  File "/usr/lib/python3/dist-packages/colcon_ros/package_augmentation/ros_ament_python.py", line 57, in getter
    return get_setup_information(
  File "/usr/lib/python3/dist-packages/colcon_python_setup_py/package_identification/python_setup_py.py", line 241, in get_setup_information
    _setup_information_cache[hashable_env] = _get_setup_information(
  File "/usr/lib/python3/dist-packages/colcon_python_setup_py/package_identification/python_setup_py.py", line 293, in _get_setup_information
    return ast.literal_eval(output)
  File "/usr/lib/python3.10/ast.py", line 64, in literal_eval
    node_or_string = parse(node_or_string.lstrip(" \t"), mode='eval')
  File "/usr/lib/python3.10/ast.py", line 50, in parse
    return compile(source, filename, mode, flags,
  File "<unknown>", line 1
    {'package_data': {}, 'dist_files': [], 'src_root': None, 'dependency_links': [], 'setup_requires': [], 'eager_resources': None, 'entry_points': {'console_scripts': []}, 'exclude_package_data': None, 'extras_require': {}, 'include_package_data': None, 'install_requires': ['setuptools'], 'namespace_packages': None, 'packages': ['helloworld'], 'python_requires': None, 'test_loader': None, 'test_runner': None, 'test_suite': None, 'tests_require': ['pytest'], 'use_2to3': None, 'zip_safe': True, 'verbose': 1, 'dry_run': 0, 'help': 0, 'command_packages': None, 'script_name': 'setup.py', 'script_args': ['--dry-run'], 'command_options': {'develop': {'script_dir': ('setup.cfg', '$base/lib/helloworld')}, 'install': {'install_scripts': ('setup.cfg', '$base/lib/helloworld')}}, 'package_dir': {}, 'py_modules': None, 'libraries': None, 'headers': None, 'ext_package': None, 'include_dirs': None, 'extra_path': None, 'scripts': None, 'data_files': [('share/ament_index/resource_index/packages', ['resource/helloworld']), ('share/helloworld', ['package.xml'])], 'password': '', 'command_obj': {}, 'have_run': {}, 'want_user_cfg': True, 'metadata': {'name': 'helloworld', 'version': '0.0.0', 'author': None, 'author_email': None, 'maintainer': 'sml', 'maintainer_email': 'sml@todo.todo', 'url': None, 'license': 'TODO: License declaration', 'description': 'TODO: Package description', 'long_description': None, 'keywords': None, 'platforms': None, 'classifiers': None, 'download_url': None, 'provides': None, 'requires': None, 'obsoletes': None, 'long_description_content_type': None, 'project_urls': {}, 'license_file': None, '_normalized_install_requires': {'setuptools': <Requirement('setuptools')>}, '_normalized_extras_require': {}}}
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SyntaxError: invalid syntax

This error only happens for python packages. C++ Packages are beeing built.

My System is:

• Ubuntu 20.04.3
• ROS2 Humble
• Python 3.10.12

[asasine]

We've begun seeing this when building other packages too including ament_cpplint, ament_uncrustify, and ament_lint. The next best issue I could find for this is colcon/colcon-python-setup-py#56

[cottsay]

I'm pretty sure this is colcon/colcon-python-setup-py#56. Can you both confirm if pinning setuptools worked around the issue?

@pablogs9 FYI

[asasine]

I can confirm that upgrading setuptools>68.2.0 mitigates the issue.

[cottsay]

Thanks, closing this as a duplicate of colcon/colcon-python-setup-py#56.