Remove newlines in package description for compatibility with new setuptools

[Tobias-Fischer]

…uptools

Currently many builds are broken with the newest setuptools
This is because of pypa/setuptools#2870
See e.g. pypa/setuptools#1390 pypa/setuptools#2895 pypa/setuptools#2893

[cottsay]

Currently many builds are broken with the newest setuptools

Could you share an example?

[Tobias-Fischer]

Sure. Here is one for image-geometry (https:/ros-perception/vision_opencv/blob/noetic/image_geometry/package.xml - mind the newlines in the description), same for e.g. cv-bridge.

Traceback (most recent call last):
6665
  File "/usr/share/miniconda/conda-bld/ros-noetic-image-geometry_1637272499147/work/ros-noetic-image-geometry/src/work/setup.py", line 10, in <module>
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    setup(**d)
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  File "/usr/share/miniconda/conda-bld/ros-noetic-image-geometry_1637272499147/_h_env_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placeho/lib/python3.8/site-packages/setuptools/__init__.py", line 153, in setup
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    return distutils.core.setup(**attrs)
6669
  File "/usr/share/miniconda/conda-bld/ros-noetic-image-geometry_1637272499147/_h_env_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placeho/lib/python3.8/distutils/core.py", line 148, in setup
6670
    dist.run_commands()
6671
  File "/usr/share/miniconda/conda-bld/ros-noetic-image-geometry_1637272499147/_h_env_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placeho/lib/python3.8/distutils/dist.py", line 966, in run_commands
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    self.run_command(cmd)
6673
  File "/usr/share/miniconda/conda-bld/ros-noetic-image-geometry_1637272499147/_h_env_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placeho/lib/python3.8/distutils/dist.py", line 985, in run_command
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    cmd_obj.run()
6675
  File "/usr/share/miniconda/conda-bld/ros-noetic-image-geometry_1637272499147/_h_env_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placeho/lib/python3.8/site-packages/setuptools/command/egg_info.py", line 292, in run
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    writer(self, ep.name, os.path.join(self.egg_info, ep.name))
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  File "/usr/share/miniconda/conda-bld/ros-noetic-image-geometry_1637272499147/_h_env_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placeho/lib/python3.8/site-packages/setuptools/command/egg_info.py", line 656, in write_pkg_info
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    metadata.write_pkg_info(cmd.egg_info)
6679
  File "/usr/share/miniconda/conda-bld/ros-noetic-image-geometry_1637272499147/_h_env_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placeho/lib/python3.8/distutils/dist.py", line 1117, in write_pkg_info
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    self.write_pkg_file(pkg_info)
6681
  File "/usr/share/miniconda/conda-bld/ros-noetic-image-geometry_1637272499147/_h_env_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placeho/lib/python3.8/site-packages/setuptools/dist.py", line 167, in write_pkg_file
6682
    write_field('Summary', single_line(self.get_description()))
6683
  File "/usr/share/miniconda/conda-bld/ros-noetic-image-geometry_1637272499147/_h_env_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placeho/lib/python3.8/site-packages/setuptools/dist.py", line 151, in single_line
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    raise ValueError('Newlines are not allowed')
6685
ValueError: Newlines are not allowed
6686
CMake Error at catkin_generated/safe_execute_install.cmake:4 (message):

This will obviously take a while before it shows up in Debian builds because setuptools is far behind, but we encounter the issue in RoboStack already as we have up-to-date setuptools in conda-forge.

/cc @wolfv

[Tobias-Fischer]

#316 looks nicer.