Error when pip installing (python 3.8)

@SharmilaGoedhart reports an issue when installing. This is exactly the same as the current breakage in Crystalball installation due to upstream regressions in setuptools.

bhugo@bhugo-X550LA ~/Documents/workspace                    [10:18:42] 
(venvshadems) > $ pip install -e ./shadems                            
Obtaining file:///home/bhugo/Documents/workspace/shadems
  Preparing metadata (setup.py) ... error
  error: subprocess-exited-with-error

  × python setup.py egg_info did not run successfully.
  │ exit code: 1
  ╰─> [31 lines of output]
      running egg_info
      creating /tmp/pip-pip-egg-info-efk_zil_/shadems.egg-info
      writing /tmp/pip-pip-egg-info-efk_zil_/shadems.egg-info/PKG-INFO
      Traceback (most recent call last):
        File "<string>", line 2, in <module>
        File "<pip-setuptools-caller>", line 34, in <module>
        File "/home/bhugo/Documents/workspace/shadems/setup.py", line 23, in <module>
          setup(name = PACKAGE_NAME,
        File "/home/bhugo/Documents/workspace/venvshadems/lib/python3.8/site-packages/setuptools/__init__.py", line 87, in setup
          return distutils.core.setup(**attrs)
        File "/home/bhugo/Documents/workspace/venvshadems/lib/python3.8/site-packages/setuptools/_distutils/core.py", line 185, in setup
          return run_commands(dist)
        File "/home/bhugo/Documents/workspace/venvshadems/lib/python3.8/site-packages/setuptools/_distutils/core.py", line 201, in run_commands
          dist.run_commands()
        File "/home/bhugo/Documents/workspace/venvshadems/lib/python3.8/site-packages/setuptools/_distutils/dist.py", line 973, in run_commands
          self.run_command(cmd)
        File "/home/bhugo/Documents/workspace/venvshadems/lib/python3.8/site-packages/setuptools/dist.py", line 1217, in run_command
          super().run_command(command)
        File "/home/bhugo/Documents/workspace/venvshadems/lib/python3.8/site-packages/setuptools/_distutils/dist.py", line 992, in run_command
          cmd_obj.run()
        File "/home/bhugo/Documents/workspace/venvshadems/lib/python3.8/site-packages/setuptools/command/egg_info.py", line 301, in run
          writer(self, ep.name, os.path.join(self.egg_info, ep.name))
        File "/home/bhugo/Documents/workspace/venvshadems/lib/python3.8/site-packages/setuptools/command/egg_info.py", line 675, in write_pkg_info
          metadata.write_pkg_info(cmd.egg_info)
        File "/home/bhugo/Documents/workspace/venvshadems/lib/python3.8/site-packages/setuptools/_distutils/dist.py", line 1141, in write_pkg_info
          self.write_pkg_file(pkg_info)
        File "/home/bhugo/Documents/workspace/venvshadems/lib/python3.8/site-packages/setuptools/dist.py", line 197, in write_pkg_file
          write_field('License', rfc822_escape(license))
        File "/home/bhugo/Documents/workspace/venvshadems/lib/python3.8/site-packages/setuptools/_distutils/util.py", line 517, in rfc822_escape
          lines = header.split('\n')
      AttributeError: 'list' object has no attribute 'split'
      [end of output]

  note: This error originates from a subprocess, and is likely not a problem with pip.
error: metadata-generation-failed

× Encountered error while generating package metadata.
╰─> See above for output.

note: This is an issue with the package mentioned above, not pip.
hint: See above for details.

I believe the problem stems from here: https://github.com/ratt-ru/shadeMS/blob/master/setup.py#L34 This can no longer be a list object.

Downgrading to setuptools==56.0.0 prior to installation should resolve the issue

ratt-ru / shadeMS

Error when pip installing (python 3.8) #99