pup tries to `pip install` any file in `./build/pup/`? Fails when the OS creates metadata files

[carlosperate]

Running pup inside a docker container, mounting the macOS host filesystem (for the Mu repo) into the container:

docker run -v $(pwd):/home --rm ghcr.io/mu-editor/mu-appimage:2022.05.01 bash -c "pip install . && python -m mu.wheels --package && pip install pup==1.0.0a17 && pup package --launch-module=mu --nice-name='Mu Editor' --icon-path=./mu/resources/images/icon.png --license-path=./LICENSE ."

When it comes to the pup part:

20221115 131057 I pup pup 1.0.0a17 - starting with PID=111
20221115 131057 I pup.api Package '.': starting.
20221115 131057 I pup.plugins.metadata Collecting metadata for '.'.
20221115 131057 I pup.plugins.metadata Packaging local project at '/home'.
20221115 131057 I pup.plugins.metadata About to run '/python/bin/python3.8 -m pip wheel --no-deps /home'.
20221115 131057 I pup.plugins.metadata pip out: Processing /home
20221115 131057 I pup.plugins.metadata pip out:   Preparing metadata (setup.py): started
20221115 131059 I pup.plugins.metadata pip out:   Preparing metadata (setup.py): finished with status 'done'
20221115 131059 I pup.plugins.metadata pip out: Building wheels for collected packages: mu-editor
20221115 131059 I pup.plugins.metadata pip out:   Building wheel for mu-editor (setup.py): started
20221115 131117 I pup.plugins.metadata pip out:   Building wheel for mu-editor (setup.py): finished with status 'done'
20221115 131117 I pup.plugins.metadata pip out:   Created wheel for mu-editor: filename=mu_editor-1.1.2-py3-none-any.whl size=49860106 sha256=9e88c9cb7d080363dca3fb9e89f8d60cfe8ff3be6e5da78340f585180730576e
20221115 131117 I pup.plugins.metadata pip out:   Stored in directory: /tmp/pip-ephem-wheel-cache-dkyypzci/wheels/ca/d0/93/fbd585043e7e8c744cf5e0d3d167303a7cb9893e8a403c9bb8
20221115 131117 I pup.plugins.metadata pip out: Successfully built mu-editor
20221115 131118 I pup.plugins.metadata pip err: WARNING: You are using pip version 22.0.4; however, version 22.3.1 is available.
20221115 131118 I pup.plugins.metadata pip err: You should consider upgrading via the '/python/bin/python3.8 -m pip install --upgrade pip' command.
20221115 131118 C pup Execution failure: Not a known wheel archive format or installed .dist-info: /home/build/pup/.DS_Store
20221115 131118 C pup Traceback below:
Traceback (most recent call last):
  File "/python/lib/python3.8/site-packages/pup/__main__.py", line 31, in wrapper
    exit_code = command_function(*args, **kw)
  File "/python/lib/python3.8/site-packages/pup/__main__.py", line 82, in package
    return api.package(
  File "/python/lib/python3.8/site-packages/pup/api.py", line 60, in package
    dsp.collect_src_metadata()
  File "/python/lib/python3.8/site-packages/pup/dispatcher.py", line 94, in collect_src_metadata
    return self._invoke_plugin('pup.metadata')
  File "/python/lib/python3.8/site-packages/pup/dispatcher.py", line 68, in _invoke_plugin
    return plugin(self._ctx, self, **kwargs)
  File "/python/lib/python3.8/site-packages/pup/plugins/metadata.py", line 78, in __call__
    ctx.src_metadata = pkginfo.Wheel(wheel_file)
  File "/python/lib/python3.8/site-packages/pkginfo/wheel.py", line 16, in __init__
    self.extractMetadata()
  File "/python/lib/python3.8/site-packages/pkginfo/distribution.py", line 115, in extractMetadata
    data = self.read()
  File "/python/lib/python3.8/site-packages/pkginfo/wheel.py", line 42, in read
    raise ValueError('Not a known wheel archive format or '
ValueError: Not a known wheel archive format or installed .dist-info: /home/build/pup/.DS_Store
20221115 131118 I pup pup 1.0.0a17 - done

The .DS_Store file was created by macOS, so it looks like pup tries to pip install any file in the ./build/pup/ directory?