Tolerate distributions with no Name

[cjwatson]

https://bugs.debian.org/1090247 shows a napari test failure caused by this on Python 3.13. On closer inspection I found that /usr/lib/python3.13/dist-packages/coverage-7.6.0.egg-info and /usr/lib/python3.13/dist-packages/tqdm-4.67.1.dist-info existed with no Name metadata field. This shouldn't cause a failure here.

[jni]

Thanks for the PR @cjwatson! You've caught us at an awkward time because npe2api relied on web scraping PyPI search results for some functionality, and that was recently broken by PyPI due to abuse. I think this is why the CI is failing. We're still figuring out the best fix but it'll probably be minimum 1-2 weeks until a fix because of the Christmas/New Year's break. 🙏

[jni]

For other devs stumbling on this, this is the relevant bit of the report:

self = ReaderContribution(command='tmp_plugin._', filename_patterns=['*.fake'], accepts_directories=False)

    @property
    def plugin_name(self) -> str:
        """Return the manifest/plugin name for this contribution."""
        if not self._plugin_name:
            # we will likely never get here if the contribution was created
            # as a member of a PluginManifest.
            # But if not, we can use a couple heuristics...
            from importlib.metadata import distributions
    
            # look for a package name in the command id
>           dists = sorted(
                (d.metadata["Name"] for d in distributions()), key=len, reverse=True
            )
E           TypeError: object of type 'NoneType' has no len()

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 100.00%. Comparing base (e61a8af) to head (7b334e1).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff            @@
##              main      #368   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           37        37           
  Lines         2709      2709           
=========================================
  Hits          2709      2709           

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[DragaDoncila]

OK the reason we would ever be checking the plugin_name of tqdm here is because of the discover utility which goes through installed packages looking for npe2 manifests (or npe1 entrypoints). The effect of this change, I believe, is that if a napari plugin does not declare a name in its distribution metadata, it would not be discovered as a plugin. I think this is ok, and likely to be an extreme edge case, so I'm happy to merge the change as-is.