Add project_urls to setup

[jarrodmillman]

These are used by PyPI and other services.

Reference Issues/PRs

What does this implement/fix? Explain your changes.

Any other comments?

[thomasjpfan]

Just curious, how does pypi know which icon to use with the project_urls? For example:

https://pypi.org/project/Django/ and https://pypi.org/project/Flask/ have different keys for their bug tracker and source, but pypi is able to figure out which icon to use. Is pypi parsing the url?

[NicolasHug]

Nitpick but LGTM

[jarrodmillman]

@thomasjpfan

Here is what Flask did:

    project_urls=OrderedDict((
        ('Documentation', 'http://flask.pocoo.org/docs/'),
        ('Code', 'https://github.com/pallets/flask'),
        ('Issue tracker', 'https://github.com/pallets/flask/issues'),
)),

Here is what Django did:

    project_urls={
        'Documentation': 'https://docs.djangoproject.com/',
        'Funding': 'https://www.djangoproject.com/fundraising/',
        'Source': 'https://github.com/django/django',
        'Tracker': 'https://code.djangoproject.com/',
},

According to the documentation (https://setuptools.readthedocs.io/en/latest/setuptools.html):

project_urls
    An arbitrary map of URL names to hyperlinks, allowing more extensible documentation
    of where various resources can be found than the simple url and download_url options
    provide.

Since I wasn't sure how well PyPI would be able to guess what I meant by a term I arbitrarily made up, I just copied the example in the documentation:

    project_urls={
        "Bug Tracker": "https://bugs.example.com/HelloWorld/",
        "Documentation": "https://docs.example.com/HelloWorld/",
        "Source Code": "https://code.example.com/HelloWorld/",
    }

[NicolasHug]

@thomasjpfan I think PyPI has a hard coded logo for the bug tracker (since it's the same for Jango and Flask while they're using different platforms), and it recognizes github repos for the source as a special thing. Or it might just be using the favicon.

[TomDLT]

Thanks @jarrodmillman !