Make error message (for invalid project name) work with Test PyPI

[brainwane]

Right now, when someone tries to upload a package to PyPI but the project name they want to use is not a project name we allow, the error message we send them includes -- hardcoded -- the URL https://pypi.org. Instead, we should use Pyramid's URL routing to refer to the URL of the PyPI in question, thus ensuring that we send error messages that, as appropriate, refer to pypi.org, test.pypi.org, or any other future PyPI.

To fix this, look at warehouse/forklift/legacy.py and tests/unit/forklift/test_legacy.py (the test is test_fails_with_invalid_names), and make changes similar to the changes I made in #3183. If you're used to string substitution/string formatting in Python, this should be a relatively approachable first Warehouse issue.

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[pgadige]

I'm working on this issue.

[brainwane]

Hi @pgadige! Saw your question in IRC about logging in within your local developer environment. As Dustin said, check https://warehouse.readthedocs.io/development/getting-started/#logging-in-to-warehouse . Glad to have you joining us!

You mentioned you're interested in the larger process of building something like Warehouse. I recommend you take a look at:

• the PyPA's list of presentations and articles
• PyPA's history of Python packaging
• the Warehouse roadmap
• blog posts, mailing list messages, and notes from our core developer meetings
• Warehouse application overview