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Contribution Guidelines

Before opening any issues or proposing any pull requests, please do the following:

  1. Read our Contributor's Guide.
  2. Understand our development philosophy.

To get the greatest chance of helpful responses, please also observe the following additional notes.

Questions

The GitHub issue tracker is for bug reports and feature requests. Please do not use it to ask questions about how to use Pipenv. These questions should instead be directed to Stack Overflow. Make sure that your question is tagged with the pipenv tag when asking it on Stack Overflow, to ensure that it is answered promptly and accurately.

Good Bug Reports

Please be aware of the following things when filing bug reports:

  1. Avoid raising duplicate issues. Please use the GitHub issue search feature to check whether your bug report or feature request has been mentioned in the past. Duplicate bug reports and feature requests are a huge maintenance burden on the limited resources of the project. If it is clear from your report that you would have struggled to find the original, that's ok, but if searching for a selection of words in your issue title would have found the duplicate then the issue will likely be closed extremely abruptly.

  2. When filing bug reports about exceptions or tracebacks, please include the complete traceback. Partial tracebacks, or just the exception text, are not helpful. Issues that do not contain complete tracebacks may be closed without warning.

  3. Make sure you provide a suitable amount of information to work with. This means you should provide:

    • Guidance on how to reproduce the issue. Ideally, this should be a small code sample that can be run immediately by the maintainers. Failing that, let us know what you're doing, how often it happens, what environment you're using, etc. Be thorough: it prevents us needing to ask further questions.
    • Tell us what you expected to happen. When we run your example code, what are we expecting to happen? What does "success" look like for your code?
    • Tell us what actually happens. It's not helpful for you to say "it doesn't work" or "it fails". Tell us how it fails: do you get an exception? A hang? The packages installed seem incorrect? How was the actual result different from your expected result?
    • Tell us what version of Pipenv you're using, and how you installed it. Different versions of Pipenv behave differently and have different bugs, and some distributors of Pipenv ship patches on top of the code we supply.

    If you do not provide all of these things, it will take us much longer to fix your problem. If we ask you to clarify these and you never respond, we will close your issue without fixing it.

Development Setup

To get your development environment setup, run:

pip install -e .
pipenv install --dev

This will install the repo version of Pipenv and then install the development dependencies. Once that has completed, you can start developing.

The repo version of Pipenv must be installed over other global versions to resolve conflicts with the pipenv folder being implicitly added to sys.path. See pypa/pipenv#2557 for more details.

Testing

Tests are written in pytest style and can be run very simply:

pytest

This will run all Pipenv tests, which can take awhile. To run a subset of the tests, the standard pytest filters are available, such as:

  • provide a directory or file: pytest tests/unit or pytest tests/unit/test_cmdparse.py
  • provide a keyword expression: pytest -k test_lock_editable_vcs_without_install
  • provide a nodeid: pytest tests/unit/test_cmdparse.py::test_parse
  • provide a test marker: pytest -m lock

Package Index

To speed up testing, tests that rely on a package index for locking and installing use a local server that contains vendored packages in the tests/pypi directory. Each vendored package should have it's own folder containing the necessary releases. When adding a release for a package, it is easiest to use either the .tar.gz or universal wheels (ex: py2.py3-none). If a .tar.gz or universal wheel is not available, add wheels for all available architectures and platforms.