Contributions are welcome, and they are greatly appreciated! Every little bit helps, and credit will always be given.

You can contribute in many ways:

Types of Contributions

Report Bugs

Report bugs at

When reporting a bug, please include:

  • Your operating system name and version.
  • Any details about your local setup that might be helpful in troubleshooting.
  • Detailed steps to reproduce the bug.

Fix Bugs

Look through the GitHub issues for bugs. Anything tagged with “bug” and “help wanted” is open to whomever wants to implement it.

Implement Features

Look through the GitHub issues for features. Anything tagged with “enhancement” and “help wanted” is open to whomever wants to implement it.

Write Documentation

CumulusCI could always use more documentation, whether as part of the official CumulusCI docs, in docstrings, or even on the web in blog posts, articles, and such.

Submit Feedback

The best way to send feedback is to file an issue at

If you are proposing a feature:

  • Explain in detail how it would work.
  • Keep the scope as narrow as possible, to make it easier to implement.
  • Remember that this is a volunteer-driven project, and that contributions are welcome :)

Get Started!

Ready to contribute? Here’s how to set up CumulusCI for local development.

  1. Fork the CumulusCI repo on GitHub.

  2. Clone your fork to your local workspace.

  3. Create a fresh virtual environment using virtualenv and install development requirements:

    $ pip install -r requirements_dev.txt
  4. Install pre-commit hooks for black and flake8:

    $ pre-commit install --install-hooks
  5. After making changes, run the tests and make sure they all pass:

    $ pytest
  6. Your new code should also have meaningful tests. One way to double check that your tests cover everything is to ensure that your new code has test code coverage:

    $ make coverage

  7. Push your changes to GitHub and submit a pull request. The base branch should be a new feature branch that we create to receive the changes (contact us to create the branch). This allows us to test the changes using our build system before merging to master.

Note that we enable typeguard with pytest so if you add type declarations to your code, those declarations will be treated as runtime assertions in your python tests. MyPy validation is also on our roadmap.

Pull Request Guidelines

Before you submit a pull request, check that it meets these guidelines:

  • Documentation is updated to reflect all changes.
  • New classes, functions, etc have docstrings.
  • New code has comments.
  • Code style and file structure is similar to the rest of the project.
  • You have run the black code formatter.

Releasing CumulusCI

It’s easy to release a version of CumulusCI to GitHub and PyPI! First, create a new branch for your version:

$ git checkout -b feature/newversion

After committing any updates to HISTORY.rst and the docs, bump the version:

$ bump2version patch
$ git push -u origin HEAD

Open a Pull Request on GitHub and request approval from another committer. Once your PR has been merged, you can create the release tag and then push the artifacts PyPI with twine:

$ git checkout master
$ git pull
$ make tag release

You can then create a pull request to update the Homebrew Tap:

$ make release-homebrew

Finally, head to the Release object that was autocreated in the GitHub repository, paste in the changelog notes and hit publish. Tada! You’ve published a new version of CCI.

Configuring Your Environment

To release CCI, you’ll need twine and bump2version, both of which are installed with the development requirements. You’ll also need to configure your pypirc file with your PyPI credentials. The release-homebrew build step depends on the jq command line utility and is available via Homebrew or your package manager.