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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

If you are 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

Certificate Validator could always use more documentation, whether as part of the official Certificate Validator 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 certificate-validator for local development.

  1. Fork the certificate-validator repository on GitHub.

  2. Clone your fork locally:

git clone<username>/certificate-validator.git
  1. Create a virtualenv. Assuming you have virtualenvwrapper installed, this is how you set up your environment for local development:
mkvirtualenv certificate-validator
  1. Install development requirements:
pip install -r requirements_dev.txt
  1. Create a branch for local development:
git checkout -b <branch>

Now you can make your changes locally.

  1. When you're done making changes, check that your changes are formatted correctly and pass tests and checks:
make format && make test
  1. Commit your changes and push your branch to GitHub:
git add .
git commit -m "Your detailed description of your changes."
git push origin <branch>
  1. Submit a pull request through the GitHub website.

Pull Request Guidelines

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

  1. The pull request should include tests.
  2. If the pull request adds functionality, the docs should be updated. Put your new functionality into a function with a docstring, and add the feature to the or docs/.
  3. The pull request should work for Python 3.7.