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CONTRIBUTING.md

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How to contribute

Dependencies

We use poetry to manage the dependencies.

To install them you would need to run install command:

poetry install

To activate your virtualenv run poetry shell.

One magic command

Run make test to run everything we have!

Tests

We use pytest and flake8 for quality control. We also use wemake_python_styleguide to enforce the code quality.

To run all tests:

pytest

To run linting:

flake8 .

Keep in mind: default virtual environment folder excluded by flake8 style checking is .venv. If you want to customize this parameter, you should do this in setup.cfg. These steps are mandatory during the CI.

Type checks

We use mypy to run type checks on our code. To use it:

mypy mappings tests/**/*.py

This step is mandatory during the CI.

Submitting your code

We use trunk based development (we also sometimes call it wemake-git-flow).

What the point of this method?

  1. We use protected master branch, so the only way to push your code is via pull request
  2. We use issue branches: to implement a new feature or to fix a bug create a new branch named issue-$TASKNUMBER
  3. Then create a pull request to master branch
  4. We use git tags to make releases, so we can track what has changed since the latest release

So, this way we achieve an easy and scalable development process which frees us from merging hell and long-living branches.

In this method, the latest version of the app is always in the master branch.

Before submitting

Before submitting your code please do the following steps:

  1. Run pytest to make sure everything was working before
  2. Add any changes you want
  3. Add tests for the new changes
  4. Edit documentation if you have changed something significant
  5. Update CHANGELOG.md with a quick summary of your changes
  6. Run pytest again to make sure it is still working
  7. Run mypy to ensure that types are correct
  8. Run flake8 to ensure that style is correct
  9. Run doc8 to ensure that docs are correct

Other help

You can contribute by spreading a word about this library. It would also be a huge contribution to write a short article on how you are using this project. You can also share your best practices with us.