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============
Contributing
============

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 the `GitHub Issues page`_.

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 whoever wants to implement it.

Implement Features
~~~~~~~~~~~~~~~~~~

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

Write Documentation
~~~~~~~~~~~~~~~~~~~

SDV could always use more documentation, whether as part of the
official SDV 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 the `GitHub Issues page`_.

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 `SDV` for local development.

1. Fork the `SDV` repo on GitHub.
2. Clone your fork locally::

$ git clone git@github.com:your_name_here/SDV.git

3. Install your local copy into a virtualenv. Assuming you have virtualenvwrapper installed,
this is how you set up your fork for local development::

$ mkvirtualenv SDV
$ cd SDV/
$ make install-develop

4. Create a branch for local development::

$ git checkout -b name-of-your-bugfix-or-feature

Try to use the naming scheme of prefixing your branch with ``gh-X`` where X is
the associated issue, such as ``gh-3-fix-foo-bug``. And if you are not
developing on your own fork, further prefix the branch with your GitHub
username, like ``githubusername/gh-3-fix-foo-bug``.

Now you can make your changes locally.

5. While hacking your changes, make sure to cover all your developments with the required
unit tests, and that none of the old tests fail as a consequence of your changes.
For this, make sure to run the tests suite and check the code coverage::

$ make lint # Check code styling
$ make test # Run the tests
$ make coverage # Get the coverage report

6. When you're done making changes, check that your changes pass all the styling checks and
tests, including other Python supported versions, using::

$ make test-all

7. Make also sure to include the necessary documentation in the code as docstrings following
the `Google docstrings style`_.
If you want to view how your documentation will look like when it is published, you can
generate and view the docs with this command::

$ make view-docs

8. Commit your changes and push your branch to GitHub::

$ git add .
$ git commit -m "Your detailed description of your changes."
$ git push origin name-of-your-bugfix-or-feature

9. Submit a pull request through the GitHub website.

Pull Request Guidelines
-----------------------

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

1. It resolves an open GitHub Issue and contains its reference in the title or
the comment. If there is no associated issue, feel free to create one.
2. Whenever possible, it resolves only **one** issue. If your PR resolves more than
one issue, try to split it in more than one pull request.
3. The pull request should include unit tests that cover all the changed code.
4. 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 documentation in an appropriate place.
5. The pull request should work for all the supported Python versions.

Unit Testing Guidelines
-----------------------

All the Unit Tests should comply with the following requirements:

1. Unit Tests should be based only in unittest and pytest modules.

2. The tests that cover a module called ``sdv/path/to/a_module.py``
should be implemented in a separated module called
``tests/sdv/path/to/test_a_module.py``.
Note that the module name has the ``test_`` prefix and is located in a path similar
to the one of the tested module, just inside the ``tests`` folder.

3. Each method of the tested module should have at least one associated test method, and
each test method should cover only **one** use case or scenario.

4. Test case methods should start with the ``test_`` prefix and have descriptive names
that indicate which scenario they cover.
Names such as ``test_some_methed_input_none``, ``test_some_method_value_error`` or
``test_some_method_timeout`` are right, but names like ``test_some_method_1``,
``some_method`` or ``test_error`` are not.

5. Each test should validate only what the code of the method being tested does, and not
cover the behavior of any third party package or tool being used, which is assumed to
work properly as far as it is being passed the right values.

6. Any third party tool that may have any kind of random behavior, such as some Machine
Learning models, databases or Web APIs, will be mocked using the ``mock`` library, and
the only thing that will be tested is that our code passes the right values to them.

7. Unit tests should not use anything from outside the test and the code being tested. This
includes not reading or writing to any file system or database, which will be properly
mocked.

Tips
----

To run a subset of tests::

$ python -m pytest tests.test_sdv
$ python -m pytest -k 'foo'

Release Workflow
----------------

The process of releasing a new version involves several steps combining both ``git`` and
``bumpversion`` which, briefly:

1. Merge what is in ``main`` branch into ``stable`` branch.
2. Update the version in ``setup.cfg``, ``sdv/__init__.py`` and
``HISTORY.md`` files.
3. Create a new git tag pointing at the corresponding commit in ``stable`` branch.
4. Merge the new commit from ``stable`` into ``main``.
5. Update the version in ``setup.cfg`` and ``sdv/__init__.py``
to open the next development iteration.

.. note:: Before starting the process, make sure that ``HISTORY.md`` has been updated with a new
entry that explains the changes that will be included in the new version.
Normally this is just a list of the Pull Requests that have been merged to main
since the last release.

Once this is done, run of the following commands:

1. If you are releasing a patch version::

make release

2. If you are releasing a minor version::

make release-minor

3. If you are releasing a major version::

make release-major

Release Candidates
~~~~~~~~~~~~~~~~~~

Sometimes it is necessary or convenient to upload a release candidate to PyPi as a pre-release,
in order to make some of the new features available for testing on other projects before they
are included in an actual full-blown release.

In order to perform such an action, you can execute::

make release-candidate

This will perform the following actions:

1. Build and upload the current version to PyPi as a pre-release, with the format ``X.Y.Z.devN``

2. Bump the current version to the next release candidate, ``X.Y.Z.dev(N+1)``

After this is done, the new pre-release can be installed by including the ``dev`` section in the
dependency specification, either in ``pyproject.toml``::

dependencies = [
...
'sdv>=X.Y.Z.dev',
...
]
We love our community’s interest in the SDV ecosystem. The SDV software
(and its related libraries) is owned and maintained by DataCebo, Inc.
It is available under the `Business Source License`_ for you to browse.

or in command line::
We support a large set of users with enterprise-specific intricacies and
reliability needs. This has required us to be deliberate about setting
the roadmap for SDV libraries. As a result, we are unable to prioritize
reviewing and accepting external pull requests. As a policy, we will
not be able to accept external contributions.

pip install 'sdv>=X.Y.Z.dev'
**Would you like a bug or feature request to be addressed?** If you haven't
already, we would greatly appreciate it if you could `file an issue`_
instead with the overall description of your problem. We can determine
whether it’s aligned with our framework. Once discussed, our team
typically resolves smaller issues within a few release cycles.
We appreciate your understanding.


.. _GitHub issues page: https://github.com/sdv-dev/SDV/issues
.. _Google docstrings style: https://google.github.io/styleguide/pyguide.html?showone=Comments#Comments
.. _Business Source License: https://github.com/sdv-dev/SDV/blob/main/LICENSE
.. _file an issue: https://github.com/sdv-dev/SDV/issues

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