====================
Packaging guidelines
====================

Downstream packagers often want to package Hypothesis. Here are some guidelines.

The primary guideline is this: If you are not prepared to keep up with the Hypothesis release schedule,
don't. You will be doing your users a disservice.

Hypothesis has a very frequent release schedule. We often release new versions multiple times a week.

If you *are* prepared to keep up with this schedule, you might find the rest of this document useful.

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Release tarballs
----------------

These are available from :gh-link:`the GitHub releases page <releases>`. The
tarballs on PyPI are intended for installation from a Python tool such as :pypi:`pip` and should not
be considered complete releases. Requests to include additional files in them will not be granted. Their absence
is not a bug.


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Dependencies
------------

~~~~~~~~~~~~~~~
Python versions
~~~~~~~~~~~~~~~

Hypothesis is designed to work with a range of Python versions - we support
`all versions of CPython with upstream support <https://devguide.python.org/#status-of-python-branches>`_.
We also support the latest versions of PyPy for Python 3.

~~~~~~~~~~~~~~~~~~~~~~
Other Python libraries
~~~~~~~~~~~~~~~~~~~~~~

Hypothesis has *mandatory* dependencies on the following libraries:

* :pypi:`sortedcontainers`

Hypothesis has *optional* dependencies on the following libraries:

.. literalinclude:: ../pyproject.toml
   :prepend: [project.optional-dependencies]
   :start-after: [project.optional-dependencies]
   :end-before: # Avoid changing this by hand

The way this works when installing Hypothesis normally is that these features become available if the relevant
library is installed.

Specifically for :pypi:`pytest`, our plugin supports versions of pytest which
have been out of upstream support for some time.  Hypothesis tests can still
be executed by even older versions of pytest - you just won't have the plugin
to provide automatic marks, helpful usage warnings, and per-test statistics.

------------------
Testing Hypothesis
------------------

If you want to test Hypothesis as part of your packaging you will probably not want to use the mechanisms
Hypothesis itself uses for running its tests, because it has a lot of logic for installing and testing against
different versions of Python.

The tests must be run with fairly recent tooling; check the :gh-link:`tree/master/requirements/`
directory for details.

The organisation of the tests is described in the :gh-file:`hypothesis/tests/README.rst`.

--------
Examples
--------

* `arch linux <https://archlinux.org/packages/extra/any/python-hypothesis/>`_
* `fedora <https://src.fedoraproject.org/rpms/python-hypothesis>`_
* `gentoo <https://packages.gentoo.org/packages/dev-python/hypothesis>`_
