Merge pull request #1838 from inclement/update_contributing_doc

Documented the development and release models

Author: inclement

README.md

@@ -3,8 +3,8 @@ python-for-android
 
 [![Build Status](https://travis-ci.org/kivy/python-for-android.svg?branch=master)](https://travis-ci.org/kivy/python-for-android)
 [![Coverage Status](https://coveralls.io/repos/github/kivy/python-for-android/badge.svg?branch=master&kill_cache=1)](https://coveralls.io/github/kivy/python-for-android?branch=master)
-[![Backers on Open Collective](https://opencollective.com/kivy/backers/badge.svg)](#backers) 
-[![Sponsors on Open Collective](https://opencollective.com/kivy/sponsors/badge.svg)](#sponsors) 
+[![Backers on Open Collective](https://opencollective.com/kivy/backers/badge.svg)](#backers)
+[![Sponsors on Open Collective](https://opencollective.com/kivy/sponsors/badge.svg)](#sponsors)
 
 python-for-android is a packager for Python apps on Android. You can
 create your own Python distribution including the modules and
@@ -69,9 +69,15 @@ We also have [#support Discord channel](https://chat.kivy.org/).
 
 ## Contributing
 
-We love pull requests and discussing novel ideas. Check out our
-[contribution guide](http://kivy.org/docs/contribute.html) and feel
-free to improve python-for-android.
+We love pull requests and discussing novel ideas. Check out the Kivy
+project [contribution guide](http://kivy.org/docs/contribute.html) and
+feel free to improve python-for-android.
+
+See [our
+documentation](https://python-for-android.readthedocs.io/en/latest/contribute/)
+for more information about the python-for-android development and
+release model, but don't worry about the details. You just need to
+make a pull request, we'll take care of the rest.
 
 The following mailing list and IRC channel are used exclusively for
 discussions about developing the Kivy framework and its sister projects:
@@ -139,4 +145,3 @@ Support this project by becoming a sponsor. Your logo will show up here with a l
 <a href="https://opencollective.com/kivy/sponsor/7/website" target="_blank"><img src="https://opencollective.com/kivy/sponsor/7/avatar.svg"></a>
 <a href="https://opencollective.com/kivy/sponsor/8/website" target="_blank"><img src="https://opencollective.com/kivy/sponsor/8/avatar.svg"></a>
 <a href="https://opencollective.com/kivy/sponsor/9/website" target="_blank"><img src="https://opencollective.com/kivy/sponsor/9/avatar.svg"></a>
-

doc/source/contribute.rst

@@ -1,8 +1,73 @@
-Contributing
-============
+Development and Contributing
+============================
 
 The development of python-for-android is managed by the Kivy team `via
 Github <https://github.com/kivy/python-for-android>`_.
 
 Issues and pull requests are welcome via the integrated `issue tracker
 <https://github.com/kivy/python-for-android/issues>`_.
+
+Read on for more information about how we manage development and
+releases, but don't worry about the details! Pull requests are welcome
+and we'll deal with the rest.
+
+Development model
+-----------------
+
+python-for-android is developed using the following model::
+
+- The ``master`` branch always represents the latest stable release.
+- The ``develop`` branch is the most up to date with new contributions.
+- Releases happen periodically, and consist of merging the current ``develop`` branch into ``master``.
+
+For reference, this is based on a `Git flow
+<https://nvie.com/posts/a-successful-git-branching-model/>`__ model,
+although we don't follow this religiously.
+
+Versioning
+----------
+
+python-for-android releases currently use `calendar versioning
+<https://calver.org/>`__. Release numbers are of the form
+YYYY.MM.DD. We aim to create a new release every four weeks, but more
+frequent releases are also possible.
+
+We use calendar versioning because in practice, changes in
+python-for-android are often driven by updates or adjustments in the
+Android build tools. It's usually best for users to be working from
+the latest release. We try to maintain backwards compatibility even
+while internals are changing.
+
+
+Creating a new release
+----------------------
+
+New releases follow these steps:
+
+- Create a new branch ``release/YYYY.MM.DD`` based on the ``develop`` branch.
+  - ``git checkout -b release/YYYY.MM.DD develop``
+- Create a Github pull request to merge ``release/YYYY.MM.DD`` into ``master``.
+- Complete all steps in the `release checklist <release_checklist_>`_,
+  and document this in the pull request (copy the checklist into the PR text)
+
+At this point, wait for reviewer approval and conclude any discussion that arises. To complete the release:
+
+- Merge the release branch to the ``master`` branch.
+- Also merge the release branch to the ``develop`` branch.
+- Tag the release commit in ``master``. Include a short summary of the changes.
+- Create the release distributions: ``python3 setup.py sdist``
+- Upload the release to pypi: ``python3 -m twine upload``.
+- Upload the release ``.tar.gz`` to the Github tag.
+
+.. _release_checklist:
+
+Release checklist
+~~~~~~~~~~~~~~~~~
+
+- [ ] Check that the [build is passing](https://travis-ci.org/kivy/python-for-android)
+- [ ] Run the tests locally via `tox`: this performs some long-running tests that are skipped on Travis.
+- [ ] Build and run the [on_device_unit_tests](https://github.com/kivy/python-for-android/tree/master/testapps/on_device_unit_tests) app using buildozer. Check that they all pass.
+- [ ] Build and run the following [testapps](https://github.com/kivy/python-for-android/tree/master/testapps) for arch `armeabi-v7a` and `arm64-v8a`:
+  - [ ] `python3 setup_testapp_python3_sqlite_openssl.py apk`
+  - [ ] `python3 setup_testapp_python2.py apk`
+- [ ] Check that the version number is correct