mopidy/docs/development/contributing.rst
2010-03-27 13:49:40 +01:00

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*****************
How to contribute
*****************
Development of Mopidy is coordinated through the IRC channel ``#mopidy`` at
``irc.freenode.net`` and through `GitHub <http://github.com/>`_.
Code style
==========
- Follow :pep:`8` unless otherwise noted. `pep8.py
<http://pypi.python.org/pypi/pep8/>`_ can be used to check your code against
the guidelines, however remember that matching the style of the surrounding
code is also important.
- Use four spaces for indentation, *never* tabs.
- Use CamelCase with initial caps for class names::
ClassNameWithCamelCase
- Use underscore to split variable, function and method names for
readability. Don't use CamelCase.
::
lower_case_with_underscores
- Use the fact that empty strings, lists and tuples are :class:`False` and
don't compare boolean values using ``==`` and ``!=``.
- Follow whitespace rules as described in :pep:`8`. Good examples::
spam(ham[1], {eggs: 2})
spam(1)
dict['key'] = list[index]
- Limit lines to 80 characters and avoid trailing whitespace. However note that
wrapped lines should be *one* indentation level in from level above, except
for ``if``, ``for``, ``with``, and ``while`` lines which should have two
levels of indentation::
if (foo and bar ...
baz and foobar):
a = 1
from foobar import (foo, bar, ...
baz)
- For consistency, prefer ``'`` over ``"`` for strings, unless the string
contains ``'``.
- Take a look at :pep:`20` for a nice peek into a general mindset useful for
Python coding.
Commit guidelines
=================
- Keep commits small and on topic.
- If a commit looks too big you should be working in a feature branch not a
single commit.
- Merge feature branches with ``--no-ff`` to keep track of the merge.
Running tests
=============
To run tests, you need a couple of dependencies. They can be installed through
Debian/Ubuntu package management::
sudo aptitude install python-coverage python-nose
Or, they can be installed using ``pip``::
sudo pip install -r requirements-tests.txt
Then, to run all tests, go to the project directory and run::
nosetests
For example::
$ nosetests
......................................................................
......................................................................
......................................................................
.......
----------------------------------------------------------------------
Ran 217 tests in 0.267s
OK
To run tests with test coverage statistics::
nosetests --with-coverage
For more documentation on testing, check out the `nose documentation
<http://somethingaboutorange.com/mrl/projects/nose/>`_.
.. note::
The test coverage report at http://www.mopidy.com/coverage/ is
automatically updated within 10 minutes after an update is pushed to
``jodal/mopidy/master`` at GitHub.
Writing documentation
=====================
To write documentation, we use `Sphinx <http://sphinx.pocoo.org/>`_. See their
site for lots of documentation on how to use Sphinx. To generate HTML or LaTeX
from the documentation files, you need some additional dependencies.
You can install them through Debian/Ubuntu package management::
sudo aptitude install python-sphinx python-pygraphviz graphviz
Then, to generate docs::
cd docs/
make # For help on available targets
make html # To generate HTML docs
.. note::
The documentation at http://www.mopidy.com/docs/ is automatically updated
within 10 minutes after a documentation update is pushed to
``jodal/mopidy/master`` at GitHub.