python-openstackclient/doc/source/contributor/developing.rst

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===============================
Developing with OpenStackClient
===============================
Communication
-------------
Meetings
========
The OpenStackClient team meets regularly on every Thursday. For details
please refer to the `OpenStack IRC meetings`_ page.
.. _`OpenStack IRC meetings`: http://eavesdrop.openstack.org/#OpenStackClient_Team_Meeting
Testing
-------
Tox prerequisites and installation
==================================
Install the prerequisites for Tox:
* On Ubuntu or Debian:
.. code-block:: bash
$ apt-get install gcc gettext python-dev libxml2-dev libxslt1-dev \
zlib1g-dev
You may need to use pip install for some packages.
* On RHEL or CentOS including Fedora:
.. code-block:: bash
$ yum install gcc python-devel libxml2-devel libxslt-devel
* On openSUSE or SUSE linux Enterprise:
.. code-block:: bash
$ zypper install gcc python-devel libxml2-devel libxslt-devel
Install python-tox:
.. code-block:: bash
$ pip install tox
To run the full suite of tests maintained within OpenStackClient.
.. code-block:: bash
$ tox
.. NOTE::
The first time you run ``tox``, it will take additional time to build
virtualenvs. You can later use the ``-r`` option with ``tox`` to rebuild
your virtualenv in a similar manner.
To run tests for one or more specific test environments(for example, the most common configuration of
Python 2.7 and PEP-8), list the environments with the ``-e`` option, separated by spaces:
.. code-block:: bash
$ tox -e py27,pep8
See ``tox.ini`` for the full list of available test environments.
Running functional tests
========================
OpenStackClient also maintains a set of functional tests that are optimally
designed to be run against OpenStack's gate. Optionally, a developer may
choose to run these tests against any OpenStack deployment, however depending
on the services available, results vary.
To run the entire suite of functional tests:
.. code-block:: bash
$ tox -e functional
To run a specific functional test:
.. code-block:: bash
$ tox -e functional -- --regex functional.tests.compute.v2.test_server
Running with PDB
================
Using PDB breakpoints with ``tox`` and ``testr`` normally does not work since
the tests fail with a `BdbQuit` exception rather than stopping at the
breakpoint.
To run with PDB breakpoints during testing, use the `debug` ``tox`` environment
rather than ``py27``. For example, passing a test name since you will normally
only want to run the test that hits your breakpoint:
.. code-block:: bash
$ tox -e debug openstackclient.tests.identity.v3.test_group
For reference, the `debug`_ ``tox`` environment implements the instructions
.. _`debug`: https://wiki.openstack.org/wiki/Testr#Debugging_.28pdb.29_Tests
Building the Documentation
--------------------------
The documentation is generated with Sphinx using the ``tox`` command. To
create HTML docs, run the commands:
.. code-block:: bash
$ tox -e docs
The resultant HTML will be in the ``doc/build/html`` directory.
Release Notes
-------------
The release notes for a patch should be included in the patch. See the
`Project Team Guide`_ for more information on using reno in OpenStack.
.. _`Project Team Guide`: http://docs.openstack.org/project-team-guide/release-management.html#managing-release-notes
If any of the following applies to the patch, a release note is required:
* The deployer needs to take an action when upgrading
* The plugin interface changes
* A new feature is implemented
* A command or option is removed
* Current behavior is changed
* A security bug is fixed
Reno is used to generate release notes. Use the commands:
.. code-block:: bash
$ tox -e venv -- reno new <bug-,bp-,whatever>
Then edit the sample file that was created and push it with your change.
To run the commands and see results:
.. code-block:: bash
$ git commit # Commit the change because reno scans git log.
$ tox -e releasenotes
At last, look at the generated release notes files in ``releasenotes/build/html`` in your browser.
Testing new code
----------------
If a developer wants to test new code (feature, command or option) that
they have written, OpenStackClient may be installed from source by running
the following commands in the base directory of the project:
.. code-block:: bash
$ python setup.py develop
or
.. code-block:: bash
$ pip install -e .
Standardize Import Format
=========================
.. _`Import Order Guide`: https://docs.openstack.org/hacking/latest/user/hacking.html#imports
The import order shows below:
* {{stdlib imports in human alphabetical order}}
* \n
* {{third-party lib imports in human alphabetical order}}
* \n
* {{project imports in human alphabetical order}}
* \n
* \n
* {{begin your code}}
Example
~~~~~~~
.. code-block:: python
import copy
import fixtures
import mock
import os
from osc_lib.api import auth
from osc_lib import utils
import six
from openstackclient import shell
from openstackclient.tests import utils