Developing with OpenStackClient

Communication

Meetings

The OpenStackClient team meets regularly on every Thursday. For details please refer to the OpenStack IRC meetings page.

Testing

Tox prerequisites and installation

Install the prerequisites for Tox:

  • On Ubuntu or Debian:

    $ 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:

    $ yum install gcc python-devel libxml2-devel libxslt-devel

  • On openSUSE or SUSE linux Enterprise:

    $ zypper install gcc python-devel libxml2-devel libxslt-devel

Install python-tox:

$ pip install tox

To run the full suite of tests maintained within OpenStackClient.

$ 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:

$ 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:

$ tox -e functional

To run a specific functional test:

$ 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:

$ tox -e debug openstackclient.tests.identity.v3.test_group

For reference, the debug tox environment implements the instructions

Building the Documentation

The documentation is generated with Sphinx using the tox command. To create HTML docs, run the commands:

$ 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.

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:

$ 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:

$ 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:

$ python setup.py develop

or

$ pip install -e .

Standardize Import Format

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

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