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Deprecating commands
====================
There are times when commands need to be deprecated due to rename or removal.
The process for command deprecation is:
1. Push up a change for review which deprecates the command(s).
- The change should print a deprecation warning to ``stderr`` each time a
deprecated command is used.
- That warning message should include a rough timeline for when the command
will be removed and what should be used instead, if anything.
- The description in the help text for the deprecated command should mark
that it is deprecated.
- The change should include a release note with the ``deprecations`` section
filled out.
- The deprecation cycle is typically the first client release *after* the
next *full* nova server release so that there is at least six months of
deprecation.
2. Once the change is approved, have a member of the `nova-release`_ team
release a new version of `python-novaclient`.
.. _nova-release: https://review.openstack.org/#/admin/groups/147,members
3. Example: `<https://review.openstack.org/#/c/185141/>`_
This change was made while the nova 12.0.0 Liberty release was in
development. The current version of `python-novaclient` at the time was
2.25.0. Once the change was merged, `python-novaclient` 2.26.0 was released.
Since there was less than six months before 12.0.0 would be released, the
deprecation cycle ran through the 13.0.0 nova server release.
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