eee316ce7b
Add a testenv:py27 environment that overrides basepython to 2.7 Unfortunately implicit namespace packages are a Python3 thing [1] so we have to scatter a few __init__.py's around for the test loader under python2 to be able to find the unit test directories. Update documenation to mention this Needed-By: https://review.openstack.org/592768 [1] https://www.python.org/dev/peps/pep-0420/ Change-Id: I9a653666e8a083fb7f3fbb92589fe0467a41e6e6
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Deprecation Policy
Because zuul-jobs is intended for wide use by any Zuul, we try to take care when making backwards incompatible changes.
If we need to do so, we will send a notice to the zuul-announce mailing list describing the change and indicating when it will be merged. We will usually wait at least two weeks between sending the announcement and merging the change.
If the change affects your jobs, and you are unable to adjust to it within the timeframe, please let us know with a message to the zuul-discuss mailing list -- we may be able to adjust the timeframe. Otherwise, you may wish to temporarily switch to a local fork of zuul-jobs (or stop updating it if you already have).
New Zuul Features
When a new feature is available in Zuul, the jobs in zuul-jobs may not be able to immediately take advantage of it. We need to allow time for folks to upgrade their Zuul installations so they will be compatible with the change. In these cases, we will wait four weeks after the first Zuul release with the required feature before merging a change to zuul-jobs which uses it.
Deprecated Zuul Features
Before deprecating a feature in Zuul which is used by zuul-jobs, the usage of the feature must be removed from zuul-jobs according to the deprecation policy described above.
Python Version Policy
zuul-jobs targets Python 2.7 onwards and Python 3.5
onwards (note this differs slightly from Ansible upstream, where the
policy is 2.6 onwards unless libraries depend on newer features. zuul-jobs does not support Python 2.6).
Library code should be written to be compatible with both. There are some tips on this in Ansible and Python 3.