3.27 (not yet released)
=======================

New features
------------

* Tests can now be run concurrently across multiple processes. You can use
  `pytest-xdist`_ for that. For tests using `PostgresApptestConfiguration` you
  should be aware that `startpgcluster()` can't run concurrently. Workaround is
  to call pytest with ``--dist=loadfile`` to use a single test process per test
  module or use an existing database cluster and set ``db-host`` and
  ``db-port`` of ``devtools.DEFAULT_PSQL_SOURCES['system']`` accordingly.

.. _pytest-xdist: https://github.com/pytest-dev/pytest-xdist

Backwards incompatible changes
------------------------------

* Standardization on the way to launch a cubicweb instance, from now on the
  only way to do that will be the used the ``pyramid`` command. Therefore:

   * ``cubicweb-ctl`` commands "start", "stop", "restart", "reload" and "status"
     have been removed because they relied on the Twisted web server backend that
     is no longer maintained nor working with Python 3.

   * Twisted web server support has been removed.

   * ``cubicweb-ctl wsgi`` has also been removed.

* Support for legacy cubes (in the 'cubes' python namespace) has been dropped.
  Use of environment variables CW_CUBES_PATH and CUBES_DIR is removed.

* Python 2 support has been dropped.

* Exceptions in notification hooks aren't catched-all anymore during tests so
  one can expect tests that seem to pass (but were actually silently failing)
  to fail now.

Deprecated code drops
---------------------

Most code deprecated until version 3.25 has been dropped.