Buildbot

Bug fixes
---------

- Fix `Build.getUrl()` to not ignore virtual builders.
- Fix git submodule support when using `sshPrivateKey` and `sshHostKey`
settings by passing ssh data as absolute, not relative paths.
- Fixed :bb:step:`P4` for change in latest version of `p4 login -p`.
- :py:class:`buildbot.reporters.irc.IrcStatusBot` no longer encodes messages
before passing them on to methods of its Twisted base class to avoid posting
the ``repr()`` of a bytes object when running on Python 3.

Features
--------

- Added new :bb:step:`GitPush` step to perform git push operations.
- Objects returned by :ref:`renderer` now are able to pass extra arguments to
the rendered function via `withArgs` method.

Test Suite
----------

- Test suite has been improved for readability by adding a lot of ``inlineCallbacks``
- Fixed tests which didn't wait for ``assertFailure``'s returned deferred.
- The test suite now runs on Python 3.7 (mostly deprecation warnings from dependencies shut down)

=====================================

Bug fixes
---------

- buildbot-worker docker image no longer use pidfile. This allows to
auto-restart a docker worker upon crash.
- GitLab v3 API is deprecated and has been removed from http://gitlab.com, so
we now use v4. (:issue:`4143`)

Features
--------

- -:bb:step:`Git` now supports `sshHostKey` parameter to specify ssh public
host key for fetch operations.
- -:bb:step:`Git` now supports `sshPrivateKey` parameter to specify private ssh
key for fetch operations.
- -:bb:chsrc:`GitPoller` now supports `sshHostKey` parameter to specify ssh
public host key for fetch operations. This feature is supported on git 2.3
and newer.
- -:bb:chsrc:`GitPoller` now supports `sshPrivateKey` parameter to specify
private ssh key for fetch operations. This feature is supported on git 2.3
and newer.
- Github hook token validation now uses ``hmac.compare_digest()`` for better security

Deprecations and Removals
-------------------------

- Removed support for GitLab v3 API ( GitLab < 9 ).

=====================================

Bug fixes
---------

- Fix issue which marked all workers dis-configured in the database every 24h
(:issue:`3981` :issue:`3956` :issue:`3970`)
- The :bb:reporter:`MailNotifier` no longer crashes when sending from/to email
addresses with "Real Name" parts (e.g., ``John Doe <john.doedomain.tld>``).
- Corrected pluralization of text on landing page of the web UI

Improved Documentation
----------------------

- Corrected typo in description of libvirt
- Update sample config to use preferred API

Misc Improvements
-----------------

- Home page now contains links to recently active builders