Pytest-cov

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* Fixed ``RemovedInPytest4Warning`` when using Pytest 3.10.
Contributed by Michael Manganiello in `354 <https://github.com/pytest-dev/pytest-cov/pull/354>`_.
* Made pytest startup faster when plugin not active by lazy-importing.
Contributed by Anders Hovmöller in `339 <https://github.com/pytest-dev/pytest-cov/pull/339>`_.
* Various CI improvements.
Contributed by Daniel Hahler in `363 <https://github.com/pytest-dev/pytest-cov/pull/363>`_ and
`364 <https://github.com/pytest-dev/pytest-cov/pull/364>`_.
* Various Python support updates (drop EOL 3.4, test against 3.8 final).
Contributed by Hugo van Kemenade in
`336 <https://github.com/pytest-dev/pytest-cov/pull/336>`_ and
`367 <https://github.com/pytest-dev/pytest-cov/pull/367>`_.
* Changed ``--cov-append`` to always enable ``data_suffix`` (a coverage setting).
Contributed by Harm Geerts in
`387 <https://github.com/pytest-dev/pytest-cov/pull/387>`_.
* Changed ``--cov-append`` to handle loading previous data better
(fixes various path aliasing issues).
* Various other testing improvements, github issue templates, example updates.
* Fixed internal failures that are caused by tests that change the current working directory by
ensuring a consistent working directory when coverage is called.
See `306 <https://github.com/pytest-dev/pytest-cov/issues/306>`_ and
`coveragepy881 <https://github.com/nedbat/coveragepy/issues/881>`_

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* Fixed `348 <https://github.com/pytest-dev/pytest-cov/issues/348>`_ -
regression when only certain reports (html or xml) are used then ``--cov-fail-under`` always fails.

------------------

* Fixed ``RecursionError`` that can occur when using
`cleanup_on_signal <https://pytest-cov.readthedocs.io/en/latest/subprocess-support.html#if-you-got-custom-signal-handling>`__ or
`cleanup_on_sigterm <https://pytest-cov.readthedocs.io/en/latest/subprocess-support.html#if-you-got-custom-signal-handling>`__.
See: `294 <https://github.com/pytest-dev/pytest-cov/issues/294>`_.
The 2.7.x releases of pytest-cov should be considered broken regarding aforementioned cleanup API.
* Added compatibility with future xdist release that deprecates some internals
(match pytest-xdist master/worker terminology).
Contributed by Thomas Grainger in `321 <https://github.com/pytest-dev/pytest-cov/pull/321>`_
* Fixed breakage that occurs when multiple reporting options are used.
Contributed by Thomas Grainger in `338 <https://github.com/pytest-dev/pytest-cov/pull/338>`_.
* Changed internals to use a stub instead of ``os.devnull``.
Contributed by Thomas Grainger in `332 <https://github.com/pytest-dev/pytest-cov/pull/332>`_.
* Added support for Coverage 5.0.
Contributed by Ned Batchelder in `319 <https://github.com/pytest-dev/pytest-cov/pull/319>`_.
* Added support for float values in ``--cov-fail-under``.
Contributed by Martín Gaitán in `311 <https://github.com/pytest-dev/pytest-cov/pull/311>`_.
* Various documentation fixes. Contributed by
Juanjo Bazán,
Andrew Murray and
Albert Tugushev in
`298 <https://github.com/pytest-dev/pytest-cov/pull/298>`_,
`299 <https://github.com/pytest-dev/pytest-cov/pull/299>`_ and
`307 <https://github.com/pytest-dev/pytest-cov/pull/307>`_.
* Various testing improvements. Contributed by
Ned Batchelder,
Daniel Hahler,
Ionel Cristian Mărieș and
Hugo van Kemenade in
`313 <https://github.com/pytest-dev/pytest-cov/pull/313>`_,
`314 <https://github.com/pytest-dev/pytest-cov/pull/314>`_,
`315 <https://github.com/pytest-dev/pytest-cov/pull/315>`_,
`316 <https://github.com/pytest-dev/pytest-cov/pull/316>`_,
`325 <https://github.com/pytest-dev/pytest-cov/pull/325>`_,
`326 <https://github.com/pytest-dev/pytest-cov/pull/326>`_,
`334 <https://github.com/pytest-dev/pytest-cov/pull/334>`_ and
`335 <https://github.com/pytest-dev/pytest-cov/pull/335>`_.
* Added the ``--cov-context`` CLI options that enables coverage contexts. Only works with coverage 5.0+.
Contributed by Ned Batchelder in `345 <https://github.com/pytest-dev/pytest-cov/pull/345>`_.

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* Fixed source distribution manifest so that garbage ain't included in the tarball.

------------------

* Fixed ``AttributeError: 'NoneType' object has no attribute 'configure_node'`` error when ``--no-cov`` is used.
Contributed by Alexander Shadchin in `263 <https://github.com/pytest-dev/pytest-cov/pull/263>`_.
* Various testing and CI improvements. Contributed by Daniel Hahler in
`255 <https://github.com/pytest-dev/pytest-cov/pull/255>`_,
`266 <https://github.com/pytest-dev/pytest-cov/pull/266>`_,
`272 <https://github.com/pytest-dev/pytest-cov/pull/272>`_,
`271 <https://github.com/pytest-dev/pytest-cov/pull/271>`_ and
`269 <https://github.com/pytest-dev/pytest-cov/pull/269>`_.
* Improved ``pytest_cov.embed.cleanup_on_sigterm`` to be reentrant (signal deliveries while signal handling is
running won't break stuff).
* Added ``pytest_cov.embed.cleanup_on_signal`` for customized cleanup.
* Improved cleanup code and fixed various issues with leftover data files. All contributed in
`265 <https://github.com/pytest-dev/pytest-cov/pull/265>`_ or
`262 <https://github.com/pytest-dev/pytest-cov/pull/262>`_.
* Improved examples. Now there are two examples for the common project layouts, complete with working coverage
configuration. The examples have CI testing. Contributed in
`267 <https://github.com/pytest-dev/pytest-cov/pull/267>`_.
* Improved help text for CLI options.

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* Added support for Pytest 4.1. Contributed by Daniel Hahler and Семён Марьясин in
`253 <https://github.com/pytest-dev/pytest-cov/pull/253>`_ and
`230 <https://github.com/pytest-dev/pytest-cov/pull/230>`_.
* Various test and docs fixes. Contributed by Daniel Hahler in
`224 <https://github.com/pytest-dev/pytest-cov/pull/224>`_ and
`223 <https://github.com/pytest-dev/pytest-cov/pull/223>`_.
* Fixed the "Module already imported" issue (`211 <https://github.com/pytest-dev/pytest-cov/issues/211>`_).
Contributed by Daniel Hahler in `228 <https://github.com/pytest-dev/pytest-cov/pull/228>`_.