Virtualenv

~~~~~~~~~~~~~~~~~
- Having `distutils configuration <https://docs.python.org/3/install/index.html#distutils-configuration-files>`_
files that set ``prefix`` and ``install_scripts`` cause installation of packages in the wrong location -
by :user:`gaborbernat`. (`1663 <https://github.com/pypa/virtualenv/issues/1663>`_)
- Fix ``PYTHONPATH`` being overridden on Python 2 — by :user:`jd`. (`1673 <https://github.com/pypa/virtualenv/issues/1673>`_)
- Fix list configuration value parsing from config file or environment variable - by :user:`gaborbernat`. (`1674 <https://github.com/pypa/virtualenv/issues/1674>`_)
- Fix Batch activation script shell prompt to display environment name by default - by :user:`spetafree`. (`1679 <https://github.com/pypa/virtualenv/issues/1679>`_)
- Fix startup on Python 2 is slower for virtualenv - this was due to setuptools calculating it's working set distribution
- by :user:`gaborbernat`. (`1682 <https://github.com/pypa/virtualenv/issues/1682>`_)
- Fix entry points are not populated for editable installs on Python 2 due to setuptools working set being calculated
before ``easy_install.pth`` runs - by :user:`gaborbernat`. (`1684 <https://github.com/pypa/virtualenv/issues/1684>`_)
- Fix ``attr:`` import fails for setuptools - by :user:`gaborbernat`. (`1685 <https://github.com/pypa/virtualenv/issues/1685>`_)

~~~~~~~~~~~~~~~~~
- Disable distutils fixup for python 3 until `pypa/pip 7778 <https://github.com/pypa/pip/issues/7778>`_ is fixed and
released - by :user:`gaborbernat`. (`1669 <https://github.com/pypa/virtualenv/issues/1669>`_)

~~~~~~~~~~~~~~~~~
- Fix global site package always being added with bundled macOs python framework builds - by :user:`gaborbernat`. (`1561 <https://github.com/pypa/virtualenv/issues/1561>`_)
- Fix generated scripts use host version info rather than target - by :user:`gaborbernat`. (`1600 <https://github.com/pypa/virtualenv/issues/1600>`_)
- Fix circular prefix reference with single elements (accept these as if they were system executables, print a info about
them referencing themselves) - by :user:`gaborbernat`. (`1632 <https://github.com/pypa/virtualenv/issues/1632>`_)
- Handle the case when the application data folder is read-only:

- the application data folder is now controllable via :option:`app-data`,
- ``clear-app-data`` now cleans the entire application data folder, not just the ``app-data`` seeder path,
- check if the application data path passed in does not exist or is read-only, and fallback to a temporary directory,
- temporary directory application data is automatically cleaned up at the end of execution,
- :option:`symlink-app-data` is always ``False`` when the application data is temporary

by :user:`gaborbernat`. (`1640 <https://github.com/pypa/virtualenv/issues/1640>`_)
- Fix PyPy 2 builtin modules are imported from standard library, rather than from builtin - by :user:`gaborbernat`. (`1652 <https://github.com/pypa/virtualenv/issues/1652>`_)
- Fix creation of entry points when path contains spaces - by :user:`nsoranzo`. (`1660 <https://github.com/pypa/virtualenv/issues/1660>`_)
- Fix relative paths for the zipapp (for python ``3.7+``) - by :user:`gaborbernat`. (`1666 <https://github.com/pypa/virtualenv/issues/1666>`_)

~~~~~~~~~~~~~~~~~
- Add macOs Python 2 Framework support (now we test it with the CI via brew) - by :user:`gaborbernat` (`1561 <https://github.com/pypa/virtualenv/issues/1561>`_)
- Fix losing of libpypy-c.so when the pypy executable is a symlink - by :user:`asottile` (`1614 <https://github.com/pypa/virtualenv/issues/1614>`_)
- Discover python interpreter in a case insensitive manner - by :user:`PrajwalM2212` (`1624 <https://github.com/pypa/virtualenv/issues/1624>`_)
- Fix cross interpreter support when the host python sets ``sys.base_executable`` based on ``__PYVENV_LAUNCHER__`` -
by :user:`cjolowicz` (`1643 <https://github.com/pypa/virtualenv/issues/1643>`_)

~~~~~~~~~~~~~~~~~
- Allow the use of ``/`` as pathname component separator on Windows - by ``vphilippon`` (`1582 <https://github.com/pypa/virtualenv/issues/1582>`_)
- Lower minimal version of six required to 1.9 - by ``ssbarnea`` (`1606 <https://github.com/pypa/virtualenv/issues/1606>`_)

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
- Document a programmatic API as ``from virtualenv import cli_run`` under :ref:`programmatic_api` -
by :user:`gaborbernat`. (`1585 <https://github.com/pypa/virtualenv/issues/1585>`_)