=======
CHANGES
=======

v22.0.5
-------

* #604: Restore repository for upload_docs command
  to restore publishing of docs during release.

v22.0.4
-------

* #589: Upload releases to pypi.io using the upload
  hostname and legacy path.

v22.0.3
-------

* #589: Releases are now uploaded to pypi.io (Warehouse)
  even when releases are made on Twine via Travis.

v22.0.2
-------

* #589: Releases are now uploaded to pypi.io (Warehouse).

v22.0.1
-------

* #190: On Python 2, if unicode is passed for packages to
  ``build_py`` command, it will be handled just as with
  text on Python 3.

v22.0.0
-------

Intended to be v21.3.0, but jaraco accidentally released as
a major bump.

* #598: Setuptools now lists itself first in the User-Agent
  for web requests, better following the guidelines in
  `RFC 7231
  <https://tools.ietf.org/html/rfc7231#section-5.5.3>`_.

v21.2.2
-------

* Minor fixes to changelog and docs.

v21.2.1
-------

* #261: Exclude directories when resolving globs in
  package_data.

v21.2.0
-------

* #539: In the easy_install get_site_dirs, honor all
  paths found in ``site.getsitepackages``.

v21.1.0
-------

* #572: In build_ext, now always import ``_CONFIG_VARS``
  from ``distutils`` rather than from ``sysconfig``
  to allow ``distutils.sysconfig.customize_compiler``
  configure the OS X compiler for ``-dynamiclib``.

v21.0.0
-------

* Removed ez_setup.py from Setuptools sdist. The
  bootstrap script will be maintained in its own
  branch and should be generally be retrieved from
  its canonical location at
  https://bootstrap.pypa.io/ez_setup.py.

v20.10.0
--------

* #553: egg_info section is now generated in a
  deterministic order, matching the order generated
  by earlier versions of Python. Except on Python 2.6,
  order is preserved when existing settings are present.
* #556: Update to Packaging 16.7, restoring support
  for deprecated ``python_implmentation`` marker.
* #555: Upload command now prompts for a password
  when uploading to PyPI (or other repository) if no
  password is present in .pypirc or in the keyring.

v20.9.0
-------

* #548: Update certify version to 2016.2.28
* #545: Safely handle deletion of non-zip eggs in rotate
  command.

v20.8.1
-------

* Issue #544: Fix issue with extra environment marker
  processing in WorkingSet due to refactor in v20.7.0.

v20.8.0
-------

* Issue #543: Re-release so that latest release doesn't
  cause déjà vu with distribute and setuptools 0.7 in
  older environments.

v20.7.0
-------

* Refactored extra enviroment marker processing
  in WorkingSet.
* Issue #533: Fixed intermittent test failures.
* Issue #536: In msvc9_support, trap additional exceptions
  that might occur when importing
  ``distutils.msvc9compiler`` in mingw environments.
* Issue #537: Provide better context when package
  metadata fails to decode in UTF-8.

v20.6.8
-------

* Issue #523: Restored support for environment markers,
  now honoring 'extra' environment markers.

v20.6.7
-------

* Issue #523: Disabled support for environment markers
  introduced in v20.5.

v20.6.6
-------

* Issue #503: Restore support for PEP 345 environment
  markers by updating to Packaging 16.6.

v20.6.0
-------

* New release process that relies on
  `bumpversion <https://github.com/peritus/bumpversion>`_
  and Travis CI for continuous deployment.
* Project versioning semantics now follow
  `semver <https://semver.org>`_ precisely.
  The 'v' prefix on version numbers now also allows
  version numbers to be referenced in the changelog,
  e.g. https://pythonhosted.org/setuptools/history.html#v20-6-0.

20.5
----

* BB Pull Request #185, #470: Add support for environment markers
  in requirements in install_requires, setup_requires,
  tests_require as well as adding a test for the existing
  extra_requires machinery.

20.4
----

* Issue #422: Moved hosting to
  `Github <https://github.com/pypa/setuptools>`_
  from `Bitbucket <https://bitbucket.org/pypa/setuptools>`_.
  Issues have been migrated, though all issues and comments
  are attributed to bb-migration. So if you have a particular
  issue or issues to which you've been subscribed, you will
  want to "watch" the equivalent issue in Github.
  The Bitbucket project will be retained for the indefinite
  future, but Github now hosts the canonical project repository.

20.3.1
------

* Issue #519: Remove import hook when reloading the
  ``pkg_resources`` module.
* BB Pull Request #184: Update documentation in ``pkg_resources``
  around new ``Requirement`` implementation.

20.3
----

* BB Pull Request #179: ``pkg_resources.Requirement`` objects are
  now a subclass of ``packaging.requirements.Requirement``,
  allowing any environment markers and url (if any) to be
  affiliated with the requirement
* BB Pull Request #179: Restore use of RequirementParseError
  exception unintentionally dropped in 20.2.

20.2.2
------

* Issue #502: Correct regression in parsing of multiple
  version specifiers separated by commas and spaces.

20.2.1
------

* Issue #499: Restore compatiblity for legacy versions
  by bumping to packaging 16.4.

20.2
----

* Changelog now includes release dates and links to PEPs.
* BB Pull Request #173: Replace dual PEP 345 _markerlib implementation
  and PEP 426 implementation of environment marker support from
  packaging 16.1 and PEP 508. Fixes Issue #122.
  See also BB Pull Request #175, BB Pull Request #168, and
  BB Pull Request #164. Additionally:

   - ``Requirement.parse`` no longer retains the order of extras.
   - ``parse_requirements`` now requires that all versions be
     PEP-440 compliant, as revealed in #499. Packages released
     with invalid local versions should be re-released using
     the proper local version syntax, e.g. ``mypkg-1.0+myorg.1``.

20.1.1
------

* Update ``upload_docs`` command to also honor keyring
  for password resolution.

20.1
----

* Added support for using passwords from keyring in the upload
  command. See `the upload docs
  <http://pythonhosted.org/setuptools/setuptools.html#upload-upload-source-and-or-egg-distributions-to-pypi>`_
  for details.

20.0
----

* Issue #118: Once again omit the package metadata (egg-info)
  from the list of outputs in ``--record``. This version of setuptools
  can no longer be used to upgrade pip earlier than 6.0.

19.7
----

* `Off-project PR <https://github.com/jaraco/setuptools/pull/32>`_:
  For FreeBSD, also honor root certificates from ca_root_nss.

19.6.2
------

* Issue #491: Correct regression incurred in 19.4 where
  a double-namespace package installed using pip would
  cause a TypeError.

19.6.1
------

* Restore compatibility for PyPy 3 compatibility lost in
  19.4.1 addressing Issue #487.
* ``setuptools.launch`` shim now loads scripts in a new
  namespace, avoiding getting relative imports from
  the setuptools package on Python 2.

19.6
----

* Added a new entry script ``setuptools.launch``,
  implementing the shim found in
  ``pip.util.setuptools_build``. Use this command to launch
  distutils-only packages under setuptools in the same way that
  pip does, causing the setuptools monkeypatching of distutils
  to be invoked prior to invoking a script. Useful for debugging
  or otherwise installing a distutils-only package under
  setuptools when pip isn't available or otherwise does not
  expose the desired functionality. For example::

    $ python -m setuptools.launch setup.py develop

* Issue #488: Fix dual manifestation of Extension class in
  extension packages installed as dependencies when Cython
  is present.

19.5
----

* Issue #486: Correct TypeError when getfilesystemencoding
  returns None.
* Issue #139: Clarified the license as MIT.
* BB Pull Request #169: Removed special handling of command
  spec in scripts for Jython.

19.4.1
------

* Issue #487: Use direct invocation of ``importlib.machinery``
  in ``pkg_resources`` to avoid missing detection on relevant
  platforms.

19.4
----

* Issue #341: Correct error in path handling of package data
  files in ``build_py`` command when package is empty.
* Distribute #323, Issue #141, Issue #207, and
  BB Pull Request #167: Another implementation of
  ``pkg_resources.WorkingSet`` and ``pkg_resources.Distribution``
  that supports replacing an extant package with a new one,
  allowing for setup_requires dependencies to supersede installed
  packages for the session.

19.3
----

* Issue #229: Implement new technique for readily incorporating
  dependencies conditionally from vendored copies or primary
  locations. Adds a new dependency on six.

19.2
----

* BB Pull Request #163: Add get_command_list method to Distribution.
* BB Pull Request #162: Add missing whitespace to multiline string
  literals.

19.1.1
------

* Issue #476: Cast version to string (using default encoding)
  to avoid creating Unicode types on Python 2 clients.
* Issue #477: In Powershell downloader, use explicit rendering
  of strings, rather than rely on ``repr``, which can be
  incorrect (especially on Python 2).

19.1
----

* Issue #215: The bootstrap script ``ez_setup.py`` now
  automatically detects
  the latest version of setuptools (using PyPI JSON API) rather
  than hard-coding a particular value.
* Issue #475: Fix incorrect usage in _translate_metadata2.

19.0
----

* Issue #442: Use RawConfigParser for parsing .pypirc file.
  Interpolated values are no longer honored in .pypirc files.

18.8.1
------

* Issue #440: Prevent infinite recursion when a SandboxViolation
  or other UnpickleableException occurs in a sandbox context
  with setuptools hidden. Fixes regression introduced in Setuptools
  12.0.

18.8
----

* Deprecated ``egg_info.get_pkg_info_revision``.
* Issue #471: Don't rely on repr for an HTML attribute value in
  package_index.
* Issue #419: Avoid errors in FileMetadata when the metadata directory
  is broken.
* Issue #472: Remove deprecated use of 'U' in mode parameter
  when opening files.

18.7.1
------

* Issue #469: Refactored logic for Issue #419 fix to re-use metadata
  loading from Provider.

18.7
----

* Update dependency on certify.
* BB Pull Request #160: Improve detection of gui script in
  ``easy_install._adjust_header``.
* Made ``test.test_args`` a non-data property; alternate fix
  for the issue reported in BB Pull Request #155.
* Issue #453: In ``ez_setup`` bootstrap module, unload all
  ``pkg_resources`` modules following download.
* BB Pull Request #158: Honor PEP-488 when excluding
  files for namespace packages.
* Issue #419 and BB Pull Request #144: Add experimental support for
  reading the version info from distutils-installed metadata rather
  than using the version in the filename.

18.6.1
------

* Issue #464: Correct regression in invocation of superclass on old-style
  class on Python 2.

18.6
----

* Issue #439: When installing entry_point scripts under development,
  omit the version number of the package, allowing any version of the
  package to be used.

18.5
----

* In preparation for dropping support for Python 3.2, a warning is
  now logged when pkg_resources is imported on Python 3.2 or earlier
  Python 3 versions.
* `Add support for python_platform_implementation environment marker
  <https://github.com/jaraco/setuptools/pull/28>`_.
* `Fix dictionary mutation during iteration
  <https://github.com/jaraco/setuptools/pull/29>`_.

18.4
----

* Issue #446: Test command now always invokes unittest, even
  if no test suite is supplied.

18.3.2
------

* Correct another regression in setuptools.findall
  where the fix for Python #12885 was lost.

18.3.1
------

* Issue #425: Correct regression in setuptools.findall.

18.3
----

* Setuptools now allows disabling of the manipulation of the sys.path
  during the processing of the easy-install.pth file. To do so, set
  the environment variable ``SETUPTOOLS_SYS_PATH_TECHNIQUE`` to
  anything but "rewrite" (consider "raw"). During any install operation
  with manipulation disabled, setuptools packages will be appended to
  sys.path naturally.

  Future versions may change the default behavior to disable
  manipulation. If so, the default behavior can be retained by setting
  the variable to "rewrite".

* Issue #257: ``easy_install --version`` now shows more detail
  about the installation location and Python version.

* Refactor setuptools.findall in preparation for re-submission
  back to distutils.

18.2
----

* Issue #412: More efficient directory search in ``find_packages``.

18.1
----

* Upgrade to vendored packaging 15.3.

18.0.1
------

* Issue #401: Fix failure in test suite.

18.0
----

* Dropped support for builds with Pyrex. Only Cython is supported.
* Issue #288: Detect Cython later in the build process, after
  ``setup_requires`` dependencies are resolved.
  Projects backed by Cython can now be readily built
  with a ``setup_requires`` dependency. For example::

    ext = setuptools.Extension('mylib', ['src/CythonStuff.pyx', 'src/CStuff.c'])
    setuptools.setup(
        ...
        ext_modules=[ext],
        setup_requires=['cython'],
    )

  For compatibility with older versions of setuptools, packagers should
  still include ``src/CythonMod.c`` in the source distributions or
  require that Cython be present before building source distributions.
  However, for systems with this build of setuptools, Cython will be
  downloaded on demand.
* Issue #396: Fixed test failure on OS X.
* BB Pull Request #136: Remove excessive quoting from shebang headers
  for Jython.

17.1.1
------

* Backed out unintended changes to pkg_resources, restoring removal of
  deprecated imp module (`ref
  <https://bitbucket.org/pypa/setuptools/commits/f572ec9563d647fa8d4ffc534f2af8070ea07a8b#comment-1881283>`_).

17.1
----

* Issue #380: Add support for range operators on environment
  marker evaluation.

17.0
----

* Issue #378: Do not use internal importlib._bootstrap module.
* Issue #390: Disallow console scripts with path separators in
  the name. Removes unintended functionality and brings behavior
  into parity with pip.

16.0
----

* BB Pull Request #130: Better error messages for errors in
  parsed requirements.
* BB Pull Request #133: Removed ``setuptools.tests`` from the
  installed packages.
* BB Pull Request #129: Address deprecation warning due to usage
  of imp module.

15.2
----

* Issue #373: Provisionally expose
  ``pkg_resources._initialize_master_working_set``, allowing for
  imperative re-initialization of the master working set.

15.1
----

* Updated to Packaging 15.1 to address Packaging #28.
* Fix ``setuptools.sandbox._execfile()`` with Python 3.1.

15.0
----

* BB Pull Request #126: DistributionNotFound message now lists the package or
  packages that required it. E.g.::

      pkg_resources.DistributionNotFound: The 'colorama>=0.3.1' distribution was not found and is required by smlib.log.

  Note that zc.buildout once dependended on the string rendering of this
  message to determine the package that was not found. This expectation
  has since been changed, but older versions of buildout may experience
  problems. See Buildout #242 for details.

14.3.1
------

* Issue #307: Removed PEP-440 warning during parsing of versions
  in ``pkg_resources.Distribution``.
* Issue #364: Replace deprecated usage with recommended usage of
  ``EntryPoint.load``.

14.3
----

* Issue #254: When creating temporary egg cache on Unix, use mode 755
  for creating the directory to avoid the subsequent warning if
  the directory is group writable.

14.2
----

* Issue #137: Update ``Distribution.hashcmp`` so that Distributions with
  None for pyversion or platform can be compared against Distributions
  defining those attributes.

14.1.1
------

* Issue #360: Removed undesirable behavior from test runs, preventing
  write tests and installation to system site packages.

14.1
----

* BB Pull Request #125: Add ``__ne__`` to Requirement class.
* Various refactoring of easy_install.

14.0
----

* Bootstrap script now accepts ``--to-dir`` to customize save directory or
  allow for re-use of existing repository of setuptools versions. See
  BB Pull Request #112 for background.
* Issue #285: ``easy_install`` no longer will default to installing
  packages to the "user site packages" directory if it is itself installed
  there. Instead, the user must pass ``--user`` in all cases to install
  packages to the user site packages.
  This behavior now matches that of "pip install". To configure
  an environment to always install to the user site packages, consider
  using the "install-dir" and "scripts-dir" parameters to easy_install
  through an appropriate distutils config file.

13.0.2
------

* Issue #359: Include pytest.ini in the sdist so invocation of py.test on the
  sdist honors the pytest configuration.

13.0.1
------

Re-release of 13.0. Intermittent connectivity issues caused the release
process to fail and PyPI uploads no longer accept files for 13.0.

13.0
----

* Issue #356: Back out BB Pull Request #119 as it requires Setuptools 10 or later
  as the source during an upgrade.
* Removed build_py class from setup.py. According to 892f439d216e, this
  functionality was added to support upgrades from old Distribute versions,
  0.6.5 and 0.6.6.

12.4
----

* BB Pull Request #119: Restore writing of ``setup_requires`` to metadata
  (previously added in 8.4 and removed in 9.0).

12.3
----

* Documentation is now linked using the rst.linker package.
* Fix ``setuptools.command.easy_install.extract_wininst_cfg()``
  with Python 2.6 and 2.7.
* Issue #354. Added documentation on building setuptools
  documentation.

12.2
----

* Issue #345: Unload all modules under pkg_resources during
  ``ez_setup.use_setuptools()``.
* Issue #336: Removed deprecation from ``ez_setup.use_setuptools``,
  as it is clearly still used by buildout's bootstrap. ``ez_setup``
  remains deprecated for use by individual packages.
* Simplified implementation of ``ez_setup.use_setuptools``.

12.1
----

* BB Pull Request #118: Soften warning for non-normalized versions in
  Distribution.

12.0.5
------

* Issue #339: Correct Attribute reference in ``cant_write_to_target``.
* Issue #336: Deprecated ``ez_setup.use_setuptools``.

12.0.4
------

* Issue #335: Fix script header generation on Windows.

12.0.3
------

* Fixed incorrect class attribute in ``install_scripts``. Tests would be nice.

12.0.2
------

* Issue #331: Fixed ``install_scripts`` command on Windows systems corrupting
  the header.

12.0.1
------

* Restore ``setuptools.command.easy_install.sys_executable`` for pbr
  compatibility. For the future, tools should construct a CommandSpec
  explicitly.

12.0
----

* Issue #188: Setuptools now support multiple entities in the value for
  ``build.executable``, such that an executable of "/usr/bin/env my-python" may
  be specified. This means that systems with a specified executable whose name
  has spaces in the path must be updated to escape or quote that value.
* Deprecated ``easy_install.ScriptWriter.get_writer``, replaced by ``.best()``
  with slightly different semantics (no force_windows flag).

11.3.1
------

* Issue #327: Formalize and restore support for any printable character in an
  entry point name.

11.3
----

* Expose ``EntryPoint.resolve`` in place of EntryPoint._load, implementing the
  simple, non-requiring load. Deprecated all uses of ``EntryPoint._load``
  except for calling with no parameters, which is just a shortcut for
  ``ep.require(); ep.resolve();``.

  Apps currently invoking ``ep.load(require=False)`` should instead do the
  following if wanting to avoid the deprecating warning::

    getattr(ep, "resolve", lambda: ep.load(require=False))()

11.2
----

* Pip #2326: Report deprecation warning at stacklevel 2 for easier diagnosis.

11.1
----

* Issue #281: Since Setuptools 6.1 (Issue #268), a ValueError would be raised
  in certain cases where VersionConflict was raised with two arguments, which
  occurred in ``pkg_resources.WorkingSet.find``. This release adds support
  for indicating the dependent packages while maintaining support for
  a VersionConflict when no dependent package context is known. New unit tests
  now capture the expected interface.

11.0
----

* Interop #3: Upgrade to Packaging 15.0; updates to PEP 440 so that >1.7 does
  not exclude 1.7.1 but does exclude 1.7.0 and 1.7.0.post1.

10.2.1
------

* Issue #323: Fix regression in entry point name parsing.

10.2
----

* Deprecated use of EntryPoint.load(require=False). Passing a boolean to a
  function to select behavior is an anti-pattern. Instead use
  ``Entrypoint._load()``.
* Substantial refactoring of all unit tests. Tests are now much leaner and
  re-use a lot of fixtures and contexts for better clarity of purpose.

10.1
----

* Issue #320: Added a compatibility implementation of
  ``sdist._default_revctrl``
  so that systems relying on that interface do not fail (namely, Ubuntu 12.04
  and similar Debian releases).

10.0.1
------

* Issue #319: Fixed issue installing pure distutils packages.

10.0
----

* Issue #313: Removed built-in support for subversion. Projects wishing to
  retain support for subversion will need to use a third party library. The
  extant implementation is being ported to `setuptools_svn
  <https://pypi.python.org/pypi/setuptools_svn>`_.
* Issue #315: Updated setuptools to hide its own loaded modules during
  installation of another package. This change will enable setuptools to
  upgrade (or downgrade) itself even when its own metadata and implementation
  change.

9.1
---

* Prefer vendored packaging library `as recommended
  <https://github.com/jaraco/setuptools/commit/170657b68f4b92e7e1bf82f5e19a831f5744af67#commitcomment-9109448>`_.

9.0.1
-----

* Issue #312: Restored presence of pkg_resources API tests (doctest) to sdist.

9.0
---

* Issue #314: Disabled support for ``setup_requires`` metadata to avoid issue
  where Setuptools was unable to upgrade over earlier versions.

8.4
---

* BB Pull Request #106: Now write ``setup_requires`` metadata.

8.3
---

* Issue #311: Decoupled pkg_resources from setuptools once again.
  ``pkg_resources`` is now a package instead of a module.

8.2.1
-----

* Issue #306: Suppress warnings about Version format except in select scenarios
  (such as installation).

8.2
---

* BB Pull Request #85: Search egg-base when adding egg-info to manifest.

8.1
---

* Upgrade ``packaging`` to 14.5, giving preference to "rc" as designator for
  release candidates over "c".
* PEP-440 warnings are now raised as their own class,
  ``pkg_resources.PEP440Warning``, instead of RuntimeWarning.
* Disabled warnings on empty versions.

8.0.4
-----

* Upgrade ``packaging`` to 14.4, fixing an error where there is a
  different result for if 2.0.5 is contained within >2.0dev and >2.0.dev even
  though normalization rules should have made them equal.
* Issue #296: Add warning when a version is parsed as legacy. This warning will
  make it easier for developers to recognize deprecated version numbers.

8.0.3
-----

* Issue #296: Restored support for ``__hash__`` on parse_version results.

8.0.2
-----

* Issue #296: Restored support for ``__getitem__`` and sort operations on
  parse_version result.

8.0.1
-----

* Issue #296: Restore support for iteration over parse_version result, but
  deprecated that usage with a warning. Fixes failure with buildout.

8.0
---

* Implement PEP 440 within
  pkg_resources and setuptools. This change
  deprecates some version numbers such that they will no longer be installable
  without using the ``===`` escape hatch. See `the changes to test_resources
  <https://bitbucket.org/pypa/setuptools/commits/dcd552da643c4448056de84c73d56da6d70769d5#chg-setuptools/tests/test_resources.py>`_
  for specific examples of version numbers and specifiers that are no longer
  supported. Setuptools now "vendors" the `packaging
  <https://github.com/pypa/packaging>`_ library.

7.0
---

* Issue #80, Issue #209: Eggs that are downloaded for ``setup_requires``,
  ``test_requires``, etc. are now placed in a ``./.eggs`` directory instead of
  directly in the current directory. This choice of location means the files
  can be readily managed (removed, ignored). Additionally,
  later phases or invocations of setuptools will not detect the package as
  already installed and ignore it for permanent install (See #209).

  This change is indicated as backward-incompatible as installations that
  depend on the installation in the current directory will need to account for
  the new location. Systems that ignore ``*.egg`` will probably need to be
  adapted to ignore ``.eggs``. The files will need to be manually moved or
  will be retrieved again. Most use cases will require no attention.

6.1
---

* Issue #268: When resolving package versions, a VersionConflict now reports
  which package previously required the conflicting version.

6.0.2
-----

* Issue #262: Fixed regression in pip install due to egg-info directories
  being omitted. Re-opens Issue #118.

6.0.1
-----

* Issue #259: Fixed regression with namespace package handling on ``single
  version, externally managed`` installs.

6.0
---

* Issue #100: When building a distribution, Setuptools will no longer match
  default files using platform-dependent case sensitivity, but rather will
  only match the files if their case matches exactly. As a result, on Windows
  and other case-insensitive file systems, files with names such as
  'readme.txt' or 'README.TXT' will be omitted from the distribution and a
  warning will be issued indicating that 'README.txt' was not found. Other
  filenames affected are:

    - README.rst
    - README
    - setup.cfg
    - setup.py (or the script name)
    - test/test*.py

  Any users producing distributions with filenames that match those above
  case-insensitively, but not case-sensitively, should rename those files in
  their repository for better portability.
* BB Pull Request #72: When using ``single_version_externally_managed``, the
  exclusion list now includes Python 3.2 ``__pycache__`` entries.
* BB Pull Request #76 and BB Pull Request #78: lines in top_level.txt are now
  ordered deterministically.
* Issue #118: The egg-info directory is now no longer included in the list
  of outputs.
* Issue #258: Setuptools now patches distutils msvc9compiler to
  recognize the specially-packaged compiler package for easy extension module
  support on Python 2.6, 2.7, and 3.2.

5.8
---

* Issue #237: ``pkg_resources`` now uses explicit detection of Python 2 vs.
  Python 3, supporting environments where builtins have been patched to make
  Python 3 look more like Python 2.

5.7
---

* Issue #240: Based on real-world performance measures against 5.4, zip
  manifests are now cached in all circumstances. The
  ``PKG_RESOURCES_CACHE_ZIP_MANIFESTS`` environment variable is no longer
  relevant. The observed "memory increase" referenced in the 5.4 release
  notes and detailed in Issue #154 was likely not an increase over the status
  quo, but rather only an increase over not storing the zip info at all.

5.6
---

* Issue #242: Use absolute imports in svn_utils to avoid issues if the
  installing package adds an xml module to the path.

5.5.1
-----

* Issue #239: Fix typo in 5.5 such that fix did not take.

5.5
---

* Issue #239: Setuptools now includes the setup_requires directive on
  Distribution objects and validates the syntax just like install_requires
  and tests_require directives.

5.4.2
-----

* Issue #236: Corrected regression in execfile implementation for Python 2.6.

5.4.1
-----

* Python #7776: (ssl_support) Correct usage of host for validation when
  tunneling for HTTPS.

5.4
---

* Issue #154: ``pkg_resources`` will now cache the zip manifests rather than
  re-processing the same file from disk multiple times, but only if the
  environment variable ``PKG_RESOURCES_CACHE_ZIP_MANIFESTS`` is set. Clients
  that package many modules in the same zip file will see some improvement
  in startup time by enabling this feature. This feature is not enabled by
  default because it causes a substantial increase in memory usage.

5.3
---

* Issue #185: Make svn tagging work on the new style SVN metadata.
  Thanks cazabon!
* Prune revision control directories (e.g .svn) from base path
  as well as sub-directories.

5.2
---

* Added a `Developer Guide
  <https://pythonhosted.org/setuptools/developer-guide.html>`_ to the official
  documentation.
* Some code refactoring and cleanup was done with no intended behavioral
  changes.
* During install_egg_info, the generated lines for namespace package .pth
  files are now processed even during a dry run.

5.1
---

* Issue #202: Implemented more robust cache invalidation for the ZipImporter,
  building on the work in Issue #168. Special thanks to Jurko Gospodnetic and
  PJE.

5.0.2