Released v8.0.3

* Make ``install --quiet`` really quiet. See :issue:`3418`.

* Fix a bug when removing packages in python 3: disable INI-style parsing of the
  entry_point.txt file to allow entry point names with colons (:pull:`3434`)

* Normalize generated script files path in RECORD files. (:pull:`3448`)

* Fix bug introduced in 8.0.0 where subcommand output was not shown,
  even when the user specified ``-v`` / ``--verbose``. :issue:`3486`.

* Enable python -W with respect to PipDeprecationWarning. (:pull:`3455`)

* Upgrade distlib to 0.2.2 (fix :issue:`3467`):

  * Improved support for Jython when quoting executables in output scripts.

Released v8.0.2

* Stop attempting to trust the system CA trust store because it's extremely
  common for them to be broken, often in incompatible ways. See #3416.

Released v8.0.1

* Detect CAPaths in addition to CAFiles on platforms that provide them.
* Installing argparse or wsgiref will no longer warn or error - pip will allow
  the installation even though it may be useless (since the installed thing
  will be shadowed by the standard library).
* Upgrading a distutils installed item that is installed outside of a virtual
  environment, while inside of a virtual environment will no longer warn or
  error.
* Fix a bug where pre-releases were showing up in ``pip list --outdated``
  without the ``--pre`` flag.
* Switch the SOABI emulation from using RuntimeWarnings to debug logging.
* Rollback the removal of the ability to uninstall distutils installed items
  until a future date.

Released v8.0.0

* **BACKWARD INCOMPATIBLE** Drop support for Python 3.2.

* **BACKWARD INCOMPATIBLE** Remove the ability to find any files other than the
  ones directly linked from the index or find-links pages.

* **BACKWARD INCOMPATIBLE** Remove the ``--download-cache`` which had been
  deprecated and no-op'd in 6.0.

* **BACKWARD INCOMPATIBLE** Remove the ``--log-explicit-levels`` which had been
  deprecated in 6.0.

* **BACKWARD INCOMPATIBLE** Change pip wheel --wheel-dir default path from
  <cwd>/wheelhouse to <cwd>.

* Deprecate and no-op the ``--allow-external``, ``--allow-all-external``, and
  ``--allow-unverified`` functionality that was added as part of PEP 438. With
  changes made to the repository protocol made in PEP 470, these options are no
  longer functional.

* Allow ``--trusted-host`` within a requirements file. :issue:`2822`.

* Allow ``--process-dependency-links`` within a requirements file. :issue:`1274`.

* Allow ``--pre`` within a requirements file. :issue:`1273`.

* Allow repository URLs with secure transports to count as trusted. (E.g.,
  "git+ssh" is okay.) :issue:`2811`.

* Implement a top-level ``pip download`` command and deprecate
  ``pip install --download``.

* Fixed :issue:`3141`, when uninstalling, look for the case of paths containing
  symlinked directories (:pull:`3154`)

* When installing, if building a wheel fails, clear up the build directory
  before falling back to a source install. :issue:`3047`.

* Fix user directory expansion when ``HOME=/``. Workaround for Python bug
  http://bugs.python.org/issue14768, reported in :issue:`2996`.

* Fixed :issue:`3009`, correct reporting of requirements file line numbers
  (:pull:`3125`)

* Fixed :issue:`1062`, Exception(IOError) for ``pip freeze`` and ``pip list``
  commands with subversion >= 1.7. (:pull:`3346`)

* Provide a spinner showing that progress is happening when installing or
  building a package via ``setup.py``. This will alleviate concerns that
  projects with unusually long build times have with pip appearing to stall.

* Include the functionality of ``peep`` into pip, allowing hashes to be baked
  into a requirements file and ensuring that the packages being downloaded
  match one of those hashes. This is an additional, opt-in security measure
  that, when used, removes the need to trust the repository.

* Fix a bug causing pip to not select a wheel compiled against an OSX SDK later
  than what Python itself was compiled against when running on a newer version
  of OSX.

* Add a new ``--prefix`` option for ``pip install`` that supports wheels and
  sdists. (:pull:`3252`)

* Fixed :issue:`2042` regarding wheel building with setup.py using a different
  encoding than the system.

* Drop PasteScript specific egg_info hack. (:pull:`3270`)

* Allow combination of pip list options --editable with --outdated/--updtodate.
  (:issue:`933`)

* Gives VCS implementations control over saying whether a project
  is under their control (:pull:`3258`)

* Git detection now works when ``setup.py`` is not at the Git repo root
  and when ``package_dir`` is used, so ``pip freeze`` works in more
  cases (:pull:`3258`)

* Correctly freeze Git develop packages in presence of the &subdirectory
  option (:pull:`3258`)

* The detection of editable packages now relies on the presence of ``.egg-link``
  instead of looking for a VCS, so ``pip list -e`` is more reliable
  (:pull:`3258`)

* Add the ``--prefix`` flag to ``pip install`` which allows specifying a root
  prefix to use instead of ``sys.prefix`` (:pull:`3252`).

* Allow duplicate specifications in the case that only the extras differ, and
  union all specified extras together (:pull:`3198`).

* Fix the detection of the user's current platform on OSX when determining the
  OSX SDK version (:pull:`3232`).

* Prevent the automatically built wheels from mistakenly being used across
  multiple versions of Python when they may not be correctly configured for
  that by making the wheel specific to a specific version of Python and
  specific interpreter (:pull:`3225`).

* Emulate the SOABI support in wheels from Python 2.x on Python 2.x as closely
  as we can with the information available within the interpreter
  (:pull:`3075`).

* Don't roundtrip to the network when git is pinned to a specific commit hash
  and that hash already exists locally (:pull:`3066`).

* Prefer wheels built against a newer SDK to wheels built against an older SDK
  on OSX (:pull:`3163`).

* Show entry points for projects installed via wheel (:pull:`3122`).

* Improve message when an unexisting path is passed to --find-links option
  (:issue:`2968`).

* pip freeze does not add the VCS branch/tag name in the #egg=... fragment anymore
  (:pull:`3312`).

* Warn on installation of editable if the provided #egg=name part does not
  match the metadata produced by `setup.py egg_info`. :issue:`3143`.

* Add support for .xz files for python versions supporting them (>= 3.3).
  :issue:`722`.

Released v7.1.2

* Don't raise an error if pip is not installed when checking for the latest pip
  version.

Released v7.1.1

* Check that the wheel cache directory is writable before we attempt to write
  cached files to them.

* Move the pip version check until *after* any installs have been performed,
  thus removing the extraenous warning when upgrading pip.

* Added debug logging when using a cached wheel.

* Respect platlib by default on platforms that have it separated from purlib.

* Upgrade packaging to 15.3.

  * Normalize post-release spellings for rev/r prefixes.

* Upgrade distlib to 0.2.1.

  * Updated launchers to decode shebangs using UTF-8. This allows non-ASCII
    pathnames to be correctly handled.

  * Ensured that the executable written to shebangs is normcased.

  * Changed ScriptMaker to work better under Jython.

* Upgrade ipaddress to 1.0.13.

Released v7.1.0

* Allow constraining versions globally without having to know exactly what will
  be installed by the pip command. :issue:`2731`.

* Accept --no-binary and --only-binary via pip.conf. :issue`2867`.

* Allow ``--allow-all-external`` within a requirements file.

* Fixed an issue where ``--user`` could not be used when ``--prefix`` was used
  in a distutils configuration file.

* Fixed an issue where the SOABI tags were not correctly being generated on
  Python 3.5.

* Fixed an issue where we were advising windows users to upgrade by directly
  executing pip, when that would always fail on Windows.

* Allow ``~`` to be expanded within a cache directory in all situations.

Released v7.0.3

* Fixed a regression where ``--no-cache-dir`` would raise an exception, fixes
  :issue:`2855`.

Released v7.0.2

* **BACKWARD INCOMPATIBLE** Revert the change (released in v7.0.0) that
  required quoting in requirements files around specifiers containing
  environment markers. (:pull:`2841`)

* **BACKWARD INCOMPATIBLE** Revert the accidental introduction of support for
  options interleaved with requirements, version specifiers etc in
  ``requirements`` files. (:pull:`2841`)

* Expand ``~`` in the cache directory when caching wheels, fixes :issue:`2816`.

* Use ``python -m pip`` instead of ``pip`` when recommending an upgrade command
  to Windows users.

Released v7.0.1

* Don't build and cache wheels for non-editable installations from VCSs.
* Allow ``--allow-all-external`` inside of a requirements.txt file, fixing a
  regression in 7.0.

Released v7.0.0

* **BACKWARD INCOMPATIBLE** Removed the deprecated ``--mirror``,
  ``--use-mirrors``, and ``-M`` options.

* **BACKWARD INCOMPATIBLE** Removed the deprecated ``zip`` and ``unzip``
  commands.

* **BACKWARD INCOMPATIBLE** Removed the deprecated ``--no-install`` and
  ``--no-download`` options.

* **BACKWARD INCOMPATIBLE** No longer implicitly support an insecure origin
  origin, and instead require insecure origins be explicitly trusted with the
  ``--trusted-host`` option.

* **BACKWARD INCOMPATIBLE** Removed the deprecated link scraping that attempted
  to parse HTML comments for a specially formatted comment.

* **BACKWARD INCOMPATIBLE** Requirements in requirements files containing
  markers must now be quoted due to parser changes from (:pull:`2697`) and
  (:pull:`2725`).  For example, use ``"SomeProject; python_version < '2.7'"``,
  not simply ``SomeProject; python_version < '2.7'``

* Ignores bz2 archives if Python wasn't compiled with bz2 support.
  Fixes :issue:`497`

* Support ``--install-option`` and ``--global-option`` per requirement in
  requirement files (:pull:`2537`)

* Build Wheels prior to installing from sdist, caching them in the pip cache
  directory to speed up subsequent installs. (:pull:`2618`)

* Allow fine grained control over the use of wheels and source builds.
  (:pull:`2699`)

* ``--no-use-wheel`` and ``--use-wheel`` are deprecated in favour of new
  options ``--no-binary`` and ``--only-binary``. The equivalent of
  ``--no-use-wheel`` is ``--no-binary=:all:``. (:pull:`2699`)

* The use of ``--install-option``, ``--global-option`` or ``--build-option``
  disable the use of wheels, and the autobuilding of wheels. (:pull:`2711`)
  Fixes :issue:`2677`

* Improve logging when a requirement marker doesn't match your environment
  (:pull:`2735`)

* Removed the temporary modifications (that began in pip v1.4 when distribute
  and setuptools merged) that allowed distribute to be considered a conflict to
  setuptools. ``pip install -U setuptools`` will no longer upgrade "distribute"
  to "setuptools".  Instead, use ``pip install -U distribute`` (:pull:`2767`).

* Only display a warning to upgrade pip when the newest version is a final
  release and it is not a post release of the version we already have
  installed (:pull:`2766`).

* Display a warning when attempting to access a repository that uses HTTPS when
  we don't have Python compiled with SSL support (:pull:`2761`).

* Allowing using extras when installing from a file path without requiring the
  use of an editable (:pull`2785`).

* Fix an infinite loop when the cache directory is stored on a file system
  which does not support hard links (:pull:`2796`).

* Remove the implicit debug log that was written on every invocation, instead
  users will need to use ``--log`` if they wish to have one (:pull:`2798`).

Released v6.1.1

* No longer ignore dependencies which have been added to the standard library,
  instead continue to install them.

Released v6.1.0

* Fixes :issue:`2502`. Upgrades were failing when no potential links were found
  for dependencies other than the current installation. (:pull:`2538`)

* Use a smoother progress bar when the terminal is capable of handling it,
  otherwise fallback to the original ASCII based progress bar.

* Display much less output when `pip install` succeeds, because on success,
  users probably don't care about all the nitty gritty details of compiling and
  installing. When `pip install` fails, display the failed install output once
  instead of twice, because once is enough. (:pull:`2487`)

* Upgrade the bundled copy of requests to 2.6.0, fixing CVE-2015-2296.

* Display format of latest package when using ``pip list --outdated``.
  (:pull:`2475`)

* Don't use pywin32 as ctypes should always be available on Windows, using
  pywin32 prevented uninstallation of pywin32 on Windows. (:pull:`2467`)

* Normalize the ``--wheel-dir`` option, expanding out constructs such as ``~``
  when used (:pull:`2441`).

* Display a warning when an undefined extra has been requested. (:pull:`2142`)

* Speed up installing a directory in certain cases by creating a sdist instead
  of copying the entire directory. (:pull:`2535`)

* Don't follow symlinks when uninstalling files (:pull:`2552`)

* Upgrade the bundled copy of cachecontrol from 0.11.1 to 0.11.2.
  Fixes :issue:`2481` (:pull:`2595`)

* Attempt to more smartly choose the order of installation to try and install
  dependencies before the projects that depend on them. (:pull:`2616`)

* Skip trying to install libraries which are part of the standard library.
  (:pull:`2636`, :pull:`2602`)

* Support arch specific wheels that are not tied to a specific Python ABI.
  (:pull:`2561`)

* Output warnings and errors to stderr instead of stdout. (:pull:`2543`)

* Adjust the cache dir file checks to only check ownership if the effective
  user is root. (:pull:`2396`)

* Install headers into a per project name directory instead of all of them into
  the root directory when inside of a virtual environment. (:pull:`2421`)

Released 6.0.8

* Fix an issue where the ``--download`` flag would cause pip to no longer use
  randomized build directories.

* Fix an issue where pip did not properly unquote quoted URLs which contain
  characters like PEP 440's epoch separator (``!``).

* Fix an issue where distutils installed projects were not actually uninstalled
  and deprecate attempting to uninstall them altogether.

* Retry deleting directories incase a process like an antivirus is holding the
  directory open temporarily.

* Fix an issue where pip would hide the cursor on Windows but would not reshow
  it.

Released v6.0.7

* Fix a regression where Numpy requires a build path without symlinks to
  properly build.

* Fix a broken log message when running ``pip wheel`` without a requirement.

* Don't mask network errors while downloading the file as a hash failure.

* Properly create the state file for the pip version check so it only happens
  once a week.

* Fix an issue where switching between Python 3 and Python 2 would evict cached
  items.

* Fix a regression where pip would be unable to successfully uninstall a
  project without a normalized version.

Released v6.0.6

* Continue the regression fix from 6.0.5 which was not a complete fix.

Released v6.0.5

* Fix a regression with 6.0.4 under Windows where most commands would raise an
  exception due to Windows not having the ``os.geteuid()`` function.

Released pip v6.0.4

* Fix an issue where ANSI escape codes would be used on Windows even though the
  Windows shell does not support them, causing odd characters to appear with
  the progress bar.

* Fix an issue where using -v would cause an exception saying
  ``TypeError: not all arguments converted during string formatting``.

* Fix an issue where using -v with dependency links would cause an exception
  saying ``TypeError: 'InstallationCandidate' object is not iterable``.

* Fix an issue where upgrading distribute would cause an exception saying
  ``TypeError: expected string or buffer``.

* Show a warning and disable the use of the cache directory when the cache
  directory is not owned by the current use, commonly caused by using ``sudo``
  without the ``-H`` flag.

* Update PEP 440 support to handle the latest changes to PEP 440, particularly
  the changes to ``>V`` and ``<V`` so that they no longer imply ``!=V.*``.

* Document the default cache directories for each operating system.

* Create the cache directory when the pip version check needs to save to it
  instead of silently logging an error.

* Fix a regression where the ``-q`` flag would not properly suppress the
  display of the progress bars.

Released 6.0.3

Released 6.0.2