Merge branch 'master' into license-fix-357

63 files changed, 1935 insertions, 573 deletions

diff --git a/.mergify.yml b/.mergify.yml
new file mode 100644
index 00000000..7f0df535
--- /dev/null
+++ b/.mergify.yml
@@ -0,0 +1,11 @@
+pull_request_rules:
+- name: auto-merge
+  conditions:
+  - base=master
+  - label=auto-merge
+  - status-success=continuous-integration/appveyor/pr
+  - status-success=continuous-integration/travis-ci/pr
+  - status-success=deploy/netlify
+  actions:
+    merge:
+      method: merge
diff --git a/.travis.yml b/.travis.yml
index 0e53bd29..d1febccb 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -30,7 +30,9 @@ jobs:
     install: skip
     script: skip
     after_success: true
-    before_deploy: python bootstrap.py
+    before_deploy:
+      - python bootstrap.py
+      - "! grep pyc setuptools.egg-info/SOURCES.txt"
     deploy:
       provider: pypi
       on:
@@ -58,6 +60,7 @@ install:
 
 # update egg_info based on setup.py in checkout
 - python bootstrap.py
+- "! grep pyc setuptools.egg-info/SOURCES.txt"
 
 script:
   - |
diff --git a/CHANGES.rst b/CHANGES.rst
index ca07119d..ca7122e9 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -1,3 +1,51 @@
+v40.7.0
+-------
+
+* #1551: File inputs for the `license` field in `setup.cfg` files now explicitly raise an error.
+* #1180: Add support for non-ASCII in setup.cfg (#1062). Add support for native strings on some parameters (#1136).
+* #1499: ``setuptools.package_index`` no longer relies on the deprecated ``urllib.parse.splituser`` per Python #27485.
+* #1544: Added tests for PackageIndex.download (for git URLs).
+* #1625: In PEP 517 build_meta builder, ensure that sdists are built as gztar per the spec.
+
+
+v40.6.3
+-------
+
+* #1594: PEP 517 backend no longer declares setuptools as a dependency as it can be assumed.
+
+
+v40.6.2
+-------
+
+* #1592: Fix invalid dependency on external six module (instead of vendored version).
+
+
+v40.6.1
+-------
+
+* #1590: Fixed regression where packages without ``author`` or ``author_email`` fields generated malformed package metadata.
+
+
+v40.6.0
+-------
+
+* #1541: Officially deprecated the ``requires`` parameter in ``setup()``.
+* #1519: In ``pkg_resources.normalize_path``, additional path normalization is now performed to ensure path values to a directory is always the same, preventing false positives when checking scripts have a consistent prefix to set up on Windows.
+* #1545: Changed the warning class of all deprecation warnings; deprecation warning classes are no longer derived from ``DeprecationWarning`` and are thus visible by default.
+* #1554: ``build_meta.build_sdist`` now includes ``setup.py`` in source distributions by default.
+* #1576: Started monkey-patching ``get_metadata_version`` and ``read_pkg_file`` onto ``distutils.DistributionMetadata`` to retain the correct version on the ``PKG-INFO`` file in the (deprecated) ``upload`` command.
+* #1533: Restricted the ``recursive-include setuptools/_vendor`` to contain only .py and .txt files.
+* #1395: Changed Pyrex references to Cython in the documentation.
+* #1456: Documented that the ``rpmbuild`` packages is required for the ``bdist_rpm`` command.
+* #1537: Documented how to use ``setup.cfg`` for ``src/ layouts``
+* #1539: Added minimum version column in ``setup.cfg`` metadata table.
+* #1552: Fixed a minor typo in the python 2/3 compatibility documentation.
+* #1553: Updated installation instructions to point to ``pip install`` instead of ``ez_setup.py``.
+* #1560: Updated ``setuptools`` distribution documentation to remove some outdated information.
+* #1564: Documented ``setup.cfg`` minimum version for version and project_urls.
+* #1572: Added the ``concurrent.futures`` backport ``futures`` to the Python 2.7 test suite requirements.
+
+
 v40.5.0
 -------
 
diff --git a/MANIFEST.in b/MANIFEST.in
index 325bbed8..9cce3c90 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -2,7 +2,7 @@ recursive-include setuptools *.py *.exe *.xml
 recursive-include tests *.py
 recursive-include setuptools/tests *.html
 recursive-include docs *.py *.txt *.conf *.css *.css_t Makefile indexsidebar.html
-recursive-include setuptools/_vendor *
+recursive-include setuptools/_vendor *.py *.txt
 recursive-include pkg_resources *.py *.txt
 include *.py
 include *.rst
diff --git a/README.rst b/README.rst
index a9bed521..0454f2ed 100644
--- a/README.rst
+++ b/README.rst
@@ -23,10 +23,6 @@ See the `Installation Instructions
 User's Guide for instructions on installing, upgrading, and uninstalling
 Setuptools.
 
-The project is `maintained at GitHub <https://github.com/pypa/setuptools>`_
-by the `Setuptools Developers
-<https://github.com/orgs/pypa/teams/setuptools-developers>`_.
-
 Questions and comments should be directed to the `distutils-sig
 mailing list <http://mail.python.org/pipermail/distutils-sig/>`_.
 Bug reports and especially tested patches may be
diff --git a/docs/_templates/indexsidebar.html b/docs/_templates/indexsidebar.html
index 80002d08..504de6b0 100644
--- a/docs/_templates/indexsidebar.html
+++ b/docs/_templates/indexsidebar.html
@@ -5,4 +5,11 @@
 
 <h3>Questions? Suggestions? Contributions?</h3>
 
-<p>Visit the <a href="https://github.com/pypa/setuptools">Setuptools project page</a> </p>
+<p>Visit the <a href="{{ package_url }}">Project page</a> </p>
+
+<h3 class="donation">Professional support</h3>
+
+<p>
+Professionally-supported {{ project }} is available with the
+<a href="https://tidelift.com/subscription/pkg/pypi-{{ project }}?utm_source=pypi-{{ project }}&utm_medium=readme">Tidelift Subscription</a>.
+</p>
diff --git a/docs/developer-guide.txt b/docs/developer-guide.txt
index c011491a..a5942c8b 100644
--- a/docs/developer-guide.txt
+++ b/docs/developer-guide.txt
@@ -67,8 +67,8 @@ All PRs with code changes should include tests. All changes should include a
 changelog entry.
 
 ``setuptools`` uses `towncrier <https://pypi.org/project/towncrier/>`_
-for changelog managment, so when making a PR, please add a news fragment in the
-``changelog.d/`` folder. Changelog files are written in Restructured Text and
+for changelog management, so when making a PR, please add a news fragment in the
+``changelog.d/`` folder. Changelog files are written in reStructuredText and
 should be a 1 or 2 sentence description of the substantive changes in the PR.
 They should be named ``<pr_number>.<category>.rst``, where the categories are:
 
@@ -76,7 +76,7 @@ They should be named ``<pr_number>.<category>.rst``, where the categories are:
 - ``breaking``: Any backwards-compatibility breaking change
 - ``doc``: A change to the documentation
 - ``misc``: Changes internal to the repo like CI, test and build changes
-- ``deprecation``: For deprecations of an existing feature of behavior
+- ``deprecation``: For deprecations of an existing feature or behavior
 
 A pull request may have more than one of these components, for example a code
 change may introduce a new feature that deprecates an old feature, in which
@@ -89,6 +89,17 @@ code changes. See the following for an example news fragment:
     $ cat changelog.d/1288.change.rst
     Add support for maintainer in PKG-INFO
 
+-------------------
+Auto-Merge Requests
+-------------------
+
+To support running all code through CI, even lightweight contributions,
+the project employs Mergify to auto-merge pull requests tagged as
+auto-merge.
+
+Use ``hub pull-request -l auto-merge`` to create such a pull request
+from the command line after pushing a new branch.
+
 -------
 Testing
 -------
diff --git a/docs/ez_setup.txt b/docs/ez_setup.txt
new file mode 100644
index 00000000..0126fee3
--- /dev/null
+++ b/docs/ez_setup.txt
@@ -0,0 +1,195 @@
+:orphan:
+
+``ez_setup`` distribution guide 
+===============================
+
+Using ``setuptools``...  Without bundling it!
+---------------------------------------------
+
+.. warning:: **ez_setup** is deprecated in favor of PIP with **PEP-518** support.
+
+.. _ez_setup.py: https://bootstrap.pypa.io/ez_setup.py
+
+.. _EasyInstall Installation Instructions: easy_install.html
+
+.. _Custom Installation Locations: easy_install.html
+
+Your users might not have ``setuptools`` installed on their machines, or even
+if they do, it might not be the right version.  Fixing this is easy; just
+download `ez_setup.py`_, and put it in the same directory as your ``setup.py``
+script.  (Be sure to add it to your revision control system, too.)  Then add
+these two lines to the very top of your setup script, before the script imports
+anything from setuptools:
+
+.. code-block:: python
+
+    import ez_setup
+    ez_setup.use_setuptools()
+
+That's it.  The ``ez_setup`` module will automatically download a matching
+version of ``setuptools`` from PyPI, if it isn't present on the target system.
+Whenever you install an updated version of setuptools, you should also update
+your projects' ``ez_setup.py`` files, so that a matching version gets installed
+on the target machine(s).
+
+(By the way, if you need to distribute a specific version of ``setuptools``,
+you can specify the exact version and base download URL as parameters to the
+``use_setuptools()`` function.  See the function's docstring for details.)
+
+
+What Your Users Should Know
+---------------------------
+
+In general, a setuptools-based project looks just like any distutils-based
+project -- as long as your users have an internet connection and are installing
+to ``site-packages``, that is.  But for some users, these conditions don't
+apply, and they may become frustrated if this is their first encounter with
+a setuptools-based project.  To keep these users happy, you should review the
+following topics in your project's installation instructions, if they are
+relevant to your project and your target audience isn't already familiar with
+setuptools and ``easy_install``.
+
+Network Access
+    If your project is using ``ez_setup``, you should inform users of the
+    need to either have network access, or to preinstall the correct version of
+    setuptools using the `EasyInstall installation instructions`_.  Those
+    instructions also have tips for dealing with firewalls as well as how to
+    manually download and install setuptools.
+
+Custom Installation Locations
+    You should inform your users that if they are installing your project to
+    somewhere other than the main ``site-packages`` directory, they should
+    first install setuptools using the instructions for `Custom Installation
+    Locations`_, before installing your project.
+
+Your Project's Dependencies
+    If your project depends on other projects that may need to be downloaded
+    from PyPI or elsewhere, you should list them in your installation
+    instructions, or tell users how to find out what they are.  While most
+    users will not need this information, any users who don't have unrestricted
+    internet access may have to find, download, and install the other projects
+    manually.  (Note, however, that they must still install those projects
+    using ``easy_install``, or your project will not know they are installed,
+    and your setup script will try to download them again.)
+
+    If you want to be especially friendly to users with limited network access,
+    you may wish to build eggs for your project and its dependencies, making
+    them all available for download from your site, or at least create a page
+    with links to all of the needed eggs.  In this way, users with limited
+    network access can manually download all the eggs to a single directory,
+    then use the ``-f`` option of ``easy_install`` to specify the directory
+    to find eggs in.  Users who have full network access can just use ``-f``
+    with the URL of your download page, and ``easy_install`` will find all the
+    needed eggs using your links directly.  This is also useful when your
+    target audience isn't able to compile packages (e.g. most Windows users)
+    and your package or some of its dependencies include C code.
+
+Revision Control System Users and Co-Developers
+    Users and co-developers who are tracking your in-development code using
+    a revision control system should probably read this manual's sections
+    regarding such development.  Alternately, you may wish to create a
+    quick-reference guide containing the tips from this manual that apply to
+    your particular situation.  For example, if you recommend that people use
+    ``setup.py develop`` when tracking your in-development code, you should let
+    them know that this needs to be run after every update or commit.
+
+    Similarly, if you remove modules or data files from your project, you
+    should remind them to run ``setup.py clean --all`` and delete any obsolete
+    ``.pyc`` or ``.pyo``.  (This tip applies to the distutils in general, not
+    just setuptools, but not everybody knows about them; be kind to your users
+    by spelling out your project's best practices rather than leaving them
+    guessing.)
+
+Creating System Packages
+    Some users want to manage all Python packages using a single package
+    manager, and sometimes that package manager isn't ``easy_install``!
+    Setuptools currently supports ``bdist_rpm``, ``bdist_wininst``, and
+    ``bdist_dumb`` formats for system packaging.  If a user has a locally-
+    installed "bdist" packaging tool that internally uses the distutils
+    ``install`` command, it should be able to work with ``setuptools``.  Some
+    examples of "bdist" formats that this should work with include the
+    ``bdist_nsi`` and ``bdist_msi`` formats for Windows.
+
+    However, packaging tools that build binary distributions by running
+    ``setup.py install`` on the command line or as a subprocess will require
+    modification to work with setuptools.  They should use the
+    ``--single-version-externally-managed`` option to the ``install`` command,
+    combined with the standard ``--root`` or ``--record`` options.
+    See the `install command`_ documentation below for more details.  The
+    ``bdist_deb`` command is an example of a command that currently requires
+    this kind of patching to work with setuptools.
+
+    Please note that building system packages may require you to install
+    some system software, for example ``bdist_rpm`` requires the ``rpmbuild``
+    command to be installed.
+
+    If you or your users have a problem building a usable system package for
+    your project, please report the problem via the mailing list so that
+    either the "bdist" tool in question or setuptools can be modified to
+    resolve the issue.
+
+Your users might not have ``setuptools`` installed on their machines, or even
+if they do, it might not be the right version.  Fixing this is easy; just
+download `ez_setup.py`_, and put it in the same directory as your ``setup.py``
+script.  (Be sure to add it to your revision control system, too.)  Then add
+these two lines to the very top of your setup script, before the script imports
+anything from setuptools:
+
+.. code-block:: python
+
+    import ez_setup
+    ez_setup.use_setuptools()
+
+That's it.  The ``ez_setup`` module will automatically download a matching
+version of ``setuptools`` from PyPI, if it isn't present on the target system.
+Whenever you install an updated version of setuptools, you should also update
+your projects' ``ez_setup.py`` files, so that a matching version gets installed
+on the target machine(s).
+
+(By the way, if you need to distribute a specific version of ``setuptools``,
+you can specify the exact version and base download URL as parameters to the
+``use_setuptools()`` function.  See the function's docstring for details.)
+
+.. _install command:
+
+``install`` - Run ``easy_install`` or old-style installation
+============================================================
+
+The setuptools ``install`` command is basically a shortcut to run the
+``easy_install`` command on the current project.  However, for convenience
+in creating "system packages" of setuptools-based projects, you can also
+use this option:
+
+``--single-version-externally-managed``
+    This boolean option tells the ``install`` command to perform an "old style"
+    installation, with the addition of an ``.egg-info`` directory so that the
+    installed project will still have its metadata available and operate
+    normally.  If you use this option, you *must* also specify the ``--root``
+    or ``--record`` options (or both), because otherwise you will have no way
+    to identify and remove the installed files.
+
+This option is automatically in effect when ``install`` is invoked by another
+distutils command, so that commands like ``bdist_wininst`` and ``bdist_rpm``
+will create system packages of eggs.  It is also automatically in effect if
+you specify the ``--root`` option.
+
+
+``install_egg_info`` - Install an ``.egg-info`` directory in ``site-packages``
+==============================================================================
+
+Setuptools runs this command as part of ``install`` operations that use the
+``--single-version-externally-managed`` options.  You should not invoke it
+directly; it is documented here for completeness and so that distutils
+extensions such as system package builders can make use of it.  This command
+has only one option:
+
+``--install-dir=DIR, -d DIR``
+    The parent directory where the ``.egg-info`` directory will be placed.
+    Defaults to the same as the ``--install-dir`` option specified for the
+    ``install_lib`` command, which is usually the system ``site-packages``
+    directory.
+
+This command assumes that the ``egg_info`` command has been given valid options
+via the command line or ``setup.cfg``, as it will invoke the ``egg_info``
+command and use its options to locate the project's source ``.egg-info``
+directory.
diff --git a/docs/index.txt b/docs/index.txt
index 74aabb5e..13a46e74 100644
--- a/docs/index.txt
+++ b/docs/index.txt
@@ -17,9 +17,9 @@ Documentation content:
    :maxdepth: 2
 
    setuptools
-   easy_install
    pkg_resources
    python3
    development
    roadmap
+   Deprecated: Easy Install <easy_install>
    history
diff --git a/docs/python3.txt b/docs/python3.txt
index c528fc3c..6b55fe78 100644
--- a/docs/python3.txt
+++ b/docs/python3.txt
@@ -9,7 +9,7 @@ code.
 
 Setuptools provides a facility to invoke 2to3 on the code as a part of the
 build process, by setting the keyword parameter ``use_2to3`` to True, but
-the Setuptools strongly recommends instead developing a unified codebase
+the Setuptools project strongly recommends instead developing a unified codebase
 using `six <https://pypi.org/project/six/>`_,
 `future <https://pypi.org/project/future/>`_, or another compatibility
 library.
diff --git a/docs/requirements.txt b/docs/requirements.txt
index c6d594e8..bc27165b 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -1,5 +1,5 @@
 sphinx!=1.8.0
 rst.linker>=1.9
-jaraco.packaging>=3.2
+jaraco.packaging>=6.1
 
 setuptools>=34
diff --git a/docs/roadmap.txt b/docs/roadmap.txt
index d5a127e8..147288f3 100644
--- a/docs/roadmap.txt
+++ b/docs/roadmap.txt
@@ -2,11 +2,6 @@
 Roadmap
 =======
 
-Setuptools has the following large-scale goals on the roadmap:
-
-- Mature declarative config to supersede imperative config in
-  all supported use-cases and harmonize with pyproject.toml
-  syntax.
-- Deprecate and remove setup_requires and easy_install in
-  favor of PEP 518 build requirements and pip install.
-- Adopt the Distutils package and stop monkeypatching stdlib.
+Setuptools maintains a series of `milestones
+<https://github.com/pypa/setuptools/milestones>`_ to track
+a roadmap of large-scale goals.
diff --git a/docs/setuptools.txt b/docs/setuptools.txt
index 436f207d..a4e05d75 100644
--- a/docs/setuptools.txt
+++ b/docs/setuptools.txt
@@ -41,9 +41,9 @@ Feature Highlights:
   files for any number of "main" functions in your project.  (Note: this is not
   a py2exe replacement; the .exe files rely on the local Python installation.)
 
-* Transparent Pyrex support, so that your setup.py can list ``.pyx`` files and
-  still work even when the end-user doesn't have Pyrex installed (as long as
-  you include the Pyrex-generated C in your source distribution)
+* Transparent Cython support, so that your setup.py can list ``.pyx`` files and
+  still work even when the end-user doesn't have Cython installed (as long as
+  you include the Cython-generated C in your source distribution)
 
 * Command aliases - create project-specific, per-user, or site-wide shortcut
   names for commonly used commands and options
@@ -73,23 +73,17 @@ Developer's Guide
 Installing ``setuptools``
 =========================
 
-Please follow the `EasyInstall Installation Instructions`_ to install the
-current stable version of setuptools.  In particular, be sure to read the
-section on `Custom Installation Locations`_ if you are installing anywhere
-other than Python's ``site-packages`` directory.
+.. _EasyInstall Installation Instructions: easy_install.html
 
-.. _EasyInstall Installation Instructions: easy_install.html#installation-instructions
+.. _Custom Installation Locations: easy_install.html
 
-.. _Custom Installation Locations: easy_install.html#custom-installation-locations
+.. _Installing Packages: https://packaging.python.org/tutorials/installing-packages/
 
-If you want the current in-development version of setuptools, you should first
-install a stable version, and then run::
+To install the latest version of setuptools, use::
 
-    ez_setup.py setuptools==dev
-
-This will download and install the latest development (i.e. unstable) version
-of setuptools from the Python Subversion sandbox.
+    pip install -U setuptools
 
+Refer to `Installing Packages`_ guide for more information.
 
 Basic Use
 =========
@@ -1229,121 +1223,53 @@ the quoted part.
 Distributing a ``setuptools``-based project
 ===========================================
 
-Using ``setuptools``...  Without bundling it!
----------------------------------------------
+Detailed instructions to distribute a setuptools project can be found at 
+`Packaging project tutorials`_.
 
-.. warning:: **ez_setup** is deprecated in favor of PIP with **PEP-518** support.
+.. _Packaging project tutorials: https://packaging.python.org/tutorials/packaging-projects/#generating-distribution-archives
 
-Your users might not have ``setuptools`` installed on their machines, or even
-if they do, it might not be the right version.  Fixing this is easy; just
-download `ez_setup.py`_, and put it in the same directory as your ``setup.py``
-script.  (Be sure to add it to your revision control system, too.)  Then add
-these two lines to the very top of your setup script, before the script imports
-anything from setuptools:
+Before you begin, make sure you have the latest versions of setuptools and wheel::
 
-.. code-block:: python
+    python3 -m pip install --user --upgrade setuptools wheel
 
-    import ez_setup
-    ez_setup.use_setuptools()
+To build a setuptools project, run this command from the same directory where
+setup.py is located::
 
-That's it.  The ``ez_setup`` module will automatically download a matching
-version of ``setuptools`` from PyPI, if it isn't present on the target system.
-Whenever you install an updated version of setuptools, you should also update
-your projects' ``ez_setup.py`` files, so that a matching version gets installed
-on the target machine(s).
+    python3 setup.py sdist bdist_wheel
 
-(By the way, if you need to distribute a specific version of ``setuptools``,
-you can specify the exact version and base download URL as parameters to the
-``use_setuptools()`` function.  See the function's docstring for details.)
+This will generate distribution archives in the `dist` directory.
 
+Before you upload the generated archives make sure you're registered on 
+https://test.pypi.org/account/register/. You will also need to verify your email
+to be able to upload any packages.
+You should install twine to be able to upload packages::
 
-What Your Users Should Know
----------------------------
+    python3 -m pip install --user --upgrade setuptools wheel
+
+Now, to upload these archives, run::
+
+    twine upload --repository-url https://test.pypi.org/legacy/ dist/*
+
+To install your newly uploaded package ``example_pkg``,  you can use pip::
+
+    python3 -m pip install --index-url https://test.pypi.org/simple/ example_pkg
+
+If you have issues at any point, please refer to `Packaging project tutorials`_
+for clarification.
+
+Distributing legacy ``setuptools`` projects using ez_setup.py
+-------------------------------------------------------------
+
+.. warning:: **ez_setup** is deprecated in favor of PIP with **PEP-518** support.
+
+Distributing packages using the legacy ``ez_setup.py`` and ``easy_install`` is 
+deprecated in favor of PIP. Please consider migrating to using pip and twine based
+distribution.
 
-In general, a setuptools-based project looks just like any distutils-based
-project -- as long as your users have an internet connection and are installing
-to ``site-packages``, that is.  But for some users, these conditions don't
-apply, and they may become frustrated if this is their first encounter with
-a setuptools-based project.  To keep these users happy, you should review the
-following topics in your project's installation instructions, if they are
-relevant to your project and your target audience isn't already familiar with
-setuptools and ``easy_install``.
-
-Network Access
-    If your project is using ``ez_setup``, you should inform users of the
-    need to either have network access, or to preinstall the correct version of
-    setuptools using the `EasyInstall installation instructions`_.  Those
-    instructions also have tips for dealing with firewalls as well as how to
-    manually download and install setuptools.
-
-Custom Installation Locations
-    You should inform your users that if they are installing your project to
-    somewhere other than the main ``site-packages`` directory, they should
-    first install setuptools using the instructions for `Custom Installation
-    Locations`_, before installing your project.
-
-Your Project's Dependencies
-    If your project depends on other projects that may need to be downloaded
-    from PyPI or elsewhere, you should list them in your installation
-    instructions, or tell users how to find out what they are.  While most
-    users will not need this information, any users who don't have unrestricted
-    internet access may have to find, download, and install the other projects
-    manually.  (Note, however, that they must still install those projects
-    using ``easy_install``, or your project will not know they are installed,
-    and your setup script will try to download them again.)
-
-    If you want to be especially friendly to users with limited network access,
-    you may wish to build eggs for your project and its dependencies, making
-    them all available for download from your site, or at least create a page
-    with links to all of the needed eggs.  In this way, users with limited
-    network access can manually download all the eggs to a single directory,
-    then use the ``-f`` option of ``easy_install`` to specify the directory
-    to find eggs in.  Users who have full network access can just use ``-f``
-    with the URL of your download page, and ``easy_install`` will find all the
-    needed eggs using your links directly.  This is also useful when your
-    target audience isn't able to compile packages (e.g. most Windows users)
-    and your package or some of its dependencies include C code.
-
-Revision Control System Users and Co-Developers
-    Users and co-developers who are tracking your in-development code using
-    a revision control system should probably read this manual's sections
-    regarding such development.  Alternately, you may wish to create a
-    quick-reference guide containing the tips from this manual that apply to
-    your particular situation.  For example, if you recommend that people use
-    ``setup.py develop`` when tracking your in-development code, you should let
-    them know that this needs to be run after every update or commit.
-
-    Similarly, if you remove modules or data files from your project, you
-    should remind them to run ``setup.py clean --all`` and delete any obsolete
-    ``.pyc`` or ``.pyo``.  (This tip applies to the distutils in general, not
-    just setuptools, but not everybody knows about them; be kind to your users
-    by spelling out your project's best practices rather than leaving them
-    guessing.)
-
-Creating System Packages
-    Some users want to manage all Python packages using a single package
-    manager, and sometimes that package manager isn't ``easy_install``!
-    Setuptools currently supports ``bdist_rpm``, ``bdist_wininst``, and
-    ``bdist_dumb`` formats for system packaging.  If a user has a locally-
-    installed "bdist" packaging tool that internally uses the distutils
-    ``install`` command, it should be able to work with ``setuptools``.  Some
-    examples of "bdist" formats that this should work with include the
-    ``bdist_nsi`` and ``bdist_msi`` formats for Windows.
-
-    However, packaging tools that build binary distributions by running
-    ``setup.py install`` on the command line or as a subprocess will require
-    modification to work with setuptools.  They should use the
-    ``--single-version-externally-managed`` option to the ``install`` command,
-    combined with the standard ``--root`` or ``--record`` options.
-    See the `install command`_ documentation below for more details.  The
-    ``bdist_deb`` command is an example of a command that currently requires
-    this kind of patching to work with setuptools.
-
-    If you or your users have a problem building a usable system package for
-    your project, please report the problem via the mailing list so that
-    either the "bdist" tool in question or setuptools can be modified to
-    resolve the issue.
+However, if you still have any ``ez_setup`` based packages, documentation for 
+ez_setup based distributions can be found at `ez_setup distribution guide`_.
 
+.. _ez_setup distribution guide: ez_setup.html
 
 Setting the ``zip_safe`` flag
 -----------------------------
@@ -1651,29 +1577,43 @@ See the sections below on the `egg_info`_ and `alias`_ commands for more ideas.
 
 
 
-Distributing Extensions compiled with Pyrex
--------------------------------------------
+Distributing Extensions compiled with Cython
+--------------------------------------------
 
-``setuptools`` includes transparent support for building Pyrex extensions, as
-long as you define your extensions using ``setuptools.Extension``, *not*
-``distutils.Extension``.  You must also not import anything from Pyrex in
-your setup script.
+``setuptools`` will detect at build time whether Cython is installed or not.
+If Cython is not found ``setuptools`` will ignore pyx files.
+
+To ensure Cython is available, include Cython in the build-requires section
+of your pyproject.toml::
+
+    [build-system]
+    requires=[..., 'cython']
+
+Built with pip 10 or later, that declaration is sufficient to include Cython
+in the build. For broader compatibility, declare the dependency in your
+setup-requires of setup.cfg::
+
+    [options]
+    setup_requires =
+        ...
+        cython
+
+As long as Cython is present in the build environment, ``setuptools`` includes
+transparent support for building Cython extensions, as
+long as extensions are defined using ``setuptools.Extension``.
 
 If you follow these rules, you can safely list ``.pyx`` files as the source
-of your ``Extension`` objects in the setup script.  ``setuptools`` will detect
-at build time whether Pyrex is installed or not.  If it is, then ``setuptools``
-will use it.  If not, then ``setuptools`` will silently change the
-``Extension`` objects to refer to the ``.c`` counterparts of the ``.pyx``
-files, so that the normal distutils C compilation process will occur.
+of your ``Extension`` objects in the setup script.  If it is, then ``setuptools``
+will use it.
 
 Of course, for this to work, your source distributions must include the C
-code generated by Pyrex, as well as your original ``.pyx`` files.  This means
+code generated by Cython, as well as your original ``.pyx`` files.  This means
 that you will probably want to include current ``.c`` files in your revision
 control system, rebuilding them whenever you check changes in for the ``.pyx``
 source files.  This will ensure that people tracking your project in a revision
-control system will be able to build it even if they don't have Pyrex
+control system will be able to build it even if they don't have Cython
 installed, and that your source releases will be similarly usable with or
-without Pyrex.
+without Cython.
 
 
 -----------------
@@ -2046,52 +1986,6 @@ specified in ``setup.cfg``::
 (Notice that ``egg_info`` must always appear on the command line *before* any
 commands that you want the version changes to apply to.)
 
-
-.. _install command:
-
-``install`` - Run ``easy_install`` or old-style installation
-============================================================
-
-The setuptools ``install`` command is basically a shortcut to run the
-``easy_install`` command on the current project.  However, for convenience
-in creating "system packages" of setuptools-based projects, you can also
-use this option:
-
-``--single-version-externally-managed``
-    This boolean option tells the ``install`` command to perform an "old style"
-    installation, with the addition of an ``.egg-info`` directory so that the
-    installed project will still have its metadata available and operate
-    normally.  If you use this option, you *must* also specify the ``--root``
-    or ``--record`` options (or both), because otherwise you will have no way
-    to identify and remove the installed files.
-
-This option is automatically in effect when ``install`` is invoked by another
-distutils command, so that commands like ``bdist_wininst`` and ``bdist_rpm``
-will create system packages of eggs.  It is also automatically in effect if
-you specify the ``--root`` option.
-
-
-``install_egg_info`` - Install an ``.egg-info`` directory in ``site-packages``
-==============================================================================
-
-Setuptools runs this command as part of ``install`` operations that use the
-``--single-version-externally-managed`` options.  You should not invoke it
-directly; it is documented here for completeness and so that distutils
-extensions such as system package builders can make use of it.  This command
-has only one option:
-
-``--install-dir=DIR, -d DIR``
-    The parent directory where the ``.egg-info`` directory will be placed.
-    Defaults to the same as the ``--install-dir`` option specified for the
-    ``install_lib`` command, which is usually the system ``site-packages``
-    directory.
-
-This command assumes that the ``egg_info`` command has been given valid options
-via the command line or ``setup.cfg``, as it will invoke the ``egg_info``
-command and use its options to locate the project's source ``.egg-info``
-directory.
-
-
 .. _rotate:
 
 ``rotate`` - Delete outdated distribution files
@@ -2400,6 +2294,35 @@ Metadata and options are set in the config sections of the same name.
 * Unknown keys are ignored.
 
 
+Using a ``src/`` layout
+=======================
+
+One commonly used package configuration has all the module source code in a
+subdirectory (often called the ``src/`` layout), like this::
+
+    ├── src
+    │   └── mypackage
+    │       ├── __init__.py
+    │       └── mod1.py
+    ├── setup.py
+    └── setup.cfg
+
+You can set up your ``setup.cfg`` to automatically find all your packages in
+the subdirectory like this:
+
+.. code-block:: ini
+
+    # This example contains just the necessary options for a src-layout, set up
+    # the rest of the file as described above.
+
+    [options]
+    package_dir=
+        =src
+    packages=find:
+
+    [options.packages.find]
+    where=src
+
 Specifying values
 =================
 
@@ -2434,42 +2357,45 @@ Metadata
     The aliases given below are supported for compatibility reasons,
     but their use is not advised.
 
-==============================  =================  =====
-Key                             Aliases            Type
-==============================  =================  =====
+==============================  =================  =================  =============== =====
+Key                             Aliases            Type               Minimum Version Notes
+==============================  =================  =================  =============== =====
 name                                               str
-version                                            attr:, file:, str
+version                                            attr:, file:, str  39.2.0          (1)
 url                             home-page          str
 download_url                    download-url       str
-project_urls                                       dict
+project_urls                                       dict               38.3.0
 author                                             str
 author_email                    author-email       str
 maintainer                                         str
 maintainer_email                maintainer-email   str
 classifiers                     classifier         file:, list-comma
-license                                            file:, str
+license                                            str
 license_file                                       str
 description                     summary            file:, str
 long_description                long-description   file:, str
-long_description_content_type                      str
+long_description_content_type                      str                38.6.0
 keywords                                           list-comma
 platforms                       platform           list-comma
 provides                                           list-comma
 requires                                           list-comma
 obsoletes                                          list-comma
-==============================  =================  =====
+==============================  =================  =================  =============== =====
 
 .. note::
     A version loaded using the ``file:`` directive must comply with PEP 440.
     It is easy to accidentally put something other than a valid version
     string in such a file, so validation is stricter in this case.
 
+Notes:
+1. The `version` file attribute has only been supported since 39.2.0.
+
 Options
 -------
 
-=======================  =====
-Key                      Type
-=======================  =====
+=======================  ===================================  =============== =====
+Key                      Type                                 Minimum Version Notes
+=======================  ===================================  =============== =====
 zip_safe                 bool
 setup_requires           list-semi
 install_requires         list-semi
@@ -2491,7 +2417,8 @@ package_data             section
 exclude_package_data     section
 namespace_packages       list-comma
 py_modules               list-comma
-=======================  =====
+data_files               dict                                 40.6.0
+=======================  ===================================  =============== =====
 
 .. note::
 
@@ -2500,7 +2427,7 @@ py_modules               list-comma
     accepts the same keys as the `setuptools.find_packages` and the
     `setuptools.find_namespace_packages` function:
     ``where``, ``include``, and ``exclude``.
-    
+
     **find_namespace directive** - The ``find_namespace:`` directive is supported since Python >=3.3.
 
 
diff --git a/pkg_resources/__init__.py b/pkg_resources/__init__.py
index 74134701..6ca68daa 100644
--- a/pkg_resources/__init__.py
+++ b/pkg_resources/__init__.py
@@ -238,6 +238,9 @@ __all__ = [
     'register_finder', 'register_namespace_handler', 'register_loader_type',
     'fixup_namespace_packages', 'get_importer',
 
+    # Warnings
+    'PkgResourcesDeprecationWarning',
+
     # Deprecated/backward compatibility only
     'run_main', 'AvailableDistributions',
 ]
@@ -2228,7 +2231,7 @@ register_namespace_handler(object, null_ns_handler)
 
 def normalize_path(filename):
     """Normalize a file/dir name for comparison purposes"""
-    return os.path.normcase(os.path.realpath(_cygwin_patch(filename)))
+    return os.path.normcase(os.path.realpath(os.path.normpath(_cygwin_patch(filename))))
 
 
 def _cygwin_patch(filename):  # pragma: nocover
@@ -2335,7 +2338,7 @@ class EntryPoint:
             warnings.warn(
                 "Parameters to load are deprecated.  Call .resolve and "
                 ".require separately.",
-                DeprecationWarning,
+                PkgResourcesDeprecationWarning,
                 stacklevel=2,
             )
         if require:
@@ -3158,3 +3161,11 @@ def _initialize_master_working_set():
     # match order
     list(map(working_set.add_entry, sys.path))
     globals().update(locals())
+
+class PkgResourcesDeprecationWarning(Warning):
+    """
+    Base class for warning about deprecations in ``pkg_resources``
+
+    This class is not derived from ``DeprecationWarning``, and as such is
+    visible by default.
+    """
diff --git a/pkg_resources/tests/test_pkg_resources.py b/pkg_resources/tests/test_pkg_resources.py
index 62a39b8f..416f9aff 100644
--- a/pkg_resources/tests/test_pkg_resources.py
+++ b/pkg_resources/tests/test_pkg_resources.py
@@ -236,3 +236,56 @@ class TestDeepVersionLookupDistutils:
         req = pkg_resources.Requirement.parse('foo>=1.9')
         dist = pkg_resources.WorkingSet([env.paths['lib']]).find(req)
         assert dist.version == version
+
+    @pytest.mark.parametrize(
+        'unnormalized, normalized',
+        [
+            ('foo', 'foo'),
+            ('foo/', 'foo'),
+            ('foo/bar', 'foo/bar'),
+            ('foo/bar/', 'foo/bar'),
+        ],
+    )
+    def test_normalize_path_trailing_sep(self, unnormalized, normalized):
+        """Ensure the trailing slash is cleaned for path comparison.
+
+        See pypa/setuptools#1519.
+        """
+        result_from_unnormalized = pkg_resources.normalize_path(unnormalized)
+        result_from_normalized = pkg_resources.normalize_path(normalized)
+        assert result_from_unnormalized == result_from_normalized
+
+    @pytest.mark.skipif(
+        os.path.normcase('A') != os.path.normcase('a'),
+        reason='Testing case-insensitive filesystems.',
+    )
+    @pytest.mark.parametrize(
+        'unnormalized, normalized',
+        [
+            ('MiXeD/CasE', 'mixed/case'),
+        ],
+    )
+    def test_normalize_path_normcase(self, unnormalized, normalized):
+        """Ensure mixed case is normalized on case-insensitive filesystems.
+        """
+        result_from_unnormalized = pkg_resources.normalize_path(unnormalized)
+        result_from_normalized = pkg_resources.normalize_path(normalized)
+        assert result_from_unnormalized == result_from_normalized
+
+    @pytest.mark.skipif(
+        os.path.sep != '\\',
+        reason='Testing systems using backslashes as path separators.',
+    )
+    @pytest.mark.parametrize(
+        'unnormalized, expected',
+        [
+            ('forward/slash', 'forward\\slash'),
+            ('forward/slash/', 'forward\\slash'),
+            ('backward\\slash\\', 'backward\\slash'),
+        ],
+    )
+    def test_normalize_path_backslash_sep(self, unnormalized, expected):
+        """Ensure path seps are cleaned on backslash path sep systems.
+        """
+        result = pkg_resources.normalize_path(unnormalized)
+        assert result.endswith(expected)
diff --git a/pkg_resources/tests/test_resources.py b/pkg_resources/tests/test_resources.py
index 171ba2f9..86afcf74 100644
--- a/pkg_resources/tests/test_resources.py
+++ b/pkg_resources/tests/test_resources.py
@@ -15,7 +15,7 @@ import pkg_resources
 from pkg_resources import (
     parse_requirements, VersionConflict, parse_version,
     Distribution, EntryPoint, Requirement, safe_version, safe_name,
-    WorkingSet)
+    WorkingSet, PkgResourcesDeprecationWarning)
 
 
 # from Python 3.6 docs.
@@ -492,6 +492,15 @@ class TestEntryPoints:
         with pytest.raises(ValueError):
             EntryPoint.parse_map(self.submap_str)
 
+    def testDeprecationWarnings(self):
+        ep = EntryPoint(
+            "foo", "pkg_resources.tests.test_resources", ["TestEntryPoints"],
+            ["x"]
+        )
+        with pytest.warns(pkg_resources.PkgResourcesDeprecationWarning):
+            ep.load(require=False)
+
+
 
 class TestRequirements:
     def testBasics(self):
diff --git a/pyproject.toml b/pyproject.toml
index 07c23bb5..4ef804ec 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,5 +1,6 @@
 [build-system]
 requires = ["wheel"]
+build-backend = "setuptools.build_meta"
 
 [tool.towncrier]
     package = "setuptools"
diff --git a/setup.cfg b/setup.cfg
index 5f7abd39..78eb7596 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -1,5 +1,5 @@
 [bumpversion]
-current_version = 40.5.0
+current_version = 40.7.0
 commit = True
 tag = True
 
diff --git a/setup.py b/setup.py
index 2cac67a2..00db0f0a 100755
--- a/setup.py
+++ b/setup.py
@@ -89,7 +89,7 @@ def pypi_link(pkg_filename):
 
 setup_params = dict(
     name="setuptools",
-    version="40.5.0",
+    version="40.7.0",
     description=(
         "Easily download, build, install, upgrade, and uninstall "
         "Python packages"
@@ -164,6 +164,7 @@ setup_params = dict(
         Programming Language :: Python :: 3.4
         Programming Language :: Python :: 3.5
         Programming Language :: Python :: 3.6
+        Programming Language :: Python :: 3.7
         Topic :: Software Development :: Libraries :: Python Modules
         Topic :: System :: Archiving :: Packaging
         Topic :: System :: Systems Administration
diff --git a/setuptools/__init__.py b/setuptools/__init__.py
index 54309b57..a71b2bbd 100644
--- a/setuptools/__init__.py
+++ b/setuptools/__init__.py
@@ -5,10 +5,14 @@ import sys
 import functools
 import distutils.core
 import distutils.filelist
+import re
+from distutils.errors import DistutilsOptionError
 from distutils.util import convert_path
 from fnmatch import fnmatchcase
 
-from setuptools.extern.six import PY3
+from ._deprecation_warning import SetuptoolsDeprecationWarning
+
+from setuptools.extern.six import PY3, string_types
 from setuptools.extern.six.moves import filter, map
 
 import setuptools.version
@@ -22,6 +26,7 @@ __metaclass__ = type
 
 __all__ = [
     'setup', 'Distribution', 'Feature', 'Command', 'Extension', 'Require',
+    'SetuptoolsDeprecationWarning',
     'find_packages'
 ]
 
@@ -158,6 +163,37 @@ class Command(_Command):
         _Command.__init__(self, dist)
         vars(self).update(kw)
 
+    def _ensure_stringlike(self, option, what, default=None):
+        val = getattr(self, option)
+        if val is None:
+            setattr(self, option, default)
+            return default
+        elif not isinstance(val, string_types):
+            raise DistutilsOptionError("'%s' must be a %s (got `%s`)"
+                                       % (option, what, val))
+        return val
+
+    def ensure_string_list(self, option):
+        r"""Ensure that 'option' is a list of strings.  If 'option' is
+        currently a string, we split it either on /,\s*/ or /\s+/, so
+        "foo bar baz", "foo,bar,baz", and "foo,   bar baz" all become
+        ["foo", "bar", "baz"].
+        """
+        val = getattr(self, option)
+        if val is None:
+            return
+        elif isinstance(val, string_types):
+            setattr(self, option, re.split(r',\s*|\s+', val))
+        else:
+            if isinstance(val, list):
+                ok = all(isinstance(v, string_types) for v in val)
+            else:
+                ok = False
+            if not ok:
+                raise DistutilsOptionError(
+                      "'%s' must be a list of strings (got %r)"
+                      % (option, val))
+
     def reinitialize_command(self, command, reinit_subcommands=0, **kw):
         cmd = _Command.reinitialize_command(self, command, reinit_subcommands)
         vars(cmd).update(kw)
@@ -188,4 +224,5 @@ def findall(dir=os.curdir):
     return list(files)
 
 
+# Apply monkey patches
 monkey.patch_all()
diff --git a/setuptools/_deprecation_warning.py b/setuptools/_deprecation_warning.py
new file mode 100644
index 00000000..086b64dd
--- /dev/null
+++ b/setuptools/_deprecation_warning.py
@@ -0,0 +1,7 @@
+class SetuptoolsDeprecationWarning(Warning):
+    """
+    Base class for warning deprecations in ``setuptools``
+
+    This class is not derived from ``DeprecationWarning``, and as such is
+    visible by default.
+    """
diff --git a/setuptools/build_meta.py b/setuptools/build_meta.py
index 0067a7ac..c883d92f 100644
--- a/setuptools/build_meta.py
+++ b/setuptools/build_meta.py
@@ -112,12 +112,12 @@ def _get_immediate_subdirectories(a_dir):
 
 def get_requires_for_build_wheel(config_settings=None):
     config_settings = _fix_config(config_settings)
-    return _get_build_requires(config_settings, requirements=['setuptools', 'wheel'])
+    return _get_build_requires(config_settings, requirements=['wheel'])
 
 
 def get_requires_for_build_sdist(config_settings=None):
     config_settings = _fix_config(config_settings)
-    return _get_build_requires(config_settings, requirements=['setuptools'])
+    return _get_build_requires(config_settings, requirements=[])
 
 
 def prepare_metadata_for_build_wheel(metadata_directory, config_settings=None):
@@ -149,6 +149,15 @@ def prepare_metadata_for_build_wheel(metadata_directory, config_settings=None):
     return dist_infos[0]
 
 
+def _file_with_extension(directory, extension):
+    matching = (
+        f for f in os.listdir(directory)
+        if f.endswith(extension)
+    )
+    file, = matching
+    return file
+
+
 def build_wheel(wheel_directory, config_settings=None,
                 metadata_directory=None):
     config_settings = _fix_config(config_settings)
@@ -160,23 +169,15 @@ def build_wheel(wheel_directory, config_settings=None,
         shutil.rmtree(wheel_directory)
         shutil.copytree('dist', wheel_directory)
 
-    wheels = [f for f in os.listdir(wheel_directory)
-              if f.endswith('.whl')]
-
-    assert len(wheels) == 1
-    return wheels[0]
+    return _file_with_extension(wheel_directory, '.whl')
 
 
 def build_sdist(sdist_directory, config_settings=None):
     config_settings = _fix_config(config_settings)
     sdist_directory = os.path.abspath(sdist_directory)
-    sys.argv = sys.argv[:1] + ['sdist'] + \
+    sys.argv = sys.argv[:1] + ['sdist', '--formats', 'gztar'] + \
         config_settings["--global-option"] + \
         ["--dist-dir", sdist_directory]
     _run_setup()
 
-    sdists = [f for f in os.listdir(sdist_directory)
-              if f.endswith('.tar.gz')]
-
-    assert len(sdists) == 1
-    return sdists[0]
+    return _file_with_extension(sdist_directory, '.tar.gz')
diff --git a/setuptools/command/develop.py b/setuptools/command/develop.py
index fdc9fc43..009e4f93 100644
--- a/setuptools/command/develop.py
+++ b/setuptools/command/develop.py
@@ -7,7 +7,7 @@ import io
 
 from setuptools.extern import six
 
-from pkg_resources import Distribution, PathMetadata, normalize_path
+import pkg_resources
 from setuptools.command.easy_install import easy_install
 from setuptools import namespaces
 import setuptools
@@ -65,9 +65,9 @@ class develop(namespaces.DevelopInstaller, easy_install):
         if self.egg_path is None:
             self.egg_path = os.path.abspath(ei.egg_base)
 
-        target = normalize_path(self.egg_base)
-        egg_path = normalize_path(os.path.join(self.install_dir,
-                                               self.egg_path))
+        target = pkg_resources.normalize_path(self.egg_base)
+        egg_path = pkg_resources.normalize_path(
+            os.path.join(self.install_dir, self.egg_path))
         if egg_path != target:
             raise DistutilsOptionError(
                 "--egg-path must be a relative path from the install"
@@ -75,9 +75,9 @@ class develop(namespaces.DevelopInstaller, easy_install):
             )
 
         # Make a distribution for the package's source
-        self.dist = Distribution(
+        self.dist = pkg_resources.Distribution(
             target,
-            PathMetadata(target, os.path.abspath(ei.egg_info)),
+            pkg_resources.PathMetadata(target, os.path.abspath(ei.egg_info)),
             project_name=ei.egg_name
         )
 
@@ -97,13 +97,14 @@ class develop(namespaces.DevelopInstaller, easy_install):
         path_to_setup = egg_base.replace(os.sep, '/').rstrip('/')
         if path_to_setup != os.curdir:
             path_to_setup = '../' * (path_to_setup.count('/') + 1)
-        resolved = normalize_path(
+        resolved = pkg_resources.normalize_path(
             os.path.join(install_dir, egg_path, path_to_setup)
         )
-        if resolved != normalize_path(os.curdir):
+        if resolved != pkg_resources.normalize_path(os.curdir):
             raise DistutilsOptionError(
                 "Can't get a consistent path to setup script from"
-                " installation directory", resolved, normalize_path(os.curdir))
+                " installation directory", resolved,
+                pkg_resources.normalize_path(os.curdir))
         return path_to_setup
 
     def install_for_development(self):
@@ -114,7 +115,7 @@ class develop(namespaces.DevelopInstaller, easy_install):
             self.reinitialize_command('build_py', inplace=0)
             self.run_command('build_py')
             bpy_cmd = self.get_finalized_command("build_py")
-            build_path = normalize_path(bpy_cmd.build_lib)
+            build_path = pkg_resources.normalize_path(bpy_cmd.build_lib)
 
             # Build extensions
             self.reinitialize_command('egg_info', egg_base=build_path)
@@ -128,7 +129,8 @@ class develop(namespaces.DevelopInstaller, easy_install):
             self.egg_path = build_path
             self.dist.location = build_path
             # XXX
-            self.dist._provider = PathMetadata(build_path, ei_cmd.egg_info)
+            self.dist._provider = pkg_resources.PathMetadata(
+                build_path, ei_cmd.egg_info)
         else:
             # Without 2to3 inplace works fine:
             self.run_command('egg_info')
@@ -200,6 +202,7 @@ class VersionlessRequirement:
     name as the 'requirement' so that scripts will work across
     multiple versions.
 
+    >>> from pkg_resources import Distribution
     >>> dist = Distribution(project_name='foo', version='1.0')
     >>> str(dist.as_requirement())
     'foo==1.0'
diff --git a/setuptools/command/easy_install.py b/setuptools/command/easy_install.py
index c670a16e..06c98271 100644
--- a/setuptools/command/easy_install.py
+++ b/setuptools/command/easy_install.py
@@ -40,8 +40,11 @@ import subprocess
 import shlex
 import io
 
+
 from sysconfig import get_config_vars, get_path
 
+from setuptools import SetuptoolsDeprecationWarning
+
 from setuptools.extern import six
 from setuptools.extern.six.moves import configparser, map
 
@@ -2077,7 +2080,7 @@ class ScriptWriter:
     @classmethod
     def get_script_args(cls, dist, executable=None, wininst=False):
         # for backward compatibility
-        warnings.warn("Use get_args", DeprecationWarning)
+        warnings.warn("Use get_args", EasyInstallDeprecationWarning)
         writer = (WindowsScriptWriter if wininst else ScriptWriter).best()
         header = cls.get_script_header("", executable, wininst)
         return writer.get_args(dist, header)
@@ -2085,7 +2088,7 @@ class ScriptWriter:
     @classmethod
     def get_script_header(cls, script_text, executable=None, wininst=False):
         # for backward compatibility
-        warnings.warn("Use get_header", DeprecationWarning, stacklevel=2)
+        warnings.warn("Use get_header", EasyInstallDeprecationWarning, stacklevel=2)
         if wininst:
             executable = "python.exe"
         return cls.get_header(script_text, executable)
@@ -2120,7 +2123,7 @@ class ScriptWriter:
     @classmethod
     def get_writer(cls, force_windows):
         # for backward compatibility
-        warnings.warn("Use best", DeprecationWarning)
+        warnings.warn("Use best", EasyInstallDeprecationWarning)
         return WindowsScriptWriter.best() if force_windows else cls.best()
 
     @classmethod
@@ -2152,7 +2155,7 @@ class WindowsScriptWriter(ScriptWriter):
     @classmethod
     def get_writer(cls):
         # for backward compatibility
-        warnings.warn("Use best", DeprecationWarning)
+        warnings.warn("Use best", EasyInstallDeprecationWarning)
         return cls.best()
 
     @classmethod
@@ -2333,3 +2336,7 @@ def _patch_usage():
         yield
     finally:
         distutils.core.gen_usage = saved
+
+class EasyInstallDeprecationWarning(SetuptoolsDeprecationWarning):
+    """Class for warning about deprecations in EasyInstall in SetupTools. Not ignored by default, unlike DeprecationWarning."""
+    
diff --git a/setuptools/command/egg_info.py b/setuptools/command/egg_info.py
index 93100ab9..5d8f451e 100644
--- a/setuptools/command/egg_info.py
+++ b/setuptools/command/egg_info.py
@@ -31,7 +31,7 @@ import setuptools.unicode_utils as unicode_utils
 from setuptools.glob import glob
 
 from setuptools.extern import packaging
-
+from setuptools import SetuptoolsDeprecationWarning
 
 def translate_pattern(glob):
     """
@@ -576,6 +576,12 @@ class manifest_maker(sdist):
             self.filelist.extend(rcfiles)
         elif os.path.exists(self.manifest):
             self.read_manifest()
+
+        if os.path.exists("setup.py"):
+            # setup.py should be included by default, even if it's not
+            # the script called to create the sdist
+            self.filelist.append("setup.py")
+
         ei_cmd = self.get_finalized_command('egg_info')
         self.filelist.graft(ei_cmd.egg_info)
 
@@ -697,7 +703,7 @@ def get_pkg_info_revision():
     Get a -r### off of PKG-INFO Version in case this is an sdist of
     a subversion revision.
     """
-    warnings.warn("get_pkg_info_revision is deprecated.", DeprecationWarning)
+    warnings.warn("get_pkg_info_revision is deprecated.", EggInfoDeprecationWarning)
     if os.path.exists('PKG-INFO'):
         with io.open('PKG-INFO') as f:
             for line in f:
@@ -705,3 +711,7 @@ def get_pkg_info_revision():
                 if match:
                     return int(match.group(1))
     return 0
+
+
+class EggInfoDeprecationWarning(SetuptoolsDeprecationWarning):
+    """Class for warning about deprecations in eggInfo in setupTools. Not ignored by default, unlike DeprecationWarning."""
diff --git a/setuptools/command/upload.py b/setuptools/command/upload.py
index 72f24d8f..6db8888b 100644
--- a/setuptools/command/upload.py
+++ b/setuptools/command/upload.py
@@ -1,6 +1,19 @@
+import io
+import os
+import hashlib
 import getpass
+
+from base64 import standard_b64encode
+
 from distutils import log
 from distutils.command import upload as orig
+from distutils.spawn import spawn
+
+from distutils.errors import DistutilsError
+
+from setuptools.extern.six.moves.urllib.request import urlopen, Request
+from setuptools.extern.six.moves.urllib.error import HTTPError
+from setuptools.extern.six.moves.urllib.parse import urlparse
 
 
 class upload(orig.upload):
@@ -8,7 +21,6 @@ class upload(orig.upload):
     Override default upload behavior to obtain password
     in a variety of different ways.
     """
-
     def run(self):
         try:
             orig.upload.run(self)
@@ -33,6 +45,137 @@ class upload(orig.upload):
             self._prompt_for_password()
         )
 
+    def upload_file(self, command, pyversion, filename):
+        # Makes sure the repository URL is compliant
+        schema, netloc, url, params, query, fragments = \
+            urlparse(self.repository)
+        if params or query or fragments:
+            raise AssertionError("Incompatible url %s" % self.repository)
+
+        if schema not in ('http', 'https'):
+            raise AssertionError("unsupported schema " + schema)
+
+        # Sign if requested
+        if self.sign:
+            gpg_args = ["gpg", "--detach-sign", "-a", filename]
+            if self.identity:
+                gpg_args[2:2] = ["--local-user", self.identity]
+            spawn(gpg_args,
+                  dry_run=self.dry_run)
+
+        # Fill in the data - send all the meta-data in case we need to
+        # register a new release
+        with open(filename, 'rb') as f:
+            content = f.read()
+
+        meta = self.distribution.metadata
+
+        data = {
+            # action
+            ':action': 'file_upload',
+            'protocol_version': '1',
+
+            # identify release
+            'name': meta.get_name(),
+            'version': meta.get_version(),
+
+            # file content
+            'content': (os.path.basename(filename), content),
+            'filetype': command,
+            'pyversion': pyversion,
+            'md5_digest': hashlib.md5(content).hexdigest(),
+
+            # additional meta-data
+            'metadata_version': str(meta.get_metadata_version()),
+            'summary': meta.get_description(),
+            'home_page': meta.get_url(),
+            'author': meta.get_contact(),
+            'author_email': meta.get_contact_email(),
+            'license': meta.get_licence(),
+            'description': meta.get_long_description(),
+            'keywords': meta.get_keywords(),
+            'platform': meta.get_platforms(),
+            'classifiers': meta.get_classifiers(),
+            'download_url': meta.get_download_url(),
+            # PEP 314
+            'provides': meta.get_provides(),
+            'requires': meta.get_requires(),
+            'obsoletes': meta.get_obsoletes(),
+            }
+
+        data['comment'] = ''
+
+        if self.sign:
+            data['gpg_signature'] = (os.path.basename(filename) + ".asc",
+                                     open(filename+".asc", "rb").read())
+
+        # set up the authentication
+        user_pass = (self.username + ":" + self.password).encode('ascii')
+        # The exact encoding of the authentication string is debated.
+        # Anyway PyPI only accepts ascii for both username or password.
+        auth = "Basic " + standard_b64encode(user_pass).decode('ascii')
+
+        # Build up the MIME payload for the POST data
+        boundary = '--------------GHSKFJDLGDS7543FJKLFHRE75642756743254'
+        sep_boundary = b'\r\n--' + boundary.encode('ascii')
+        end_boundary = sep_boundary + b'--\r\n'
+        body = io.BytesIO()
+        for key, value in data.items():
+            title = '\r\nContent-Disposition: form-data; name="%s"' % key
+            # handle multiple entries for the same name
+            if not isinstance(value, list):
+                value = [value]
+            for value in value:
+                if type(value) is tuple:
+                    title += '; filename="%s"' % value[0]
+                    value = value[1]
+                else:
+                    value = str(value).encode('utf-8')
+                body.write(sep_boundary)
+                body.write(title.encode('utf-8'))
+                body.write(b"\r\n\r\n")
+                body.write(value)
+        body.write(end_boundary)
+        body = body.getvalue()
+
+        msg = "Submitting %s to %s" % (filename, self.repository)
+        self.announce(msg, log.INFO)
+
+        # build the Request
+        headers = {
+            'Content-type': 'multipart/form-data; boundary=%s' % boundary,
+            'Content-length': str(len(body)),
+            'Authorization': auth,
+        }
+
+        request = Request(self.repository, data=body,
+                          headers=headers)
+        # send the data
+        try:
+            result = urlopen(request)
+            status = result.getcode()
+            reason = result.msg
+        except HTTPError as e:
+            status = e.code
+            reason = e.msg
+        except OSError as e:
+            self.announce(str(e), log.ERROR)
+            raise
+
+        if status == 200:
+            self.announce('Server response (%s): %s' % (status, reason),
+                          log.INFO)
+            if self.show_response:
+                text = getattr(self, '_read_pypi_response',
+                               lambda x: None)(result)
+                if text is not None:
+                    msg = '\n'.join(('-' * 75, text, '-' * 75))
+                    self.announce(msg, log.INFO)
+        else:
+            msg = 'Upload failed (%s): %s' % (status, reason)
+            self.announce(msg, log.ERROR)
+            raise DistutilsError(msg)
+
     def _load_password_from_keyring(self):
         """
         Attempt to load password from keyring. Suppress Exceptions.
diff --git a/setuptools/config.py b/setuptools/config.py
index 73a3bf70..b6626043 100644
--- a/setuptools/config.py
+++ b/setuptools/config.py
@@ -2,8 +2,12 @@ from __future__ import absolute_import, unicode_literals
 import io
 import os
 import sys
+
+import warnings
+import functools
 from collections import defaultdict
 from functools import partial
+from functools import wraps
 from importlib import import_module
 
 from distutils.errors import DistutilsOptionError, DistutilsFileError
@@ -61,6 +65,18 @@ def read_configuration(
     return configuration_to_dict(handlers)
 
 
+def _get_option(target_obj, key):
+    """
+    Given a target object and option key, get that option from
+    the target object, either through a get_{key} method or
+    from an attribute directly.
+    """
+    getter_name = 'get_{key}'.format(**locals())
+    by_attribute = functools.partial(getattr, target_obj, key)
+    getter = getattr(target_obj, getter_name, by_attribute)
+    return getter()
+
+
 def configuration_to_dict(handlers):
     """Returns configuration data gathered by given handlers as a dict.
 
@@ -72,20 +88,9 @@ def configuration_to_dict(handlers):
     config_dict = defaultdict(dict)
 
     for handler in handlers:
-
-        obj_alias = handler.section_prefix
-        target_obj = handler.target_obj
-
         for option in handler.set_options:
-            getter = getattr(target_obj, 'get_%s' % option, None)
-
-            if getter is None:
-                value = getattr(target_obj, option)
-
-            else:
-                value = getter()
-
-            config_dict[obj_alias][option] = value
+            value = _get_option(handler.target_obj, option)
+            config_dict[handler.section_prefix][option] = value
 
     return config_dict
 
@@ -110,7 +115,8 @@ def parse_configuration(
     options.parse()
 
     meta = ConfigMetadataHandler(
-        distribution.metadata, command_options, ignore_option_errors, distribution.package_dir)
+        distribution.metadata, command_options, ignore_option_errors,
+        distribution.package_dir)
     meta.parse()
 
     return meta, options
@@ -241,6 +247,26 @@ class ConfigHandler:
         return value in ('1', 'true', 'yes')
 
     @classmethod
+    def _exclude_files_parser(cls, key):
+        """Returns a parser function to make sure field inputs
+        are not files.
+
+        Parses a value after getting the key so error messages are
+        more informative.
+
+        :param key:
+        :rtype: callable
+        """
+        def parser(value):
+            exclude_directive = 'file:'
+            if value.startswith(exclude_directive):
+                raise ValueError(
+                    'Only strings are accepted for the {0} field, '
+                    'files are not accepted'.format(key))
+            return value
+        return parser
+
+    @classmethod
     def _parse_file(cls, value):
         """Represents value as a string, allowing including text
         from nearest files using `file:` directive.
@@ -249,7 +275,6 @@ class ConfigHandler:
         directory with setup.py.
 
         Examples:
-            file: LICENSE
             file: README.rst, CHANGELOG.md, src/file.txt
 
         :param str value:
@@ -388,7 +413,7 @@ class ConfigHandler:
 
             section_parser_method = getattr(
                 self,
-                # Dots in section names are tranlsated into dunderscores.
+                # Dots in section names are translated into dunderscores.
                 ('parse_section%s' % method_postfix).replace('.', '__'),
                 None)
 
@@ -399,6 +424,20 @@ class ConfigHandler:
 
             section_parser_method(section_options)
 
+    def _deprecated_config_handler(self, func, msg, warning_class):
+        """ this function will wrap around parameters that are deprecated
+
+        :param msg: deprecation message
+        :param warning_class: class of warning exception to be raised
+        :param func: function to be wrapped around
+        """
+        @wraps(func)
+        def config_handler(*args, **kwargs):
+            warnings.warn(msg, warning_class)
+            return func(*args, **kwargs)
+
+        return config_handler
+
 
 class ConfigMetadataHandler(ConfigHandler):
 
@@ -429,15 +468,20 @@ class ConfigMetadataHandler(ConfigHandler):
         parse_list = self._parse_list
         parse_file = self._parse_file
         parse_dict = self._parse_dict
+        exclude_files_parser = self._exclude_files_parser
 
         return {
             'platforms': parse_list,
             'keywords': parse_list,
             'provides': parse_list,
-            'requires': parse_list,
+            'requires': self._deprecated_config_handler(
+                parse_list,
+                "The requires parameter is deprecated, please use "
+                "install_requires for runtime dependencies.",
+                DeprecationWarning),
             'obsoletes': parse_list,
             'classifiers': self._get_parser_compound(parse_file, parse_list),
-            'license': parse_file,
+            'license': exclude_files_parser('license'),
             'description': parse_file,
             'long_description': parse_file,
             'version': self._parse_version,
@@ -458,9 +502,12 @@ class ConfigMetadataHandler(ConfigHandler):
             # Be strict about versions loaded from file because it's easy to
             # accidentally include newlines and other unintended content
             if isinstance(parse(version), LegacyVersion):
-                raise DistutilsOptionError('Version loaded from %s does not comply with PEP 440: %s' % (
-                    value, version
-                ))
+                tmpl = (
+                    'Version loaded from {value} does not '
+                    'comply with PEP 440: {version}'
+                )
+                raise DistutilsOptionError(tmpl.format(**locals()))
+
             return version
 
         version = self._parse_attr(value, self.package_dir)
@@ -518,12 +565,13 @@ class ConfigOptionsHandler(ConfigHandler):
         find_directives = ['find:', 'find_namespace:']
         trimmed_value = value.strip()
 
-        if not trimmed_value in find_directives:
+        if trimmed_value not in find_directives:
             return self._parse_list(value)
 
         findns = trimmed_value == find_directives[1]
         if findns and not PY3:
-            raise DistutilsOptionError('find_namespace: directive is unsupported on Python < 3.3')
+            raise DistutilsOptionError(
+                'find_namespace: directive is unsupported on Python < 3.3')
 
         # Read function arguments from a dedicated section.
         find_kwargs = self.parse_section_packages__find(
diff --git a/setuptools/dist.py b/setuptools/dist.py
index 6ee4a97f..b8551228 100644
--- a/setuptools/dist.py
+++ b/setuptools/dist.py
@@ -1,6 +1,8 @@
 # -*- coding: utf-8 -*-
 __all__ = ['Distribution']
 
+import io
+import sys
 import re
 import os
 import warnings
@@ -9,8 +11,15 @@ import distutils.log
 import distutils.core
 import distutils.cmd
 import distutils.dist
+from distutils.errors import DistutilsOptionError
+from distutils.util import strtobool
+from distutils.debug import DEBUG
+from distutils.fancy_getopt import translate_longopt
 import itertools
+
 from collections import defaultdict
+from email import message_from_file
+
 from distutils.errors import (
     DistutilsOptionError, DistutilsPlatformError, DistutilsSetupError,
 )
@@ -21,51 +30,121 @@ from setuptools.extern import six
 from setuptools.extern import packaging
 from setuptools.extern.six.moves import map, filter, filterfalse
 
+from . import SetuptoolsDeprecationWarning
+
 from setuptools.depends import Require
 from setuptools import windows_support
 from setuptools.monkey import get_unpatched
 from setuptools.config import parse_configuration
+from .unicode_utils import detect_encoding
 import pkg_resources
-from .py36compat import Distribution_parse_config_files
 
 __import__('setuptools.extern.packaging.specifiers')
 __import__('setuptools.extern.packaging.version')
 
 
 def _get_unpatched(cls):
-    warnings.warn("Do not call this function", DeprecationWarning)
+    warnings.warn("Do not call this function", DistDeprecationWarning)
     return get_unpatched(cls)
 
 
-def get_metadata_version(dist_md):
-    if dist_md.long_description_content_type or dist_md.provides_extras:
-        return StrictVersion('2.1')
-    elif (dist_md.maintainer is not None or
-          dist_md.maintainer_email is not None or
-          getattr(dist_md, 'python_requires', None) is not None):
-        return StrictVersion('1.2')
-    elif (dist_md.provides or dist_md.requires or dist_md.obsoletes or
-            dist_md.classifiers or dist_md.download_url):
-        return StrictVersion('1.1')
+def get_metadata_version(self):
+    mv = getattr(self, 'metadata_version', None)
 
-    return StrictVersion('1.0')
+    if mv is None:
+        if self.long_description_content_type or self.provides_extras:
+            mv = StrictVersion('2.1')
+        elif (self.maintainer is not None or
+              self.maintainer_email is not None or
+              getattr(self, 'python_requires', None) is not None):
+            mv = StrictVersion('1.2')
+        elif (self.provides or self.requires or self.obsoletes or
+                self.classifiers or self.download_url):
+            mv = StrictVersion('1.1')
+        else:
+            mv = StrictVersion('1.0')
+
+        self.metadata_version = mv
+
+    return mv
+
+
+def read_pkg_file(self, file):
+    """Reads the metadata values from a file object."""
+    msg = message_from_file(file)
+
+    def _read_field(name):
+        value = msg[name]
+        if value == 'UNKNOWN':
+            return None
+        return value
+
+    def _read_list(name):
+        values = msg.get_all(name, None)
+        if values == []:
+            return None
+        return values
+
+    self.metadata_version = StrictVersion(msg['metadata-version'])
+    self.name = _read_field('name')
+    self.version = _read_field('version')
+    self.description = _read_field('summary')
+    # we are filling author only.
+    self.author = _read_field('author')
+    self.maintainer = None
+    self.author_email = _read_field('author-email')
+    self.maintainer_email = None
+    self.url = _read_field('home-page')
+    self.license = _read_field('license')
+
+    if 'download-url' in msg:
+        self.download_url = _read_field('download-url')
+    else:
+        self.download_url = None
+
+    self.long_description = _read_field('description')
+    self.description = _read_field('summary')
+
+    if 'keywords' in msg:
+        self.keywords = _read_field('keywords').split(',')
+
+    self.platforms = _read_list('platform')
+    self.classifiers = _read_list('classifier')
+
+    # PEP 314 - these fields only exist in 1.1
+    if self.metadata_version == StrictVersion('1.1'):
+        self.requires = _read_list('requires')
+        self.provides = _read_list('provides')
+        self.obsoletes = _read_list('obsoletes')
+    else:
+        self.requires = None
+        self.provides = None
+        self.obsoletes = None
 
 
 # Based on Python 3.5 version
 def write_pkg_file(self, file):
     """Write the PKG-INFO format data to a file object.
     """
-    version = get_metadata_version(self)
+    version = self.get_metadata_version()
+
+    if six.PY2:
+        def write_field(key, value):
+            file.write("%s: %s\n" % (key, self._encode_field(value)))
+    else:
+        def write_field(key, value):
+            file.write("%s: %s\n" % (key, value))
+
 
-    file.write('Metadata-Version: %s\n' % version)
-    file.write('Name: %s\n' % self.get_name())
-    file.write('Version: %s\n' % self.get_version())
-    file.write('Summary: %s\n' % self.get_description())
-    file.write('Home-page: %s\n' % self.get_url())
+    write_field('Metadata-Version', str(version))
+    write_field('Name', self.get_name())
+    write_field('Version', self.get_version())
+    write_field('Summary', self.get_description())
+    write_field('Home-page', self.get_url())
 
     if version < StrictVersion('1.2'):
-        file.write('Author: %s\n' % self.get_contact())
-        file.write('Author-email: %s\n' % self.get_contact_email())
+        write_field('Author', self.get_contact())
+        write_field('Author-email', self.get_contact_email())
     else:
         optional_fields = (
             ('Author', 'author'),
@@ -76,28 +155,26 @@ def write_pkg_file(self, file):
 
         for field, attr in optional_fields:
             attr_val = getattr(self, attr)
-            if six.PY2:
-                attr_val = self._encode_field(attr_val)
 
             if attr_val is not None:
-                file.write('%s: %s\n' % (field, attr_val))
+                write_field(field, attr_val)
 
-    file.write('License: %s\n' % self.get_license())
+    write_field('License', self.get_license())
     if self.download_url:
-        file.write('Download-URL: %s\n' % self.download_url)
+        write_field('Download-URL', self.download_url)
     for project_url in self.project_urls.items():
-        file.write('Project-URL: %s, %s\n' % project_url)
+        write_field('Project-URL',  '%s, %s' % project_url)
 
     long_desc = rfc822_escape(self.get_long_description())
-    file.write('Description: %s\n' % long_desc)
+    write_field('Description', long_desc)
 
     keywords = ','.join(self.get_keywords())
     if keywords:
-        file.write('Keywords: %s\n' % keywords)
+        write_field('Keywords', keywords)
 
     if version >= StrictVersion('1.2'):
         for platform in self.get_platforms():
-            file.write('Platform: %s\n' % platform)
+            write_field('Platform', platform)
     else:
         self._write_list(file, 'Platform', self.get_platforms())
 
@@ -110,17 +187,17 @@ def write_pkg_file(self, file):
 
     # Setuptools specific for PEP 345
     if hasattr(self, 'python_requires'):
-        file.write('Requires-Python: %s\n' % self.python_requires)
+        write_field('Requires-Python', self.python_requires)
 
     # PEP 566
     if self.long_description_content_type:
-        file.write(
-            'Description-Content-Type: %s\n' %
+        write_field(
+            'Description-Content-Type',
             self.long_description_content_type
         )
     if self.provides_extras:
         for extra in self.provides_extras:
-            file.write('Provides-Extra: %s\n' % extra)
+            write_field('Provides-Extra', extra)
 
 
 sequence = tuple, list
@@ -260,7 +337,7 @@ def check_packages(dist, attr, value):
 _Distribution = get_unpatched(distutils.core.Distribution)
 
 
-class Distribution(Distribution_parse_config_files, _Distribution):
+class Distribution(_Distribution):
     """Distribution with support for features, tests, and package data
 
     This is an enhanced version of 'distutils.dist.Distribution' that
@@ -484,12 +561,125 @@ class Distribution(Distribution_parse_config_files, _Distribution):
         req.marker = None
         return req
 
+    def _parse_config_files(self, filenames=None):
+        """
+        Adapted from distutils.dist.Distribution.parse_config_files,
+        this method provides the same functionality in subtly-improved
+        ways.
+        """
+        from setuptools.extern.six.moves.configparser import ConfigParser
+
+        # Ignore install directory options if we have a venv
+        if six.PY3 and sys.prefix != sys.base_prefix:
+            ignore_options = [
+                'install-base', 'install-platbase', 'install-lib',
+                'install-platlib', 'install-purelib', 'install-headers',
+                'install-scripts', 'install-data', 'prefix', 'exec-prefix',
+                'home', 'user', 'root']
+        else:
+            ignore_options = []
+
+        ignore_options = frozenset(ignore_options)
+
+        if filenames is None:
+            filenames = self.find_config_files()
+
+        if DEBUG:
+            self.announce("Distribution.parse_config_files():")
+
+        parser = ConfigParser()
+        for filename in filenames:
+            with io.open(filename, 'rb') as fp:
+                encoding = detect_encoding(fp)
+                if DEBUG:
+                    self.announce("  reading %s [%s]" % (
+                        filename, encoding or 'locale')
+                    )
+                reader = io.TextIOWrapper(fp, encoding=encoding)
+                (parser.read_file if six.PY3 else parser.readfp)(reader)
+            for section in parser.sections():
+                options = parser.options(section)
+                opt_dict = self.get_option_dict(section)
+
+                for opt in options:
+                    if opt != '__name__' and opt not in ignore_options:
+                        val = parser.get(section, opt)
+                        opt = opt.replace('-', '_')
+                        opt_dict[opt] = (filename, val)
+
+            # Make the ConfigParser forget everything (so we retain
+            # the original filenames that options come from)
+            parser.__init__()
+
+        # If there was a "global" section in the config file, use it
+        # to set Distribution options.
+
+        if 'global' in self.command_options:
+            for (opt, (src, val)) in self.command_options['global'].items():
+                alias = self.negative_opt.get(opt)
+                try:
+                    if alias:
+                        setattr(self, alias, not strtobool(val))
+                    elif opt in ('verbose', 'dry_run'):  # ugh!
+                        setattr(self, opt, strtobool(val))
+                    else:
+                        setattr(self, opt, val)
+                except ValueError as msg:
+                    raise DistutilsOptionError(msg)
+
+    def _set_command_options(self, command_obj, option_dict=None):
+        """
+        Set the options for 'command_obj' from 'option_dict'.  Basically
+        this means copying elements of a dictionary ('option_dict') to
+        attributes of an instance ('command').
+
+        'command_obj' must be a Command instance.  If 'option_dict' is not
+        supplied, uses the standard option dictionary for this command
+        (from 'self.command_options').
+
+        (Adopted from distutils.dist.Distribution._set_command_options)
+        """
+        command_name = command_obj.get_command_name()
+        if option_dict is None:
+            option_dict = self.get_option_dict(command_name)
+
+        if DEBUG:
+            self.announce("  setting options for '%s' command:" % command_name)
+        for (option, (source, value)) in option_dict.items():
+            if DEBUG:
+                self.announce("    %s = %s (from %s)" % (option, value,
+                                                         source))
+            try:
+                bool_opts = [translate_longopt(o)
+                             for o in command_obj.boolean_options]
+            except AttributeError:
+                bool_opts = []
+            try:
+                neg_opt = command_obj.negative_opt
+            except AttributeError:
+                neg_opt = {}
+
+            try:
+                is_string = isinstance(value, six.string_types)
+                if option in neg_opt and is_string:
+                    setattr(command_obj, neg_opt[option], not strtobool(value))
+                elif option in bool_opts and is_string:
+                    setattr(command_obj, option, strtobool(value))
+                elif hasattr(command_obj, option):
+                    setattr(command_obj, option, value)
+                else:
+                    raise DistutilsOptionError(
+                        "error in %s: command '%s' has no such option '%s'"
+                        % (source, command_name, option))
+            except ValueError as msg:
+                raise DistutilsOptionError(msg)
+
     def parse_config_files(self, filenames=None, ignore_option_errors=False):
         """Parses configuration files from various levels
         and loads configuration.
 
         """
-        _Distribution.parse_config_files(self, filenames=filenames)
+        self._parse_config_files(filenames=filenames)
 
         parse_configuration(self, self.command_options,
                             ignore_option_errors=ignore_option_errors)
@@ -980,7 +1170,7 @@ class Feature:
             "Features are deprecated and will be removed in a future "
             "version. See https://github.com/pypa/setuptools/issues/65."
         )
-        warnings.warn(msg, DeprecationWarning, stacklevel=3)
+        warnings.warn(msg, DistDeprecationWarning, stacklevel=3)
 
     def __init__(
             self, description, standard=False, available=True,
@@ -1069,3 +1259,7 @@ class Feature:
                     " doesn't contain any packages or modules under %s"
                     % (self.description, item, item)
                 )
+
+
+class DistDeprecationWarning(SetuptoolsDeprecationWarning):
+    """Class for warning about deprecations in dist in setuptools. Not ignored by default, unlike DeprecationWarning."""
diff --git a/setuptools/monkey.py b/setuptools/monkey.py
index 05a738b0..3c77f8cf 100644
--- a/setuptools/monkey.py
+++ b/setuptools/monkey.py
@@ -84,7 +84,7 @@ def patch_all():
         warehouse = 'https://upload.pypi.org/legacy/'
         distutils.config.PyPIRCCommand.DEFAULT_REPOSITORY = warehouse
 
-    _patch_distribution_metadata_write_pkg_file()
+    _patch_distribution_metadata()
 
     # Install Distribution throughout the distutils
     for module in distutils.dist, distutils.core, distutils.cmd:
@@ -101,11 +101,11 @@ def patch_all():
     patch_for_msvc_specialized_compiler()
 
 
-def _patch_distribution_metadata_write_pkg_file():
-    """Patch write_pkg_file to also write Requires-Python/Requires-External"""
-    distutils.dist.DistributionMetadata.write_pkg_file = (
-        setuptools.dist.write_pkg_file
-    )
+def _patch_distribution_metadata():
+    """Patch write_pkg_file and read_pkg_file for higher metadata standards"""
+    for attr in ('write_pkg_file', 'read_pkg_file', 'get_metadata_version'):
+        new_val = getattr(setuptools.dist, attr)
+        setattr(distutils.dist.DistributionMetadata, attr, new_val)
 
 
 def patch_func(replacement, target_mod, func_name):
diff --git a/setuptools/package_index.py b/setuptools/package_index.py
index 1608b91a..7e9517ce 100644
--- a/setuptools/package_index.py
+++ b/setuptools/package_index.py
@@ -850,13 +850,16 @@ class PackageIndex(Environment):
 
     def _download_svn(self, url, filename):
         warnings.warn("SVN download support is deprecated", UserWarning)
+        def splituser(host):
+            user, delim, host = host.rpartition('@')
+            return user, host
         url = url.split('#', 1)[0]  # remove any fragment for svn's sake
         creds = ''
         if url.lower().startswith('svn:') and '@' in url:
             scheme, netloc, path, p, q, f = urllib.parse.urlparse(url)
             if not netloc and path.startswith('//') and '/' in path[2:]:
                 netloc, path = path[2:].split('/', 1)
-                auth, host = urllib.parse.splituser(netloc)
+                auth, host = splituser(netloc)
                 if auth:
                     if ':' in auth:
                         user, pw = auth.split(':', 1)
@@ -1047,15 +1050,16 @@ class PyPIConfig(configparser.RawConfigParser):
 def open_with_auth(url, opener=urllib.request.urlopen):
     """Open a urllib2 request, handling HTTP authentication"""
 
-    scheme, netloc, path, params, query, frag = urllib.parse.urlparse(url)
+    parsed = urllib.parse.urlparse(url)
+    scheme, netloc, path, params, query, frag = parsed
 
     # Double scheme does not raise on Mac OS X as revealed by a
     # failing test. We would expect "nonnumeric port". Refs #20.
     if netloc.endswith(':'):
         raise http_client.InvalidURL("nonnumeric port: ''")
 
-    if scheme in ('http', 'https'):
-        auth, host = urllib.parse.splituser(netloc)
+    if scheme in ('http', 'https') and parsed.username:
+        auth = ':'.join((parsed.username, parsed.password))
     else:
         auth = None
 
@@ -1068,7 +1072,7 @@ def open_with_auth(url, opener=urllib.request.urlopen):
 
     if auth:
         auth = "Basic " + _encode_auth(auth)
-        parts = scheme, host, path, params, query, frag
+        parts = scheme, parsed.hostname, path, params, query, frag
         new_url = urllib.parse.urlunparse(parts)
         request = urllib.request.Request(new_url)
         request.add_header("Authorization", auth)
@@ -1082,7 +1086,7 @@ def open_with_auth(url, opener=urllib.request.urlopen):
         # Put authentication info back into request URL if same host,
         # so that links found on the page will work
         s2, h2, path2, param2, query2, frag2 = urllib.parse.urlparse(fp.url)
-        if s2 == scheme and h2 == host:
+        if s2 == scheme and h2 == parsed.hostname:
             parts = s2, netloc, path2, param2, query2, frag2
             fp.url = urllib.parse.urlunparse(parts)
 
diff --git a/setuptools/pep425tags.py b/setuptools/pep425tags.py
index 8bf4277d..48745a29 100644
--- a/setuptools/pep425tags.py
+++ b/setuptools/pep425tags.py
@@ -161,7 +161,7 @@ def is_manylinux1_compatible():
 
 def get_darwin_arches(major, minor, machine):
     """Return a list of supported arches (including group arches) for
-    the given major, minor and machine architecture of an macOS machine.
+    the given major, minor and machine architecture of a macOS machine.
     """
     arches = []
 
diff --git a/setuptools/py36compat.py b/setuptools/py36compat.py
deleted file mode 100644
index f5279696..00000000
--- a/setuptools/py36compat.py
+++ /dev/null
@@ -1,82 +0,0 @@
-import sys
-from distutils.errors import DistutilsOptionError
-from distutils.util import strtobool
-from distutils.debug import DEBUG
-
-
-class Distribution_parse_config_files:
-    """
-    Mix-in providing forward-compatibility for functionality to be
-    included by default on Python 3.7.
-
-    Do not edit the code in this class except to update functionality
-    as implemented in distutils.
-    """
-    def parse_config_files(self, filenames=None):
-        from configparser import ConfigParser
-
-        # Ignore install directory options if we have a venv
-        if sys.prefix != sys.base_prefix:
-            ignore_options = [
-                'install-base', 'install-platbase', 'install-lib',
-                'install-platlib', 'install-purelib', 'install-headers',
-                'install-scripts', 'install-data', 'prefix', 'exec-prefix',
-                'home', 'user', 'root']
-        else:
-            ignore_options = []
-
-        ignore_options = frozenset(ignore_options)
-
-        if filenames is None:
-            filenames = self.find_config_files()
-
-        if DEBUG:
-            self.announce("Distribution.parse_config_files():")
-
-        parser = ConfigParser(interpolation=None)
-        for filename in filenames:
-            if DEBUG:
-                self.announce("  reading %s" % filename)
-            parser.read(filename)
-            for section in parser.sections():
-                options = parser.options(section)
-                opt_dict = self.get_option_dict(section)
-
-                for opt in options:
-                    if opt != '__name__' and opt not in ignore_options:
-                        val = parser.get(section,opt)
-                        opt = opt.replace('-', '_')
-                        opt_dict[opt] = (filename, val)
-
-            # Make the ConfigParser forget everything (so we retain
-            # the original filenames that options come from)
-            parser.__init__()
-
-        # If there was a "global" section in the config file, use it
-        # to set Distribution options.
-
-        if 'global' in self.command_options:
-            for (opt, (src, val)) in self.command_options['global'].items():
-                alias = self.negative_opt.get(opt)
-                try:
-                    if alias:
-                        setattr(self, alias, not strtobool(val))
-                    elif opt in ('verbose', 'dry_run'): # ugh!
-                        setattr(self, opt, strtobool(val))
-                    else:
-                        setattr(self, opt, val)
-                except ValueError as msg:
-                    raise DistutilsOptionError(msg)
-
-
-if sys.version_info < (3,):
-    # Python 2 behavior is sufficient
-    class Distribution_parse_config_files:
-        pass
-
-
-if False:
-    # When updated behavior is available upstream,
-    # disable override here.
-    class Distribution_parse_config_files:
-        pass
diff --git a/setuptools/ssl_support.py b/setuptools/ssl_support.py
index 6362f1f4..226db694 100644
--- a/setuptools/ssl_support.py
+++ b/setuptools/ssl_support.py
@@ -59,7 +59,7 @@ if not match_hostname:
     def _dnsname_match(dn, hostname, max_wildcards=1):
         """Matching according to RFC 6125, section 6.4.3
 
-        http://tools.ietf.org/html/rfc6125#section-6.4.3
+        https://tools.ietf.org/html/rfc6125#section-6.4.3
         """
         pats = []
         if not dn:
diff --git a/setuptools/tests/files.py b/setuptools/tests/files.py
index 465a6b41..bad2189d 100644
--- a/setuptools/tests/files.py
+++ b/setuptools/tests/files.py
@@ -6,10 +6,13 @@ import pkg_resources.py31compat
 
 def build_files(file_defs, prefix=""):
     """
-    Build a set of files/directories, as described by the file_defs dictionary.
+    Build a set of files/directories, as described by the
+    file_defs dictionary.
 
-    Each key/value pair in the dictionary is interpreted as a filename/contents
-    pair. If the contents value is a dictionary, a directory is created, and the
+    Each key/value pair in the dictionary is interpreted as
+    a filename/contents
+    pair. If the contents value is a dictionary, a directory
+    is created, and the
     dictionary interpreted as the files within it, recursively.
 
     For example:
diff --git a/setuptools/tests/server.py b/setuptools/tests/server.py
index 35312120..fc3a5975 100644
--- a/setuptools/tests/server.py
+++ b/setuptools/tests/server.py
@@ -19,10 +19,11 @@ class IndexServer(BaseHTTPServer.HTTPServer):
         s.stop()
     """
 
-    def __init__(self, server_address=('', 0),
+    def __init__(
+            self, server_address=('', 0),
             RequestHandlerClass=SimpleHTTPServer.SimpleHTTPRequestHandler):
-        BaseHTTPServer.HTTPServer.__init__(self, server_address,
-            RequestHandlerClass)
+        BaseHTTPServer.HTTPServer.__init__(
+            self, server_address, RequestHandlerClass)
         self._run = True
 
     def start(self):
@@ -56,10 +57,11 @@ class MockServer(BaseHTTPServer.HTTPServer, threading.Thread):
     A simple HTTP Server that records the requests made to it.
     """
 
-    def __init__(self, server_address=('', 0),
+    def __init__(
+            self, server_address=('', 0),
             RequestHandlerClass=RequestRecorder):
-        BaseHTTPServer.HTTPServer.__init__(self, server_address,
-            RequestHandlerClass)
+        BaseHTTPServer.HTTPServer.__init__(
+            self, server_address, RequestHandlerClass)
         threading.Thread.__init__(self)
         self.setDaemon(True)
         self.requests = []
diff --git a/setuptools/tests/test_build_clib.py b/setuptools/tests/test_build_clib.py
index aebcc350..3779e679 100644
--- a/setuptools/tests/test_build_clib.py
+++ b/setuptools/tests/test_build_clib.py
@@ -1,6 +1,4 @@
 import pytest
-import os
-import shutil
 
 import mock
 from distutils.errors import DistutilsSetupError
@@ -40,13 +38,14 @@ class TestBuildCLib:
         # with that out of the way, let's see if the crude dependency
         # system works
         cmd.compiler = mock.MagicMock(spec=cmd.compiler)
-        mock_newer.return_value = ([],[])
+        mock_newer.return_value = ([], [])
 
         obj_deps = {'': ('global.h',), 'example.c': ('example.h',)}
-        libs = [('example', {'sources': ['example.c'] ,'obj_deps': obj_deps})]
+        libs = [('example', {'sources': ['example.c'], 'obj_deps': obj_deps})]
 
         cmd.build_libraries(libs)
-        assert [['example.c', 'global.h', 'example.h']] in mock_newer.call_args[0]
+        assert [['example.c', 'global.h', 'example.h']] in \
+            mock_newer.call_args[0]
         assert not cmd.compiler.compile.called
         assert cmd.compiler.create_static_lib.call_count == 1
 
diff --git a/setuptools/tests/test_build_meta.py b/setuptools/tests/test_build_meta.py
index 7b195e2c..82b44c89 100644
--- a/setuptools/tests/test_build_meta.py
+++ b/setuptools/tests/test_build_meta.py
@@ -2,16 +2,20 @@ from __future__ import unicode_literals
 
 import os
 import shutil
+import tarfile
 
 import pytest
 
+from setuptools.build_meta import build_sdist
 from .files import build_files
 from .textwrap import DALS
+from . import py2_only
 
 __metaclass__ = type
 
-futures = pytest.importorskip('concurrent.futures')
-importlib = pytest.importorskip('importlib')
+# Backports on Python 2.7
+import importlib
+from concurrent import futures
 
 
 class BuildBackendBase:
@@ -108,13 +112,13 @@ def build_backend(tmpdir, request):
 
 def test_get_requires_for_build_wheel(build_backend):
     actual = build_backend.get_requires_for_build_wheel()
-    expected = ['six', 'setuptools', 'wheel']
+    expected = ['six', 'wheel']
     assert sorted(actual) == sorted(expected)
 
 
 def test_get_requires_for_build_sdist(build_backend):
     actual = build_backend.get_requires_for_build_sdist()
-    expected = ['six', 'setuptools']
+    expected = ['six']
     assert sorted(actual) == sorted(expected)
 
 
@@ -143,7 +147,7 @@ def test_prepare_metadata_for_build_wheel(build_backend):
     assert os.path.isfile(os.path.join(dist_dir, dist_info, 'METADATA'))
 
 
-@pytest.mark.skipif('sys.version_info > (3,)')
+@py2_only
 def test_prepare_metadata_for_build_wheel_with_str(build_backend):
     dist_dir = os.path.abspath(str('pip-dist-info'))
     os.makedirs(dist_dir)
@@ -168,15 +172,67 @@ def test_build_sdist_version_change(build_backend):
     sdist_name = build_backend.build_sdist(sdist_into_directory)
     assert os.path.isfile(os.path.join(sdist_into_directory, sdist_name))
 
-    # if the setup.py changes subsequent call of the build meta should still succeed, given the
+    # if the setup.py changes subsequent call of the build meta
+    # should still succeed, given the
     # sdist_directory the frontend specifies is empty
     with open(os.path.abspath("setup.py"), 'rt') as file_handler:
         content = file_handler.read()
     with open(os.path.abspath("setup.py"), 'wt') as file_handler:
-        file_handler.write(content.replace("version='0.0.0'", "version='0.0.1'"))
+        file_handler.write(
+            content.replace("version='0.0.0'", "version='0.0.1'"))
 
     shutil.rmtree(sdist_into_directory)
     os.makedirs(sdist_into_directory)
 
     sdist_name = build_backend.build_sdist("out_sdist")
-    assert os.path.isfile(os.path.join(os.path.abspath("out_sdist"), sdist_name))
+    assert os.path.isfile(
+        os.path.join(os.path.abspath("out_sdist"), sdist_name))
+
+
+def test_build_sdist_setup_py_exists(tmpdir_cwd):
+    # If build_sdist is called from a script other than setup.py,
+    # ensure setup.py is include
+    build_files(defns[0])
+    targz_path = build_sdist("temp")
+    with tarfile.open(os.path.join("temp", targz_path)) as tar:
+        assert any('setup.py' in name for name in tar.getnames())
+
+
+def test_build_sdist_setup_py_manifest_excluded(tmpdir_cwd):
+    # Ensure that MANIFEST.in can exclude setup.py
+    files = {
+        'setup.py': DALS("""
+    __import__('setuptools').setup(
+        name='foo',
+        version='0.0.0',
+        py_modules=['hello']
+    )"""),
+        'hello.py': '',
+        'MANIFEST.in': DALS("""
+    exclude setup.py
+    """)
+    }
+
+    build_files(files)
+    targz_path = build_sdist("temp")
+    with tarfile.open(os.path.join("temp", targz_path)) as tar:
+        assert not any('setup.py' in name for name in tar.getnames())
+
+
+def test_build_sdist_builds_targz_even_if_zip_indicated(tmpdir_cwd):
+    files = {
+        'setup.py': DALS("""
+            __import__('setuptools').setup(
+                name='foo',
+                version='0.0.0',
+                py_modules=['hello']
+            )"""),
+        'hello.py': '',
+        'setup.cfg': DALS("""
+            [sdist]
+            formats=zip
+            """)
+    }
+
+    build_files(files)
+    build_sdist("temp")
diff --git a/setuptools/tests/test_config.py b/setuptools/tests/test_config.py
index 76759ec5..6b177709 100644
--- a/setuptools/tests/test_config.py
+++ b/setuptools/tests/test_config.py
@@ -1,10 +1,18 @@
+# -*- coding: UTF-8 -*-
+from __future__ import unicode_literals
+
 import contextlib
 import pytest
+
 from distutils.errors import DistutilsOptionError, DistutilsFileError
 from mock import patch
 from setuptools.dist import Distribution, _Distribution
 from setuptools.config import ConfigHandler, read_configuration
+from setuptools.extern.six.moves.configparser import InterpolationMissingOptionError
+from setuptools.tests import is_ascii
 from . import py2_only, py3_only
+from .textwrap import DALS
+
 
 class ErrConfigHandler(ConfigHandler):
     """Erroneous handler. Fails to implement required methods."""
@@ -16,12 +24,12 @@ def make_package_dir(name, base_dir, ns=False):
         dir_package = dir_package.mkdir(dir_name)
     init_file = None
     if not ns:
-      init_file = dir_package.join('__init__.py')
-      init_file.write('')
+        init_file = dir_package.join('__init__.py')
+        init_file.write('')
     return dir_package, init_file
 
 
-def fake_env(tmpdir, setup_cfg, setup_py=None, package_path='fake_package'):
+def fake_env(tmpdir, setup_cfg, setup_py=None, encoding='ascii', package_path='fake_package'):
 
     if setup_py is None:
         setup_py = (
@@ -31,7 +39,7 @@ def fake_env(tmpdir, setup_cfg, setup_py=None, package_path='fake_package'):
 
     tmpdir.join('setup.py').write(setup_py)
     config = tmpdir.join('setup.cfg')
-    config.write(setup_cfg)
+    config.write(setup_cfg.encode(encoding), mode='wb')
 
     package_dir, init_file = make_package_dir(package_path, tmpdir)
 
@@ -146,6 +154,24 @@ class TestMetadata:
             assert metadata.download_url == 'http://test.test.com/test/'
             assert metadata.maintainer_email == 'test@test.com'
 
+    def test_license_cfg(self, tmpdir):
+        fake_env(
+            tmpdir,
+            DALS("""
+            [metadata]
+            name=foo
+            version=0.0.1
+            license=Apache 2.0
+            """)
+        )
+
+        with get_dist(tmpdir) as dist:
+            metadata = dist.metadata
+
+            assert metadata.name == "foo"
+            assert metadata.version == "0.0.1"
+            assert metadata.license == "Apache 2.0"
+
     def test_file_mixed(self, tmpdir):
 
         fake_env(
@@ -288,7 +314,7 @@ class TestMetadata:
         tmpdir.join('fake_package', 'version.txt').write('1.2.3\n4.5.6\n')
         with pytest.raises(DistutilsOptionError):
             with get_dist(tmpdir) as dist:
-                _ = dist.metadata.version
+                dist.metadata.version
 
     def test_version_with_package_dir_simple(self, tmpdir):
 
@@ -391,6 +417,89 @@ class TestMetadata:
         with get_dist(tmpdir) as dist:
             assert set(dist.metadata.classifiers) == expected
 
+    def test_deprecated_config_handlers(self, tmpdir):
+        fake_env(
+            tmpdir,
+            '[metadata]\n'
+            'version = 10.1.1\n'
+            'description = Some description\n'
+            'requires = some, requirement\n'
+        )
+
+        with pytest.deprecated_call():
+            with get_dist(tmpdir) as dist:
+                metadata = dist.metadata
+
+                assert metadata.version == '10.1.1'
+                assert metadata.description == 'Some description'
+                assert metadata.requires == ['some', 'requirement']
+
+    def test_interpolation(self, tmpdir):
+        fake_env(
+            tmpdir,
+            '[metadata]\n'
+            'description = %(message)s\n'
+        )
+        with pytest.raises(InterpolationMissingOptionError):
+            with get_dist(tmpdir):
+                pass
+
+    skip_if_not_ascii = pytest.mark.skipif(not is_ascii, reason='Test not supported with this locale')
+
+    @skip_if_not_ascii
+    def test_non_ascii_1(self, tmpdir):
+        fake_env(
+            tmpdir,
+            '[metadata]\n'
+            'description = éàïôñ\n',
+            encoding='utf-8'
+        )
+        with pytest.raises(UnicodeDecodeError):
+            with get_dist(tmpdir):
+                pass
+
+    def test_non_ascii_2(self, tmpdir):
+        fake_env(
+            tmpdir,
+            '# -*- coding: invalid\n'
+        )
+        with pytest.raises(LookupError):
+            with get_dist(tmpdir):
+                pass
+
+    def test_non_ascii_3(self, tmpdir):
+        fake_env(
+            tmpdir,
+            '\n'
+            '# -*- coding: invalid\n'
+        )
+        with get_dist(tmpdir):
+            pass
+
+    @skip_if_not_ascii
+    def test_non_ascii_4(self, tmpdir):
+        fake_env(
+            tmpdir,
+            '# -*- coding: utf-8\n'
+            '[metadata]\n'
+            'description = éàïôñ\n',
+            encoding='utf-8'
+        )
+        with get_dist(tmpdir) as dist:
+            assert dist.metadata.description == 'éàïôñ'
+
+    @skip_if_not_ascii
+    def test_non_ascii_5(self, tmpdir):
+        fake_env(
+            tmpdir,
+            '# vim: set fileencoding=iso-8859-15 :\n'
+            '[metadata]\n'
+            'description = éàïôñ\n',
+            encoding='iso-8859-15'
+        )
+        with get_dist(tmpdir) as dist:
+            assert dist.metadata.description == 'éàïôñ'
+
 
 class TestOptions:
 
@@ -414,7 +523,7 @@ class TestOptions:
             'tests_require = mock==0.7.2; pytest\n'
             'setup_requires = docutils>=0.3; spack ==1.1, ==1.3; there\n'
             'dependency_links = http://some.com/here/1, '
-                'http://some.com/there/2\n'
+            'http://some.com/there/2\n'
             'python_requires = >=1.0, !=2.8\n'
             'py_modules = module1, module2\n'
         )
@@ -622,7 +731,7 @@ class TestOptions:
         dir_sub_two, _ = make_package_dir('sub_two', dir_package, ns=True)
 
         with get_dist(tmpdir) as dist:
-            assert set(dist.packages) == { 
+            assert set(dist.packages) == {
                 'fake_package', 'fake_package.sub_two', 'fake_package.sub_one'
             }
 
@@ -674,7 +783,7 @@ class TestOptions:
             tmpdir,
             '[options.entry_points]\n'
             'group1 = point1 = pack.module:func, '
-                '.point2 = pack.module2:func_rest [rest]\n'
+            '.point2 = pack.module2:func_rest [rest]\n'
             'group2 = point3 = pack.module:func2\n'
         )
 
@@ -720,7 +829,10 @@ class TestOptions:
             ]
             assert sorted(dist.data_files) == sorted(expected)
 
+
 saved_dist_init = _Distribution.__init__
+
+
 class TestExternalSetters:
     # During creation of the setuptools Distribution() object, we call
     # the init of the parent distutils Distribution object via
diff --git a/setuptools/tests/test_depends.py b/setuptools/tests/test_depends.py
index e0cfa880..bff1dfb1 100644
--- a/setuptools/tests/test_depends.py
+++ b/setuptools/tests/test_depends.py
@@ -5,12 +5,12 @@ from setuptools import depends
 
 class TestGetModuleConstant:
 
-	def test_basic(self):
-		"""
-		Invoke get_module_constant on a module in
-		the test package.
-		"""
-		mod_name = 'setuptools.tests.mod_with_constant'
-		val = depends.get_module_constant(mod_name, 'value')
-		assert val == 'three, sir!'
-		assert 'setuptools.tests.mod_with_constant' not in sys.modules
+    def test_basic(self):
+        """
+        Invoke get_module_constant on a module in
+        the test package.
+        """
+        mod_name = 'setuptools.tests.mod_with_constant'
+        val = depends.get_module_constant(mod_name, 'value')
+        assert val == 'three, sir!'
+        assert 'setuptools.tests.mod_with_constant' not in sys.modules
diff --git a/setuptools/tests/test_dist.py b/setuptools/tests/test_dist.py
index 5162e1c9..390c3dfc 100644
--- a/setuptools/tests/test_dist.py
+++ b/setuptools/tests/test_dist.py
@@ -3,10 +3,11 @@
 from __future__ import unicode_literals
 
 import io
-
+from setuptools.dist import DistDeprecationWarning, _get_unpatched
 from setuptools import Distribution
 from setuptools.extern.six.moves.urllib.request import pathname2url
 from setuptools.extern.six.moves.urllib_parse import urljoin
+from setuptools.extern import six
 
 from .textwrap import DALS
 from .test_easy_install import make_nspkg_sdist
@@ -56,6 +57,125 @@ def test_dist_fetch_build_egg(tmpdir):
     assert [dist.key for dist in resolved_dists if dist] == reqs
 
 
+def test_dist__get_unpatched_deprecated():
+    pytest.warns(DistDeprecationWarning, _get_unpatched, [""])
+
+
+def __read_test_cases():
+    # Metadata version 1.0
+    base_attrs = {
+        "name": "package",
+        "version": "0.0.1",
+        "author": "Foo Bar",
+        "author_email": "foo@bar.net",
+        "long_description": "Long\ndescription",
+        "description": "Short description",
+        "keywords": ["one", "two"]
+    }
+
+    def merge_dicts(d1, d2):
+        d1 = d1.copy()
+        d1.update(d2)
+
+        return d1
+
+    test_cases = [
+        ('Metadata version 1.0', base_attrs.copy()),
+        ('Metadata version 1.1: Provides', merge_dicts(base_attrs, {
+            'provides': ['package']
+        })),
+        ('Metadata version 1.1: Obsoletes', merge_dicts(base_attrs, {
+            'obsoletes': ['foo']
+        })),
+        ('Metadata version 1.1: Classifiers', merge_dicts(base_attrs, {
+            'classifiers': [
+                'Programming Language :: Python :: 3',
+                'Programming Language :: Python :: 3.7',
+                'License :: OSI Approved :: MIT License',
+            ]})),
+        ('Metadata version 1.1: Download URL', merge_dicts(base_attrs, {
+            'download_url': 'https://example.com'
+        })),
+        ('Metadata Version 1.2: Requires-Python', merge_dicts(base_attrs, {
+            'python_requires': '>=3.7'
+        })),
+        pytest.param(
+            'Metadata Version 1.2: Project-Url',
+            merge_dicts(base_attrs, {
+                'project_urls': {
+                    'Foo': 'https://example.bar'
+                }
+            }), marks=pytest.mark.xfail(
+                reason="Issue #1578: project_urls not read"
+            )),
+        ('Metadata Version 2.1: Long Description Content Type',
+         merge_dicts(base_attrs, {
+             'long_description_content_type': 'text/x-rst; charset=UTF-8'
+         })),
+        pytest.param(
+            'Metadata Version 2.1: Provides Extra',
+            merge_dicts(base_attrs, {
+                'provides_extras': ['foo', 'bar']
+            }), marks=pytest.mark.xfail(reason="provides_extras not read")),
+        ('Missing author, missing author e-mail',
+         {'name': 'foo', 'version': '1.0.0'}),
+        ('Missing author',
+         {'name': 'foo',
+          'version': '1.0.0',
+          'author_email': 'snorri@sturluson.name'}),
+        ('Missing author e-mail',
+         {'name': 'foo',
+          'version': '1.0.0',
+          'author': 'Snorri Sturluson'}),
+        ('Missing author',
+         {'name': 'foo',
+          'version': '1.0.0',
+          'author': 'Snorri Sturluson'}),
+    ]
+
+    return test_cases
+
+
+@pytest.mark.parametrize('name,attrs', __read_test_cases())
+def test_read_metadata(name, attrs):
+    dist = Distribution(attrs)
+    metadata_out = dist.metadata
+    dist_class = metadata_out.__class__
+
+    # Write to PKG_INFO and then load into a new metadata object
+    if six.PY2:
+        PKG_INFO = io.BytesIO()
+    else:
+        PKG_INFO = io.StringIO()
+
+    metadata_out.write_pkg_file(PKG_INFO)
+
+    PKG_INFO.seek(0)
+    metadata_in = dist_class()
+    metadata_in.read_pkg_file(PKG_INFO)
+
+    tested_attrs = [
+        ('name', dist_class.get_name),
+        ('version', dist_class.get_version),
+        ('author', dist_class.get_contact),
+        ('author_email', dist_class.get_contact_email),
+        ('metadata_version', dist_class.get_metadata_version),
+        ('provides', dist_class.get_provides),
+        ('description', dist_class.get_description),
+        ('download_url', dist_class.get_download_url),
+        ('keywords', dist_class.get_keywords),
+        ('platforms', dist_class.get_platforms),
+        ('obsoletes', dist_class.get_obsoletes),
+        ('requires', dist_class.get_requires),
+        ('classifiers', dist_class.get_classifiers),
+        ('project_urls', lambda s: getattr(s, 'project_urls', {})),
+        ('provides_extras', lambda s: getattr(s, 'provides_extras', set())),
+    ]
+
+    for attr, getter in tested_attrs:
+        assert getter(metadata_in) == getter(metadata_out)
+
+
 def __maintainer_test_cases():
     attrs = {"name": "package",
              "version": "1.0",
diff --git a/setuptools/tests/test_easy_install.py b/setuptools/tests/test_easy_install.py
index b0cc4c9f..c3fd1c6e 100644
--- a/setuptools/tests/test_easy_install.py
+++ b/setuptools/tests/test_easy_install.py
@@ -15,7 +15,9 @@ import distutils.errors
 import io
 import zipfile
 import mock
-
+from setuptools.command.easy_install import (
+    EasyInstallDeprecationWarning, ScriptWriter, WindowsScriptWriter,
+)
 import time
 from setuptools.extern import six
 from setuptools.extern.six.moves import urllib
@@ -287,6 +289,22 @@ class TestEasyInstallTest:
         cmd.easy_install(sdist_script)
         assert (target / 'mypkg_script').exists()
 
+    def test_dist_get_script_args_deprecated(self):
+        with pytest.warns(EasyInstallDeprecationWarning):
+            ScriptWriter.get_script_args(None, None)
+
+    def test_dist_get_script_header_deprecated(self):
+        with pytest.warns(EasyInstallDeprecationWarning):
+            ScriptWriter.get_script_header("")
+
+    def test_dist_get_writer_deprecated(self):
+        with pytest.warns(EasyInstallDeprecationWarning):
+            ScriptWriter.get_writer(None)
+
+    def test_dist_WindowsScriptWriter_get_writer_deprecated(self):
+        with pytest.warns(EasyInstallDeprecationWarning):
+            WindowsScriptWriter.get_writer()
+
 
 @pytest.mark.filterwarnings('ignore:Unbuilt egg')
 class TestPTHFileWriter:
diff --git a/setuptools/tests/test_egg_info.py b/setuptools/tests/test_egg_info.py
index 7c862e61..db9c3873 100644
--- a/setuptools/tests/test_egg_info.py
+++ b/setuptools/tests/test_egg_info.py
@@ -1,4 +1,3 @@
-import datetime
 import sys
 import ast
 import os
@@ -7,7 +6,9 @@ import re
 import stat
 import time
 
-from setuptools.command.egg_info import egg_info, manifest_maker
+from setuptools.command.egg_info import (
+    egg_info, manifest_maker, EggInfoDeprecationWarning, get_pkg_info_revision,
+)
 from setuptools.dist import Distribution
 from setuptools.extern.six.moves import map
 
@@ -148,6 +149,37 @@ class TestEggInfo:
         ]
         assert sorted(actual) == expected
 
+    def test_license_is_a_string(self, tmpdir_cwd, env):
+        setup_config = DALS("""
+            [metadata]
+            name=foo
+            version=0.0.1
+            license=file:MIT
+            """)
+
+        setup_script = DALS("""
+            from setuptools import setup
+
+            setup()
+            """)
+
+        build_files({'setup.py': setup_script,
+                     'setup.cfg': setup_config})
+
+        # This command should fail with a ValueError, but because it's
+        # currently configured to use a subprocess, the actual traceback
+        # object is lost and we need to parse it from stderr
+        with pytest.raises(AssertionError) as exc:
+            self._run_egg_info_command(tmpdir_cwd, env)
+
+        # Hopefully this is not too fragile: the only argument to the
+        # assertion error should be a traceback, ending with:
+        #     ValueError: ....
+        #
+        #     assert not 1
+        tb = exc.value.args[0].split('\n')
+        assert tb[-3].lstrip().startswith('ValueError')
+
     def test_rebuilt(self, tmpdir_cwd, env):
         """Ensure timestamps are updated when the command is re-run."""
         self._create_project()
@@ -618,6 +650,20 @@ class TestEggInfo:
         for msg in fixtures:
             assert manifest_maker._should_suppress_warning(msg)
 
+    def test_egg_info_includes_setup_py(self, tmpdir_cwd):
+        self._create_project()
+        dist = Distribution({"name": "foo", "version": "0.0.1"})
+        dist.script_name = "non_setup.py"
+        egg_info_instance = egg_info(dist)
+        egg_info_instance.finalize_options()
+        egg_info_instance.run()
+
+        assert 'setup.py' in egg_info_instance.filelist.files
+
+        with open(egg_info_instance.egg_info + "/SOURCES.txt") as f:
+            sources = f.read().split('\n')
+            assert 'setup.py' in sources
+
     def _run_egg_info_command(self, tmpdir_cwd, env, cmd=None, output=None):
         environ = os.environ.copy().update(
             HOME=env.paths['home'],
@@ -632,8 +678,8 @@ class TestEggInfo:
             data_stream=1,
             env=environ,
         )
-        if code:
-            raise AssertionError(data)
+        assert not code, data
+
         if output:
             assert output in data
 
@@ -652,3 +698,52 @@ class TestEggInfo:
         with open(os.path.join(egg_info_dir, 'PKG-INFO')) as pkginfo_file:
             pkg_info_lines = pkginfo_file.read().split('\n')
         assert 'Version: 0.0.0.dev0' in pkg_info_lines
+
+    def test_get_pkg_info_revision_deprecated(self):
+        pytest.warns(EggInfoDeprecationWarning, get_pkg_info_revision)
+
+    EGG_INFO_TESTS = (
+        # Check for issue #1136: invalid string type when
+        # reading declarative `setup.cfg` under Python 2.
+        {
+            'setup.py': DALS(
+                """
+                from setuptools import setup
+                setup(
+                    name="foo",
+                )
+                """),
+            'setup.cfg': DALS(
+                """
+                [options]
+                package_dir =
+                    = src
+                """),
+            'src': {},
+        },
+        # Check Unicode can be used in `setup.py` under Python 2.
+        {
+            'setup.py': DALS(
+                """
+                # -*- coding: utf-8 -*-
+                from __future__ import unicode_literals
+                from setuptools import setup, find_packages
+                setup(
+                    name="foo",
+                    package_dir={'': 'src'},
+                )
+                """),
+            'src': {},
+        }
+    )
+
+    @pytest.mark.parametrize('package_files', EGG_INFO_TESTS)
+    def test_egg_info(self, tmpdir_cwd, env, package_files):
+        """
+        """
+        build_files(package_files)
+        code, data = environment.run_setup_py(
+            cmd=['egg_info'],
+            data_stream=1,
+        )
+        assert not code, data
diff --git a/setuptools/tests/test_find_packages.py b/setuptools/tests/test_find_packages.py
index b08f91c7..ab26b4f1 100644
--- a/setuptools/tests/test_find_packages.py
+++ b/setuptools/tests/test_find_packages.py
@@ -12,10 +12,10 @@ from . import py3_only
 from setuptools.extern.six import PY3
 from setuptools import find_packages
 if PY3:
-  from setuptools import find_namespace_packages
+    from setuptools import find_namespace_packages
 
-# modeled after CPython's test.support.can_symlink
 
+# modeled after CPython's test.support.can_symlink
 def can_symlink():
     TESTFN = tempfile.mktemp()
     symlink_path = TESTFN + "can_symlink"
@@ -164,12 +164,14 @@ class TestFindPackages:
     def test_pep420_ns_package_no_includes(self):
         packages = find_namespace_packages(
             self.dist_dir, exclude=['pkg.subpkg.assets'])
-        self._assert_packages(packages, ['docs', 'pkg', 'pkg.nspkg', 'pkg.subpkg'])
+        self._assert_packages(
+            packages, ['docs', 'pkg', 'pkg.nspkg', 'pkg.subpkg'])
 
     @py3_only
     def test_pep420_ns_package_no_includes_or_excludes(self):
         packages = find_namespace_packages(self.dist_dir)
-        expected = ['docs', 'pkg', 'pkg.nspkg', 'pkg.subpkg', 'pkg.subpkg.assets']
+        expected = [
+            'docs', 'pkg', 'pkg.nspkg', 'pkg.subpkg', 'pkg.subpkg.assets']
         self._assert_packages(packages, expected)
 
     @py3_only
@@ -185,4 +187,3 @@ class TestFindPackages:
         shutil.rmtree(os.path.join(self.dist_dir, 'pkg/subpkg/assets'))
         packages = find_namespace_packages(self.dist_dir)
         self._assert_packages(packages, ['pkg', 'pkg.nspkg', 'pkg.subpkg'])
-
diff --git a/setuptools/tests/test_install_scripts.py b/setuptools/tests/test_install_scripts.py
index 727ad65b..4338c792 100644
--- a/setuptools/tests/test_install_scripts.py
+++ b/setuptools/tests/test_install_scripts.py
@@ -64,7 +64,8 @@ class TestInstallScripts:
     @pytest.mark.skipif(sys.platform == 'win32', reason='non-Windows only')
     def test_executable_with_spaces_escaping_unix(self, tmpdir):
         """
-        Ensure that shebang on Unix is not quoted, even when a value with spaces
+        Ensure that shebang on Unix is not quoted, even when
+        a value with spaces
         is specified using --executable.
         """
         expected = '#!%s\n' % self.unix_spaces_exe
@@ -77,7 +78,8 @@ class TestInstallScripts:
     @pytest.mark.skipif(sys.platform != 'win32', reason='Windows only')
     def test_executable_arg_escaping_win32(self, tmpdir):
         """
-        Ensure that shebang on Windows is quoted when getting a path with spaces
+        Ensure that shebang on Windows is quoted when
+        getting a path with spaces
         from --executable, that is itself properly quoted.
         """
         expected = '#!"%s"\n' % self.win32_exe
diff --git a/setuptools/tests/test_integration.py b/setuptools/tests/test_integration.py
index 3a9a6c50..e54f3209 100644
--- a/setuptools/tests/test_integration.py
+++ b/setuptools/tests/test_integration.py
@@ -6,6 +6,11 @@ Try to install a few packages.
 import glob
 import os
 import sys
+import re
+import subprocess
+import functools
+import tarfile
+import zipfile
 
 from setuptools.extern.six.moves import urllib
 import pytest
@@ -114,15 +119,12 @@ def test_pyuri(install_context):
     assert os.path.exists(os.path.join(pyuri.location, 'pyuri', 'uri.regex'))
 
 
-import re
-import subprocess
-import functools
-import tarfile, zipfile
+build_deps = ['appdirs', 'packaging', 'pyparsing', 'six']
 
 
-build_deps = ['appdirs', 'packaging', 'pyparsing', 'six']
 @pytest.mark.parametrize("build_dep", build_deps)
-@pytest.mark.skipif(sys.version_info < (3, 6), reason='run only on late versions')
+@pytest.mark.skipif(
+    sys.version_info < (3, 6), reason='run only on late versions')
 def test_build_deps_on_distutils(request, tmpdir_factory, build_dep):
     """
     All setuptools build dependencies must build without
@@ -149,13 +151,16 @@ def install(pkg_dir, install_dir):
         breaker.write('raise ImportError()')
     cmd = [sys.executable, 'setup.py', 'install', '--prefix', install_dir]
     env = dict(os.environ, PYTHONPATH=pkg_dir)
-    output = subprocess.check_output(cmd, cwd=pkg_dir, env=env, stderr=subprocess.STDOUT)
+    output = subprocess.check_output(
+        cmd, cwd=pkg_dir, env=env, stderr=subprocess.STDOUT)
     return output.decode('utf-8')
 
 
 def download_and_extract(request, req, target):
-    cmd = [sys.executable, '-m', 'pip', 'download', '--no-deps',
-        '--no-binary', ':all:', req]
+    cmd = [
+        sys.executable, '-m', 'pip', 'download', '--no-deps',
+        '--no-binary', ':all:', req,
+    ]
     output = subprocess.check_output(cmd, encoding='utf-8')
     filename = re.search('Saved (.*)', output).group(1)
     request.addfinalizer(functools.partial(os.remove, filename))
diff --git a/setuptools/tests/test_manifest.py b/setuptools/tests/test_manifest.py
index c9533dda..2a0e9c86 100644
--- a/setuptools/tests/test_manifest.py
+++ b/setuptools/tests/test_manifest.py
@@ -20,8 +20,6 @@ import pytest
 
 __metaclass__ = type
 
-py3_only = pytest.mark.xfail(six.PY2, reason="Test runs on Python 3 only")
-
 
 def make_local_path(s):
     """Converts '/' in a string to os.sep"""
@@ -75,7 +73,9 @@ translate_specs = [
 
     # Glob matching
     ('*.txt', ['foo.txt', 'bar.txt'], ['foo/foo.txt']),
-    ('dir/*.txt', ['dir/foo.txt', 'dir/bar.txt', 'dir/.txt'], ['notdir/foo.txt']),
+    (
+        'dir/*.txt',
+        ['dir/foo.txt', 'dir/bar.txt', 'dir/.txt'], ['notdir/foo.txt']),
     ('*/*.py', ['bin/start.py'], []),
     ('docs/page-?.txt', ['docs/page-9.txt'], ['docs/page-10.txt']),
 
@@ -244,77 +244,77 @@ class TestManifestTest(TempDirTestCase):
 
     def test_exclude(self):
         """Include everything in app/ except the text files"""
-        l = make_local_path
+        ml = make_local_path
         self.make_manifest(
             """
             include app/*
             exclude app/*.txt
             """)
-        files = default_files | set([l('app/c.rst')])
+        files = default_files | set([ml('app/c.rst')])
         assert files == self.get_files()
 
     def test_include_multiple(self):
         """Include with multiple patterns."""
-        l = make_local_path
+        ml = make_local_path
         self.make_manifest("include app/*.txt app/static/*")
         files = default_files | set([
-            l('app/a.txt'), l('app/b.txt'),
-            l('app/static/app.js'), l('app/static/app.js.map'),
-            l('app/static/app.css'), l('app/static/app.css.map')])
+            ml('app/a.txt'), ml('app/b.txt'),
+            ml('app/static/app.js'), ml('app/static/app.js.map'),
+            ml('app/static/app.css'), ml('app/static/app.css.map')])
         assert files == self.get_files()
 
     def test_graft(self):
         """Include the whole app/static/ directory."""
-        l = make_local_path
+        ml = make_local_path
         self.make_manifest("graft app/static")
         files = default_files | set([
-            l('app/static/app.js'), l('app/static/app.js.map'),
-            l('app/static/app.css'), l('app/static/app.css.map')])
+            ml('app/static/app.js'), ml('app/static/app.js.map'),
+            ml('app/static/app.css'), ml('app/static/app.css.map')])
         assert files == self.get_files()
 
     def test_graft_glob_syntax(self):
         """Include the whole app/static/ directory."""
-        l = make_local_path
+        ml = make_local_path
         self.make_manifest("graft */static")
         files = default_files | set([
-            l('app/static/app.js'), l('app/static/app.js.map'),
-            l('app/static/app.css'), l('app/static/app.css.map')])
+            ml('app/static/app.js'), ml('app/static/app.js.map'),
+            ml('app/static/app.css'), ml('app/static/app.css.map')])
         assert files == self.get_files()
 
     def test_graft_global_exclude(self):
         """Exclude all *.map files in the project."""
-        l = make_local_path
+        ml = make_local_path
         self.make_manifest(
             """
             graft app/static
             global-exclude *.map
             """)
         files = default_files | set([
-            l('app/static/app.js'), l('app/static/app.css')])
+            ml('app/static/app.js'), ml('app/static/app.css')])
         assert files == self.get_files()
 
     def test_global_include(self):
         """Include all *.rst, *.js, and *.css files in the whole tree."""
-        l = make_local_path
+        ml = make_local_path
         self.make_manifest(
             """
             global-include *.rst *.js *.css
             """)
         files = default_files | set([
-            '.hidden.rst', 'testing.rst', l('app/c.rst'),
-            l('app/static/app.js'), l('app/static/app.css')])
+            '.hidden.rst', 'testing.rst', ml('app/c.rst'),
+            ml('app/static/app.js'), ml('app/static/app.css')])
         assert files == self.get_files()
 
     def test_graft_prune(self):
         """Include all files in app/, except for the whole app/static/ dir."""
-        l = make_local_path
+        ml = make_local_path
         self.make_manifest(
             """
             graft app
             prune app/static
             """)
         files = default_files | set([
-            l('app/a.txt'), l('app/b.txt'), l('app/c.rst')])
+            ml('app/a.txt'), ml('app/b.txt'), ml('app/c.rst')])
         assert files == self.get_files()
 
 
@@ -370,7 +370,7 @@ class TestFileListTest(TempDirTestCase):
     def test_process_template_line(self):
         # testing  all MANIFEST.in template patterns
         file_list = FileList()
-        l = make_local_path
+        ml = make_local_path
 
         # simulated file list
         self.make_files([
@@ -378,16 +378,16 @@ class TestFileListTest(TempDirTestCase):
             'buildout.cfg',
             # filelist does not filter out VCS directories,
             # it's sdist that does
-            l('.hg/last-message.txt'),
-            l('global/one.txt'),
-            l('global/two.txt'),
-            l('global/files.x'),
-            l('global/here.tmp'),
-            l('f/o/f.oo'),
-            l('dir/graft-one'),
-            l('dir/dir2/graft2'),
-            l('dir3/ok'),
-            l('dir3/sub/ok.txt'),
+            ml('.hg/last-message.txt'),
+            ml('global/one.txt'),
+            ml('global/two.txt'),
+            ml('global/files.x'),
+            ml('global/here.tmp'),
+            ml('f/o/f.oo'),
+            ml('dir/graft-one'),
+            ml('dir/dir2/graft2'),
+            ml('dir3/ok'),
+            ml('dir3/sub/ok.txt'),
         ])
 
         MANIFEST_IN = DALS("""\
@@ -414,12 +414,12 @@ class TestFileListTest(TempDirTestCase):
             'buildout.cfg',
             'four.txt',
             'ok',
-            l('.hg/last-message.txt'),
-            l('dir/graft-one'),
-            l('dir/dir2/graft2'),
-            l('f/o/f.oo'),
-            l('global/one.txt'),
-            l('global/two.txt'),
+            ml('.hg/last-message.txt'),
+            ml('dir/graft-one'),
+            ml('dir/dir2/graft2'),
+            ml('f/o/f.oo'),
+            ml('global/one.txt'),
+            ml('global/two.txt'),
         ]
 
         file_list.sort()
@@ -476,10 +476,10 @@ class TestFileListTest(TempDirTestCase):
                 assert False, "Should have thrown an error"
 
     def test_include(self):
-        l = make_local_path
+        ml = make_local_path
         # include
         file_list = FileList()
-        self.make_files(['a.py', 'b.txt', l('d/c.py')])
+        self.make_files(['a.py', 'b.txt', ml('d/c.py')])
 
         file_list.process_template_line('include *.py')
         file_list.sort()
@@ -492,42 +492,42 @@ class TestFileListTest(TempDirTestCase):
         self.assertWarnings()
 
     def test_exclude(self):
-        l = make_local_path
+        ml = make_local_path
         # exclude
         file_list = FileList()
-        file_list.files = ['a.py', 'b.txt', l('d/c.py')]
+        file_list.files = ['a.py', 'b.txt', ml('d/c.py')]
 
         file_list.process_template_line('exclude *.py')
         file_list.sort()
-        assert file_list.files == ['b.txt', l('d/c.py')]
+        assert file_list.files == ['b.txt', ml('d/c.py')]
         self.assertNoWarnings()
 
         file_list.process_template_line('exclude *.rb')
         file_list.sort()
-        assert file_list.files == ['b.txt', l('d/c.py')]
+        assert file_list.files == ['b.txt', ml('d/c.py')]
         self.assertWarnings()
 
     def test_global_include(self):
-        l = make_local_path
+        ml = make_local_path
         # global-include
         file_list = FileList()
-        self.make_files(['a.py', 'b.txt', l('d/c.py')])
+        self.make_files(['a.py', 'b.txt', ml('d/c.py')])
 
         file_list.process_template_line('global-include *.py')
         file_list.sort()
-        assert file_list.files == ['a.py', l('d/c.py')]
+        assert file_list.files == ['a.py', ml('d/c.py')]
         self.assertNoWarnings()
 
         file_list.process_template_line('global-include *.rb')
         file_list.sort()
-        assert file_list.files == ['a.py', l('d/c.py')]
+        assert file_list.files == ['a.py', ml('d/c.py')]
         self.assertWarnings()
 
     def test_global_exclude(self):
-        l = make_local_path
+        ml = make_local_path
         # global-exclude
         file_list = FileList()
-        file_list.files = ['a.py', 'b.txt', l('d/c.py')]
+        file_list.files = ['a.py', 'b.txt', ml('d/c.py')]
 
         file_list.process_template_line('global-exclude *.py')
         file_list.sort()
@@ -540,65 +540,65 @@ class TestFileListTest(TempDirTestCase):
         self.assertWarnings()
 
     def test_recursive_include(self):
-        l = make_local_path
+        ml = make_local_path
         # recursive-include
         file_list = FileList()
-        self.make_files(['a.py', l('d/b.py'), l('d/c.txt'), l('d/d/e.py')])
+        self.make_files(['a.py', ml('d/b.py'), ml('d/c.txt'), ml('d/d/e.py')])
 
         file_list.process_template_line('recursive-include d *.py')
         file_list.sort()
-        assert file_list.files == [l('d/b.py'), l('d/d/e.py')]
+        assert file_list.files == [ml('d/b.py'), ml('d/d/e.py')]
         self.assertNoWarnings()
 
         file_list.process_template_line('recursive-include e *.py')
         file_list.sort()
-        assert file_list.files == [l('d/b.py'), l('d/d/e.py')]
+        assert file_list.files == [ml('d/b.py'), ml('d/d/e.py')]
         self.assertWarnings()
 
     def test_recursive_exclude(self):
-        l = make_local_path
+        ml = make_local_path
         # recursive-exclude
         file_list = FileList()
-        file_list.files = ['a.py', l('d/b.py'), l('d/c.txt'), l('d/d/e.py')]
+        file_list.files = ['a.py', ml('d/b.py'), ml('d/c.txt'), ml('d/d/e.py')]
 
         file_list.process_template_line('recursive-exclude d *.py')
         file_list.sort()
-        assert file_list.files == ['a.py', l('d/c.txt')]
+        assert file_list.files == ['a.py', ml('d/c.txt')]
         self.assertNoWarnings()
 
         file_list.process_template_line('recursive-exclude e *.py')
         file_list.sort()
-        assert file_list.files == ['a.py', l('d/c.txt')]
+        assert file_list.files == ['a.py', ml('d/c.txt')]
         self.assertWarnings()
 
     def test_graft(self):
-        l = make_local_path
+        ml = make_local_path
         # graft
         file_list = FileList()
-        self.make_files(['a.py', l('d/b.py'), l('d/d/e.py'), l('f/f.py')])
+        self.make_files(['a.py', ml('d/b.py'), ml('d/d/e.py'), ml('f/f.py')])
 
         file_list.process_template_line('graft d')
         file_list.sort()
-        assert file_list.files == [l('d/b.py'), l('d/d/e.py')]
+        assert file_list.files == [ml('d/b.py'), ml('d/d/e.py')]
         self.assertNoWarnings()
 
         file_list.process_template_line('graft e')
         file_list.sort()
-        assert file_list.files == [l('d/b.py'), l('d/d/e.py')]
+        assert file_list.files == [ml('d/b.py'), ml('d/d/e.py')]
         self.assertWarnings()
 
     def test_prune(self):
-        l = make_local_path
+        ml = make_local_path
         # prune
         file_list = FileList()
-        file_list.files = ['a.py', l('d/b.py'), l('d/d/e.py'), l('f/f.py')]
+        file_list.files = ['a.py', ml('d/b.py'), ml('d/d/e.py'), ml('f/f.py')]
 
         file_list.process_template_line('prune d')
         file_list.sort()
-        assert file_list.files == ['a.py', l('f/f.py')]
+        assert file_list.files == ['a.py', ml('f/f.py')]
         self.assertNoWarnings()
 
         file_list.process_template_line('prune e')
         file_list.sort()
-        assert file_list.files == ['a.py', l('f/f.py')]
+        assert file_list.files == ['a.py', ml('f/f.py')]
         self.assertWarnings()
diff --git a/setuptools/tests/test_msvc.py b/setuptools/tests/test_msvc.py
index 32d7a907..24e38ea8 100644
--- a/setuptools/tests/test_msvc.py
+++ b/setuptools/tests/test_msvc.py
@@ -49,7 +49,8 @@ def mock_reg(hkcu=None, hklm=None):
             for k in hive if k.startswith(key.lower())
         )
 
-    return mock.patch.multiple(distutils.msvc9compiler.Reg,
+    return mock.patch.multiple(
+        distutils.msvc9compiler.Reg,
         read_keys=read_keys, read_values=read_values)
 
 
@@ -61,7 +62,7 @@ class TestModulePatch:
     """
 
     key_32 = r'software\microsoft\devdiv\vcforpython\9.0\installdir'
-    key_64 = r'software\wow6432node\microsoft\devdiv\vcforpython\9.0\installdir'
+    key_64 = key_32.replace(r'\microsoft', r'\wow6432node\microsoft')
 
     def test_patched(self):
         "Test the module is actually patched"
diff --git a/setuptools/tests/test_namespaces.py b/setuptools/tests/test_namespaces.py
index da19bd79..f937d981 100644
--- a/setuptools/tests/test_namespaces.py
+++ b/setuptools/tests/test_namespaces.py
@@ -1,6 +1,5 @@
 from __future__ import absolute_import, unicode_literals
 
-import os
 import sys
 import subprocess
 
@@ -12,7 +11,7 @@ from setuptools.command import test
 
 class TestNamespaces:
 
-    @pytest.mark.xfail(
+    @pytest.mark.skipif(
         sys.version_info < (3, 5),
         reason="Requires importlib.util.module_from_spec",
     )
diff --git a/setuptools/tests/test_packageindex.py b/setuptools/tests/test_packageindex.py
index 63b92946..ab371884 100644
--- a/setuptools/tests/test_packageindex.py
+++ b/setuptools/tests/test_packageindex.py
@@ -6,6 +6,8 @@ import distutils.errors
 
 from setuptools.extern import six
 from setuptools.extern.six.moves import urllib, http_client
+import mock
+import pytest
 
 import pkg_resources
 import setuptools.package_index
@@ -42,7 +44,10 @@ class TestPackageIndex:
             hosts=('www.example.com',)
         )
 
-        url = 'url:%20https://svn.plone.org/svn/collective/inquant.contentmirror.plone/trunk'
+        url = (
+            'url:%20https://svn.plone.org/svn'
+            '/collective/inquant.contentmirror.plone/trunk'
+        )
         try:
             v = index.open_url(url)
         except Exception as v:
@@ -61,9 +66,9 @@ class TestPackageIndex:
         index.opener = _urlopen
         url = 'http://example.com'
         try:
-            v = index.open_url(url)
-        except Exception as v:
-            assert 'line' in str(v)
+            index.open_url(url)
+        except Exception as exc:
+            assert 'line' in str(exc)
         else:
             raise AssertionError('Should have raise here!')
 
@@ -81,7 +86,11 @@ class TestPackageIndex:
             index.open_url(url)
         except distutils.errors.DistutilsError as error:
             msg = six.text_type(error)
-            assert 'nonnumeric port' in msg or 'getaddrinfo failed' in msg or 'Name or service not known' in msg
+            assert (
+                'nonnumeric port' in msg
+                or 'getaddrinfo failed' in msg
+                or 'Name or service not known' in msg
+            )
             return
         raise RuntimeError("Did not raise")
 
@@ -223,6 +232,61 @@ class TestPackageIndex:
             assert dists[0].version == ''
             assert dists[1].version == vc
 
+    def test_download_git_with_rev(self, tmpdir):
+        url = 'git+https://github.example/group/project@master#egg=foo'
+        index = setuptools.package_index.PackageIndex()
+
+        with mock.patch("os.system") as os_system_mock:
+            result = index.download(url, str(tmpdir))
+
+        os_system_mock.assert_called()
+
+        expected_dir = str(tmpdir / 'project@master')
+        expected = (
+            'git clone --quiet '
+            'https://github.example/group/project {expected_dir}'
+        ).format(**locals())
+        first_call_args = os_system_mock.call_args_list[0][0]
+        assert first_call_args == (expected,)
+
+        tmpl = '(cd {expected_dir} && git checkout --quiet master)'
+        expected = tmpl.format(**locals())
+        assert os_system_mock.call_args_list[1][0] == (expected,)
+        assert result == expected_dir
+
+    def test_download_git_no_rev(self, tmpdir):
+        url = 'git+https://github.example/group/project#egg=foo'
+        index = setuptools.package_index.PackageIndex()
+
+        with mock.patch("os.system") as os_system_mock:
+            result = index.download(url, str(tmpdir))
+
+        os_system_mock.assert_called()
+
+        expected_dir = str(tmpdir / 'project')
+        expected = (
+            'git clone --quiet '
+            'https://github.example/group/project {expected_dir}'
+        ).format(**locals())
+        os_system_mock.assert_called_once_with(expected)
+
+    def test_download_svn(self, tmpdir):
+        url = 'svn+https://svn.example/project#egg=foo'
+        index = setuptools.package_index.PackageIndex()
+
+        with pytest.warns(UserWarning):
+            with mock.patch("os.system") as os_system_mock:
+                result = index.download(url, str(tmpdir))
+
+        os_system_mock.assert_called()
+
+        expected_dir = str(tmpdir / 'project')
+        expected = (
+            'svn checkout -q '
+            'svn+https://svn.example/project {expected_dir}'
+        ).format(**locals())
+        os_system_mock.assert_called_once_with(expected)
+
 
 class TestContentCheckers:
     def test_md5(self):
diff --git a/setuptools/tests/test_pep425tags.py b/setuptools/tests/test_pep425tags.py
index f558a0d8..30afdec7 100644
--- a/setuptools/tests/test_pep425tags.py
+++ b/setuptools/tests/test_pep425tags.py
@@ -32,7 +32,9 @@ class TestPEP425Tags:
         if sys.version_info < (3, 3):
             config_vars.update({'Py_UNICODE_SIZE': 2})
             mock_gcf = self.mock_get_config_var(**config_vars)
-            with patch('setuptools.pep425tags.sysconfig.get_config_var', mock_gcf):
+            with patch(
+                    'setuptools.pep425tags.sysconfig.get_config_var',
+                    mock_gcf):
                 abi_tag = pep425tags.get_abi_tag()
                 assert abi_tag == base + flags
 
diff --git a/setuptools/tests/test_sandbox.py b/setuptools/tests/test_sandbox.py
index d8675422..99398cdb 100644
--- a/setuptools/tests/test_sandbox.py
+++ b/setuptools/tests/test_sandbox.py
@@ -26,7 +26,8 @@ class TestSandbox:
         """
         It should be possible to execute a setup.py with a Byte Order Mark
         """
-        target = pkg_resources.resource_filename(__name__,
+        target = pkg_resources.resource_filename(
+            __name__,
             'script-with-bom.py')
         namespace = types.ModuleType('namespace')
         setuptools.sandbox._execfile(target, vars(namespace))
diff --git a/setuptools/tests/test_sdist.py b/setuptools/tests/test_sdist.py
index 02222da5..d2c4e0cf 100644
--- a/setuptools/tests/test_sdist.py
+++ b/setuptools/tests/test_sdist.py
@@ -20,8 +20,8 @@ from setuptools.command.egg_info import manifest_maker
 from setuptools.dist import Distribution
 from setuptools.tests import fail_on_ascii
 from .text import Filenames
+from . import py3_only
 
-py3_only = pytest.mark.xfail(six.PY2, reason="Test runs on Python 3 only")
 
 SETUP_ATTRS = {
     'name': 'sdist_test',
@@ -92,9 +92,8 @@ fail_on_latin1_encoded_filenames = pytest.mark.xfail(
 class TestSdistTest:
     def setup_method(self, method):
         self.temp_dir = tempfile.mkdtemp()
-        f = open(os.path.join(self.temp_dir, 'setup.py'), 'w')
-        f.write(SETUP_PY)
-        f.close()
+        with open(os.path.join(self.temp_dir, 'setup.py'), 'w') as f:
+            f.write(SETUP_PY)
 
         # Set up the rest of the test package
         test_pkg = os.path.join(self.temp_dir, 'sdist_test')
@@ -135,6 +134,47 @@ class TestSdistTest:
         assert os.path.join('sdist_test', 'c.rst') not in manifest
         assert os.path.join('d', 'e.dat') in manifest
 
+    def test_setup_py_exists(self):
+        dist = Distribution(SETUP_ATTRS)
+        dist.script_name = 'foo.py'
+        cmd = sdist(dist)
+        cmd.ensure_finalized()
+
+        with quiet():
+            cmd.run()
+
+        manifest = cmd.filelist.files
+        assert 'setup.py' in manifest
+
+    def test_setup_py_missing(self):
+        dist = Distribution(SETUP_ATTRS)
+        dist.script_name = 'foo.py'
+        cmd = sdist(dist)
+        cmd.ensure_finalized()
+
+        if os.path.exists("setup.py"):
+            os.remove("setup.py")
+        with quiet():
+            cmd.run()
+
+        manifest = cmd.filelist.files
+        assert 'setup.py' not in manifest
+
+    def test_setup_py_excluded(self):
+        with open("MANIFEST.in", "w") as manifest_file:
+            manifest_file.write("exclude setup.py")
+
+        dist = Distribution(SETUP_ATTRS)
+        dist.script_name = 'foo.py'
+        cmd = sdist(dist)
+        cmd.ensure_finalized()
+
+        with quiet():
+            cmd.run()
+
+        manifest = cmd.filelist.files
+        assert 'setup.py' not in manifest
+
     def test_defaults_case_sensitivity(self):
         """
         Make sure default files (README.*, etc.) are added in a case-sensitive
diff --git a/setuptools/tests/test_setuptools.py b/setuptools/tests/test_setuptools.py
index 7aae3a16..5896a69a 100644
--- a/setuptools/tests/test_setuptools.py
+++ b/setuptools/tests/test_setuptools.py
@@ -77,7 +77,8 @@ class TestDepends:
         from json import __version__
         assert dep.get_module_constant('json', '__version__') == __version__
         assert dep.get_module_constant('sys', 'version') == sys.version
-        assert dep.get_module_constant('setuptools.tests.test_setuptools', '__doc__') == __doc__
+        assert dep.get_module_constant(
+            'setuptools.tests.test_setuptools', '__doc__') == __doc__
 
     @needs_bytecode
     def testRequire(self):
@@ -216,7 +217,8 @@ class TestFeatures:
         self.req = Require('Distutils', '1.0.3', 'distutils')
         self.dist = makeSetup(
             features={
-                'foo': Feature("foo", standard=True, require_features=['baz', self.req]),
+                'foo': Feature(
+                    "foo", standard=True, require_features=['baz', self.req]),
                 'bar': Feature("bar", standard=True, packages=['pkg.bar'],
                                py_modules=['bar_et'], remove=['bar.ext'],
                                ),
@@ -252,7 +254,8 @@ class TestFeatures:
             ('with-dwim', None, 'include DWIM') in dist.feature_options
         )
         assert (
-            ('without-dwim', None, 'exclude DWIM (default)') in dist.feature_options
+            ('without-dwim', None, 'exclude DWIM (default)')
+            in dist.feature_options
         )
         assert (
             ('with-bar', None, 'include bar (default)') in dist.feature_options
diff --git a/setuptools/tests/test_test.py b/setuptools/tests/test_test.py
index 960527bc..faaa6ba9 100644
--- a/setuptools/tests/test_test.py
+++ b/setuptools/tests/test_test.py
@@ -4,7 +4,6 @@ from __future__ import unicode_literals
 
 from distutils import log
 import os
-import sys
 
 import pytest
 
@@ -93,10 +92,6 @@ def test_test(capfd):
     assert out == 'Foo\n'
 
 
-@pytest.mark.xfail(
-    sys.version_info < (2, 7),
-    reason="No discover support for unittest on Python 2.6",
-)
 @pytest.mark.usefixtures('tmpdir_cwd', 'quiet_log')
 def test_tests_are_run_once(capfd):
     params = dict(
diff --git a/setuptools/tests/test_upload.py b/setuptools/tests/test_upload.py
index 95a8d16b..320c6959 100644
--- a/setuptools/tests/test_upload.py
+++ b/setuptools/tests/test_upload.py
@@ -1,13 +1,100 @@
 import mock
+import os
+import re
+
 from distutils import log
+from distutils.errors import DistutilsError
 
 import pytest
 
 from setuptools.command.upload import upload
 from setuptools.dist import Distribution
+from setuptools.extern import six
+
+
+def _parse_upload_body(body):
+    boundary = u'\r\n----------------GHSKFJDLGDS7543FJKLFHRE75642756743254'
+    entries = []
+    name_re = re.compile(u'^Content-Disposition: form-data; name="([^\"]+)"')
+
+    for entry in body.split(boundary):
+        pair = entry.split(u'\r\n\r\n')
+        if not len(pair) == 2:
+            continue
+
+        key, value = map(six.text_type.strip, pair)
+        m = name_re.match(key)
+        if m is not None:
+            key = m.group(1)
+
+        entries.append((key, value))
+
+    return entries
+
+
+@pytest.fixture
+def patched_upload(tmpdir):
+    class Fix:
+        def __init__(self, cmd, urlopen):
+            self.cmd = cmd
+            self.urlopen = urlopen
+
+        def __iter__(self):
+            return iter((self.cmd, self.urlopen))
+
+        def get_uploaded_metadata(self):
+            request = self.urlopen.call_args_list[0][0][0]
+            body = request.data.decode('utf-8')
+            entries = dict(_parse_upload_body(body))
+
+            return entries
+
+    class ResponseMock(mock.Mock):
+        def getheader(self, name, default=None):
+            """Mocked getheader method for response object"""
+            return {
+                'content-type': 'text/plain; charset=utf-8',
+            }.get(name.lower(), default)
+
+    with mock.patch('setuptools.command.upload.urlopen') as urlopen:
+        urlopen.return_value = ResponseMock()
+        urlopen.return_value.getcode.return_value = 200
+        urlopen.return_value.read.return_value = b''
+
+        content = os.path.join(str(tmpdir), "content_data")
+
+        with open(content, 'w') as f:
+            f.write("Some content")
+
+        dist = Distribution()
+        dist.dist_files = [('sdist', '3.7.0', content)]
+
+        cmd = upload(dist)
+        cmd.announce = mock.Mock()
+        cmd.username = 'user'
+        cmd.password = 'hunter2'
+
+        yield Fix(cmd, urlopen)
 
 
 class TestUploadTest:
+    def test_upload_metadata(self, patched_upload):
+        cmd, patch = patched_upload
+
+        # Set the metadata version to 2.1
+        cmd.distribution.metadata.metadata_version = '2.1'
+
+        # Run the command
+        cmd.ensure_finalized()
+        cmd.run()
+
+        # Make sure we did the upload
+        patch.assert_called_once()
+
+        # Make sure the metadata version is correct in the headers
+        entries = patched_upload.get_uploaded_metadata()
+        assert entries['metadata_version'] == '2.1'
+
     def test_warns_deprecation(self):
         dist = Distribution()
         dist.dist_files = [(mock.Mock(), mock.Mock(), mock.Mock())]
@@ -41,3 +128,86 @@ class TestUploadTest:
             "upload instead (https://pypi.org/p/twine/)",
             log.WARN
         )
+
+    @pytest.mark.parametrize('url', [
+        'https://example.com/a;parameter',    # Has parameters
+        'https://example.com/a?query',        # Has query
+        'https://example.com/a#fragment',     # Has fragment
+        'ftp://example.com',                  # Invalid scheme
+
+    ])
+    def test_upload_file_invalid_url(self, url, patched_upload):
+        patched_upload.urlopen.side_effect = Exception("Should not be reached")
+
+        cmd = patched_upload.cmd
+        cmd.repository = url
+
+        cmd.ensure_finalized()
+        with pytest.raises(AssertionError):
+            cmd.run()
+
+    def test_upload_file_http_error(self, patched_upload):
+        patched_upload.urlopen.side_effect = six.moves.urllib.error.HTTPError(
+            'https://example.com',
+            404,
+            'File not found',
+            None,
+            None
+        )
+
+        cmd = patched_upload.cmd
+        cmd.ensure_finalized()
+
+        with pytest.raises(DistutilsError):
+            cmd.run()
+
+        cmd.announce.assert_any_call(
+            'Upload failed (404): File not found',
+            log.ERROR)
+
+    def test_upload_file_os_error(self, patched_upload):
+        patched_upload.urlopen.side_effect = OSError("Invalid")
+
+        cmd = patched_upload.cmd
+        cmd.ensure_finalized()
+
+        with pytest.raises(OSError):
+            cmd.run()
+
+        cmd.announce.assert_any_call('Invalid', log.ERROR)
+
+    @mock.patch('setuptools.command.upload.spawn')
+    def test_upload_file_gpg(self, spawn, patched_upload):
+        cmd, urlopen = patched_upload
+
+        cmd.sign = True
+        cmd.identity = "Alice"
+        cmd.dry_run = True
+        content_fname = cmd.distribution.dist_files[0][2]
+        signed_file = content_fname + '.asc'
+
+        with open(signed_file, 'wb') as f:
+            f.write("signed-data".encode('utf-8'))
+
+        cmd.ensure_finalized()
+        cmd.run()
+
+        # Make sure that GPG was called
+        spawn.assert_called_once_with([
+            "gpg", "--detach-sign", "--local-user", "Alice", "-a",
+            content_fname
+        ], dry_run=True)
+
+        # Read the 'signed' data that was transmitted
+        entries = patched_upload.get_uploaded_metadata()
+        assert entries['gpg_signature'] == 'signed-data'
+
+    def test_show_response_no_error(self, patched_upload):
+        # This test is just that show_response doesn't throw an error
+        # It is not really important what the printed response looks like
+        # in a deprecated command, but we don't want to introduce new
+        # errors when importing this function from distutils
+
+        patched_upload.cmd.show_response = True
+        patched_upload.cmd.ensure_finalized()
+        patched_upload.cmd.run()
diff --git a/setuptools/tests/test_virtualenv.py b/setuptools/tests/test_virtualenv.py
index b66a311d..3d5c84b0 100644
--- a/setuptools/tests/test_virtualenv.py
+++ b/setuptools/tests/test_virtualenv.py
@@ -57,9 +57,6 @@ def test_pip_upgrade_from_source(virtualenv):
     Check pip can upgrade setuptools from source.
     """
     dist_dir = virtualenv.workspace
-    if sys.version_info < (2, 7):
-        # Python 2.6 support was dropped in wheel 0.30.0.
-        virtualenv.run('pip install -U "wheel<0.30.0"')
     # Generate source distribution / wheel.
     virtualenv.run(' && '.join((
         'cd {source}',
@@ -137,3 +134,14 @@ def test_test_command_install_requirements(bare_virtualenv, tmpdir):
         'python setup.py test -s test',
     )).format(tmpdir=tmpdir))
     assert tmpdir.join('success').check()
+
+
+def test_no_missing_dependencies(bare_virtualenv):
+    """
+    Quick and dirty test to ensure all external dependencies are vendored.
+    """
+    for command in ('upload',):  # sorted(distutils.command.__all__):
+        bare_virtualenv.run(' && '.join((
+            'cd {source}',
+            'python setup.py {command} -h',
+        )).format(command=command, source=SOURCE_DIR))
diff --git a/setuptools/tests/test_wheel.py b/setuptools/tests/test_wheel.py
index 6db5fa11..e85a4a7e 100644
--- a/setuptools/tests/test_wheel.py
+++ b/setuptools/tests/test_wheel.py
@@ -63,6 +63,7 @@ WHEEL_INFO_TESTS = (
     }),
 )
 
+
 @pytest.mark.parametrize(
     ('filename', 'info'), WHEEL_INFO_TESTS,
     ids=[t[0] for t in WHEEL_INFO_TESTS]
@@ -487,6 +488,7 @@ WHEEL_INSTALL_TESTS = (
 
 )
 
+
 @pytest.mark.parametrize(
     'params', WHEEL_INSTALL_TESTS,
     ids=list(params['id'] for params in WHEEL_INSTALL_TESTS),
diff --git a/setuptools/tests/test_windows_wrappers.py b/setuptools/tests/test_windows_wrappers.py
index d2871c0f..2553394a 100644
--- a/setuptools/tests/test_windows_wrappers.py
+++ b/setuptools/tests/test_windows_wrappers.py
@@ -97,7 +97,8 @@ class TestCLI(WrapperTester):
             'arg 4\\',
             'arg5 a\\\\b',
         ]
-        proc = subprocess.Popen(cmd, stdout=subprocess.PIPE, stdin=subprocess.PIPE)
+        proc = subprocess.Popen(
+            cmd, stdout=subprocess.PIPE, stdin=subprocess.PIPE)
         stdout, stderr = proc.communicate('hello\nworld\n'.encode('ascii'))
         actual = stdout.decode('ascii').replace('\r\n', '\n')
         expected = textwrap.dedent(r"""
@@ -134,7 +135,11 @@ class TestCLI(WrapperTester):
         with (tmpdir / 'foo-script.py').open('w') as f:
             f.write(self.prep_script(tmpl))
         cmd = [str(tmpdir / 'foo.exe')]
-        proc = subprocess.Popen(cmd, stdout=subprocess.PIPE, stdin=subprocess.PIPE, stderr=subprocess.STDOUT)
+        proc = subprocess.Popen(
+            cmd,
+            stdout=subprocess.PIPE,
+            stdin=subprocess.PIPE,
+            stderr=subprocess.STDOUT)
         stdout, stderr = proc.communicate()
         actual = stdout.decode('ascii').replace('\r\n', '\n')
         expected = textwrap.dedent(r"""
@@ -172,7 +177,9 @@ class TestGUI(WrapperTester):
             str(tmpdir / 'test_output.txt'),
             'Test Argument',
         ]
-        proc = subprocess.Popen(cmd, stdout=subprocess.PIPE, stdin=subprocess.PIPE, stderr=subprocess.STDOUT)
+        proc = subprocess.Popen(
+            cmd, stdout=subprocess.PIPE, stdin=subprocess.PIPE,
+            stderr=subprocess.STDOUT)
         stdout, stderr = proc.communicate()
         assert not stdout
         assert not stderr
diff --git a/setuptools/unicode_utils.py b/setuptools/unicode_utils.py
index 7c63efd2..3b8179a8 100644
--- a/setuptools/unicode_utils.py
+++ b/setuptools/unicode_utils.py
@@ -1,5 +1,6 @@
 import unicodedata
 import sys
+import re
 
 from setuptools.extern import six
 
@@ -42,3 +43,15 @@ def try_encode(string, enc):
         return string.encode(enc)
     except UnicodeEncodeError:
         return None
+
+
+CODING_RE = re.compile(br'^[ \t\f]*#.*?coding[:=][ \t]*([-\w.]+)')
+
+
+def detect_encoding(fp):
+    first_line = fp.readline()
+    fp.seek(0)
+    m = CODING_RE.match(first_line)
+    if m is None:
+        return None
+    return m.group(1).decode('ascii')
diff --git a/setuptools/wheel.py b/setuptools/wheel.py
index 95a794a8..e11f0a1d 100644
--- a/setuptools/wheel.py
+++ b/setuptools/wheel.py
@@ -8,10 +8,11 @@ import posixpath
 import re
 import zipfile
 
-from pkg_resources import Distribution, PathMetadata, parse_version
+import pkg_resources
+import setuptools
+from pkg_resources import parse_version
 from setuptools.extern.packaging.utils import canonicalize_name
 from setuptools.extern.six import PY3
-from setuptools import Distribution as SetuptoolsDistribution
 from setuptools import pep425tags
 from setuptools.command.egg_info import write_requirements
 
@@ -79,7 +80,7 @@ class Wheel:
         return next((True for t in self.tags() if t in supported_tags), False)
 
     def egg_name(self):
-        return Distribution(
+        return pkg_resources.Distribution(
             project_name=self.project_name, version=self.version,
             platform=(None if self.platform == 'any' else get_platform()),
         ).egg_name() + '.egg'
@@ -130,9 +131,9 @@ class Wheel:
         zf.extractall(destination_eggdir)
         # Convert metadata.
         dist_info = os.path.join(destination_eggdir, dist_info)
-        dist = Distribution.from_location(
+        dist = pkg_resources.Distribution.from_location(
             destination_eggdir, dist_info,
-            metadata=PathMetadata(destination_eggdir, dist_info),
+            metadata=pkg_resources.PathMetadata(destination_eggdir, dist_info),
         )
 
         # Note: Evaluate and strip markers now,
@@ -155,7 +156,7 @@ class Wheel:
             os.path.join(egg_info, 'METADATA'),
             os.path.join(egg_info, 'PKG-INFO'),
         )
-        setup_dist = SetuptoolsDistribution(
+        setup_dist = setuptools.Distribution(
             attrs=dict(
                 install_requires=install_requires,
                 extras_require=extras_require,
diff --git a/tests/manual_test.py b/tests/manual_test.py
index 52295f9a..99db4b01 100644
--- a/tests/manual_test.py
+++ b/tests/manual_test.py
@@ -8,7 +8,7 @@ import subprocess
 from distutils.command.install import INSTALL_SCHEMES
 from string import Template
 
-from six.moves import urllib
+from setuptools.extern.six.moves import urllib
 
 
 def _system_call(*args):
diff --git a/tests/requirements.txt b/tests/requirements.txt
index b38fcbf0..f944df27 100644
--- a/tests/requirements.txt
+++ b/tests/requirements.txt
@@ -3,8 +3,11 @@ pytest-flake8; python_version!="3.4"
 pytest-flake8<=1.0.0; python_version=="3.4"
 virtualenv>=13.0.0
 pytest-virtualenv>=1.2.7
-pytest>=3.0.2
+# pytest pinned to <4 due to #1638
+pytest>=3.7,<4
 wheel
 coverage>=4.5.1
 pytest-cov>=2.5.1
 paver; python_version>="3.6"
+futures; python_version=="2.7"
+pip==18.1  # Temporary workaround for #1644.
diff --git a/tox.ini b/tox.ini
index a2f850df..a31cb1c5 100644
--- a/tox.ini
+++ b/tox.ini
@@ -12,7 +12,7 @@ deps=-rtests/requirements.txt
 # Changed from default (`python -m pip ...`)
 # to prevent the current working directory
 # from being added to `sys.path`.
-install_command={envbindir}/pip install {opts} {packages}
+install_command=python -c 'import sys; sys.path.remove(""); from pkg_resources import load_entry_point; load_entry_point("pip", "console_scripts", "pip")()' install {opts} {packages}
 # Same as above.
 list_dependencies_command={envbindir}/pip freeze
 setenv=COVERAGE_FILE={toxworkdir}/.coverage.{envname}