Merge branch 'meta/tox' into 'master'

Basic python3 testing packages

```
Includes:
* user/py3-tox
  * user/py3-setuptools
  * user/py3-pluggy
  * user/py3-virtualenv
  * user/py3-pytest
    ** user/py3-py

Most of these packages use tox itself for tests, so !check until we have
a copy of tox on the mirrors with which to bootstrap.
```

See merge request !16

1 files changed, 74 insertions, 0 deletions

diff --git a/user/py3-virtualenv/test-python3.patch b/user/py3-virtualenv/test-python3.patch
new file mode 100644
index 000000000..8b4a99b51
--- /dev/null
+++ b/user/py3-virtualenv/test-python3.patch
@@ -0,0 +1,74 @@
+--- virtualenv-15.1.0/tests/test_activate_output.expected	2016-11-16 02:39:30.000000000 +0000
++++ virtualenv-15.1.0/tests/test_activate_output.expected	2018-01-10 23:31:17.840000000 +0000
+@@ -1,2 +1,4 @@
+-New python executable in /tmp/test_virtualenv_activate.venv/bin/python
++Using base prefix '/usr'
++New python executable in /tmp/test_virtualenv_activate.venv/bin/python3
++Also creating executable in /tmp/test_virtualenv_activate.venv/bin/python
+ Installing setuptools, pip, wheel...done.
+--- virtualenv-15.1.0/tests/test_virtualenv.py	2016-11-16 02:39:30.000000000 +0000
++++ virtualenv-15.1.0/tests/test_virtualenv.py	2018-01-11 03:40:22.270000000 +0000
+@@ -58,13 +58,13 @@
+ def test_activate_after_future_statements():
+     """Should insert activation line after last future statement"""
+     script = [
+-        '#!/usr/bin/env python',
++        '#!/usr/bin/env python3',
+         'from __future__ import with_statement',
+         'from __future__ import print_function',
+         'print("Hello, world!")'
+     ]
+     assert virtualenv.relative_script(script) == [
+-        '#!/usr/bin/env python',
++        '#!/usr/bin/env python3',
+         'from __future__ import with_statement',
+         'from __future__ import print_function',
+         '',
+@@ -110,7 +110,7 @@
+         if virtualenv.is_win:
+             required_executables = ['python.exe', 'pythonw.exe']
+         else:
+-            py_exe_no_version = 'python'
++            py_exe_no_version = 'python3'
+             py_exe_version_major = 'python%s' % sys.version_info[0]
+             py_exe_version_major_minor = 'python%s.%s' % (
+                 sys.version_info[0], sys.version_info[1])
+--- virtualenv-15.1.0/tests/test_activate.sh	2016-11-16 02:39:30.000000000 +0000
++++ virtualenv-15.1.0/tests/test_activate.sh	2018-01-11 03:49:05.070000000 +0000
+@@ -19,7 +19,7 @@
+ echo "$0: Created virtualenv ${TESTENV}." 1>&2
+ 
+ echo "$0: Activating ${TESTENV}..." 1>&2
+-. ${TESTENV}/bin/activate
++PS1="${PS1:-}" . ${TESTENV}/bin/activate
+ echo "$0: Activated ${TESTENV}." 1>&2
+ 
+ echo "$0: Checking value of \$VIRTUAL_ENV..." 1>&2
+@@ -31,14 +31,14 @@
+ 
+ echo "$0: \$VIRTUAL_ENV = \"${VIRTUAL_ENV}\" -- OK." 1>&2
+ 
+-echo "$0: Checking output of \$(which python)..." 1>&2
++echo "$0: Checking output of \$(which python3)..." 1>&2
+ 
+-if [ "$(which python)" != "${TESTENV}/bin/python" ]; then
+-    echo "$0: Expected \$(which python) to return \"${TESTENV}/bin/python\"; actual value: \"$(which python)\"!" 1>&2
++if [ "$(which python3)" != "${TESTENV}/bin/python3" ]; then
++    echo "$0: Expected \$(which python3) to return \"${TESTENV}/bin/python3\"; actual value: \"$(which python3)\"!" 1>&2
+     exit 3
+ fi
+ 
+-echo "$0: Output of \$(which python) is OK." 1>&2
++echo "$0: Output of \$(which python3) is OK." 1>&2
+ 
+ echo "$0: Checking output of \$(which pip)..." 1>&2
+ 
+@@ -60,7 +60,7 @@
+ 
+ echo "$0: Executing a simple Python program..." 1>&2
+ 
+-TESTENV=${TESTENV} python <<__END__
++TESTENV=${TESTENV} python3 <<__END__
+ import os, sys
+ 
+ expected_site_packages = os.path.join(os.environ['TESTENV'], 'lib','python%s' % sys.version[:3], 'site-packages')