Add mock, pytest, tox, virtualenv optional packages

[jdemeyer]

These are all packages which are used for testing Python packages.

Upstream tarballs:

• https://pypi.python.org/packages/source/m/mock/mock-1.3.0.tar.gz
• https://pypi.python.org/packages/source/n/nose/nose-1.3.7.tar.gz (existing package, just an update)
• https://pypi.python.org/packages/source/p/pbr/pbr-1.8.1.tar.gz
• https://pypi.python.org/packages/source/p/pluggy/pluggy-0.3.1.tar.gz
• https://pypi.python.org/packages/source/p/py/py-1.4.31.tar.gz
• https://pypi.python.org/packages/source/p/pytest/pytest-2.8.4.tar.gz
• https://pypi.python.org/packages/source/t/tox/tox-2.2.1.tar.gz
• https://pypi.python.org/packages/source/v/virtualenv/virtualenv-13.1.2.tar.gz

Component: packages: optional

Work Issues: Dependencies

Author: Jeroen Demeyer

Branch/Commit: u/jdemeyer/add_mock__pytest__tox_optional_packages @ 353210b

Reviewer: Michael Orlitzky

Issue created by migration from https://trac.sagemath.org/ticket/19680

[jdemeyer]

Branch: u/jdemeyer/add_mock__pytest__tox_optional_packages

[jdemeyer]

Commit: 353210b

[jdemeyer]

New commits:

353210b

Add mock, pytest, tox, virtualenv optional packages

[vbraun]

comment:11

Can't these all be installed via pip? Why not make them pip-type packages?

[jdemeyer]

comment:12

Replying to @vbraun:

Can't these all be installed via pip? Why not make them pip-type packages?

Well, I would like to eventually change the build system to make such packages automatic dependencies if SAGE_CHECK=yes. Many Python packages have a test suite, but we don't run them because they require these extra packages.

Since pip packages bypass the usual local/var/lib/sage/installed system, they should not be used as dependencies of other packages.

[vbraun]

comment:13

A pip-type package could just update local/var/lib/sage/installed with the output of pip list

IMHO we are going to fight an uphill battle if we keep repackaging more and more of pypi for stuff that has no direct mathematical use. It just wastes our own resources that could be spent elsewhere. We should be relying more on pip, not less.

[jdemeyer]

comment:14

needs_work because of the old-style dependency lists. Let me know if anybody wants to review this, then I'll make the required changes.

[jdemeyer]

Work Issues: Dependencies

[kiwifb]

comment:15

I'll look, we need those for testing.

[vbraun]

comment:16

I think its a bit too much to make all testsuite dependencies de facto standard packages because they are dependencies of standard packages.

How about requiring internet access for building with SAGE_CHECK=yes? Then all those pip packages could just be installed by a script-type check_dependencies package that just contains

if SAGE_CHECK
    pip install -r check-requirements.txt

[mkoeppe]

comment:17

Replying to @vbraun:

How about requiring internet access for building with SAGE_CHECK=yes? Then all those pip packages could just be installed by a script-type check_dependencies package that just contains

if SAGE_CHECK
    pip install -r check-requirements.txt

I have a version of this in #28998.

[orlitzky]

comment:19

Our python situation is unrecognizable from five years ago; this will need to be started from scratch if there's anything to be salvaged.

[orlitzky]

Reviewer: Michael Orlitzky