Issue 4014 - Publish python-abp on PyPI

tox.ini

Index: tox.ini
===================================================================
--- a/tox.ini
+++ b/tox.ini
@@ -1,25 +1,19 @@
 [tox]
-envlist = py27,py35,py36,pypy,coverage,flake8
+envlist = py27,py35,py36,pypy,flake8
 
 [flake8]
 ignore = D107, N801, W503
 
 [testenv]
 deps =
-    pytest
-    mock
-commands =
-    py.test tests
-
-[testenv:coverage]
-deps =
     pytest-cov
     mock
 commands =
-    py.test --cov=abp --cov-report=term-missing tests
+    python -c 'import sys; open(".coveragerc", "w").write("[report]\nexclude_lines = pragma: no py\{\} cover".format(sys.version_info[0]))'

[Vasily Kuznetsov, 2019/01/02 18:32:28]

This is clever but I wonder if it would look less cryptic if we used `echo -e`
or `printf` and environment variables instead (see
https://tox.readthedocs.io/en/latest/config.html#injected-environment-variables).
Something like:

    echo -e "[report]\nexclude_lines = pragma: no $TOX_ENV_NAME cover"
>.coveragerc

What do y'all think?

[Sebastian Noack, 2019/01/02 20:42:31]

There are following problems with this approach:

1. TOX_ENV_NAME is fairly new, it was introduced with tox 3.4. For reference,
Debian Buster (currently testing / next stable) as well as Ubuntu 18.10 still
come with tox 2.5. So we would have to instruct Linux users to install the
latest tox version from PyPI system-wide (something I genrally don't do), or to
set up a virtualenv to run tox from. IMO, this isn't worth it if it's just for
this feature.
2. We don't want to mark lines to be excluded on a specific interpreter but on
either Python 2 or 3.
3. We want to avoid using UNIX commands for compatibility with Windows.

[rhowell, 2019/01/03 04:42:28]

I briefly tried using tox environment variables, but ran into the issue that
they're new with tox 3.4. Also, since we added 'Operating System :: OS
Independent' to setup.py, we should try to keep it as generic as possible. But,
I can add a comment so it's a bit less cryptic.

+    py.test --cov=abp --cov-report=term-missing --cov-fail-under=100 tests
 
-# We have to install our package in development mode
-# so that pytest-cov can find the .coverage file.
+# We have to install our package in development mode so that pytest-cov can
+# find the .coverage and .coveragerc files.
 usedevelop = true
 
 [testenv:flake8]