[Matplotlib-devel] tests+baseline images no longer installed by default

[Thomas Caswell]

Folks (particularly down-stream packagers),

As of https://github.com/matplotlib/matplotlib/pull/7757 (which is
currently on master and I am in the process of backporting for 2.0) the
test images are not installed by default.  We already are stripping the
test images from the official wheels and conda-forge packages.  This change
greatly reduces the resultant file size :


23:41 $ python setup.py sdist bdist_wheel
23:41 $ du -hs dist/*
11M     dist/matplotlib-2.0.0rc2+60.ge83e108ef-cp36-cp36m-linux_x86_64.whl
51M     dist/matplotlib-2.0.0rc2+60.ge83e108ef.tar.gz


To restore installing the tests and images have a `setup.cfg` with

[packages]
tests = True
toolkit_tests = True

in the source directory at build / install time.

A consequence of this change is that by default `pip install ./` or
`setup.py install` will not install the tests (and hence `python
run_tests.py` will not work).  We suggest using `pip install -v -e ./` or
using a `setup.cfg` file.

Tom
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