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.. _platform-specification:
Platform specification
============================
Basic multi-platform example
----------------------------
Assuming the following layout:
.. code-block:: shell
tox.ini # see below for content
setup.py # a classic distutils/setuptools setup.py file
and the following ``tox.ini`` content:
.. code-block:: ini
[tox]
# platform specification support is available since version 2.0
minversion = 2.0
envlist = py{27,36}-{mylinux,mymacos,mywindows}
[testenv]
# environment will be skipped if regular expression does not match against the sys.platform string
platform = mylinux: linux
mymacos: darwin
mywindows: win32
# you can specify dependencies and their versions based on platform filtered environments
deps = mylinux,mymacos: py==1.4.32
mywindows: py==1.4.30
# upon tox invocation you will be greeted according to your platform
commands=
mylinux: python -c 'print("Hello, Linus!")'
mymacos: python -c 'print("Hello, Steve!")'
mywindows: python -c 'print("Hello, Bill!")'
you can invoke ``tox`` in the directory where your ``tox.ini`` resides.
``tox`` creates two virtualenv environments with the ``python2.7`` and
``python3.6`` interpreters, respectively, and will then run the specified
command according to platform you invoke ``tox`` at.
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