Platform specific settings in tox

Question

I would like to specify a few additional settings in my tox configuration, but only when I'm running on a certain platform.

For example, when running on windows I want an extra environment variable to be defined. I would like to do something like this

[tox]
envlist = env1, env2, env_win32, env_arch

[testenv]
commands= 
    do stuff...

[testenv]
platform = arch
setenv = 
    NAME = VALUE

[testenv:env_win32]
plaform = win32
more = stuff

[testenv:env_arch]
platform = arch
more = different_stuff

but this doesn't work because of the duplicate testenv section. I want the specified environment variable to apply to all environments (e.g. env1, env2, env_arch) but not on env_win32.

Note: The specific case that I'm dealing with is that on *nix platforms we need to specify an extra environment variable for install_command only, so the command includes /usr/bin/env NAME=VALUE at the beginning. Unfortunately, this doesn't exist on windows which causes it to fail. I want to conditionally define the install_command differently depending on the platform to get around this.

Answer 1

[tox]
envlist = env1, env2, env_win32, env_linux

[testenv]
install_command = pip install {opts} {packages}

[testenv-linux]
platform = linux
install_command = /usr/bin/env NAME=VALUE pip install {opts} {packages}

[testenv:env_win32]
plaform = win32
install_command = {[testenv]install_command}

[testenv:env_linux]
platform = linux
install_command = {[testenv-linux]install_command}