Negated factor conditions.

[pytoxbot]

• Bitbucket: https://bitbucket.org/hpk42/tox/issue/292
• Originally reported by: mrmachine
• Originally created at: 2015-12-04T14:45:54.405

I'd like to do something like:

[testenv]
commands =
    cov: coverage run ... runtests.py
    cov: coveralls
    !cov: python runtests.py

Currently I have to declare factor conditions for cov and nocov instead, which means users must always specific either cov or nocov with tox -e. If they forget, tox just reports success without running any command:

[testenv]
commands =
    cov: coverage run ... runtests.py
    cov: coveralls
    nocov: python runtests.py

[pytoxbot]

Original comment by @hynek

For the record, since Twisted dropped Python 2.6, I was sorely missing a way to say !py26: twisted too. :|

[pytoxbot]

Original comment by @schinckel

FWIW, the syntax @pjdelport describes is documented at http://tox.readthedocs.io/en/latest/config-v2.html#transforming-the-examples-django-rest : I actually assumed it was possible to use this already.

[pytoxbot]

Original comment by @pjdelport

An implementation of issue #189 might provide another solution to this, by allowing the above to be expressed as a factor-based testenv override:

[testenv:cov]
commands =
    coverage run ... runtests.py
    coveralls

[pytoxbot]

Original comment by @pjdelport

This would be very handy: I just came here to report exactly the same issue, for the same use case.

Would a PR implementing the !factor: syntax be acceptable?

[jurko-gospodnetic]

Added pull request jurko-gospodnetic#1 for discussion. Not added to this repo as it's based on still unmerged test cleanup pull request #687, but I'll recreate it here as soon as that one is merged.

For now you can test it on that repo and leave the comments there.

[jurko-gospodnetic]

Pull request #694 on this repo now up for discussion and the original one closed.