Issues

Issue #126 resolved

Tox fails with no such option: --pre

Charles Cloud
created an issue

Comments (5)

  1. jenisys

    I also stumbled over this problem several times.

    It is related with virtualenv and its virtualenv_support package that stores copies of pip, setuptools (and distribute) installation packages. Therefore, it can happen that pip-1.3.1 is the installed pip version after you create a new virtual-environment (with tox). The current virtualenv-0.10.1 version normally installs pip-1.4.1 from its "virtualenv_support" directory (but note that virtualenv>=0.10 dropped support for python2.5).

    In addition, there seem to be multiple copies of "virtualenv_support" sometimes. This seems to occur when you install/upgrade virtualenv once with pip and once with easy_install (setuptools). Therefore, a feasible workaround can be to remove "virtualenv" and all its "virtualenv_support" directories from the "site-packages" directory and reinstall "virtualenv" again.

    Maybe the best way is that the configuration option "install_command" is not only a function of the python version but also of the pip version (that gets installed per default).

    WORK-AROUNDS:

    • Define "install_command = pip install {opts} {packages}" in "tox.ini"
    • Ensure a clean virtualenv with pip-1.4.1 in its "virtualenv_support" directory (for Python>=2.6)
  2. holger krekel repo owner

    fix issue126: depend on virtualenv>=1.10.1 so that we can rely (hopefully) on a pip version which supports --pre. (tox by default uses to --pre). Note that tox also vendors an older virtualenv for supporting python2.5 -- although the latter will be dropped at some point.

    → <<cset 7a16cd37007c>>

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