[py-dev] Upgrading from pytest 1.3.2 to 2.0 - computed conftest options

[holger krekel]

Hi Andy,

On Mon, Dec 06, 2010 at 16:20 -0500, Andy Fundinger wrote:
> I'm trying to upgrade from py.test 1.3.2 to 2.0 but I'm running into 
> issues with my use of the old style conftest.py feature to specify 
> options.  I specify options like:
> 
> 
> option_cov_branch = True 
> 
> option_cov_data_file = os.path.join(os.environ["PROJECT_ROOT"],"testCovFile%d.log"%random.randint(0,100000))
> 
> option_tx = ["popen//python=python",]*multiprocessing.cpu_count()
> 
> 
> the computed ones are a problem as the new .ini files can't take them 
> and the conftest.py file specification seems to be ignored.  Is there a 
> particular hook that I can grab and add/change config values early 
> enough to affect all plugins?

Indeed a feature regression.  I just added a new pytest_cmdline_processargs
hook to accomodate the situation.  The basic idea is to add command line 
arguments before option parsing takes place.  It is only called on the 
master.  The slaves do not call this hook.  

It's not released yet but you can see an example in the upcoming docs here:

    http://pytest.org/2.0.1dev/example/simple.html#dynamically-adding-command-line-options

and install the the development version with::

    pip install -i http://pypi.testrun.org -U pytest

Let me know of any issues.  A note already though: i think the pytest-cov plugin 
does not provide the options you use above.  Instead it uses/allows to point
to a .coveragerc file.  I believe it also cares for coverage data filenames
itself.

cheers,
holger
 
> 
> 
> 
> Regards,
> 
> Andy Fundinger
> 
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