Re: disable building wheel for a package

A corner case is where the package is importable because it is on
$PYTHONPATH and so the $virtual_env at runtime is different than the one at
install time. That is why it might be useful to store the data directory
per-package.
wheel.install.get_install_paths(package_name) shows where things would be
installed according to wheel. It comes from a call to distutils. pip has
its own implementation. On my machine data goes into $virtualenv in a
virtualenv and into /usr on system python.

On Fri, Sep 14, 2018 at 11:26 AM Paul Moore <[email protected]> wrote:

> On Fri, 14 Sep 2018 at 16:03, Daniel Holth <[email protected]> wrote:
> >
> > It can be hard to predict where data went at runtime.
>
> I don't think it's "hard to predict". I *do* think it's badly
> documented/not standardised. See my previous note - pip installs into
> the install_data location that setuptools/distutils chooses. Ideally:
>
> a) Setuptools and/or distutils would document where that is clearly
> and in an easy to find location.
> b) There should be a standard defining "schemes" like this so that the
> choices aren't implementation-defined (by pip, setuptools and
> distutils in some weird combination).
>
> Of course "there should be..." means "someone who cares enough needs
> to invest time in..." :-(
>
> >  Maybe we could record its path in .dist-info during the install. I
> think it may also not be clear how to put files into wheel's data directory
> from setup.py.
>
> Better would be to have a supported library that exposes the logic pip
> uses (or as I said above, the standard-defined logic) to determine
> such paths. See https://github.com/pypa/pip/issues/5191
>
> > If we added more categories it would allow the installer to override
> e.g. just the config directory rather than copying a Unix-like tree under
> data/ onto the install path.
>
> That's a reasonable but somewhat unrelated suggestion. I don't think
> it's needed for the OP's use case, but it may well be helpful for
> others.
>
> Paul
>

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