[vtkusers] Help building Python wheels for VTK

[David E DeMarle]

Thanks Dave for laying it out.

I'll try and steal some of my cycles too, but they likely won't come until
the runup to the next release (a month or more from now).

We do 1c for paraview and vtkpython binaries. The exact incantations vary
per OS. Search for fixup bundle for reference material.




David E DeMarle
Kitware, Inc.
R&D Engineer
21 Corporate Drive
Clifton Park, NY 12065-8662
Phone: 518-881-4909


On Fri, Aug 8, 2014 at 12:07 PM, David Gobbi <david.gobbi at gmail.com> wrote:

> Okay, I've taken a long look at PEP 427 and I have an inkling of how a
> python VTK wheel can be built.
>
> First, a new CMake variable "VTK_BUILD_PYTHON_WHEEL" should be
> added, to turn on the wheel-building machinery.  When this variable is set,
> the following should happen:
>
>
> 1) CMake should build a wheel-compatible vtk module directory,
> which will differ from the current vtk python module directory in the
> following ways:
>
> 1a) The .py files will not be compiled (no .pyc files)
>
> 1b) The directory will contain not only the extension modules (i.e.
> the .so/.pyd files), but it will also contain all of the VTK runtime
> libraries that the extension modules depend on.
>
> 1c) CMake will have to set the loader paths in all the shared objects
> so that they can find each other.
>
>
> 2) After CMake has built the module, the python wheel-building tools
> can hopefully do the rest:
>
> 2a) CMake will check that python has the "wheel" installed
>
> 2b) the python module directory that CMake built above becomes the
> wheel platlib subdir.
>
> 2c) "wheel" will create all the other necessary files and create the .whl
>
>
> I know how to do 1a and 1b, and can look into 1c (CMake should easily
> be able to do it for all platforms).  I probably won't be able to do
> any work on this in the immediate future, though.
>
>  - David
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