pyximport and dependencies tracking

[dvd]

Hi all,

we started using heavily cython relying on the pyximport facility.
Unfortunately the lack of dependencies tracking makes the daily work a
bit
annoying (change a pxd file -> run -> segfault -> rebuild -> enjoy).

We think that a possible solution could be:

* every time a pxd file is modified pyximport writes in a private
file
(under ~/.pyxbld) a list of dependencies
* a subsequent invocation of pyximport passes the list of
dependencies to the
distutils.extension.Extension constructor

Maybe Cython.Build.Dependencies.parse_dependencies could be used to
extract the
dependencies list.

If you think that it can work I can write a patch.

david

[Robert Bradshaw]

Yes, I think that would be great. The functionalities of pyximport and
Cython.Build probably overlap more than that (e.g. .pyx file ->
Extension object, and this could handles other distutils options as
well.)

- Robert