build and publish 3.6 + 3.7 wheels for OSX and Linux?

[kwlzn]

currently, on pypi here: https://pypi.org/project/cryptography/#files

the latest version of cryptography publishes a platform comprehensive set of wheels for python 2.7:

cryptography-2.3-cp27-cp27m-macosx_10_6_intel.whl (1.5 MB)
cryptography-2.3-cp27-cp27m-manylinux1_i686.whl (1.9 MB)
cryptography-2.3-cp27-cp27m-manylinux1_x86_64.whl (2.1 MB)
cryptography-2.3-cp27-cp27mu-manylinux1_i686.whl (1.9 MB)
cryptography-2.3-cp27-cp27mu-manylinux1_x86_64.whl (2.1 MB)
cryptography-2.3-cp27-cp27m-win32.whl (1.1 MB)
cryptography-2.3-cp27-cp27m-win_amd64.whl (1.3 MB)

for 3.6/3.7, only win32 wheels are provided:

cryptography-2.3-cp36-cp36m-win32.whl (1.1 MB)
cryptography-2.3-cp36-cp36m-win_amd64.whl (1.3 MB)
cryptography-2.3-cp37-cp37m-win32.whl (1.1 MB)
cryptography-2.3-cp37-cp37m-win_amd64.whl (1.3 MB)

this makes it very easy to consume cryptography as third party dep directly from pypi when using 2.7 - but less so when using modern 3.x - as a compilation step is needed (and thus requires ffi/openssl/etc devel packages).

would there be some way to begin building and publishing a more platform-comprehensive set of wheels for both 3.6 and 3.7?

we could happily provide a PR for this if that sounds reasonable (and assuming there's some reasonable way to test a contrib PR - the build seems to rely on an internal Jenkins instance, fwict?).

[reaperhulk]

On macOS and linux we publish limited API wheels (tagged abi3) that work with 3.4+. We can't publish those on Windows for a variety of unfortunate reasons that will hopefully be gone in the next year or two, which is why you see cp37 specific wheels there.

If your pip isn't finding the abi3 wheels you'll need to upgrade it.

[kwlzn]

ah, thanks.

[zooba]

@reaperhulk Sorry to resurrect the thread, but even the latest version of pip won't resolve the abi3 wheels as a dependency when doing pip download for an alternate platform because of pip's restrictions here.

There is more detailed analysis at Azure/azure-functions-core-tools#1150 and a workaround by downloading cryptography separately and renaming the wheel so that it can be resolved.

There's also a pip bug at pypa/pip#6070 though as usual when one particular wheel is causing problems it may be easier (and certainly faster) to fix it here first until the tools can fully support your intended workload.