Heroku and CFFI 2014-07-22

UPDATE: This is no longer needed, the Python buildpack will install libffi for you if cffi or cryptography is present in your requirements.txt.

CFFI is a popular Python library to call C code from Python. Some major libraries that depend on it include:

buildpack-cffi allows any of these libraries to be installed and used in Heroku applications.

Usage

First set your BUILDPACK_URL to https://github.com/ddollar/heroku-buildpack-multi.git:

$ heroku config:set BUILDPACK_URL=https://github.com/ddollar/heroku-buildpack-multi.git

Create the .buildpacks config for buildpack-multi:

$ cat .buildpacks
https://github.com/ddollar/heroku-buildpack-apt
https://github.com/coderanger/heroku-buildpack-cffi
https://github.com/heroku/heroku-buildpack-python

And then create the Aptfile config for buildpack-apt:

$ cat Aptfile
libffi-dev

Then just put the Python libraries you need in the normal requirements.txt.

If you are installing Cryptography, no additional configuration should be required.

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