Problems with custom LIBFFI Heroku buildpack

Question

I\'m trying to deploy my app to Heroku. It is using pyOpenSSL, which requires cryptography, which requires libffi. I found a custom buildp

Answer 1

It appears github user kennethjiang had the same problem and forked the custom libffi buildpack with a fix just four days ago.

Here are the relevant changes:

https://github.com/kennethjiang/heroku-buildpack-python-libffi/compare/3bb5fab8213f41411f515f21a6c83ff36c8aa1f2...8ef02

$ heroku config:add BUILDPACK_URL=git://github.com/kennethjiang/heroku-buildpack-python-libffi.git
$ git push heroku master
Initializing repository, done.
Counting objects: 3, done.
Writing objects: 100% (3/3), 260 bytes, done.
Total 3 (delta 0), reused 0 (delta 0)

-----> Fetching custom git buildpack... done
-----> Python app detected
-----> No runtime.txt provided; assuming python-2.7.4.
-----> Preparing Python runtime (python-2.7.4)
-----> Installing Distribute (0.6.36)
-----> Installing Pip (1.3.1)
-----> Noticed cffi. Bootstrapping libffi.
PKG_CONFIG_PATH=:/app/vendor/libffi-3.0/lib/pkgconfig/
libffi.pc is in-place at /app/vendor/libffi-3.0/vendor/lib/pkgconfig/libffi.pc, libffi-based builds should work!
-----> Installing dependencies using Pip (1.3.1)
       Downloading/unpacking pyOpenSSL==0.14 (from -r requirements.txt (line 1))
         Running setup.py egg_info for package pyOpenSSL

           no previously-included directories found matching 'doc/_build'
       Downloading/unpacking cryptography==0.2.2 (from -r requirements.txt (line 2))
         Running setup.py egg_info for package cryptography
           no previously-included directories found matching 'documentation/_build'
           zip_safe flag not set; analyzing archive contents...
           six: module references __file__
           six: module references __path__

           Installed /tmp/pip-build-u24412/cryptography/six-1.6.1-py2.7.egg
           Searching for cffi>=0.8
           Reading http://pypi.python.org/simple/cffi/
           Best match: cffi 0.8.2
           Downloading https://pypi.python.org/packages/source/c/cffi/cffi-0.8.2.tar.gz#md5=37fc88c62f40d04e8a18192433f951ec
           Processing cffi-0.8.2.tar.gz
           Writing /tmp/easy_install-vYzEMy/cffi-0.8.2/setup.cfg
           Running cffi-0.8.2/setup.py -q bdist_egg --dist-dir /tmp/easy_install-vYzEMy/cffi-0.8.2/egg-dist-tmp-KU0RrQ
           cc -c c/check__thread.c -o c/check__thread.o

           Installed /tmp/pip-build-u24412/cryptography/cffi-0.8.2-py2.7-linux-x86_64.egg
...

       Successfully installed pyOpenSSL cryptography six cffi pycparser
       Cleaning up...

-----> Discovering process types
       Procfile declares types -> (none)

-----> Compressing... done, 27.9MB
-----> Launching... done, v5
       http://quiet-atoll-6802.herokuapp.com/ deployed to Heroku

To git@heroku.com:quiet-atoll-6802.git
 * [new branch]      master -> master