Install openstack keystone on OSX

install-macos-keystone.sh

# This simple setup fixes the following error on MacOS.
#
#      scrypt-1.2.1/libcperciva/crypto/crypto_aes.c:6:10: fatal error: 'openssl/aes.h' file not found
#      #include <openssl/aes.h>
#               ^~~~~~~~~~~~~~~
#      1 error generated.
#      error: command '/usr/bin/clang' failed with exit code 1
#      [end of output]
#
#  note: This error originates from a subprocess, and is likely not a problem with pip.
#  ERROR: Failed building wheel for scrypt


export CFLAGS="-I$(brew --prefix openssl)/include"
export LDFLAGS="-L$(brew --prefix openssl)/lib"
pip install cryptography --force-reinstall
pip install git+https://github.com/openstack/keystone