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heroku-buildpack-python/bin/steps/cryptography
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2017-03-14 11:59:39 -04:00

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#!/usr/bin/env bash
# This script serves as the Cryptography build step of the
# [**Python Buildpack**](https://github.com/heroku/heroku-buildpack-python)
# compiler.
#
# A [buildpack](https://devcenter.heroku.com/articles/buildpacks) is an
# adapter between a Python application and Heroku's runtime.
#
# This script is invoked by [`bin/compile`](/).
# The location of the pre-compiled libffi binary.
VENDORED_LIBFFI="https://lang-python.s3.amazonaws.com/$STACK/libraries/vendor/libffi.tar.gz"
PKG_CONFIG_PATH="/app/.heroku/vendor/lib/pkgconfig:$PKG_CONFIG_PATH"
# Syntax sugar.
source $BIN_DIR/utils
bpwatch start libffi_install
# If a package using cffi exists within requirements, use vendored libffi.
if (pip-grep -s requirements.txt argon2-cffi bcrypt cffi cryptography django[argon2] Django[argon2] django[bcrypt] Django[bcrypt] PyNaCl pyOpenSSL PyOpenSSL requests[security] misaka &> /dev/null) then
if [ ! -d ".heroku/vendor/lib/libffi-3.1" ]; then
echo "-----> Noticed cffi. Bootstrapping libffi."
mkdir -p .heroku/vendor
# Download and extract libffi into target vendor directory.
curl $VENDORED_LIBFFI -s | tar zxv -C .heroku/vendor &> /dev/null
fi
export LIBFFI=$(pwd)/vendor
fi
bpwatch stop libffi_install