heroku-buildpack-python/bin/steps/django

#!/usr/bin/env bash

# This script serves as the Django build step of the
# [**Python Buildpack**](https://github.com/heroku/heroku-buildpack-python)
# compiler.
#
# A [buildpack](http://devcenter.heroku.com/articles/buildpacks) is an
# adapter between a Python application and Heroku's runtime.
#
# This script is invoked by [`bin/compile`](/).

# ## Sanity Checks
#

# Reject a Django app that appears to be packaged incorrectly.
if [ -f settings.py ]; then
  echo " !     Django app must be in a package subdirectory"
  exit 1
fi

echo "-----> Installing dj-database-url..."
pip install --use-mirrors dj-database-url==0.1.1 | indent

echo "-----> Injecting Django settings..."

SETTINGS_FILE=$(find . -maxdepth 2 -type f -name 'settings.py' | head -1)
PROJECT=$(dirname $SETTINGS_FILE)

echo "Injecting code into $SETTINGS_FILE to read from DATABASE_URL" | indent

cat >>$SETTINGS_FILE <<EOF

import dj_database_url

DATABASES['default'] = dj_database_url.config()
EOF