CircleCI hack for saving keeping databases in build cache

circle.yml

# Notes:
#  - Replace <DB_NAME> with your database
#  - Replace <SOME_PROJECT_WITH_A_TEST> with an appname that has an integration test, this will run your migrations

 database:
    override:
        # Preserve Postgres in cache
        - sudo service postgresql stop || exit 0
        - "if [ -d ~/postgres/ ]; then sudo cp -r ~/postgres/* /var/lib/postgresql/9.4; sudo chown -R postgres:postgres /var/lib/postgresql/9.4/*; fi"
        - sudo service postgresql start || exit 0
        - if [ `psql -t -c "SELECT 1 FROM pg_database WHERE datname = '<DB_NAME>'"` -eq 1 ] ; then echo "Database already exists"; else psql -c 'create database <DB_NAME>;'; fi 
        - python manage.py migrate --noinput --verbosity 2
        # Create test DBs
        - python manage.py test <SOME_PROJECT_WITH_A_TEST> --keepdb --noinput
        # Preserve Postgres in cache
        - "[ -d ~/postgres ] || mkdir ~/postgres"
        - sudo service postgresql stop || exit 0
        - "sudo cp -r /var/lib/postgresql/9.4/* ~/postgres/"
        - sudo service postgresql start || exit 0