Codeship custom script for Heroku deploying with maintenance mode

codeship_heroku_with_maintenance_mode.sh

#!/bin/sh

# This codeship custom script depends on:
#  - API_KEY env var from Heroku
#  - STAGING_APP_URL

set -e

export HEROKU_API_KEY="${API_KEY}"

# Add Heroku remote
git remote add heroku "git@heroku.com:${STAGING_APP_NAME}.git"

# Push build folder to heroku
git push heroku $(git subtree split --prefix build build):master --force

# check if the app is up and running
check_url "${STAGING_APP_URL}"