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_NAME
#  - STAGING_APP_URL

set -e

export HEROKU_API_KEY="${API_KEY}"

# Turn on Heroku maintenance mode
heroku maintenance:on --app ${STAGING_APP_NAME}

# Push
git remote add heroku "git@heroku.com:${STAGING_APP_NAME}.git"
git push heroku -f "${COMMIT_ID}:refs/heads/master"

# if migrations are enabled
heroku_run rake db:migrate "${STAGING_APP_NAME}"

# heroku_run restart "${STAGING_APP_NAME}"
# Turn off Heroku maintenance mode
heroku maintenance:off --app ${STAGING_APP_NAME}

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

Based on https://gist.github.com/mlocher/3e831316f022f21a1b27