deploy.rb

HEROKU_APP = ARGV[0]
raise 'Heroku application name argument is missing. (e.g. \'ruby lib/tasks/teamcity/heroku/deploy.rb elcurator-staging\')' unless HEROKU_APP

HEROKU_GIT_URL = "git@heroku.com:#{HEROKU_APP}.git"
TEMP_DIFF_REMOTE = 'temp_diff_remote'

# Check if there is migrations to run
puts `git remote add #{TEMP_DIFF_REMOTE} #{HEROKU_GIT_URL}`
puts `git fetch #{TEMP_DIFF_REMOTE}`
there_is_migrations_to_run = !`git diff HEAD #{TEMP_DIFF_REMOTE}/master db/migrate`.empty?
puts `git remote rm #{TEMP_DIFF_REMOTE}`

# Push code to heroku app
puts `git push #{HEROKU_GIT_URL} master`

# Run migrations if needed and restart app
if there_is_migrations_to_run
  puts `heroku maintenance:on -a #{HEROKU_APP}`
  puts `heroku run rake db:migrate -a #{HEROKU_APP}`
  puts `heroku restart -a #{HEROKU_APP}`
  puts `heroku maintenance:off -a #{HEROKU_APP}`
else
  puts `heroku restart -a #{HEROKU_APP}`
end