Heroku backup configuration for postgres

heroku_backup.rb

ENV['DATABASE_URL'] =~ /^postgres\:\/\/([^:]+)\:([^@]+)@([^\/]+)\/(.+)$/
  db_config = {
    "database" => $4,
    "username" => $1,
    "password" => $2,
    "host" => $3
  }
  database PostgreSQL do |db|
    db.name               = db_config["database"]
    db.username           = db_config["username"]
    db.password           = db_config["password"]
    db.host               = db_config["host"]
  end