Capistrano task to load production data into development database

desc "Load production data into development database"
task :import_remote_db do

  filename = "dump.#{Time.now.strftime '%Y-%m-%d_%H:%M:%S'}.sql"
  dbuser = "yourusername"
  dbhost = "yourhostname"
  dbpassword = "yourpassword"
  application_db = "yourdatabasename"
  local_db_host = "localhost"
  local_db_user = "local_user_name"
  local_db_password = "local_password"
  local_db = "localdatabasename"


  on_rollback do
    delete "/tmp/#{filename}"
    delete "/tmp/#{filename}.gz"
  end

  cmd = "mysqldump --opt --compress -u #{dbuser} --password=#{dbpassword} --host=#{dbhost} #{application_db} > /tmp/#{filename}"
  puts "Dumping remote database"
  run(cmd) do |channel, stream, data|
    puts data
  end

  # compress the file on the server
  puts "Compressing remote data"
  run "gzip -9 /tmp/#{filename}"
  puts "Fetching remote data"
  get "/tmp/#{filename}.gz", "dump.sql.gz"

  # build the import command
  # no --password= needed if password is nil.
  if local_db_password.nil?
    cmd = "mysql -u #{local_db_user} #{local_db} < dump.sql"
  else
    cmd = "mysql -u #{local_db_user} --password=#{local_db_password} #{local_db} < dump.sql"
  end

  # unzip the file. Can't use exec() for some reason so backticks will do
  puts "Uncompressing dump"
  `gzip -d dump.sql.gz`
  puts "Executing : #{cmd}"
  `#{cmd}`
  puts "Cleaning up"
  `rm -f dump.sql`

end