Capistrano task for db cloning

gistfile1.rb

namespace :db do
  task :backup_name, :roles => :db, :only => { :primary => true } do
      now = Time.now
      run "mkdir -p db_backups"
      backup_time = [now.year,now.month,now.day,now.hour,now.min,now.sec].join('-')
      set :backup_file, "db_backups/#{application}-snapshot-#{backup_time}.sql"
  end
      
  desc 'Load remote production database into local development environment'
  task :clone_to_local, :roles => :db, :only => { :primary => true } do
    conf = YAML.load_file("config/database.yml")['production']
    mysql_command = [
      "mysqldump --add-drop-table",
      ("-u #{conf['username']}" if conf['username']),
      ("-p#{conf['password']}" if conf['password']),
      ("-h #{conf['host']}" if conf['host']),
      conf['database']
    ].compact.join(' ')

    backup_name
    command = "#{mysql_command} | bzip2 -c > #{backup_file}.bz2"
    run command
    system 'mkdir -p tmp' unless File.directory?('tmp')
    local_file = "tmp/#{application}.sql.bz2"
    logger.info 'downloading remote backup file ...'
    get "#{backup_file}.bz2", local_file
    conf = YAML.load_file("config/database.yml")['development']
    mysql_command = [
      "mysql",
      ("-u #{conf['username']}" if conf['username']),
      ("-p#{conf['password']}" if conf['password']),
      ("-h #{conf['host']}" if conf['host']),
      conf['database']
    ].compact.join(' ')
    command = "bzcat #{local_file} | #{mysql_command}"
    logger.info 'loading database from remote backup ...'
    logger.debug command
    system command
  end
end