capistrano: dump database

capifony

task :dump_db do
    params = capture "cat #{deploy_to}/current/app/config/parameters.yml"
    config = YAML.load(params)

    backup_path = "#{fetch(:deploy_to)}/db_dumps"
    run "mkdir -p #{backup_path}"
    basename = 'database'

    db_user = config['parameters']['database_user']
    db_pw = config['parameters']['database_password']
    db_name = config['parameters']['database_name']

    filename = "#{basename}_#{default_stage}_#{db_name}_#{Time.now.strftime '%Y-%m-%d_%H:%M:%S'}.sql.bz2"
    
    run "mysqldump -u #{db_user} -p#{db_pw} #{db_name} | bzip2 -9 > #{backup_path}/#{filename}"
end